diff --git a/go.mod b/go.mod index 2004a8f031a4..d8fe37e3986c 100644 --- a/go.mod +++ b/go.mod @@ -4,24 +4,19 @@ go 1.14 require ( github.com/antonmedv/expr v1.8.2 - github.com/cenkalti/backoff/v4 v4.0.2 github.com/json-iterator/go v1.1.10 github.com/kr/text v0.2.0 // indirect github.com/mitchellh/mapstructure v1.4.1 - github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect - github.com/modern-go/reflect2 v1.0.1 // indirect github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect github.com/observiq/ctimefmt v1.0.0 github.com/observiq/go-syslog/v3 v3.0.2 github.com/observiq/nanojack v0.0.0-20201106172433-343928847ebc - github.com/pkg/errors v0.9.1 // indirect github.com/stretchr/objx v0.1.1 // indirect github.com/stretchr/testify v1.6.1 go.etcd.io/bbolt v1.3.4 go.uber.org/zap v1.15.0 golang.org/x/exp v0.0.0-20200224162631-6cc2880d07d6 // indirect golang.org/x/lint v0.0.0-20200302205851-738671d3881b // indirect - golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208 golang.org/x/sys v0.0.0-20201015000850-e3ed0017c211 golang.org/x/text v0.3.3 golang.org/x/tools v0.0.0-20200904185747-39188db58858 // indirect @@ -29,4 +24,7 @@ require ( gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f // indirect gopkg.in/yaml.v2 v2.3.0 honnef.co/go/tools v0.0.1-2020.1.5 // indirect + k8s.io/api v0.19.0 + k8s.io/apimachinery v0.19.0 + k8s.io/client-go v0.19.0 ) diff --git a/go.sum b/go.sum index fc5eb3368a41..fe582b188680 100644 --- a/go.sum +++ b/go.sum @@ -1,32 +1,131 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU= +cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU= +cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY= +cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc= +cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0= +cloud.google.com/go v0.51.0/go.mod h1:hWtGJ6gnXH+KgDv+V0zFGDvpi07n3z8ZNj3T1RW0Gcw= +cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o= +cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE= +cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I= +cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw= dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU= +github.com/Azure/go-autorest/autorest v0.9.0/go.mod h1:xyHB1BMZT0cuDHU7I0+g046+BFDTQ8rEZB0s4Yfa6bI= +github.com/Azure/go-autorest/autorest v0.9.6/go.mod h1:/FALq9T/kS7b5J5qsQ+RSTUdAmGFqi0vUdVNNx8q630= +github.com/Azure/go-autorest/autorest/adal v0.5.0/go.mod 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v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8= github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8= +github.com/go-logr/logr v0.1.0/go.mod h1:ixOQHD9gLJUVQQ2ZOR7zLEifBX6tGkNJF4QyIY7sIas= +github.com/go-logr/logr v0.2.0 h1:QvGt2nLcHH0WK9orKa+ppBPAxREcH364nPUedEpK0TY= +github.com/go-logr/logr v0.2.0/go.mod h1:z6/tIYblkpsD+a4lm/fGIIU9mZ+XfAiaFtq7xTgseGU= +github.com/go-openapi/jsonpointer v0.0.0-20160704185906-46af16f9f7b1/go.mod h1:+35s3my2LFTysnkMfxsJBAMHj/DoqoB9knIWoYG/Vk0= +github.com/go-openapi/jsonreference v0.0.0-20160704190145-13c6e3589ad9/go.mod h1:W3Z9FmVs9qj+KR4zFKmDPGiLdk1D9Rlm7cyMvf57TTg= +github.com/go-openapi/spec v0.0.0-20160808142527-6aced65f8501/go.mod h1:J8+jY1nAiCcj+friV/PDoE1/3eeccG9LYBs0tYvLOWc= +github.com/go-openapi/swag v0.0.0-20160704191624-1d0bd113de87/go.mod h1:DXUve3Dpr1UfpPtxFw+EFuQ41HhCWZfha5jSVRG7C7I= +github.com/gogo/protobuf v1.3.1 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is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package buffer - -import ( - "context" - "encoding/json" - "fmt" - - "github.com/open-telemetry/opentelemetry-log-collection/entry" - "github.com/open-telemetry/opentelemetry-log-collection/operator" -) - -// Buffer is an interface for an entry buffer -type Buffer interface { - Add(context.Context, *entry.Entry) error - Read([]*entry.Entry) (Clearer, int, error) - ReadWait(context.Context, []*entry.Entry) (Clearer, int, error) - ReadChunk(context.Context) ([]*entry.Entry, Clearer, error) - Close() error -} - -// Config is a struct that wraps a Builder -type Config struct { - Builder -} - -// NewConfig returns a default Config -func NewConfig() Config { - return Config{ - Builder: NewMemoryBufferConfig(), - } -} - -// Builder builds a Buffer given build context -type Builder interface { - Build(context operator.BuildContext, pluginID string) (Buffer, error) -} - -// UnmarshalJSON unmarshals JSON -func (bc *Config) UnmarshalJSON(data []byte) error { - return bc.unmarshal(func(dst interface{}) error { - return json.Unmarshal(data, dst) - }) -} - -// UnmarshalYAML unmarshals YAML -func (bc *Config) UnmarshalYAML(f func(interface{}) error) error { - return bc.unmarshal(f) -} - -func (bc *Config) unmarshal(unmarshal func(interface{}) error) error { - var m map[string]interface{} - err := unmarshal(&m) - if err != nil { - return err - } - - switch m["type"] { - case "memory": - bc.Builder = NewMemoryBufferConfig() - return unmarshal(bc.Builder) - case "disk": - bc.Builder = NewDiskBufferConfig() - return unmarshal(bc.Builder) - default: - return fmt.Errorf("unknown buffer type '%s'", m["type"]) - } -} - -func (bc Config) MarshalYAML() (interface{}, error) { - return bc.Builder, nil -} - -func (bc Config) MarshalJSON() ([]byte, error) { - return json.Marshal(bc.Builder) -} - -type Clearer interface { - MarkAllAsFlushed() error - MarkRangeAsFlushed(uint, uint) error -} diff --git a/operator/buffer/buffer_test.go b/operator/buffer/buffer_test.go deleted file mode 100644 index 574d14a46345..000000000000 --- a/operator/buffer/buffer_test.go +++ /dev/null @@ -1,139 +0,0 @@ -// Copyright The OpenTelemetry Authors -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package buffer - -import ( - "encoding/json" - "testing" - "time" - - "github.com/open-telemetry/opentelemetry-log-collection/operator/helper" - "github.com/stretchr/testify/require" - yaml "gopkg.in/yaml.v2" -) - -func TestBufferUnmarshalYAML(t *testing.T) { - cases := []struct { - name string - yaml []byte - json []byte - expected Config - expectError bool - }{ - { - "SimpleMemory", - []byte("type: memory\nmax_entries: 30\n"), - []byte(`{"type": "memory", "max_entries": 30}`), - Config{ - Builder: &MemoryBufferConfig{ - Type: "memory", - MaxEntries: 30, - MaxChunkDelay: helper.NewDuration(time.Second), - MaxChunkSize: 1000, - }, - }, - false, - }, - { - "SimpleDisk", - []byte("type: disk\nmax_size: 1234\npath: /var/log/testpath\n"), - []byte(`{"type": "disk", "max_size": 1234, "path": "/var/log/testpath"}`), - Config{ - Builder: &DiskBufferConfig{ - Type: "disk", - MaxSize: 1234, - Path: "/var/log/testpath", - Sync: true, - MaxChunkDelay: helper.NewDuration(time.Second), - MaxChunkSize: 1000, - }, - }, - false, - }, - { - "UnknownType", - []byte("type: invalid\n"), - []byte(`{"type": "invalid"}`), - Config{ - Builder: &DiskBufferConfig{ - Type: "disk", - MaxSize: 1234, - Path: "/var/log/testpath", - Sync: true, - MaxChunkDelay: helper.NewDuration(time.Second), - MaxChunkSize: 1000, - }, - }, - true, - }, - { - "InvalidType", - []byte("type: !!float 123\n"), - []byte(`{"type": 12}`), - Config{ - Builder: &DiskBufferConfig{ - Type: "disk", - MaxSize: 1234, - Path: "/var/log/testpath", - Sync: true, - MaxChunkDelay: helper.NewDuration(time.Second), - MaxChunkSize: 1000, - }, - }, - true, - }, - } - - for _, tc := range cases { - t.Run(tc.name, func(t *testing.T) { - t.Run("YAML", func(t *testing.T) { - var b Config - err := yaml.Unmarshal(tc.yaml, &b) - if tc.expectError { - require.Error(t, err) - return - } - require.NoError(t, err) - require.Equal(t, tc.expected, b) - }) - - t.Run("JSON", func(t *testing.T) { - var b Config - err := json.Unmarshal(tc.json, &b) - if tc.expectError { - require.Error(t, err) - return - } - require.NoError(t, err) - require.Equal(t, tc.expected, b) - }) - }) - } -} - -func TestBuffer(t *testing.T) { - t.Run("Default", func(t *testing.T) { - cfg := NewConfig() - expected := Config{ - Builder: &MemoryBufferConfig{ - Type: "memory", - MaxEntries: 1 << 20, - MaxChunkDelay: helper.NewDuration(time.Second), - MaxChunkSize: 1000, - }, - } - require.Equal(t, expected, cfg) - }) -} diff --git a/operator/buffer/disk.go b/operator/buffer/disk.go deleted file mode 100644 index 7a862a9c33c0..000000000000 --- a/operator/buffer/disk.go +++ /dev/null @@ -1,669 +0,0 @@ -// Copyright The OpenTelemetry Authors -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package buffer - -import ( - "bytes" - "context" - "encoding/json" - "fmt" - "io" - "os" - "path/filepath" - "sync" - "time" - - "github.com/open-telemetry/opentelemetry-log-collection/entry" - "github.com/open-telemetry/opentelemetry-log-collection/operator" - "github.com/open-telemetry/opentelemetry-log-collection/operator/helper" - "golang.org/x/sync/semaphore" -) - -// DiskBufferConfig is a configuration struct for a DiskBuffer -type DiskBufferConfig struct { - Type string `json:"type" yaml:"type"` - - // MaxSize is the maximum size in bytes of the data file on disk - MaxSize helper.ByteSize `json:"max_size" yaml:"max_size"` - - // Path is a path to a directory which contains the data and metadata files - Path string `json:"path" yaml:"path"` - - // Sync indicates whether to open the files with O_SYNC. If this is set to false, - // in cases like power failures or unclean shutdowns, logs may be lost or the - // database may become corrupted. - Sync bool `json:"sync" yaml:"sync"` - - MaxChunkDelay helper.Duration `json:"max_delay" yaml:"max_delay"` - MaxChunkSize uint `json:"max_chunk_size" yaml:"max_chunk_size"` -} - -// NewDiskBufferConfig creates a new default disk buffer config -func NewDiskBufferConfig() *DiskBufferConfig { - return &DiskBufferConfig{ - Type: "disk", - MaxSize: 1 << 32, // 4GiB - Sync: true, - MaxChunkDelay: helper.NewDuration(time.Second), - MaxChunkSize: 1000, - } -} - -// Build creates a new Buffer from a DiskBufferConfig -func (c DiskBufferConfig) Build(context operator.BuildContext, _ string) (Buffer, error) { - maxSize := c.MaxSize - if maxSize == 0 { - maxSize = 1 << 32 - } - - if c.Path == "" { - return nil, fmt.Errorf("missing required field 'path'") - } - b := NewDiskBuffer(int64(maxSize)) - if err := b.Open(c.Path, c.Sync); err != nil { - return nil, err - } - b.maxChunkSize = c.MaxChunkSize - b.maxChunkDelay = c.MaxChunkDelay.Raw() - return b, nil -} - -// DiskBuffer is a buffer for storing entries on disk until they are flushed to their -// final destination. -type DiskBuffer struct { - // Metadata holds information about the current state of the buffered entries - metadata *Metadata - - // Data is the file that stores the buffered entries - data *os.File - sync.Mutex - - // atEnd indicates whether the data file descriptor is currently seeked to the - // end. This helps save us seek calls. - atEnd bool - - // entryAdded is a channel that is notified on every time an entry is added. - // The integer sent down the channel is the new number of unread entries stored. - // Readers using ReadWait will listen on this channel, and wait to read until - // there are enough entries to fill its buffer. - entryAdded chan int64 - - maxBytes int64 - flushedBytes int64 - lastCompaction time.Time - - // readerLock ensures that there is only ever one reader listening to the - // entryAdded channel at a time. - readerLock sync.Mutex - - // diskSizeSemaphore is a semaphore that allows us to block once we've hit - // the max disk size. - diskSizeSemaphore *semaphore.Weighted - - // copyBuffer is a pre-allocated byte slice that is used during compaction - copyBuffer []byte - - maxChunkDelay time.Duration - maxChunkSize uint -} - -// NewDiskBuffer creates a new DiskBuffer -func NewDiskBuffer(maxDiskSize int64) *DiskBuffer { - return &DiskBuffer{ - maxBytes: maxDiskSize, - entryAdded: make(chan int64, 1), - copyBuffer: make([]byte, 1<<16), - diskSizeSemaphore: semaphore.NewWeighted(maxDiskSize), - } -} - -// Open opens the disk buffer files from a database directory -func (d *DiskBuffer) Open(path string, sync bool) error { - var err error - dataPath := filepath.Join(path, "data") - flags := os.O_CREATE | os.O_RDWR - if sync { - flags |= os.O_SYNC - } - if d.data, err = os.OpenFile(dataPath, flags, 0755); err != nil { - return err - } - - metadataPath := filepath.Join(path, "metadata") - if d.metadata, err = OpenMetadata(metadataPath, sync); err != nil { - return err - } - - info, err := d.data.Stat() - if err != nil { - return err - } - - if ok := d.diskSizeSemaphore.TryAcquire(info.Size()); !ok { - return fmt.Errorf("current on-disk size is larger than max size") - } - - // First, if there is a dead range from a previous incomplete compaction, delete it - if err = d.deleteDeadRange(); err != nil { - return err - } - - // Compact on open - if err = d.Compact(); err != nil { - return err - } - - // Once everything is compacted, we can safely reset all previously read, but - // unflushed entries to unread - d.metadata.unreadStartOffset = 0 - d.addUnreadCount(int64(len(d.metadata.read))) - d.metadata.read = d.metadata.read[:0] - return d.metadata.Sync() -} - -// Close flushes the current metadata to disk, then closes the underlying files -func (d *DiskBuffer) Close() error { - d.Lock() - defer d.Unlock() - - if err := d.metadata.Close(); err != nil { - return err - } - return d.data.Close() -} - -// Add adds an entry to the buffer, blocking until it is either added or the context -// is cancelled. -func (d *DiskBuffer) Add(ctx context.Context, newEntry *entry.Entry) error { - var buf bytes.Buffer - var err error - enc := json.NewEncoder(&buf) - if err := enc.Encode(newEntry); err != nil { - return err - } - - if err = d.diskSizeSemaphore.Acquire(ctx, int64(buf.Len())); err != nil { - return err - } - - d.Lock() - defer d.Unlock() - - // Seek to end of the file if we're not there - if err = d.seekToEnd(); err != nil { - return err - } - - if _, err = d.data.Write(buf.Bytes()); err != nil { - return err - } - - d.addUnreadCount(1) - - return nil -} - -// addUnreadCount adds i to the unread count and notifies any callers of -// ReadWait that an entry has been added. The disk buffer lock must be held when -// calling this. -func (d *DiskBuffer) addUnreadCount(i int64) { - d.metadata.unreadCount += i - - // Notify a reader that new entries have been added by either - // sending on the channel, or updating the value in the channel - select { - case <-d.entryAdded: - d.entryAdded <- d.metadata.unreadCount - case d.entryAdded <- d.metadata.unreadCount: - } -} - -// ReadWait reads entries from the buffer, waiting until either there are enough entries in the -// buffer to fill dst or the context is cancelled. This amortizes the cost of reading from the -// disk. It returns a function that, when called, marks the read entries as flushed, the -// number of entries read, and an error. -func (d *DiskBuffer) ReadWait(ctx context.Context, dst []*entry.Entry) (Clearer, int, error) { - d.readerLock.Lock() - defer d.readerLock.Unlock() - - // Wait until the timeout is hit, or there are enough unread entries to fill the destination buffer -LOOP: - for { - select { - case n := <-d.entryAdded: - if n >= int64(len(dst)) { - break LOOP - } - case <-ctx.Done(): - break LOOP - } - } - - return d.Read(dst) -} - -// ReadChunk is a thin wrapper around ReadWait that simplifies the call at the expense of an extra allocation -func (d *DiskBuffer) ReadChunk(ctx context.Context) ([]*entry.Entry, Clearer, error) { - entries := make([]*entry.Entry, d.maxChunkSize) - for { - select { - case <-ctx.Done(): - return nil, nil, ctx.Err() - default: - } - - ctx, cancel := context.WithTimeout(ctx, d.maxChunkDelay) - defer cancel() - flushFunc, n, err := d.ReadWait(ctx, entries) - if n > 0 { - return entries[:n], flushFunc, err - } - } -} - -// Read copies entries from the disk into the destination buffer. It returns a function that, -// when called, marks the entries as flushed, the number of entries read, and an error. -func (d *DiskBuffer) Read(dst []*entry.Entry) (f Clearer, i int, err error) { - d.Lock() - defer d.Unlock() - - // Return fast if there are no unread entries - if d.metadata.unreadCount == 0 { - return d.newClearer(nil), 0, nil - } - - // Seek to the start of the range of unread entries - if err = d.seekToUnread(); err != nil { - return nil, 0, fmt.Errorf("seek to unread: %s", err) - } - - readCount := min(len(dst), int(d.metadata.unreadCount)) - newRead := make([]*readEntry, readCount) - - dec := json.NewDecoder(d.data) - startOffset := d.metadata.unreadStartOffset - for i := 0; i < readCount; i++ { - // Decode an entry from the file - var entry entry.Entry - err := dec.Decode(&entry) - if err != nil { - return nil, 0, fmt.Errorf("decode: %s", err) - } - dst[i] = &entry - - // Calculate the end offset of the entry. We add one because - // the decoder doesn't consume the newline at the end of every entry - endOffset := d.metadata.unreadStartOffset + dec.InputOffset() + 1 - newRead[i] = &readEntry{ - startOffset: startOffset, - length: endOffset - startOffset, - } - - // The start offset of the next entry is the end offset of the current - startOffset = endOffset - } - - // Set the offset for the next unread entry - d.metadata.unreadStartOffset = startOffset - - // Keep track of the newly read entries - d.metadata.read = append(d.metadata.read, newRead...) - - // Remove the read entries from the unread count - d.addUnreadCount(-int64(readCount)) - - return d.newClearer(newRead), readCount, nil -} - -// newFlushFunc returns a function that marks read entries as flushed -func (d *DiskBuffer) newClearer(newRead []*readEntry) Clearer { - return &diskClearer{ - buffer: d, - readEntries: newRead, - } -} - -type diskClearer struct { - buffer *DiskBuffer - readEntries []*readEntry -} - -func (dc *diskClearer) MarkAllAsFlushed() error { - dc.buffer.Lock() - for _, entry := range dc.readEntries { - entry.flushed = true - dc.buffer.flushedBytes += entry.length - } - dc.buffer.Unlock() - return dc.buffer.checkCompact() -} - -func (dc *diskClearer) MarkRangeAsFlushed(start, end uint) error { - if int(end) > len(dc.readEntries) || int(start) > len(dc.readEntries) { - return fmt.Errorf("invalid range") - } - - dc.buffer.Lock() - for _, entry := range dc.readEntries[start:end] { - entry.flushed = true - dc.buffer.flushedBytes += entry.length - } - dc.buffer.Unlock() - return dc.buffer.checkCompact() -} - -// checkCompact checks if a compaction should be performed, then kicks one off -func (d *DiskBuffer) checkCompact() error { - d.Lock() - switch { - case d.flushedBytes > d.maxBytes/2: - fallthrough - case time.Since(d.lastCompaction) > 5*time.Second: - d.Unlock() - if err := d.Compact(); err != nil { - return err - } - default: - d.Unlock() - } - return nil -} - -// Compact removes all flushed entries from disk -func (d *DiskBuffer) Compact() error { - d.Lock() - defer d.Unlock() - defer func() { d.lastCompaction = time.Now() }() - - // So how does this work? The goal here is to remove all flushed entries from disk, - // freeing up space for new entries. We do this by going through each entry that has - // been read and checking if it has been flushed. If it has, we know that space on - // disk is re-claimable, so we can move unflushed entries into its place. - // - // The tricky part is that we can't overwrite any data until we've both safely copied it - // to its new location and written a copy of the metadata that describes where that data - // is located on disk. This ensures that, if our process is killed mid-compaction, we will - // always have a complete, uncorrupted database. - // - // We do this by maintaining a "dead range" during compation. The dead range is - // effectively a range of bytes that can safely be deleted from disk just by shifting - // everything that comes after it backwards in the file. Then, when we open the disk - // buffer, the first thing we do is delete the dead range if it exists. - // - // To clear out flushed entries, we iterate over all the entries that have been read, - // finding ranges of either flushed or unflushed entries. If we have a range of flushed - // entries, we can expand the dead range to include the space those entries took on disk. - // If we find a range of unflushed entries, we move them to the beginning of the dead range - // and advance the start of the dead range to the end of the copied bytes. - // - // Once we iterate through all the read entries, we should be left with a dead range - // that's located right before the start of the unread entries. Since we know none of the - // unread entries need be flushed, we can simply bubble the dead range through the unread - // entries, then truncate the dead range from the end of the file once we're done. - // - // The most important part here is to sync the metadata to disk before overwriting any - // data. That way, at startup, we know where the dead zone is in the file so we can - // safely delete it without deleting any live data. - // - // Example: - // (f = flushed byte, r = read byte, u = unread byte, lowercase = dead range) - // - // FFFFRRRRFFRRRRRRRUUUUUUUUU // start of compaction - // ffffRRRRFFRRRRRRRUUUUUUUUU // mark the first flushed range as unread - // RRRRrrrrFFRRRRRRRUUUUUUUUU // move the read range to the beginning of the dead range - // RRRRrrrrffRRRRRRRUUUUUUUUU // expand the dead range to include the flushed range - // RRRRRRRRRRrrrrrrRUUUUUUUUU // move the portion of the next read range that fits into the dead range - // RRRRRRRRRRRrrrrrrUUUUUUUUU // move the remainder of the read range to start of the dead range - // RRRRRRRRRRRUUUUUUuuuuuuUUU // move the unread entries that fit into the dead range - // RRRRRRRRRRRUUUUUUUUUuuuuuu // move the remainder of the unread entries into the dead range - // RRRRRRRRRRRUUUUUUUUU // truncate the file to remove the dead range - - m := d.metadata - if m.deadRangeLength != 0 { - return fmt.Errorf("cannot compact the disk buffer before removing the dead range") - } - - for start := 0; start < len(m.read); { - if m.read[start].flushed { - // Find the end index of the range of flushed entries - end := start + 1 - for ; end < len(m.read); end++ { - if !m.read[end].flushed { - break - } - } - - // Expand the dead range - if err := d.markFlushedRangeDead(start, end); err != nil { - return err - } - } else { - // Find the end index of the range of unflushed entries - end := start + 1 - for ; end < len(m.read); end++ { - if m.read[end].flushed { - break - } - } - - // Slide the unread range left, to the start of the dead range - if err := d.shiftUnreadRange(start, end); err != nil { - return err - } - - // Update i - start = end - } - } - - // Bubble the dead space through the unflushed entries, then truncate - return d.deleteDeadRange() -} - -func (d *DiskBuffer) markFlushedRangeDead(start, end int) error { - m := d.metadata - // Expand the dead range - rangeSize := onDiskSize(m.read[start:end]) - m.deadRangeLength += rangeSize - d.flushedBytes -= rangeSize - - // Update the effective offsets if the dead range is removed - for _, entry := range m.read[end:] { - entry.startOffset -= rangeSize - } - - // Update the effective unreadStartOffset if the dead range is removed - m.unreadStartOffset -= rangeSize - - // Delete the flushed range from metadata - m.read = append(m.read[:start], m.read[end:]...) - - // Sync to disk - return d.metadata.Sync() -} - -func (d *DiskBuffer) shiftUnreadRange(start, end int) error { - m := d.metadata - // If there is no dead range, no need to move unflushed entries - rangeSize := onDiskSize(m.read[start:end]) - if m.deadRangeLength == 0 { - m.deadRangeStart += rangeSize - return nil - } - - // Slide the range left, syncing dead range after every chunk - for bytesMoved := 0; bytesMoved < int(rangeSize); { - remainingBytes := int(rangeSize) - bytesMoved - chunkSize := min(int(m.deadRangeLength), remainingBytes) - - // Move the chunk to the beginning of the dead space - _, err := d.moveRange( - m.deadRangeStart, - m.deadRangeLength, - m.read[start].startOffset+int64(bytesMoved)+m.deadRangeLength, - int64(chunkSize), - ) - if err != nil { - return err - } - - // Update the offset of the dead space - m.deadRangeStart += int64(chunkSize) - bytesMoved += chunkSize - - // Sync to disk all at once - if err = d.metadata.Sync(); err != nil { - return err - } - } - - return nil -} - -// deleteDeadRange moves the dead range to the end of the file, chunk by chunk, -// so that if it is interrupted, it can just be continued at next startup. -func (d *DiskBuffer) deleteDeadRange() error { - // Exit fast if there is no dead range - if d.metadata.deadRangeLength == 0 { - if d.metadata.deadRangeStart != 0 { - return d.metadata.setDeadRange(0, 0) - } - return nil - } - - for { - // Replace the range with the proceeding range of bytes - start := d.metadata.deadRangeStart - length := d.metadata.deadRangeLength - n, err := d.moveRange( - start, - length, - start+length, - length, - ) - if err != nil { - return err - } - - // Update the dead range, writing to disk - if err = d.metadata.setDeadRange(start+length, length); err != nil { - return err - } - - if int64(n) < d.metadata.deadRangeLength { - // We're at the end of the file - break - } - } - - info, err := d.data.Stat() - if err != nil { - return err - } - - // Truncate the extra space at the end of the file - if err = d.data.Truncate(info.Size() - d.metadata.deadRangeLength); err != nil { - return err - } - - d.diskSizeSemaphore.Release(d.metadata.deadRangeLength) - - if err = d.metadata.setDeadRange(0, 0); err != nil { - return err - } - - return nil -} - -// moveRange moves from length2 bytes starting from start2 into the space from start1 -// to start1+length1 -func (d *DiskBuffer) moveRange(start1, length1, start2, length2 int64) (int, error) { - if length2 > length1 { - return 0, fmt.Errorf("cannot move a range into a space smaller than itself") - } - - readPosition := start2 - writePosition := start1 - bytesRead := 0 - - rd := io.LimitReader(d.data, length2) - - eof := false - for !eof { - // Seek to last read position - if err := d.seekTo(readPosition); err != nil { - return 0, err - } - - // Read a chunk - n, err := rd.Read(d.copyBuffer) - if err != nil { - if err != io.EOF { - return 0, err - } - eof = true - } - readPosition += int64(n) - bytesRead += n - - // Write the chunk back into a free region - _, err = d.data.WriteAt(d.copyBuffer[:n], writePosition) - if err != nil { - return 0, err - } - writePosition += int64(n) - } - - return bytesRead, nil -} - -// seekToEnd seeks the data file descriptor to the end of the -// file, but only if we're not already at the end. -func (d *DiskBuffer) seekToEnd() error { - if !d.atEnd { - if _, err := d.data.Seek(0, 2); err != nil { - return err - } - d.atEnd = true - } - return nil -} - -// seekToUnread seeks the data file descriptor to the beginning -// of the first unread message -func (d *DiskBuffer) seekToUnread() error { - _, err := d.data.Seek(d.metadata.unreadStartOffset, 0) - d.atEnd = false - return err -} - -// seekTo seeks the data file descriptor to the given offset. -// This is used rather than (*os.File).Seek() because it also sets -// atEnd correctly. -func (d *DiskBuffer) seekTo(pos int64) error { - // Seek to last read position - _, err := d.data.Seek(pos, 0) - d.atEnd = false - return err -} - -// min returns the minimum of two ints -func min(first, second int) int { - m := first - if second < first { - m = second - } - return m -} diff --git a/operator/buffer/disk_metadata.go b/operator/buffer/disk_metadata.go deleted file mode 100644 index 06eba8213308..000000000000 --- a/operator/buffer/disk_metadata.go +++ /dev/null @@ -1,274 +0,0 @@ -// Copyright The OpenTelemetry Authors -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package buffer - -import ( - "bytes" - "encoding/binary" - "fmt" - "io" - "os" -) - -// Metadata is a representation of the on-disk metadata file. It contains -// information about the layout, location, and flushed status of entries -// stored in the data file -type Metadata struct { - // File is a handle to the on-disk metadata store - // - // The layout of the file is as follows: - // - 8 byte DatabaseVersion as LittleEndian int64 - // - 8 byte DeadRangeStartOffset as LittleEndian int64 - // - 8 byte DeadRangeLength as LittleEndian int64 - // - 8 byte UnreadStartOffset as LittleEndian int64 - // - 8 byte UnreadCount as LittleEndian int64 - // - 8 byte ReadCount as LittleEndian int64 - // - Repeated ReadCount times: - // - 1 byte Flushed bool LittleEndian - // - 8 byte Length as LittleEndian int64 - // - 8 byte StartOffset as LittleEndian int64 - file *os.File - - // read is the collection of entries that have been read - read []*readEntry - - // unreadStartOffset is the offset on disk where the contiguous - // range of unread entries start - unreadStartOffset int64 - - // unreadCount is the number of unread entries on disk - unreadCount int64 - - // deadRangeStart is file offset of the beginning of the dead range. - // The dead range is a range of the file that contains unused information - // and should only exist during a compaction. If this exists on startup, - // it should be removed as part of the startup compaction. - deadRangeStart int64 - - // deadRangeLength is the length of the dead range - deadRangeLength int64 -} - -// OpenMetadata opens and parses the metadata -func OpenMetadata(path string, sync bool) (*Metadata, error) { - m := &Metadata{} - - var err error - flags := os.O_CREATE | os.O_RDWR - if sync { - flags |= os.O_SYNC - } - if m.file, err = os.OpenFile(path, flags, 0755); err != nil { - return &Metadata{}, err - } - - info, err := m.file.Stat() - if err != nil { - return &Metadata{}, err - } - - if info.Size() > 0 { - err = m.UnmarshalBinary(m.file) - if err != nil { - return &Metadata{}, fmt.Errorf("read metadata file: %s", err) - } - } else { - m.read = make([]*readEntry, 0, 1000) - } - - return m, nil -} - -// Sync persists the metadata to disk -func (m *Metadata) Sync() error { - // Serialize to a buffer first so we write all at once - var buf bytes.Buffer - if err := m.MarshalBinary(&buf); err != nil { - return err - } - - // Write the whole thing to the file - n, err := m.file.WriteAt(buf.Bytes(), 0) - if err != nil { - return err - } - - // Since our on-disk format for metadata self-describes length, - // it's okay to truncate as a separate operation because an un-truncated - // file is still readable - err = m.file.Truncate(int64(n)) - if err != nil { - return err - } - - return nil -} - -// Close syncs metadata to disk and closes the underlying file descriptor -func (m *Metadata) Close() error { - err := m.Sync() - if err != nil { - return err - } - m.file.Close() - return nil -} - -// setDeadRange sets the dead range start and length, then persists it to disk -// without rewriting the whole file -func (m *Metadata) setDeadRange(start, length int64) error { - m.deadRangeStart = start - m.deadRangeLength = length - var buf bytes.Buffer - if err := binary.Write(&buf, binary.LittleEndian, m.deadRangeStart); err != nil { - return err - } - if err := binary.Write(&buf, binary.LittleEndian, m.deadRangeLength); err != nil { - return err - } - _, err := m.file.WriteAt(buf.Bytes(), 8) - return err -} - -// MarshalBinary marshals a metadata struct to a binary stream -func (m *Metadata) MarshalBinary(wr io.Writer) (err error) { - // Version (currently unused) - if err = binary.Write(wr, binary.LittleEndian, int64(1)); err != nil { - return - } - - // Dead Range info - if err = binary.Write(wr, binary.LittleEndian, m.deadRangeStart); err != nil { - return - } - if err = binary.Write(wr, binary.LittleEndian, m.deadRangeLength); err != nil { - return - } - - // Unread range info - if err = binary.Write(wr, binary.LittleEndian, m.unreadStartOffset); err != nil { - return - } - if err = binary.Write(wr, binary.LittleEndian, m.unreadCount); err != nil { - return - } - - // Read entries offsets - if err = binary.Write(wr, binary.LittleEndian, int64(len(m.read))); err != nil { - return - } - for _, readEntry := range m.read { - if err = readEntry.MarshalBinary(wr); err != nil { - return - } - } - return nil -} - -// UnmarshalBinary unmarshals metadata from a binary stream (usually a file) -func (m *Metadata) UnmarshalBinary(r io.Reader) error { - // Read version - var version int64 - if err := binary.Read(r, binary.LittleEndian, &version); err != nil { - return fmt.Errorf("failed to read version: %s", err) - } - - // Read dead range - if err := binary.Read(r, binary.LittleEndian, &m.deadRangeStart); err != nil { - return err - } - if err := binary.Read(r, binary.LittleEndian, &m.deadRangeLength); err != nil { - return err - } - - // Read unread info - if err := binary.Read(r, binary.LittleEndian, &m.unreadStartOffset); err != nil { - return fmt.Errorf("read unread start offset: %s", err) - } - if err := binary.Read(r, binary.LittleEndian, &m.unreadCount); err != nil { - return fmt.Errorf("read contiguous count: %s", err) - } - - // Read read info - var readCount int64 - if err := binary.Read(r, binary.LittleEndian, &readCount); err != nil { - return fmt.Errorf("read read count: %s", err) - } - m.read = make([]*readEntry, readCount) - for i := 0; i < int(readCount); i++ { - newEntry := &readEntry{} - if err := newEntry.UnmarshalBinary(r); err != nil { - return err - } - - m.read[i] = newEntry - } - - return nil -} - -// readEntry is a struct holding metadata about read entries -type readEntry struct { - // A flushed entry is one that has been flushed and is ready - // to be removed from disk - flushed bool - - // The number of bytes the entry takes on disk - length int64 - - // The offset in the file where the entry starts - startOffset int64 -} - -// MarshalBinary marshals a readEntry struct to a binary stream -func (re readEntry) MarshalBinary(wr io.Writer) error { - if err := binary.Write(wr, binary.LittleEndian, re.flushed); err != nil { - return err - } - if err := binary.Write(wr, binary.LittleEndian, re.length); err != nil { - return err - } - if err := binary.Write(wr, binary.LittleEndian, re.startOffset); err != nil { - return err - } - return nil -} - -// UnmarshalBinary unmarshals a binary stream into a readEntry struct -func (re *readEntry) UnmarshalBinary(r io.Reader) error { - if err := binary.Read(r, binary.LittleEndian, &re.flushed); err != nil { - return fmt.Errorf("read disk entry flushed: %s", err) - } - - if err := binary.Read(r, binary.LittleEndian, &re.length); err != nil { - return fmt.Errorf("read disk entry length: %s", err) - } - - if err := binary.Read(r, binary.LittleEndian, &re.startOffset); err != nil { - return fmt.Errorf("read disk entry start offset: %s", err) - } - return nil -} - -// onDiskSize calculates the size in bytes on disk for a contiguous -// range of diskEntries -func onDiskSize(entries []*readEntry) int64 { - if len(entries) == 0 { - return 0 - } - - last := entries[len(entries)-1] - return last.startOffset + last.length - entries[0].startOffset -} diff --git a/operator/buffer/disk_metadata_test.go b/operator/buffer/disk_metadata_test.go deleted file mode 100644 index 0e1b9e9f0d71..000000000000 --- a/operator/buffer/disk_metadata_test.go +++ /dev/null @@ -1,78 +0,0 @@ -// Copyright The OpenTelemetry Authors -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package buffer - -import ( - "bytes" - "strconv" - "testing" - - "github.com/stretchr/testify/require" -) - -func TestMetadata(t *testing.T) { - t.Run("binaryRoundTrip", func(t *testing.T) { - cases := [...]Metadata{ - 0: { - read: []*readEntry{}, - unreadStartOffset: 0, - unreadCount: 0, - deadRangeStart: 0, - deadRangeLength: 0, - }, - 1: { - read: []*readEntry{}, - unreadStartOffset: 0, - unreadCount: 50, - deadRangeStart: 0, - deadRangeLength: 0, - }, - 2: { - read: []*readEntry{ - { - flushed: false, - length: 10, - startOffset: 0, - }, - }, - unreadStartOffset: 10, - unreadCount: 50, - deadRangeStart: 0, - deadRangeLength: 0, - }, - 3: { - read: []*readEntry{}, - unreadStartOffset: 0, - unreadCount: 50, - deadRangeStart: 10, - deadRangeLength: 100, - }, - } - - for i, md := range cases { - t.Run(strconv.Itoa(i), func(t *testing.T) { - var buf bytes.Buffer - err := md.MarshalBinary(&buf) - require.NoError(t, err) - - md2 := Metadata{} - err = md2.UnmarshalBinary(&buf) - require.NoError(t, err) - - require.Equal(t, md, md2) - }) - } - }) -} diff --git a/operator/buffer/disk_test.go b/operator/buffer/disk_test.go deleted file mode 100644 index 87ed6fa482ec..000000000000 --- a/operator/buffer/disk_test.go +++ /dev/null @@ -1,345 +0,0 @@ -// Copyright The OpenTelemetry Authors -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package buffer - -import ( - "context" - "fmt" - "math/rand" - "strconv" - "sync" - "time" - - "testing" - - "github.com/open-telemetry/opentelemetry-log-collection/entry" - "github.com/open-telemetry/opentelemetry-log-collection/testutil" - "github.com/stretchr/testify/require" -) - -func openBuffer(t testing.TB) *DiskBuffer { - buffer := NewDiskBuffer(1 << 20) - dir := testutil.NewTempDir(t) - err := buffer.Open(dir, false) - require.NoError(t, err) - t.Cleanup(func() { buffer.Close() }) - return buffer -} - -func compact(t testing.TB, b *DiskBuffer) { - err := b.Compact() - require.NoError(t, err) -} - -func TestDiskBuffer(t *testing.T) { - t.Run("Simple", func(t *testing.T) { - t.Parallel() - b := openBuffer(t) - writeN(t, b, 1, 0) - readN(t, b, 1, 0) - }) - - t.Run("Write2Read1Read1", func(t *testing.T) { - t.Parallel() - b := openBuffer(t) - writeN(t, b, 2, 0) - readN(t, b, 1, 0) - readN(t, b, 1, 1) - }) - - t.Run("Write20Read10Read10", func(t *testing.T) { - t.Parallel() - b := openBuffer(t) - writeN(t, b, 20, 0) - readN(t, b, 10, 0) - readN(t, b, 10, 10) - }) - - t.Run("SingleReadWaitMultipleWrites", func(t *testing.T) { - t.Parallel() - b := openBuffer(t) - writeN(t, b, 10, 0) - readyDone := make(chan struct{}) - go func() { - readyDone <- struct{}{} - readWaitN(t, b, 20) - readyDone <- struct{}{} - }() - <-readyDone - time.Sleep(100 * time.Millisecond) - writeN(t, b, 10, 10) - <-readyDone - }) - - t.Run("ReadWaitOnlyWaitForPartialWrite", func(t *testing.T) { - t.Parallel() - b := openBuffer(t) - writeN(t, b, 10, 0) - readyDone := make(chan struct{}) - go func() { - readyDone <- struct{}{} - readWaitN(t, b, 15) - readyDone <- struct{}{} - }() - <-readyDone - writeN(t, b, 10, 10) - <-readyDone - readN(t, b, 5, 15) - }) - - t.Run("Write10Read10Read0", func(t *testing.T) { - t.Parallel() - b := openBuffer(t) - writeN(t, b, 10, 0) - readN(t, b, 10, 0) - dst := make([]*entry.Entry, 10) - _, n, err := b.Read(dst) - require.NoError(t, err) - require.Equal(t, 0, n) - }) - - t.Run("Write20Read10Read10Unfull", func(t *testing.T) { - t.Parallel() - b := openBuffer(t) - writeN(t, b, 20, 0) - readN(t, b, 10, 0) - dst := make([]*entry.Entry, 20) - _, n, err := b.Read(dst) - require.NoError(t, err) - require.Equal(t, 10, n) - }) - - t.Run("Write20Read10CompactRead10", func(t *testing.T) { - t.Parallel() - b := openBuffer(t) - writeN(t, b, 20, 0) - flushN(t, b, 10, 0) - compact(t, b) - readN(t, b, 10, 10) - }) - - t.Run("Write10Read2Flush2Read2Compact", func(t *testing.T) { - t.Parallel() - b := openBuffer(t) - writeN(t, b, 10, 0) - readN(t, b, 2, 0) - flushN(t, b, 2, 2) - readN(t, b, 2, 4) - require.NoError(t, b.Compact()) - }) - - t.Run("Write20Read10CloseRead20", func(t *testing.T) { - t.Parallel() - b := NewDiskBuffer(1 << 30) - dir := testutil.NewTempDir(t) - err := b.Open(dir, false) - require.NoError(t, err) - - writeN(t, b, 20, 0) - readN(t, b, 10, 0) - err = b.Close() - require.NoError(t, err) - - b2 := NewDiskBuffer(1 << 30) - err = b2.Open(dir, false) - require.NoError(t, err) - readN(t, b2, 20, 0) - }) - - t.Run("Write20Flush10CloseRead20", func(t *testing.T) { - t.Parallel() - b := NewDiskBuffer(1 << 30) - dir := testutil.NewTempDir(t) - err := b.Open(dir, false) - require.NoError(t, err) - - writeN(t, b, 20, 0) - flushN(t, b, 10, 0) - err = b.Close() - require.NoError(t, err) - - b2 := NewDiskBuffer(1 << 30) - err = b2.Open(dir, false) - require.NoError(t, err) - readN(t, b2, 10, 10) - }) - - t.Run("ReadWaitTimesOut", func(t *testing.T) { - t.Parallel() - b := openBuffer(t) - ctx, cancel := context.WithTimeout(context.Background(), 10*time.Millisecond) - defer cancel() - dst := make([]*entry.Entry, 10) - _, n, err := b.ReadWait(ctx, dst) - require.NoError(t, err) - require.Equal(t, 0, n) - }) - - t.Run("AddTimesOut", func(t *testing.T) { - t.Parallel() - b := NewDiskBuffer(100) // Enough space for 1, but not 2 entries - dir := testutil.NewTempDir(t) - err := b.Open(dir, false) - require.NoError(t, err) - - // Add a first entry - err = b.Add(context.Background(), entry.New()) - require.NoError(t, err) - - // Second entry should block and be cancelled - ctx, cancel := context.WithTimeout(context.Background(), 10*time.Millisecond) - err = b.Add(ctx, entry.New()) - require.Error(t, err) - cancel() - - // Read, flush, and compact - dst := make([]*entry.Entry, 1) - c, n, err := b.Read(dst) - require.NoError(t, err) - require.Equal(t, 1, n) - require.NoError(t, c.MarkAllAsFlushed()) - require.NoError(t, b.Compact()) - - // Now there should be space for another entry - err = b.Add(context.Background(), entry.New()) - require.NoError(t, err) - }) - - t.Run("Write1kRandomFlushReadCompact", func(t *testing.T) { - t.Parallel() - rand.Seed(time.Now().Unix()) - seed := rand.Int63() - t.Run(strconv.Itoa(int(seed)), func(t *testing.T) { - t.Parallel() - r := rand.New(rand.NewSource(seed)) - - b := NewDiskBuffer(1 << 30) - dir := testutil.NewTempDir(t) - err := b.Open(dir, false) - require.NoError(t, err) - - writes := 0 - reads := 0 - - for i := 0; i < 1000; i++ { - j := r.Int() % 1000 - switch { - case j < 900: - writeN(t, b, 1, writes) - writes++ - case j < 990: - readCount := (writes - reads) / 2 - c := readN(t, b, readCount, reads) - if j%2 == 0 { - require.NoError(t, c.MarkAllAsFlushed()) - } - reads += readCount - default: - err := b.Compact() - require.NoError(t, err) - } - } - }) - }) -} - -func TestDiskBufferBuild(t *testing.T) { - t.Run("Default", func(t *testing.T) { - cfg := NewDiskBufferConfig() - cfg.Path = testutil.NewTempDir(t) - b, err := cfg.Build(testutil.NewBuildContext(t), "test") - require.NoError(t, err) - diskBuffer := b.(*DiskBuffer) - require.Equal(t, diskBuffer.atEnd, false) - require.Len(t, diskBuffer.entryAdded, 1) - require.Equal(t, diskBuffer.maxBytes, int64(1<<32)) - require.Equal(t, diskBuffer.flushedBytes, int64(0)) - require.Len(t, diskBuffer.copyBuffer, 1<<16) - }) -} - -func BenchmarkDiskBuffer(b *testing.B) { - b.Run("NoSync", func(b *testing.B) { - buffer := openBuffer(b) - var wg sync.WaitGroup - - wg.Add(1) - go func() { - defer wg.Done() - fmt.Printf("Benchmark: %d\n", b.N) - e := entry.New() - e.Record = "test log" - ctx := context.Background() - for i := 0; i < b.N; i++ { - panicOnErr(buffer.Add(ctx, e)) - } - }() - - wg.Add(1) - go func() { - defer wg.Done() - dst := make([]*entry.Entry, 1000) - ctx := context.Background() - for i := 0; i < b.N; { - ctx, cancel := context.WithTimeout(ctx, 50*time.Millisecond) - c, n, err := buffer.ReadWait(ctx, dst) - cancel() - panicOnErr(err) - i += n - require.NoError(b, c.MarkAllAsFlushed()) - } - }() - - wg.Wait() - }) - - b.Run("Sync", func(b *testing.B) { - buffer := NewDiskBuffer(1 << 20) - dir := testutil.NewTempDir(b) - err := buffer.Open(dir, true) - require.NoError(b, err) - b.Cleanup(func() { buffer.Close() }) - var wg sync.WaitGroup - - wg.Add(1) - go func() { - defer wg.Done() - fmt.Printf("Benchmark: %d\n", b.N) - e := entry.New() - e.Record = "test log" - ctx := context.Background() - for i := 0; i < b.N; i++ { - panicOnErr(buffer.Add(ctx, e)) - } - }() - - wg.Add(1) - go func() { - defer wg.Done() - dst := make([]*entry.Entry, 1000) - ctx := context.Background() - for i := 0; i < b.N; { - ctx, cancel := context.WithTimeout(ctx, 50*time.Millisecond) - c, n, err := buffer.ReadWait(ctx, dst) - cancel() - panicOnErr(err) - i += n - require.NoError(b, c.MarkAllAsFlushed()) - } - }() - - wg.Wait() - }) -} diff --git a/operator/buffer/memory.go b/operator/buffer/memory.go deleted file mode 100644 index f311557051b3..000000000000 --- a/operator/buffer/memory.go +++ /dev/null @@ -1,280 +0,0 @@ -// Copyright The OpenTelemetry Authors -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package buffer - -import ( - "bytes" - "context" - "encoding/binary" - "encoding/json" - "fmt" - "sync" - "sync/atomic" - "time" - - "github.com/open-telemetry/opentelemetry-log-collection/database" - "github.com/open-telemetry/opentelemetry-log-collection/entry" - "github.com/open-telemetry/opentelemetry-log-collection/operator" - "github.com/open-telemetry/opentelemetry-log-collection/operator/helper" - "go.etcd.io/bbolt" - "golang.org/x/sync/semaphore" -) - -// MemoryBufferConfig holds the configuration for a memory buffer -type MemoryBufferConfig struct { - Type string `json:"type" yaml:"type"` - MaxEntries int `json:"max_entries" yaml:"max_entries"` - MaxChunkDelay helper.Duration `json:"max_delay" yaml:"max_delay"` - MaxChunkSize uint `json:"max_chunk_size" yaml:"max_chunk_size"` -} - -// NewMemoryBufferConfig creates a new default MemoryBufferConfig -func NewMemoryBufferConfig() *MemoryBufferConfig { - return &MemoryBufferConfig{ - Type: "memory", - MaxEntries: 1 << 20, - MaxChunkDelay: helper.NewDuration(time.Second), - MaxChunkSize: 1000, - } -} - -// Build builds a MemoryBufferConfig into a Buffer, loading any entries that were previously unflushed -// back into memory -func (c MemoryBufferConfig) Build(context operator.BuildContext, pluginID string) (Buffer, error) { - mb := &MemoryBuffer{ - db: context.Database, - pluginID: pluginID, - buf: make(chan *entry.Entry, c.MaxEntries), - sem: semaphore.NewWeighted(int64(c.MaxEntries)), - inFlight: make(map[uint64]*entry.Entry, c.MaxEntries), - maxChunkDelay: c.MaxChunkDelay.Raw(), - maxChunkSize: c.MaxChunkSize, - } - if err := mb.loadFromDB(); err != nil { - return nil, err - } - - return mb, nil -} - -// MemoryBuffer is a buffer that holds all entries in memory until Close() is called, -// at which point it saves the entries into a database. It provides no guarantees about -// lost entries if shut down uncleanly. -type MemoryBuffer struct { - db database.Database - pluginID string - buf chan *entry.Entry - inFlight map[uint64]*entry.Entry - inFlightMux sync.Mutex - entryID uint64 - sem *semaphore.Weighted - maxChunkDelay time.Duration - maxChunkSize uint -} - -// Add inserts an entry into the memory database, blocking until there is space -func (m *MemoryBuffer) Add(ctx context.Context, e *entry.Entry) error { - if err := m.sem.Acquire(ctx, 1); err != nil { - return err - } - - m.buf <- e - return nil -} - -// Read reads entries until either there are no entries left in the buffer -// or the destination slice is full. The returned function must be called -// once the entries are flushed to remove them from the memory buffer. -func (m *MemoryBuffer) Read(dst []*entry.Entry) (Clearer, int, error) { - inFlight := make([]uint64, len(dst)) - i := 0 - for ; i < len(dst); i++ { - select { - case e := <-m.buf: - dst[i] = e - id := atomic.AddUint64(&m.entryID, 1) - m.inFlightMux.Lock() - m.inFlight[id] = e - m.inFlightMux.Unlock() - inFlight[i] = id - default: - return m.newClearer(inFlight[:i]), i, nil - } - } - - return m.newClearer(inFlight[:i]), i, nil -} - -// ReadChunk is a thin wrapper around ReadWait that simplifies the call at the expense of an extra allocation -func (m *MemoryBuffer) ReadChunk(ctx context.Context) ([]*entry.Entry, Clearer, error) { - entries := make([]*entry.Entry, m.maxChunkSize) - for { - select { - case <-ctx.Done(): - return nil, nil, ctx.Err() - default: - } - - ctx, cancel := context.WithTimeout(ctx, m.maxChunkDelay) - defer cancel() - flushFunc, n, err := m.ReadWait(ctx, entries) - if n > 0 { - return entries[:n], flushFunc, err - } - } -} - -// ReadWait reads entries until either the destination slice is full, or the context passed to it -// is cancelled. The returned function must be called once the entries are flushed to remove them -// from the memory buffer -func (m *MemoryBuffer) ReadWait(ctx context.Context, dst []*entry.Entry) (Clearer, int, error) { - inFlightIDs := make([]uint64, len(dst)) - i := 0 - for ; i < len(dst); i++ { - select { - case e := <-m.buf: - dst[i] = e - id := atomic.AddUint64(&m.entryID, 1) - m.inFlightMux.Lock() - m.inFlight[id] = e - m.inFlightMux.Unlock() - inFlightIDs[i] = id - case <-ctx.Done(): - return m.newClearer(inFlightIDs[:i]), i, nil - } - } - - return m.newClearer(inFlightIDs[:i]), i, nil -} - -type memoryClearer struct { - buffer *MemoryBuffer - ids []uint64 -} - -func (mc *memoryClearer) MarkAllAsFlushed() error { - mc.buffer.inFlightMux.Lock() - for _, id := range mc.ids { - delete(mc.buffer.inFlight, id) - } - mc.buffer.inFlightMux.Unlock() - mc.buffer.sem.Release(int64(len(mc.ids))) - return nil -} - -func (mc *memoryClearer) MarkRangeAsFlushed(start, end uint) error { - if int(end) > len(mc.ids) || int(start) > len(mc.ids) { - return fmt.Errorf("invalid range") - } - - mc.buffer.inFlightMux.Lock() - for _, id := range mc.ids[start:end] { - delete(mc.buffer.inFlight, id) - } - mc.buffer.inFlightMux.Unlock() - mc.buffer.sem.Release(int64(len(mc.ids))) - return nil -} - -// newFlushFunc returns a function that will remove the entries identified by `ids` from the buffer -func (m *MemoryBuffer) newClearer(ids []uint64) Clearer { - return &memoryClearer{ - buffer: m, - ids: ids, - } -} - -// Close closes the memory buffer, saving all entries currently in the memory buffer to the -// agent's database. -func (m *MemoryBuffer) Close() error { - m.inFlightMux.Lock() - defer m.inFlightMux.Unlock() - return m.db.Update(func(tx *bbolt.Tx) error { - memBufBucket, err := tx.CreateBucketIfNotExists([]byte("memory_buffer")) - if err != nil { - return err - } - - b, err := memBufBucket.CreateBucketIfNotExists([]byte(m.pluginID)) - if err != nil { - return err - } - - for k, v := range m.inFlight { - if err := putKeyValue(b, k, v); err != nil { - return err - } - } - - for { - select { - case e := <-m.buf: - m.entryID++ - if err := putKeyValue(b, m.entryID, e); err != nil { - return err - } - default: - return nil - } - } - }) -} - -func putKeyValue(b *bbolt.Bucket, k uint64, v *entry.Entry) error { - var buf bytes.Buffer - enc := json.NewEncoder(&buf) - key := [8]byte{} - - binary.LittleEndian.PutUint64(key[:], k) - if err := enc.Encode(v); err != nil { - return err - } - return b.Put(key[:], buf.Bytes()) -} - -// loadFromDB loads any entries saved to the database previously into the memory buffer, -// allowing them to be flushed -func (m *MemoryBuffer) loadFromDB() error { - return m.db.Update(func(tx *bbolt.Tx) error { - memBufBucket := tx.Bucket([]byte("memory_buffer")) - if memBufBucket == nil { - return nil - } - - b := memBufBucket.Bucket([]byte(m.pluginID)) - if b == nil { - return nil - } - - return b.ForEach(func(k, v []byte) error { - if ok := m.sem.TryAcquire(1); !ok { - return fmt.Errorf("max_entries is smaller than the number of entries stored in the database") - } - - dec := json.NewDecoder(bytes.NewReader(v)) - var e entry.Entry - if err := dec.Decode(&e); err != nil { - return err - } - - select { - case m.buf <- &e: - return nil - default: - return fmt.Errorf("max_entries is smaller than the number of entries stored in the database") - } - }) - }) -} diff --git a/operator/buffer/memory_test.go b/operator/buffer/memory_test.go deleted file mode 100644 index e94245eb3cae..000000000000 --- a/operator/buffer/memory_test.go +++ /dev/null @@ -1,287 +0,0 @@ -// Copyright The OpenTelemetry Authors -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package buffer - -import ( - "context" - "math/rand" - "strconv" - "sync" - "time" - - "testing" - - "github.com/open-telemetry/opentelemetry-log-collection/entry" - "github.com/open-telemetry/opentelemetry-log-collection/testutil" - "github.com/stretchr/testify/require" -) - -func newMemoryBuffer(t testing.TB) *MemoryBuffer { - b, err := NewMemoryBufferConfig().Build(testutil.NewBuildContext(t), "test") - require.NoError(t, err) - return b.(*MemoryBuffer) -} - -func TestMemoryBuffer(t *testing.T) { - t.Run("Simple", func(t *testing.T) { - t.Parallel() - b := newMemoryBuffer(t) - writeN(t, b, 1, 0) - readN(t, b, 1, 0) - }) - - t.Run("Write2Read1Read1", func(t *testing.T) { - t.Parallel() - b := newMemoryBuffer(t) - writeN(t, b, 2, 0) - readN(t, b, 1, 0) - readN(t, b, 1, 1) - }) - - t.Run("Write20Read10Read10", func(t *testing.T) { - t.Parallel() - b := newMemoryBuffer(t) - writeN(t, b, 20, 0) - readN(t, b, 10, 0) - readN(t, b, 10, 10) - }) - - t.Run("CheckN", func(t *testing.T) { - t.Run("Read", func(t *testing.T) { - b := newMemoryBuffer(t) - writeN(t, b, 12, 0) - dst := make([]*entry.Entry, 30) - _, n, err := b.Read(dst) - require.NoError(t, err) - require.Equal(t, n, 12) - }) - - t.Run("ReadWait", func(t *testing.T) { - b := newMemoryBuffer(t) - writeN(t, b, 12, 0) - dst := make([]*entry.Entry, 30) - ctx, cancel := context.WithTimeout(context.Background(), 50*time.Millisecond) - defer cancel() - _, n, err := b.ReadWait(ctx, dst) - require.NoError(t, err) - require.Equal(t, 12, n) - }) - }) - - t.Run("SingleReadWaitMultipleWrites", func(t *testing.T) { - t.Parallel() - b := newMemoryBuffer(t) - writeN(t, b, 10, 0) - readyDone := make(chan struct{}) - go func() { - readyDone <- struct{}{} - readWaitN(t, b, 20) - readyDone <- struct{}{} - }() - <-readyDone - time.Sleep(100 * time.Millisecond) - writeN(t, b, 10, 10) - <-readyDone - }) - - t.Run("ReadWaitOnlyWaitForPartialWrite", func(t *testing.T) { - t.Parallel() - b := newMemoryBuffer(t) - writeN(t, b, 10, 0) - readyDone := make(chan struct{}) - go func() { - readyDone <- struct{}{} - readWaitN(t, b, 15) - readyDone <- struct{}{} - }() - <-readyDone - writeN(t, b, 10, 10) - <-readyDone - readN(t, b, 5, 15) - }) - - t.Run("Write10Read10Read0", func(t *testing.T) { - t.Parallel() - b := newMemoryBuffer(t) - writeN(t, b, 10, 0) - readN(t, b, 10, 0) - dst := make([]*entry.Entry, 10) - _, n, err := b.Read(dst) - require.NoError(t, err) - require.Equal(t, 0, n) - }) - - t.Run("Write20Read10Read10Unfull", func(t *testing.T) { - t.Parallel() - b := newMemoryBuffer(t) - writeN(t, b, 20, 0) - readN(t, b, 10, 0) - dst := make([]*entry.Entry, 20) - _, n, err := b.Read(dst) - require.NoError(t, err) - require.Equal(t, 10, n) - }) - - t.Run("ReadWaitTimesOut", func(t *testing.T) { - t.Parallel() - b := newMemoryBuffer(t) - ctx, cancel := context.WithTimeout(context.Background(), 10*time.Millisecond) - defer cancel() - dst := make([]*entry.Entry, 10) - _, n, err := b.ReadWait(ctx, dst) - require.NoError(t, err) - require.Equal(t, 0, n) - }) - - t.Run("WriteCloseRead", func(t *testing.T) { - t.Parallel() - bc := testutil.NewBuildContext(t) - b, err := NewMemoryBufferConfig().Build(bc, "test") - require.NoError(t, err) - writeN(t, b, 10, 0) - flushN(t, b, 5, 0) - - // Close the buffer, writing to the database - require.NoError(t, b.Close()) - - // Reopen, and expect to be able to read 5 logs - b, err = NewMemoryBufferConfig().Build(bc, "test") - require.NoError(t, err) - - readN(t, b, 5, 5) - dst := make([]*entry.Entry, 10) - _, n, err := b.Read(dst) - require.NoError(t, err) - require.Equal(t, 0, n) - }) - - t.Run("AddTimesOut", func(t *testing.T) { - t.Parallel() - cfg := MemoryBufferConfig{ - MaxEntries: 1, - } - b, err := cfg.Build(testutil.NewBuildContext(t), "test") - require.NoError(t, err) - - // Add a first entry - err = b.Add(context.Background(), entry.New()) - require.NoError(t, err) - - // Second entry should block and be cancelled - ctx, cancel := context.WithTimeout(context.Background(), 10*time.Millisecond) - err = b.Add(ctx, entry.New()) - require.Error(t, err) - cancel() - - // Read and flush - dst := make([]*entry.Entry, 1) - c, n, err := b.Read(dst) - require.NoError(t, err) - require.Equal(t, 1, n) - require.NoError(t, c.MarkAllAsFlushed()) - - // Now there should be space for another entry - err = b.Add(context.Background(), entry.New()) - require.NoError(t, err) - }) - - t.Run("Write10kRandom", func(t *testing.T) { - t.Parallel() - rand.Seed(time.Now().Unix()) - seed := rand.Int63() - t.Run(strconv.Itoa(int(seed)), func(t *testing.T) { - t.Parallel() - r := rand.New(rand.NewSource(seed)) - - b := newMemoryBuffer(t) - - writes := 0 - reads := 0 - - for i := 0; i < 10000; i++ { - j := r.Int() % 1000 - switch { - case j < 900: - writeN(t, b, 1, writes) - writes++ - default: - readCount := (writes - reads) / 2 - c := readN(t, b, readCount, reads) - if j%2 == 0 { - require.NoError(t, c.MarkAllAsFlushed()) - } - reads += readCount - } - } - }) - }) - - t.Run("CloseReadUnflushed", func(t *testing.T) { - t.Parallel() - buildContext := testutil.NewBuildContext(t) - b, err := NewMemoryBufferConfig().Build(buildContext, "test") - require.NoError(t, err) - - writeN(t, b, 20, 0) - readN(t, b, 5, 0) - flushN(t, b, 5, 5) - readN(t, b, 5, 10) - - err = b.Close() - require.NoError(t, err) - - b2, err := NewMemoryBufferConfig().Build(buildContext, "test") - require.NoError(t, err) - - readN(t, b2, 5, 0) - readN(t, b2, 10, 10) - }) -} - -func BenchmarkMemoryBuffer(b *testing.B) { - buffer := newMemoryBuffer(b) - var wg sync.WaitGroup - - wg.Add(1) - go func() { - defer wg.Done() - e := entry.New() - e.Record = "test log" - ctx := context.Background() - for i := 0; i < b.N; i++ { - panicOnErr(buffer.Add(ctx, e)) - } - }() - - wg.Add(1) - go func() { - defer wg.Done() - dst := make([]*entry.Entry, 1000) - ctx := context.Background() - for i := 0; i < b.N; { - ctx, cancel := context.WithTimeout(ctx, 50*time.Millisecond) - c, n, err := buffer.ReadWait(ctx, dst) - cancel() - panicOnErr(err) - i += n - go func() { - time.Sleep(50 * time.Millisecond) - require.NoError(b, c.MarkAllAsFlushed()) - }() - } - }() - - wg.Wait() -} diff --git a/operator/buffer/util_test.go b/operator/buffer/util_test.go deleted file mode 100644 index 71e0f68ad1c4..000000000000 --- a/operator/buffer/util_test.go +++ /dev/null @@ -1,73 +0,0 @@ -// Copyright The OpenTelemetry Authors -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package buffer - -import ( - "context" - "testing" - "time" - - "github.com/open-telemetry/opentelemetry-log-collection/entry" - "github.com/stretchr/testify/require" -) - -func intEntry(i int) *entry.Entry { - e := entry.New() - e.Timestamp = time.Date(2006, 01, 02, 03, 04, 05, 06, time.UTC) - e.Record = float64(i) - return e -} - -func writeN(t testing.TB, buffer Buffer, n, start int) { - ctx := context.Background() - for i := start; i < n+start; i++ { - err := buffer.Add(ctx, intEntry(i)) - require.NoError(t, err) - } -} - -func readN(t testing.TB, buffer Buffer, n, start int) Clearer { - entries := make([]*entry.Entry, n) - f, readCount, err := buffer.Read(entries) - require.NoError(t, err) - require.Equal(t, n, readCount) - for i := 0; i < n; i++ { - require.Equal(t, intEntry(start+i), entries[i]) - } - return f -} - -func readWaitN(t testing.TB, buffer Buffer, n int) { - entries := make([]*entry.Entry, n) - ctx, cancel := context.WithTimeout(context.Background(), time.Minute) - defer cancel() - _, readCount, err := buffer.ReadWait(ctx, entries) - require.NoError(t, err) - require.Equal(t, n, readCount) - for i := 0; i < n; i++ { - require.Equal(t, intEntry(i), entries[i]) - } -} - -func flushN(t testing.TB, buffer Buffer, n, start int) { - f := readN(t, buffer, n, start) - require.NoError(t, f.MarkAllAsFlushed()) -} - -func panicOnErr(err error) { - if err != nil { - panic(err) - } -} diff --git a/operator/builtin/input/k8sevent/go.mod b/operator/builtin/input/k8sevent/go.mod deleted file mode 100644 index e465fb06a76d..000000000000 --- a/operator/builtin/input/k8sevent/go.mod +++ /dev/null @@ -1,14 +0,0 @@ -module github.com/open-telemetry/opentelemetry-log-collection/operator/builtin/input/k8sevent - -go 1.14 - -require ( - github.com/open-telemetry/opentelemetry-log-collection v0.13.12 - github.com/stretchr/testify v1.6.1 - go.uber.org/zap v1.15.0 - k8s.io/api v0.19.0 - k8s.io/apimachinery v0.19.0 - k8s.io/client-go v0.19.0 -) - -replace github.com/open-telemetry/opentelemetry-log-collection => ../../../../ diff --git a/operator/builtin/input/k8sevent/go.sum b/operator/builtin/input/k8sevent/go.sum deleted file mode 100644 index 919cc1418e39..000000000000 --- a/operator/builtin/input/k8sevent/go.sum +++ /dev/null @@ -1,418 +0,0 @@ -cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= -cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= -cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU= -cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU= -cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY= -cloud.google.com/go v0.45.1/go.mod 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a/operator/builtin/transformer/hostmetadata/host_metadata.go b/operator/builtin/transformer/hostmetadata/host_metadata.go deleted file mode 100644 index 036cbaf13608..000000000000 --- a/operator/builtin/transformer/hostmetadata/host_metadata.go +++ /dev/null @@ -1,79 +0,0 @@ -// Copyright The OpenTelemetry Authors -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package hostmetadata - -import ( - "context" - - "github.com/open-telemetry/opentelemetry-log-collection/entry" - "github.com/open-telemetry/opentelemetry-log-collection/errors" - "github.com/open-telemetry/opentelemetry-log-collection/operator" - "github.com/open-telemetry/opentelemetry-log-collection/operator/helper" -) - -func init() { - operator.Register("host_metadata", func() operator.Builder { return NewHostMetadataConfig("") }) -} - -// NewHostMetadataConfig returns a HostMetadataConfig with default values -func NewHostMetadataConfig(operatorID string) *HostMetadataConfig { - return &HostMetadataConfig{ - TransformerConfig: helper.NewTransformerConfig(operatorID, "host_decorator"), - HostIdentifierConfig: helper.NewHostIdentifierConfig(), - } -} - -// HostMetadataConfig is the configuration of a host metadata operator -type HostMetadataConfig struct { - helper.TransformerConfig `yaml:",inline"` - helper.HostIdentifierConfig `yaml:",inline"` -} - -// Build will build an operator from the supplied configuration -func (c HostMetadataConfig) Build(context operator.BuildContext) ([]operator.Operator, error) { - transformerOperator, err := c.TransformerConfig.Build(context) - if err != nil { - return nil, errors.Wrap(err, "failed to build transformer") - } - - hostIdentifier, err := c.HostIdentifierConfig.Build() - if err != nil { - return nil, errors.Wrap(err, "failed to build host attributer") - } - - op := &HostMetadata{ - TransformerOperator: transformerOperator, - HostIdentifier: hostIdentifier, - } - - return []operator.Operator{op}, nil -} - -// HostMetadata is an operator that can add host metadata to incoming entries -type HostMetadata struct { - helper.TransformerOperator - helper.HostIdentifier -} - -// Process will process an incoming entry using the metadata transform. -func (h *HostMetadata) Process(ctx context.Context, entry *entry.Entry) error { - return h.ProcessWith(ctx, entry, h.Transform) -} - -// Transform will transform an entry, adding the configured host metadata. -func (h *HostMetadata) Transform(entry *entry.Entry) error { - h.HostIdentifier.Identify(entry) - return nil -} diff --git a/operator/builtin/transformer/hostmetadata/host_metadata_test.go b/operator/builtin/transformer/hostmetadata/host_metadata_test.go deleted file mode 100644 index 72aa56a5e28c..000000000000 --- a/operator/builtin/transformer/hostmetadata/host_metadata_test.go +++ /dev/null @@ -1,84 +0,0 @@ -// Copyright The OpenTelemetry Authors -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package hostmetadata - -import ( - "context" - "sync" - "testing" - - "github.com/open-telemetry/opentelemetry-log-collection/entry" - "github.com/open-telemetry/opentelemetry-log-collection/operator" - "github.com/open-telemetry/opentelemetry-log-collection/testutil" - "github.com/stretchr/testify/require" -) - -type hostMetadataBenchmark struct { - name string - cfgMod func(*HostMetadataConfig) -} - -func (g *hostMetadataBenchmark) Run(b *testing.B) { - cfg := NewHostMetadataConfig(g.name) - g.cfgMod(cfg) - ops, err := cfg.Build(testutil.NewBuildContext(b)) - require.NoError(b, err) - op := ops[0] - - fake := testutil.NewFakeOutput(b) - op.(*HostMetadata).OutputOperators = []operator.Operator{fake} - - b.ResetTimer() - var wg sync.WaitGroup - wg.Add(1) - go func() { - defer wg.Done() - for i := 0; i < b.N; i++ { - e := entry.New() - op.Process(context.Background(), e) - } - err = op.Stop() - require.NoError(b, err) - }() - - wg.Add(1) - go func() { - defer wg.Done() - for i := 0; i < b.N; i++ { - <-fake.Received - } - }() - - wg.Wait() -} - -func BenchmarkHostMetadata(b *testing.B) { - cases := []hostMetadataBenchmark{ - { - "Default", - func(cfg *HostMetadataConfig) {}, - }, - { - "NoHostname", - func(cfg *HostMetadataConfig) { - cfg.IncludeHostname = false - }, - }, - } - - for _, tc := range cases { - b.Run(tc.name, tc.Run) - } -} diff --git a/operator/builtin/transformer/k8smetadata/go.mod b/operator/builtin/transformer/k8smetadata/go.mod deleted file mode 100644 index 582451ea6649..000000000000 --- a/operator/builtin/transformer/k8smetadata/go.mod +++ /dev/null @@ -1,13 +0,0 @@ -module github.com/open-telemetry/opentelemetry-log-collection/operator/builtin/transformer/k8smetadata - -go 1.14 - -require ( - github.com/open-telemetry/opentelemetry-log-collection v0.13.12 - github.com/stretchr/testify v1.6.1 - k8s.io/apimachinery v0.19.0 - k8s.io/client-go v0.19.0 - k8s.io/utils v0.0.0-20200821003339-5e75c0163111 // indirect -) - -replace github.com/open-telemetry/opentelemetry-log-collection => ../../../../ diff --git a/operator/builtin/transformer/k8smetadata/go.sum b/operator/builtin/transformer/k8smetadata/go.sum deleted file mode 100644 index 590a7c7f3afa..000000000000 --- a/operator/builtin/transformer/k8smetadata/go.sum +++ /dev/null @@ -1,411 +0,0 @@ -cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= -cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= -cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU= -cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU= -cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY= -cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc= -cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0= -cloud.google.com/go v0.51.0/go.mod h1:hWtGJ6gnXH+KgDv+V0zFGDvpi07n3z8ZNj3T1RW0Gcw= -cloud.google.com/go/bigquery v1.0.1/go.mod 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-sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o= -sigs.k8s.io/yaml v1.2.0 h1:kr/MCeFWJWTwyaHoR9c8EjH9OumOmoF9YGiZd7lFm/Q= -sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc= diff --git a/operator/builtin/transformer/k8smetadata/k8s_metadata_decorator.go b/operator/builtin/transformer/k8smetadata/k8s_metadata_decorator.go deleted file mode 100644 index a3aa715a4368..000000000000 --- a/operator/builtin/transformer/k8smetadata/k8s_metadata_decorator.go +++ /dev/null @@ -1,373 +0,0 @@ -// Copyright The OpenTelemetry Authors -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package k8smetadata - -import ( - "context" - "net/http" - "net/url" - "sync" - "time" - - "github.com/open-telemetry/opentelemetry-log-collection/entry" - "github.com/open-telemetry/opentelemetry-log-collection/errors" - "github.com/open-telemetry/opentelemetry-log-collection/operator" - "github.com/open-telemetry/opentelemetry-log-collection/operator/helper" - metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" - "k8s.io/client-go/kubernetes" - appsv1 "k8s.io/client-go/kubernetes/typed/apps/v1" - batchv1 "k8s.io/client-go/kubernetes/typed/batch/v1" - corev1 "k8s.io/client-go/kubernetes/typed/core/v1" - "k8s.io/client-go/rest" -) - -func init() { - operator.Register("k8s_metadata_decorator", func() operator.Builder { return NewK8sMetadataDecoratorConfig("") }) -} - -// NewK8sMetadataDecoratorConfig creates a new k8s metadata decorator config with default values -func NewK8sMetadataDecoratorConfig(operatorID string) *K8sMetadataDecoratorConfig { - return &K8sMetadataDecoratorConfig{ - TransformerConfig: helper.NewTransformerConfig(operatorID, "k8s_metadata_decorator"), - PodNameField: entry.NewResourceField("k8s.pod.name"), - NamespaceField: entry.NewResourceField("k8s.namespace.name"), - CacheTTL: helper.Duration{Duration: 10 * time.Minute}, - Timeout: helper.Duration{Duration: 10 * time.Second}, - AllowProxy: false, - } -} - -// K8sMetadataDecoratorConfig is the configuration of k8s_metadata_decorator operator -type K8sMetadataDecoratorConfig struct { - helper.TransformerConfig `yaml:",inline"` - PodNameField entry.Field `json:"pod_name_field,omitempty" yaml:"pod_name_field,omitempty"` - NamespaceField entry.Field `json:"namespace_field,omitempty" yaml:"namespace_field,omitempty"` - CacheTTL helper.Duration `json:"cache_ttl,omitempty" yaml:"cache_ttl,omitempty"` - Timeout helper.Duration `json:"timeout,omitempty" yaml:"timeout,omitempty"` - AllowProxy bool `json:"allow_proxy,omitempty" yaml:"allow_proxy,omitempty"` -} - -// Build will build a k8s_metadata_decorator operator from the supplied configuration -func (c K8sMetadataDecoratorConfig) Build(context operator.BuildContext) ([]operator.Operator, error) { - transformer, err := c.TransformerConfig.Build(context) - if err != nil { - return nil, errors.Wrap(err, "build transformer") - } - - op := &K8sMetadataDecorator{ - TransformerOperator: transformer, - podNameField: c.PodNameField, - namespaceField: c.NamespaceField, - cacheTTL: c.CacheTTL.Raw(), - timeout: c.Timeout.Raw(), - allowProxy: c.AllowProxy, - } - - return []operator.Operator{op}, nil -} - -// K8sMetadataDecorator is an operator for decorating entries with kubernetes metadata -type K8sMetadataDecorator struct { - helper.TransformerOperator - podNameField entry.Field - namespaceField entry.Field - - client *corev1.CoreV1Client - appsClient *appsv1.AppsV1Client - batchClient *batchv1.BatchV1Client - - namespaceCache MetadataCache - podCache MetadataCache - cacheTTL time.Duration - timeout time.Duration - allowProxy bool -} - -// MetadataCacheEntry is an entry in the metadata cache -type MetadataCacheEntry struct { - ClusterName string - UID string - ExpirationTime time.Time - Attributes map[string]string - Annotations map[string]string - - AdditionalResourceValues map[string]string -} - -// MetadataCache is a cache of kubernetes metadata -type MetadataCache struct { - m sync.Map -} - -// Load will return an entry stored in the metadata cache -func (m *MetadataCache) Load(key string) (MetadataCacheEntry, bool) { - entry, ok := m.m.Load(key) - if ok { - return entry.(MetadataCacheEntry), ok - } - return MetadataCacheEntry{}, ok -} - -// Store will store an entry in the metadata cache -func (m *MetadataCache) Store(key string, entry MetadataCacheEntry) { - m.m.Store(key, entry) -} - -// Start will start the k8s_metadata_decorator operator -func (k *K8sMetadataDecorator) Start() error { - config, err := rest.InClusterConfig() - if err != nil { - return errors.NewError( - "agent not in kubernetes cluster", - "the k8s_metadata_decorator operator only supports running in a pod inside a kubernetes cluster", - ) - } - - if !k.allowProxy { - config.Proxy = func(*http.Request) (*url.URL, error) { - return nil, nil - } - } - - clientset, err := kubernetes.NewForConfig(config) - if err != nil { - return errors.Wrap(err, "build client set") - } - - k.client = clientset.CoreV1().(*corev1.CoreV1Client) - k.appsClient = clientset.AppsV1().(*appsv1.AppsV1Client) - k.batchClient = clientset.BatchV1().(*batchv1.BatchV1Client) - - // Test connection - ctx, cancel := context.WithTimeout(context.Background(), k.timeout) - defer cancel() - namespaceList, err := k.client.Namespaces().List(ctx, metav1.ListOptions{}) - if err != nil { - return errors.Wrap(err, "test connection list namespaces") - } - - if len(namespaceList.Items) == 0 { - k.Warn("During test connection, namespace list came back empty") - return nil - } - - namespaceName := namespaceList.Items[0].ObjectMeta.Name - _, err = k.client.Pods(namespaceName).List(ctx, metav1.ListOptions{}) - if err != nil { - return errors.Wrap(err, "test connection list pods") - } - - return nil -} - -// Process will process an entry received by the k8s_metadata_decorator operator -func (k *K8sMetadataDecorator) Process(ctx context.Context, entry *entry.Entry) error { - var podName string - err := entry.Read(k.podNameField, &podName) - if err != nil { - return k.HandleEntryError(ctx, entry, errors.Wrap(err, "find pod name").WithDetails("search_field", k.podNameField.String())) - } - - var namespace string - err = entry.Read(k.namespaceField, &namespace) - if err != nil { - return k.HandleEntryError(ctx, entry, errors.Wrap(err, "find namespace").WithDetails("search_field", k.podNameField.String())) - } - - nsMeta, err := k.getNamespaceMetadata(ctx, namespace) - if err != nil { - return k.HandleEntryError(ctx, entry, err) - } - k.decorateEntryWithNamespaceMetadata(nsMeta, entry) - - podMeta, err := k.getPodMetadata(ctx, namespace, podName) - if err != nil { - return k.HandleEntryError(ctx, entry, err) - } - k.decorateEntryWithPodMetadata(podMeta, entry) - - k.Write(ctx, entry) - return nil -} - -func (k *K8sMetadataDecorator) getNamespaceMetadata(ctx context.Context, namespace string) (MetadataCacheEntry, error) { - cacheEntry, ok := k.namespaceCache.Load(namespace) - - var err error - if !ok || cacheEntry.ExpirationTime.Before(time.Now()) { - cacheEntry, err = k.refreshNamespaceMetadata(ctx, namespace) - } - - return cacheEntry, err -} - -func (k *K8sMetadataDecorator) getPodMetadata(ctx context.Context, namespace, podName string) (MetadataCacheEntry, error) { - key := namespace + ":" + podName - cacheEntry, ok := k.podCache.Load(key) - - var err error - if !ok || cacheEntry.ExpirationTime.Before(time.Now()) { - cacheEntry, err = k.refreshPodMetadata(ctx, namespace, podName) - } - - return cacheEntry, err -} - -func (k *K8sMetadataDecorator) refreshNamespaceMetadata(ctx context.Context, namespace string) (MetadataCacheEntry, error) { - ctx, cancel := context.WithTimeout(ctx, k.timeout) - defer cancel() - - // Query the API - namespaceResponse, err := k.client.Namespaces().Get(ctx, namespace, metav1.GetOptions{}) - if err != nil { - // Add an empty entry to the cache so we don't continuously retry - cacheEntry := MetadataCacheEntry{ExpirationTime: time.Now().Add(10 * time.Second)} - k.namespaceCache.Store(namespace, cacheEntry) - return cacheEntry, errors.Wrap(err, "get namespace metadata").WithDetails("namespace", namespace).WithDetails("retry_after", "10s") - } - - // Cache the results - cacheEntry := MetadataCacheEntry{ - ClusterName: namespaceResponse.ClusterName, - ExpirationTime: time.Now().Add(k.cacheTTL), - UID: string(namespaceResponse.UID), - Attributes: namespaceResponse.Labels, - Annotations: namespaceResponse.Annotations, - } - k.namespaceCache.Store(namespace, cacheEntry) - - return cacheEntry, nil -} - -func (k *K8sMetadataDecorator) refreshPodMetadata(ctx context.Context, namespace, podName string) (MetadataCacheEntry, error) { - key := namespace + ":" + podName - - subCtx, cancel := context.WithTimeout(ctx, k.timeout) - defer cancel() - - // Query the API - podResponse, err := k.client.Pods(namespace).Get(subCtx, podName, metav1.GetOptions{}) - if err != nil { - // Add an empty entry to the cache so we don't continuously retry - cacheEntry := MetadataCacheEntry{ExpirationTime: time.Now().Add(10 * time.Second)} - k.podCache.Store(key, cacheEntry) - - return cacheEntry, errors.Wrap(err, "get pod metadata").WithDetails( - "namespace", namespace, - "pod_name", podName, - "retry_after", "10s", - ) - } - - // Create the cache entry - cacheEntry := MetadataCacheEntry{ - ClusterName: podResponse.ClusterName, - UID: string(podResponse.UID), - ExpirationTime: time.Now().Add(k.cacheTTL), - Attributes: podResponse.Labels, - Annotations: podResponse.Annotations, - AdditionalResourceValues: map[string]string{ - "k8s.replicaset.name": findNameOfKind(podResponse.OwnerReferences, "ReplicaSet"), - "k8s.daemonset.name": findNameOfKind(podResponse.OwnerReferences, "DaemonSet"), - "k8s.statefulset.name": findNameOfKind(podResponse.OwnerReferences, "StatefulSet"), - "k8s.job.name": findNameOfKind(podResponse.OwnerReferences, "Job"), - "k8s.replicationcontroller.name": findNameOfKind(podResponse.OwnerReferences, "ReplicationController"), - "k8s.service.name": findNameOfKind(podResponse.OwnerReferences, "ServiceName"), - }, - } - - // Add deployment if it exists - rsName := cacheEntry.AdditionalResourceValues["k8s.replicaset.name"] - if rsName != "" { - subCtx, cancel := context.WithTimeout(ctx, k.timeout) - defer cancel() - replicaSetResponse, err := k.appsClient.ReplicaSets(namespace).Get(subCtx, rsName, metav1.GetOptions{}) - if err != nil { - k.Errorw("Failed to get replica set metadata", "error", err) - } else { - cacheEntry.AdditionalResourceValues["k8s.deployment.name"] = findNameOfKind(replicaSetResponse.OwnerReferences, "Deployment") - } - } - - // Add cron job name if it exists - jobName := cacheEntry.AdditionalResourceValues["k8s.job.name"] - if jobName != "" { - subCtx, cancel := context.WithTimeout(ctx, k.timeout) - defer cancel() - replicaSetResponse, err := k.batchClient.Jobs(namespace).Get(subCtx, jobName, metav1.GetOptions{}) - if err != nil { - k.Errorw("Failed to get replica set metadata", "error", err) - } else { - cacheEntry.AdditionalResourceValues["k8s.cronjob.name"] = findNameOfKind(replicaSetResponse.OwnerReferences, "CronJob") - } - } - - k.podCache.Store(key, cacheEntry) - - return cacheEntry, nil -} - -func (k *K8sMetadataDecorator) decorateEntryWithNamespaceMetadata(nsMeta MetadataCacheEntry, entry *entry.Entry) { - if entry.Attributes == nil { - entry.Attributes = make(map[string]string) - } - - for k, v := range nsMeta.Annotations { - entry.Attributes["k8s-ns-annotation/"+k] = v - } - - for k, v := range nsMeta.Attributes { - entry.Attributes["k8s-ns/"+k] = v - } - - entry.Resource["k8s.namespace.uid"] = nsMeta.UID - if nsMeta.ClusterName != "" { - entry.Resource["k8s.cluster.name"] = nsMeta.ClusterName - } -} - -func (k *K8sMetadataDecorator) decorateEntryWithPodMetadata(podMeta MetadataCacheEntry, entry *entry.Entry) { - if entry.Attributes == nil { - entry.Attributes = make(map[string]string) - } - - for k, v := range podMeta.Annotations { - entry.Attributes["k8s-pod-annotation/"+k] = v - } - - for k, v := range podMeta.Attributes { - entry.Attributes["k8s-pod/"+k] = v - } - - entry.Resource["k8s.pod.uid"] = podMeta.UID - if podMeta.ClusterName != "" { - entry.Resource["k8s.cluster.name"] = podMeta.ClusterName - } - - for key, value := range podMeta.AdditionalResourceValues { - if value != "" { - entry.Resource[key] = value - } - } -} - -func findNameOfKind(ownerRefs []metav1.OwnerReference, kind string) string { - for _, ref := range ownerRefs { - if ref.Kind == kind { - return ref.Name - } - } - return "" -} diff --git a/operator/builtin/transformer/k8smetadata/k8s_metadata_decorator_test.go b/operator/builtin/transformer/k8smetadata/k8s_metadata_decorator_test.go deleted file mode 100644 index 340f3fe427c7..000000000000 --- a/operator/builtin/transformer/k8smetadata/k8s_metadata_decorator_test.go +++ /dev/null @@ -1,147 +0,0 @@ -// Copyright The OpenTelemetry Authors -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package k8smetadata - -import ( - "context" - "testing" - "time" - - "github.com/open-telemetry/opentelemetry-log-collection/entry" - "github.com/open-telemetry/opentelemetry-log-collection/operator" - "github.com/open-telemetry/opentelemetry-log-collection/operator/helper" - "github.com/open-telemetry/opentelemetry-log-collection/testutil" - "github.com/stretchr/testify/mock" - "github.com/stretchr/testify/require" -) - -func TestMetadataCache(t *testing.T) { - m := MetadataCache{} - entry := MetadataCacheEntry{ - Attributes: map[string]string{ - "label1": "value1", - }, - Annotations: map[string]string{ - "annotation2": "value2", - }, - } - - m.Store("testkey", entry) - loaded, ok := m.Load("testkey") - require.True(t, ok) - require.Equal(t, entry, loaded) -} - -func basicConfig() *K8sMetadataDecoratorConfig { - cfg := NewK8sMetadataDecoratorConfig("testoperator") - cfg.OutputIDs = []string{"mock"} - return cfg -} - -func TestK8sMetadataDecoratorBuildDefault(t *testing.T) { - cfg := basicConfig() - - expected := &K8sMetadataDecorator{ - TransformerOperator: helper.TransformerOperator{ - WriterOperator: helper.WriterOperator{ - BasicOperator: helper.BasicOperator{ - OperatorID: "$.testoperator", - OperatorType: "k8s_metadata_decorator", - }, - OutputIDs: []string{"$.mock"}, - }, - OnError: "send", - }, - podNameField: entry.NewResourceField("k8s.pod.name"), - namespaceField: entry.NewResourceField("k8s.namespace.name"), - cacheTTL: 10 * time.Minute, - timeout: 10 * time.Second, - allowProxy: false, - } - - ops, err := cfg.Build(testutil.NewBuildContext(t)) - require.NoError(t, err) - op := ops[0] - op.(*K8sMetadataDecorator).SugaredLogger = nil - require.Equal(t, expected, op) - -} - -func TestK8sMetadataDecoratorCachedMetadata(t *testing.T) { - - cfg := basicConfig() - ops, err := cfg.Build(testutil.NewBuildContext(t)) - require.NoError(t, err) - op := ops[0] - - mockOutput := testutil.NewMockOperator("mock") - op.SetOutputs([]operator.Operator{mockOutput}) - - // Preload cache so we don't hit the network - k8s := op.(*K8sMetadataDecorator) - k8s.namespaceCache.Store("testnamespace", MetadataCacheEntry{ - ExpirationTime: time.Now().Add(time.Hour), - Attributes: map[string]string{ - "label1": "lab1", - }, - ClusterName: "testcluster", - Annotations: map[string]string{ - "annotation1": "ann1", - }, - }) - - k8s.podCache.Store("testnamespace:testpodname", MetadataCacheEntry{ - ExpirationTime: time.Now().Add(time.Hour), - Attributes: map[string]string{ - "podlabel1": "podlab1", - }, - Annotations: map[string]string{ - "podannotation1": "podann1", - }, - AdditionalResourceValues: map[string]string{ - "k8s.service.name": "testservice", - }, - }) - - expected := entry.Entry{ - Attributes: map[string]string{ - "k8s-pod/podlabel1": "podlab1", - "k8s-ns/label1": "lab1", - "k8s-pod-annotation/podannotation1": "podann1", - "k8s-ns-annotation/annotation1": "ann1", - }, - Resource: map[string]string{ - "k8s.pod.name": "testpodname", - "k8s.namespace.name": "testnamespace", - "k8s.service.name": "testservice", - "k8s.cluster.name": "testcluster", - }, - } - - mockOutput.On("Process", mock.Anything, mock.Anything).Run(func(args mock.Arguments) { - entry := args.Get(1).(*entry.Entry) - require.Equal(t, expected.Attributes, entry.Attributes) - require.Equal(t, expected.Resource, entry.Resource) - }).Return(nil) - - e := &entry.Entry{ - Resource: map[string]string{ - "k8s.pod.name": "testpodname", - "k8s.namespace.name": "testnamespace", - }, - } - err = op.Process(context.Background(), e) - require.NoError(t, err) -} diff --git a/operator/builtin/transformer/ratelimit/rate_limit.go b/operator/builtin/transformer/ratelimit/rate_limit.go deleted file mode 100644 index 169072d1a094..000000000000 --- a/operator/builtin/transformer/ratelimit/rate_limit.go +++ /dev/null @@ -1,140 +0,0 @@ -// Copyright The OpenTelemetry Authors -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package ratelimit - -import ( - "context" - "fmt" - "sync" - "time" - - "github.com/open-telemetry/opentelemetry-log-collection/entry" - "github.com/open-telemetry/opentelemetry-log-collection/operator" - "github.com/open-telemetry/opentelemetry-log-collection/operator/helper" -) - -func init() { - operator.Register("rate_limit", func() operator.Builder { return NewRateLimitConfig("") }) -} - -// NewRateLimitConfig creates a new rate limit config with default values -func NewRateLimitConfig(operatorID string) *RateLimitConfig { - return &RateLimitConfig{ - TransformerConfig: helper.NewTransformerConfig(operatorID, "rate_limit"), - } -} - -// RateLimitConfig is the configuration of a rate filter operator. -type RateLimitConfig struct { - helper.TransformerConfig `yaml:",inline"` - - Rate float64 `json:"rate,omitempty" yaml:"rate,omitempty"` - Interval helper.Duration `json:"interval,omitempty" yaml:"interval,omitempty"` - Burst uint `json:"burst,omitempty" yaml:"burst,omitempty"` -} - -// Build will build a rate limit operator. -func (c RateLimitConfig) Build(context operator.BuildContext) ([]operator.Operator, error) { - transformerOperator, err := c.TransformerConfig.Build(context) - if err != nil { - return nil, err - } - - var interval time.Duration - switch { - case c.Rate != 0 && c.Interval.Raw() != 0: - return nil, fmt.Errorf("only one of 'rate' or 'interval' can be defined") - case c.Rate < 0 || c.Interval.Raw() < 0: - return nil, fmt.Errorf("rate and interval must be greater than zero") - case c.Rate > 0: - interval = time.Second / time.Duration(c.Rate) - default: - interval = c.Interval.Raw() - } - - rateLimitOperator := &RateLimitOperator{ - TransformerOperator: transformerOperator, - interval: interval, - burst: c.Burst, - } - - return []operator.Operator{rateLimitOperator}, nil -} - -// RateLimitOperator is an operator that limits the rate of log consumption between operators. -type RateLimitOperator struct { - helper.TransformerOperator - - interval time.Duration - burst uint - isReady chan struct{} - cancel context.CancelFunc - wg sync.WaitGroup -} - -// Process will wait until a rate is met before sending an entry to the output. -func (p *RateLimitOperator) Process(ctx context.Context, entry *entry.Entry) error { - select { - case <-p.isReady: - p.Write(ctx, entry) - return nil - case <-ctx.Done(): - return nil - } -} - -// Start will start the rate limit operator. -func (p *RateLimitOperator) Start() error { - p.isReady = make(chan struct{}, p.burst) - ticker := time.NewTicker(p.interval) - - ctx, cancel := context.WithCancel(context.Background()) - p.cancel = cancel - - // Buffer the ticker ticks in isReady to allow bursts - p.wg.Add(1) - go func() { - defer p.wg.Done() - defer ticker.Stop() - defer close(p.isReady) - - for { - select { - case <-ticker.C: - p.increment(ctx) - case <-ctx.Done(): - return - } - } - }() - - return nil -} - -func (p *RateLimitOperator) increment(ctx context.Context) { - select { - case p.isReady <- struct{}{}: - return - case <-ctx.Done(): - return - } -} - -// Stop will stop the rate limit operator. -func (p *RateLimitOperator) Stop() error { - p.cancel() - p.wg.Wait() - return nil -} diff --git a/operator/builtin/transformer/ratelimit/rate_limit_test.go b/operator/builtin/transformer/ratelimit/rate_limit_test.go deleted file mode 100644 index f83cdfdd2aa1..000000000000 --- a/operator/builtin/transformer/ratelimit/rate_limit_test.go +++ /dev/null @@ -1,84 +0,0 @@ -// Copyright The OpenTelemetry Authors -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package ratelimit - -import ( - "context" - "runtime" - "sync" - "testing" - "time" - - "github.com/open-telemetry/opentelemetry-log-collection/entry" - "github.com/open-telemetry/opentelemetry-log-collection/operator" - "github.com/open-telemetry/opentelemetry-log-collection/testutil" - "github.com/stretchr/testify/require" -) - -func TestRateLimit(t *testing.T) { - cfg := NewRateLimitConfig("my_rate_limit") - cfg.OutputIDs = []string{"fake"} - cfg.Burst = 1 - cfg.Rate = 100 - - ops, err := cfg.Build(testutil.NewBuildContext(t)) - require.NoError(t, err) - op := ops[0] - - fake := testutil.NewFakeOutput(t) - - err = op.SetOutputs([]operator.Operator{fake}) - require.NoError(t, err) - - err = op.Start() - defer op.Stop() - require.NoError(t, err) - - var wg sync.WaitGroup - wg.Add(1) - go func() { - defer wg.Done() - for { - _, ok := <-fake.Received - if !ok { - return - } - } - }() - - // Warm up - for i := 0; i < 100; i++ { - err := op.Process(context.Background(), entry.New()) - require.NoError(t, err) - } - - // Measure - start := time.Now() - for i := 0; i < 500; i++ { - err := op.Process(context.Background(), entry.New()) - require.NoError(t, err) - } - elapsed := time.Since(start) - - close(fake.Received) - wg.Wait() - - if runtime.GOOS == "darwin" { - t.Log("Using a wider acceptable range on darwin because of slow CI servers") - require.InEpsilon(t, elapsed.Nanoseconds(), 5*time.Second.Nanoseconds(), 0.6) - } else { - require.InEpsilon(t, elapsed.Nanoseconds(), 5*time.Second.Nanoseconds(), 0.4) - } -} diff --git a/operator/flusher/flusher.go b/operator/flusher/flusher.go deleted file mode 100644 index dc59ad2d3b36..000000000000 --- a/operator/flusher/flusher.go +++ /dev/null @@ -1,155 +0,0 @@ -// Copyright The OpenTelemetry Authors -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package flusher - -import ( - "context" - "sync" - "sync/atomic" - "time" - - backoff "github.com/cenkalti/backoff/v4" - "go.uber.org/zap" - "golang.org/x/sync/semaphore" -) - -// These are vars so they can be overridden in tests -var maxRetryInterval = time.Minute -var maxElapsedTime = time.Hour - -// Config holds the configuration to build a new flusher -type Config struct { - // MaxConcurrent is the maximum number of goroutines flushing entries concurrently. - // Defaults to 16. - MaxConcurrent int `json:"max_concurrent" yaml:"max_concurrent"` - - // TODO configurable retry -} - -// NewConfig creates a new default flusher config -func NewConfig() Config { - return Config{ - MaxConcurrent: 16, - } -} - -// Build uses a Config to build a new Flusher -func (c *Config) Build(logger *zap.SugaredLogger) *Flusher { - maxConcurrent := c.MaxConcurrent - if maxConcurrent == 0 { - maxConcurrent = 16 - } - - ctx, cancel := context.WithCancel(context.Background()) - - return &Flusher{ - ctx: ctx, - cancel: cancel, - sem: semaphore.NewWeighted(int64(maxConcurrent)), - SugaredLogger: logger, - } -} - -// Flusher is used to flush entries from a buffer concurrently. It handles max concurrency, -// retry behavior, and cancellation. -type Flusher struct { - ctx context.Context - cancel context.CancelFunc - sem *semaphore.Weighted - wg sync.WaitGroup - chunkIDCounter uint64 - *zap.SugaredLogger -} - -// FlushFunc is any function that flushes -type FlushFunc func(context.Context) error - -// Do executes the flusher function in a goroutine -func (f *Flusher) Do(flush FlushFunc) { - // Wait until we have free flusher goroutines - if err := f.sem.Acquire(f.ctx, 1); err != nil { - // Context cancelled - return - } - - // Start a new flusher goroutine - f.wg.Add(1) - go func() { - defer f.wg.Done() - defer f.sem.Release(1) - f.flushWithRetry(f.ctx, flush) - }() -} - -// Stop cancels all the in-progress flushers and waits until they have returned -func (f *Flusher) Stop() { - f.cancel() - f.wg.Wait() -} - -// flushWithRetry will continue trying to call flushFunc with the entries passed -// in until either flushFunc returns no error or the context is cancelled. It will only -// return an error in the case that the context was cancelled. If no error was returned, -// it is safe to mark the entries in the buffer as flushed. -func (f *Flusher) flushWithRetry(ctx context.Context, flush FlushFunc) { - chunkID := f.nextChunkID() - b := newExponentialBackoff() - for { - err := flush(ctx) - if err == nil { - return - } - - waitTime := b.NextBackOff() - if waitTime == b.Stop { - f.Errorw("Reached max backoff time during chunk flush retry. Dropping logs in chunk", "chunk_id", chunkID) - return - } - - // Only log the error if the context hasn't been canceled - // This protects from flooding the logs with "context canceled" messages on clean shutdown - select { - case <-ctx.Done(): - return - default: - f.Warnw("Failed flushing chunk. Waiting before retry", "error", err, "wait_time", waitTime) - } - - select { - case <-ctx.Done(): - return - case <-time.After(waitTime): - } - } -} - -func (f *Flusher) nextChunkID() uint64 { - return atomic.AddUint64(&f.chunkIDCounter, 1) -} - -// newExponentialBackoff returns a default ExponentialBackOff -func newExponentialBackoff() *backoff.ExponentialBackOff { - b := &backoff.ExponentialBackOff{ - InitialInterval: 50 * time.Millisecond, - RandomizationFactor: backoff.DefaultRandomizationFactor, - Multiplier: backoff.DefaultMultiplier, - MaxInterval: maxRetryInterval, - MaxElapsedTime: maxElapsedTime, - Stop: backoff.Stop, - Clock: backoff.SystemClock, - } - b.Reset() - return b -} diff --git a/operator/flusher/flusher_test.go b/operator/flusher/flusher_test.go deleted file mode 100644 index a4ff71abfe7a..000000000000 --- a/operator/flusher/flusher_test.go +++ /dev/null @@ -1,69 +0,0 @@ -// Copyright The OpenTelemetry Authors -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package flusher - -import ( - "context" - "errors" - "math/rand" - "testing" - "time" - - "github.com/stretchr/testify/require" - "go.uber.org/zap/zaptest" -) - -func TestFlusher(t *testing.T) { - // Override setting for test - maxElapsedTime = 5 * time.Second - - outChan := make(chan struct{}, 100) - flusherCfg := NewConfig() - flusher := flusherCfg.Build(zaptest.NewLogger(t).Sugar()) - - failed := errors.New("test failure") - for i := 0; i < 100; i++ { - flusher.Do(func(_ context.Context) error { - // Fail randomly but still expect the entries to come through - if rand.Int()%5 == 0 { - return failed - } - outChan <- struct{}{} - return nil - }) - } - - for i := 0; i < 100; i++ { - select { - case <-time.After(5 * time.Second): - require.FailNow(t, "timed out") - case <-outChan: - } - } -} - -func TestMaxElapsedTime(t *testing.T) { - // Override setting for test - maxElapsedTime = 100 * time.Millisecond - - flusherCfg := NewConfig() - flusher := flusherCfg.Build(zaptest.NewLogger(t).Sugar()) - - start := time.Now() - flusher.flushWithRetry(context.Background(), func(_ context.Context) error { - return errors.New("never flushes") - }) - require.WithinDuration(t, start.Add(maxElapsedTime), time.Now(), maxElapsedTime) -}