diff --git a/.chloggen/extension-memory-limiter.yaml b/.chloggen/extension-memory-limiter.yaml new file mode 100644 index 00000000000..628a7d7d846 --- /dev/null +++ b/.chloggen/extension-memory-limiter.yaml @@ -0,0 +1,25 @@ +# Use this changelog template to create an entry for release notes. + +# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix' +change_type: new_component + +# The name of the component, or a single word describing the area of concern, (e.g. otlpreceiver) +component: extension/memory_limiter + +# A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`). +note: Introduce a `memory_limiter` extension which receivers can use to reject incoming requests when collector doesn't have enough memory + +# One or more tracking issues or pull requests related to the change +issues: [8632] + +# (Optional) One or more lines of additional information to render under the primary note. +# These lines will be padded with 2 spaces and then inserted directly into the document. +# Use pipe (|) for multiline entries. +subtext: The extension has the same configuration interface and behavior as the existing `memory_limiter` processor, which potentially can be deprecated and removed in the future + +# Optional: The change log or logs in which this entry should be included. +# e.g. '[user]' or '[user, api]' +# Include 'user' if the change is relevant to end users. +# Include 'api' if there is a change to a library API. +# Default: '[user]' +change_logs: [] \ No newline at end of file diff --git a/cmd/otelcorecol/builder-config.yaml b/cmd/otelcorecol/builder-config.yaml index 91e8fd19817..355b08b7a55 100644 --- a/cmd/otelcorecol/builder-config.yaml +++ b/cmd/otelcorecol/builder-config.yaml @@ -14,6 +14,7 @@ exporters: - gomod: go.opentelemetry.io/collector/exporter/otlphttpexporter v0.92.0 extensions: - gomod: go.opentelemetry.io/collector/extension/ballastextension v0.92.0 + - gomod: go.opentelemetry.io/collector/extension/memorylimiterextension v0.92.0 - gomod: go.opentelemetry.io/collector/extension/zpagesextension v0.92.0 processors: - gomod: go.opentelemetry.io/collector/processor/batchprocessor v0.92.0 @@ -47,6 +48,7 @@ replaces: - go.opentelemetry.io/collector/extension => ../../extension - go.opentelemetry.io/collector/extension/auth => ../../extension/auth - go.opentelemetry.io/collector/extension/ballastextension => ../../extension/ballastextension + - go.opentelemetry.io/collector/extension/memorylimiterextension => ../../extension/memorylimiterextension - go.opentelemetry.io/collector/extension/zpagesextension => ../../extension/zpagesextension - go.opentelemetry.io/collector/featuregate => ../../featuregate - go.opentelemetry.io/collector/pdata => ../../pdata diff --git a/cmd/otelcorecol/components.go b/cmd/otelcorecol/components.go index 170c7b55b5b..786743099b9 100644 --- a/cmd/otelcorecol/components.go +++ b/cmd/otelcorecol/components.go @@ -12,6 +12,7 @@ import ( otlphttpexporter "go.opentelemetry.io/collector/exporter/otlphttpexporter" "go.opentelemetry.io/collector/extension" ballastextension "go.opentelemetry.io/collector/extension/ballastextension" + memorylimiterextension "go.opentelemetry.io/collector/extension/memorylimiterextension" zpagesextension "go.opentelemetry.io/collector/extension/zpagesextension" "go.opentelemetry.io/collector/otelcol" "go.opentelemetry.io/collector/processor" @@ -27,6 +28,7 @@ func components() (otelcol.Factories, error) { factories.Extensions, err = extension.MakeFactoryMap( ballastextension.NewFactory(), + memorylimiterextension.NewFactory(), zpagesextension.NewFactory(), ) if err != nil { diff --git a/cmd/otelcorecol/go.mod b/cmd/otelcorecol/go.mod index 0679fc537e6..32ffdbd9456 100644 --- a/cmd/otelcorecol/go.mod +++ b/cmd/otelcorecol/go.mod @@ -16,6 +16,7 @@ require ( go.opentelemetry.io/collector/exporter/otlphttpexporter v0.92.0 go.opentelemetry.io/collector/extension v0.92.0 go.opentelemetry.io/collector/extension/ballastextension v0.92.0 + go.opentelemetry.io/collector/extension/memorylimiterextension v0.92.0 go.opentelemetry.io/collector/extension/zpagesextension v0.92.0 go.opentelemetry.io/collector/otelcol v0.92.0 go.opentelemetry.io/collector/processor v0.92.0 @@ -178,6 +179,8 @@ replace go.opentelemetry.io/collector/extension/auth => ../../extension/auth replace go.opentelemetry.io/collector/extension/ballastextension => ../../extension/ballastextension +replace go.opentelemetry.io/collector/extension/memorylimiterextension => ../../extension/memorylimiterextension + replace go.opentelemetry.io/collector/extension/zpagesextension => ../../extension/zpagesextension replace go.opentelemetry.io/collector/featuregate => ../../featuregate diff --git a/extension/memorylimiterextension/Makefile b/extension/memorylimiterextension/Makefile new file mode 100644 index 00000000000..ded7a36092d --- /dev/null +++ b/extension/memorylimiterextension/Makefile @@ -0,0 +1 @@ +include ../../Makefile.Common diff --git a/extension/memorylimiterextension/README.md b/extension/memorylimiterextension/README.md new file mode 100644 index 00000000000..90f19a78a07 --- /dev/null +++ b/extension/memorylimiterextension/README.md @@ -0,0 +1,22 @@ +# Memory Limiter Extension + +> [!WARNING] +> The memory_limiter extension cannot be used if the deprecated memory_ballast extension is enabled. + + +| Status | | +| ------------- |-----------| +| Stability | [development] | +| Distributions | [] | +| Issues | [![Open issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aopen%20label%3Aextension%2Fmemorylimiter%20&label=open&color=orange&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aopen+is%3Aissue+label%3Aextension%2Fmemorylimiter) [![Closed issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aclosed%20label%3Aextension%2Fmemorylimiter%20&label=closed&color=blue&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aclosed+is%3Aissue+label%3Aextension%2Fmemorylimiter) | + +[development]: https://github.com/open-telemetry/opentelemetry-collector#development + + +The memory limiter extension is used to prevent out of memory situations on +the collector. The extension will potentially replace the Memory Limiter Processor. +It provides better guarantees from running out of memory as it will be used by the +receivers to reject requests before converting them into OTLP. All the configurations +are the same as Memory Limiter Processor. The extension is under development and does nothing. + +see [memorylimiterprocessor](../../processor/memorylimiterprocessor/README.md) for additional details diff --git a/extension/memorylimiterextension/config.go b/extension/memorylimiterextension/config.go new file mode 100644 index 00000000000..1e5df4fe813 --- /dev/null +++ b/extension/memorylimiterextension/config.go @@ -0,0 +1,10 @@ +// Copyright The OpenTelemetry Authors +// SPDX-License-Identifier: Apache-2.0 + +package memorylimiterextension // import "go.opentelemetry.io/collector/extension/memorylimiterextension" + +import ( + "go.opentelemetry.io/collector/internal/memorylimiter" +) + +type Config = memorylimiter.Config diff --git a/extension/memorylimiterextension/factory.go b/extension/memorylimiterextension/factory.go new file mode 100644 index 00000000000..55b8efec5ea --- /dev/null +++ b/extension/memorylimiterextension/factory.go @@ -0,0 +1,33 @@ +// Copyright The OpenTelemetry Authors +// SPDX-License-Identifier: Apache-2.0 + +package memorylimiterextension // import "go.opentelemetry.io/collector/extension/memorylimiterextension" + +//go:generate mdatagen metadata.yaml + +import ( + "context" + + "go.opentelemetry.io/collector/component" + "go.opentelemetry.io/collector/extension" + "go.opentelemetry.io/collector/extension/memorylimiterextension/internal/metadata" +) + +// NewFactory returns a new factory for the Memory Limiter extension. +func NewFactory() extension.Factory { + return extension.NewFactory( + metadata.Type, + createDefaultConfig, + createExtension, + metadata.ExtensionStability) +} + +// CreateDefaultConfig creates the default configuration for extension. Notice +// that the default configuration is expected to fail for this extension. +func createDefaultConfig() component.Config { + return &Config{} +} + +func createExtension(_ context.Context, set extension.CreateSettings, cfg component.Config) (extension.Extension, error) { + return newMemoryLimiter(cfg.(*Config), set.TelemetrySettings.Logger) +} diff --git a/extension/memorylimiterextension/factory_test.go b/extension/memorylimiterextension/factory_test.go new file mode 100644 index 00000000000..21bae72ee6d --- /dev/null +++ b/extension/memorylimiterextension/factory_test.go @@ -0,0 +1,50 @@ +// Copyright The OpenTelemetry Authors +// SPDX-License-Identifier: Apache-2.0 + +package memorylimiterextension + +import ( + "context" + "testing" + "time" + + "github.com/stretchr/testify/assert" + "github.com/stretchr/testify/require" + + "go.opentelemetry.io/collector/component/componenttest" + "go.opentelemetry.io/collector/extension/extensiontest" + "go.opentelemetry.io/collector/internal/memorylimiter" +) + +func TestCreateDefaultConfig(t *testing.T) { + factory := NewFactory() + require.NotNil(t, factory) + + cfg := factory.CreateDefaultConfig() + assert.NotNil(t, cfg, "failed to create default config") + assert.NoError(t, componenttest.CheckConfigStruct(cfg)) +} + +func TestCreateExtension(t *testing.T) { + factory := NewFactory() + require.NotNil(t, factory) + + cfg := factory.CreateDefaultConfig() + + // Create extension with a valid config. + pCfg := cfg.(*Config) + pCfg.MemoryLimitMiB = 5722 + pCfg.MemorySpikeLimitMiB = 1907 + pCfg.CheckInterval = 100 * time.Millisecond + + tp, err := factory.CreateExtension(context.Background(), extensiontest.NewNopCreateSettings(), cfg) + assert.NoError(t, err) + assert.NotNil(t, tp) + // test if we can shutdown a monitoring routine that has not started + assert.ErrorIs(t, tp.Shutdown(context.Background()), memorylimiter.ErrShutdownNotStarted) + assert.NoError(t, tp.Start(context.Background(), componenttest.NewNopHost())) + + assert.NoError(t, tp.Shutdown(context.Background())) + // verify that no monitoring routine is running + assert.ErrorIs(t, tp.Shutdown(context.Background()), memorylimiter.ErrShutdownNotStarted) +} diff --git a/extension/memorylimiterextension/go.mod b/extension/memorylimiterextension/go.mod new file mode 100644 index 00000000000..8e6b68339b7 --- /dev/null +++ b/extension/memorylimiterextension/go.mod @@ -0,0 +1,81 @@ +module go.opentelemetry.io/collector/extension/memorylimiterextension + +go 1.20 + +require ( + github.com/stretchr/testify v1.8.4 + go.opentelemetry.io/collector v0.92.0 + go.opentelemetry.io/collector/component v0.92.0 + go.opentelemetry.io/collector/extension v0.92.0 + go.opentelemetry.io/otel/metric v1.22.0 + go.opentelemetry.io/otel/trace v1.22.0 + go.uber.org/zap v1.26.0 +) + +require ( + contrib.go.opencensus.io/exporter/prometheus v0.4.2 // indirect + github.com/beorn7/perks v1.0.1 // indirect + github.com/cespare/xxhash/v2 v2.2.0 // indirect + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/go-kit/log v0.2.1 // indirect + github.com/go-logfmt/logfmt v0.5.1 // indirect + github.com/go-logr/logr v1.4.1 // indirect + github.com/go-logr/stdr v1.2.2 // indirect + github.com/go-ole/go-ole v1.2.6 // indirect + github.com/gogo/protobuf v1.3.2 // indirect + github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect + github.com/golang/protobuf v1.5.3 // indirect + github.com/hashicorp/go-version v1.6.0 // indirect + github.com/knadh/koanf/maps v0.1.1 // indirect + github.com/knadh/koanf/providers/confmap v0.1.0 // indirect + github.com/knadh/koanf/v2 v2.0.1 // indirect + github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0 // indirect + github.com/mitchellh/copystructure v1.2.0 // indirect + github.com/mitchellh/mapstructure v1.5.1-0.20231216201459-8508981c8b6c // indirect + github.com/mitchellh/reflectwalk v1.0.2 // indirect + github.com/pmezard/go-difflib v1.0.0 // indirect + github.com/power-devops/perfstat v0.0.0-20210106213030-5aafc221ea8c // indirect + github.com/prometheus/client_golang v1.18.0 // indirect + github.com/prometheus/client_model v0.5.0 // indirect + github.com/prometheus/common v0.46.0 // indirect + github.com/prometheus/procfs v0.12.0 // indirect + github.com/prometheus/statsd_exporter v0.22.7 // indirect + github.com/shirou/gopsutil/v3 v3.23.12 // indirect + github.com/tklauser/go-sysconf v0.3.12 // indirect + github.com/tklauser/numcpus v0.6.1 // indirect + github.com/yusufpapurcu/wmi v1.2.3 // indirect + go.opencensus.io v0.24.0 // indirect + go.opentelemetry.io/collector/config/configtelemetry v0.92.0 // indirect + go.opentelemetry.io/collector/confmap v0.92.0 // indirect + go.opentelemetry.io/collector/featuregate v1.0.1 // indirect + go.opentelemetry.io/collector/pdata v1.0.1 // indirect + go.opentelemetry.io/otel v1.22.0 // indirect + go.opentelemetry.io/otel/exporters/prometheus v0.44.1-0.20231201153405-6027c1ae76f2 // indirect + go.opentelemetry.io/otel/sdk v1.22.0 // indirect + go.opentelemetry.io/otel/sdk/metric v1.22.0 // indirect + go.uber.org/multierr v1.11.0 // indirect + golang.org/x/net v0.20.0 // indirect + golang.org/x/sys v0.16.0 // indirect + golang.org/x/text v0.14.0 // indirect + google.golang.org/genproto/googleapis/rpc v0.0.0-20231002182017-d307bd883b97 // indirect + google.golang.org/grpc v1.60.1 // indirect + google.golang.org/protobuf v1.32.0 // indirect + gopkg.in/yaml.v2 v2.4.0 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect +) + +replace go.opentelemetry.io/collector => ../../ + +replace go.opentelemetry.io/collector/component => ../../component + +replace go.opentelemetry.io/collector/confmap => ../../confmap + +replace go.opentelemetry.io/collector/extension => ../../extension + +replace go.opentelemetry.io/collector/featuregate => ../../featuregate + +replace go.opentelemetry.io/collector/pdata => ../../pdata + +replace go.opentelemetry.io/collector/consumer => ../../consumer + +replace go.opentelemetry.io/collector/config/configtelemetry => ../../config/configtelemetry diff --git a/extension/memorylimiterextension/go.sum b/extension/memorylimiterextension/go.sum new file mode 100644 index 00000000000..01da35f4ca5 --- /dev/null +++ b/extension/memorylimiterextension/go.sum @@ -0,0 +1,602 @@ +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 v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To= +cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4= +cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M= +cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc= +cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk= +cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs= +cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc= +cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY= +cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o= +cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE= +cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc= +cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg= +cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc= +cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ= +cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE= +cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk= +cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I= +cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw= +cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA= +cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU= +cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw= +cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos= +cloud.google.com/go/storage 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DO NOT EDIT. + +package metadata + +import ( + "go.opentelemetry.io/otel/metric" + "go.opentelemetry.io/otel/trace" + + "go.opentelemetry.io/collector/component" +) + +const ( + Type = "memory_limiter" + ExtensionStability = component.StabilityLevelDevelopment +) + +func Meter(settings component.TelemetrySettings) metric.Meter { + return settings.MeterProvider.Meter("otelcol/memorylimiter") +} + +func Tracer(settings component.TelemetrySettings) trace.Tracer { + return settings.TracerProvider.Tracer("otelcol/memorylimiter") +} diff --git a/extension/memorylimiterextension/memorylimiter.go b/extension/memorylimiterextension/memorylimiter.go new file mode 100644 index 00000000000..4986243ce10 --- /dev/null +++ b/extension/memorylimiterextension/memorylimiter.go @@ -0,0 +1,40 @@ +// Copyright The OpenTelemetry Authors +// SPDX-License-Identifier: Apache-2.0 + +package memorylimiterextension // import "go.opentelemetry.io/collector/extension/memorylimiterextension" + +import ( + "context" + + "go.uber.org/zap" + + "go.opentelemetry.io/collector/component" + "go.opentelemetry.io/collector/internal/memorylimiter" +) + +type memoryLimiterExtension struct { + memLimiter *memorylimiter.MemoryLimiter +} + +// newMemoryLimiter returns a new memorylimiter extension. +func newMemoryLimiter(cfg *Config, logger *zap.Logger) (*memoryLimiterExtension, error) { + ml, err := memorylimiter.NewMemoryLimiter(cfg, logger) + if err != nil { + return nil, err + } + + return &memoryLimiterExtension{memLimiter: ml}, nil +} + +func (ml *memoryLimiterExtension) Start(ctx context.Context, host component.Host) error { + return ml.memLimiter.Start(ctx, host) +} + +func (ml *memoryLimiterExtension) Shutdown(ctx context.Context) error { + return ml.memLimiter.Shutdown(ctx) +} + +// MustRefuse returns if the caller should deny because memory has reached it's configured limits +func (ml *memoryLimiterExtension) MustRefuse() bool { + return ml.memLimiter.MustRefuse() +} diff --git a/extension/memorylimiterextension/memorylimiter_test.go b/extension/memorylimiterextension/memorylimiter_test.go new file mode 100644 index 00000000000..2a63a497b08 --- /dev/null +++ b/extension/memorylimiterextension/memorylimiter_test.go @@ -0,0 +1,106 @@ +// Copyright The OpenTelemetry Authors +// SPDX-License-Identifier: Apache-2.0 + +package memorylimiterextension + +import ( + "context" + "runtime" + "testing" + "time" + + "github.com/stretchr/testify/assert" + "go.uber.org/zap" + + "go.opentelemetry.io/collector/component" + "go.opentelemetry.io/collector/internal/iruntime" + "go.opentelemetry.io/collector/internal/memorylimiter" +) + +func TestMemoryPressureResponse(t *testing.T) { + ctx := context.Background() + + tests := []struct { + name string + mlCfg *Config + memAlloc uint64 + expectError bool + }{ + { + name: "Below memAllocLimit", + mlCfg: &Config{ + CheckInterval: time.Second, + MemoryLimitPercentage: 50, + MemorySpikePercentage: 1, + }, + memAlloc: 800, + expectError: false, + }, + { + name: "Above memAllocLimit", + mlCfg: &Config{ + CheckInterval: time.Second, + MemoryLimitPercentage: 50, + MemorySpikePercentage: 1, + }, + memAlloc: 1800, + expectError: true, + }, + { + name: "Below memSpikeLimit", + mlCfg: &Config{ + CheckInterval: time.Second, + MemoryLimitPercentage: 50, + MemorySpikePercentage: 10, + }, + memAlloc: 800, + expectError: false, + }, + { + name: "Above memSpikeLimit", + mlCfg: &Config{ + CheckInterval: time.Second, + MemoryLimitPercentage: 50, + MemorySpikePercentage: 11, + }, + memAlloc: 800, + expectError: true, + }, + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + memorylimiter.GetMemoryFn = totalMemory + memorylimiter.ReadMemStatsFn = func(ms *runtime.MemStats) { + ms.Alloc = tt.memAlloc + } + ml, err := newMemoryLimiter(tt.mlCfg, zap.NewNop()) + assert.NoError(t, err) + + assert.NoError(t, ml.Start(ctx, &mockHost{})) + ml.memLimiter.CheckMemLimits() + mustRefuse := ml.MustRefuse() + if tt.expectError { + assert.True(t, mustRefuse) + } else { + assert.NoError(t, err) + } + assert.NoError(t, ml.Shutdown(ctx)) + }) + } + t.Cleanup(func() { + memorylimiter.GetMemoryFn = iruntime.TotalMemory + memorylimiter.ReadMemStatsFn = runtime.ReadMemStats + }) +} + +type mockHost struct { + component.Host +} + +func (h *mockHost) GetExtensions() map[component.ID]component.Component { + return make(map[component.ID]component.Component) +} + +func totalMemory() (uint64, error) { + return uint64(2048), nil +} diff --git a/extension/memorylimiterextension/metadata.yaml b/extension/memorylimiterextension/metadata.yaml new file mode 100644 index 00000000000..75f16b8f750 --- /dev/null +++ b/extension/memorylimiterextension/metadata.yaml @@ -0,0 +1,7 @@ +type: memory_limiter + +status: + class: extension + stability: + development: [extension] + distributions: [] diff --git a/extension/memorylimiterextension/testdata/config.yaml b/extension/memorylimiterextension/testdata/config.yaml new file mode 100644 index 00000000000..4aa0385c000 --- /dev/null +++ b/extension/memorylimiterextension/testdata/config.yaml @@ -0,0 +1,19 @@ +# check_interval is the time between measurements of memory usage for the +# purposes of avoiding going over the limits. Defaults to zero, so no +# checks will be performed. Values below 1 second are not recommended since +# it can result in unnecessary CPU consumption. +check_interval: 5s + +# Maximum amount of memory, in MiB, targeted to be allocated by the process heap. +# Note that typically the total memory usage of process will be about 50MiB higher +# than this value. +limit_mib: 4000 + +# The maximum, in MiB, spike expected between the measurements of memory usage. +spike_limit_mib: 500 + +# the maximum amount of memory, in %, targeted to be allocated by the process +limit_percentage: 0 + +# the maximum, in percents against the total memory, spike expected between the measurements of memory usage. +spike_limit_percentage: 0 \ No newline at end of file diff --git a/go.mod b/go.mod index 7a6882b88ef..31bb9574674 100644 --- a/go.mod +++ b/go.mod @@ -6,12 +6,14 @@ require ( github.com/shirou/gopsutil/v3 v3.23.12 github.com/stretchr/testify v1.8.4 go.opentelemetry.io/collector/component v0.92.0 + go.opentelemetry.io/collector/confmap v0.92.0 go.opentelemetry.io/collector/consumer v0.92.0 go.opentelemetry.io/collector/featuregate v1.0.1 go.opentelemetry.io/collector/pdata v1.0.1 go.opentelemetry.io/contrib/config v0.2.0 go.uber.org/goleak v1.3.0 go.uber.org/multierr v1.11.0 + go.uber.org/zap v1.26.0 ) require ( @@ -52,7 +54,6 @@ require ( github.com/yusufpapurcu/wmi v1.2.3 // indirect go.opencensus.io v0.24.0 // indirect go.opentelemetry.io/collector/config/configtelemetry v0.92.0 // indirect - go.opentelemetry.io/collector/confmap v0.92.0 // indirect go.opentelemetry.io/otel v1.22.0 // indirect go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.22.0 // indirect go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.22.0 // indirect @@ -64,7 +65,6 @@ require ( go.opentelemetry.io/otel/sdk/metric v1.22.0 // indirect go.opentelemetry.io/otel/trace v1.22.0 // indirect go.opentelemetry.io/proto/otlp v1.0.0 // indirect - go.uber.org/zap v1.26.0 // indirect golang.org/x/net v0.20.0 // indirect golang.org/x/sys v0.16.0 // indirect golang.org/x/text v0.14.0 // indirect diff --git a/internal/memorylimiter/config.go b/internal/memorylimiter/config.go new file mode 100644 index 00000000000..bb20ad6565a --- /dev/null +++ b/internal/memorylimiter/config.go @@ -0,0 +1,66 @@ +// Copyright The OpenTelemetry Authors +// SPDX-License-Identifier: Apache-2.0 + +package memorylimiter // import "go.opentelemetry.io/collector/internal/memorylimiter" + +import ( + "errors" + "time" + + "go.opentelemetry.io/collector/component" +) + +var ( + errCheckIntervalOutOfRange = errors.New("'check_interval' must be greater than zero") + errLimitOutOfRange = errors.New("'limit_mib' or 'limit_percentage' must be greater than zero") + errSpikeLimitOutOfRange = errors.New("'spike_limit_mib' must be smaller than 'limit_mib'") + errSpikeLimitPercentageOutOfRange = errors.New("'spike_limit_percentage' must be smaller than 'limit_percentage'") + errLimitPercentageOutOfRange = errors.New( + "'limit_percentage' and 'spike_limit_percentage' must be greater than zero and less than or equal to hundred") +) + +// Config defines configuration for memory memoryLimiter processor. +type Config struct { + // CheckInterval is the time between measurements of memory usage for the + // purposes of avoiding going over the limits. Defaults to zero, so no + // checks will be performed. + CheckInterval time.Duration `mapstructure:"check_interval"` + + // MemoryLimitMiB is the maximum amount of memory, in MiB, targeted to be + // allocated by the process. + MemoryLimitMiB uint32 `mapstructure:"limit_mib"` + + // MemorySpikeLimitMiB is the maximum, in MiB, spike expected between the + // measurements of memory usage. + MemorySpikeLimitMiB uint32 `mapstructure:"spike_limit_mib"` + + // MemoryLimitPercentage is the maximum amount of memory, in %, targeted to be + // allocated by the process. The fixed memory settings MemoryLimitMiB has a higher precedence. + MemoryLimitPercentage uint32 `mapstructure:"limit_percentage"` + + // MemorySpikePercentage is the maximum, in percents against the total memory, + // spike expected between the measurements of memory usage. + MemorySpikePercentage uint32 `mapstructure:"spike_limit_percentage"` +} + +var _ component.Config = (*Config)(nil) + +// Validate checks if the processor configuration is valid +func (cfg *Config) Validate() error { + if cfg.CheckInterval <= 0 { + return errCheckIntervalOutOfRange + } + if cfg.MemoryLimitMiB == 0 && cfg.MemoryLimitPercentage == 0 { + return errLimitOutOfRange + } + if cfg.MemoryLimitPercentage > 100 || cfg.MemorySpikePercentage > 100 { + return errLimitPercentageOutOfRange + } + if cfg.MemoryLimitMiB > 0 && cfg.MemoryLimitMiB <= cfg.MemorySpikeLimitMiB { + return errSpikeLimitOutOfRange + } + if cfg.MemoryLimitPercentage > 0 && cfg.MemoryLimitPercentage <= cfg.MemorySpikePercentage { + return errSpikeLimitPercentageOutOfRange + } + return nil +} diff --git a/processor/memorylimiterprocessor/config_test.go b/internal/memorylimiter/config_test.go similarity index 76% rename from processor/memorylimiterprocessor/config_test.go rename to internal/memorylimiter/config_test.go index d4d2e787b85..ca7a243f861 100644 --- a/processor/memorylimiterprocessor/config_test.go +++ b/internal/memorylimiter/config_test.go @@ -1,7 +1,7 @@ // Copyright The OpenTelemetry Authors // SPDX-License-Identifier: Apache-2.0 -package memorylimiterprocessor +package memorylimiter import ( "path/filepath" @@ -12,22 +12,13 @@ import ( "github.com/stretchr/testify/require" "go.opentelemetry.io/collector/component" - "go.opentelemetry.io/collector/confmap" "go.opentelemetry.io/collector/confmap/confmaptest" ) -func TestUnmarshalDefaultConfig(t *testing.T) { - factory := NewFactory() - cfg := factory.CreateDefaultConfig() - assert.NoError(t, component.UnmarshalConfig(confmap.New(), cfg)) - assert.Equal(t, factory.CreateDefaultConfig(), cfg) -} - func TestUnmarshalConfig(t *testing.T) { cm, err := confmaptest.LoadConf(filepath.Join("testdata", "config.yaml")) require.NoError(t, err) - factory := NewFactory() - cfg := factory.CreateDefaultConfig() + cfg := &Config{} assert.NoError(t, component.UnmarshalConfig(cm, cfg)) assert.Equal(t, &Config{ @@ -45,13 +36,11 @@ func TestConfigValidate(t *testing.T) { }{ { name: "valid", - cfg: func() *Config { - cfg := createDefaultConfig().(*Config) - cfg.MemoryLimitMiB = 5722 - cfg.MemorySpikeLimitMiB = 1907 - cfg.CheckInterval = 100 * time.Millisecond - return cfg - }(), + cfg: &Config{ + MemoryLimitMiB: 5722, + MemorySpikeLimitMiB: 1907, + CheckInterval: 100 * time.Millisecond, + }, err: nil, }, { diff --git a/internal/memorylimiter/memorylimiter.go b/internal/memorylimiter/memorylimiter.go new file mode 100644 index 00000000000..a010cba5427 --- /dev/null +++ b/internal/memorylimiter/memorylimiter.go @@ -0,0 +1,262 @@ +// Copyright The OpenTelemetry Authors +// SPDX-License-Identifier: Apache-2.0 + +package memorylimiter // import "go.opentelemetry.io/collector/internal/memorylimiter" + +import ( + "context" + "errors" + "fmt" + "runtime" + "sync" + "sync/atomic" + "time" + + "go.uber.org/zap" + + "go.opentelemetry.io/collector/component" + "go.opentelemetry.io/collector/internal/iruntime" +) + +const ( + mibBytes = 1024 * 1024 + + // Minimum interval between forced GC when in soft limited mode. We don't want to + // do GCs too frequently since it is a CPU-heavy operation. + minGCIntervalWhenSoftLimited = 10 * time.Second +) + +var ( + // ErrDataRefused will be returned to callers of ConsumeTraceData to indicate + // that data is being refused due to high memory usage. + ErrDataRefused = errors.New("data refused due to high memory usage") + + // ErrShutdownNotStarted indicates no memorylimiter has not start when shutdown + ErrShutdownNotStarted = errors.New("no existing monitoring routine is running") + + // GetMemoryFn and ReadMemStatsFn make it overridable by tests + GetMemoryFn = iruntime.TotalMemory + ReadMemStatsFn = runtime.ReadMemStats +) + +// MemoryLimiter is used to prevent out of memory situations on the collector. +type MemoryLimiter struct { + usageChecker memUsageChecker + + memCheckWait time.Duration + ballastSize uint64 + + // mustRefuse is used to indicate when data should be refused. + mustRefuse *atomic.Bool + + ticker *time.Ticker + + lastGCDone time.Time + + // The function to read the mem values is set as a reference to help with + // testing different values. + readMemStatsFn func(m *runtime.MemStats) + + // Fields used for logging. + logger *zap.Logger + configMismatchedLogged bool + + refCounterLock sync.Mutex + refCounter int + waitGroup sync.WaitGroup + closed chan struct{} +} + +// NewMemoryLimiter returns a new memory limiter component +func NewMemoryLimiter(cfg *Config, logger *zap.Logger) (*MemoryLimiter, error) { + usageChecker, err := getMemUsageChecker(cfg, logger) + if err != nil { + return nil, err + } + + logger.Info("Memory limiter configured", + zap.Uint64("limit_mib", usageChecker.memAllocLimit/mibBytes), + zap.Uint64("spike_limit_mib", usageChecker.memSpikeLimit/mibBytes), + zap.Duration("check_interval", cfg.CheckInterval)) + + return &MemoryLimiter{ + usageChecker: *usageChecker, + memCheckWait: cfg.CheckInterval, + ticker: time.NewTicker(cfg.CheckInterval), + readMemStatsFn: ReadMemStatsFn, + logger: logger, + mustRefuse: &atomic.Bool{}, + }, nil +} + +// startMonitoring starts a single ticker'd goroutine per instance +// that will check memory usage every checkInterval period. +func (ml *MemoryLimiter) startMonitoring() { + ml.refCounterLock.Lock() + defer ml.refCounterLock.Unlock() + + ml.refCounter++ + if ml.refCounter == 1 { + ml.closed = make(chan struct{}) + ml.waitGroup.Add(1) + go func() { + defer ml.waitGroup.Done() + + for { + select { + case <-ml.ticker.C: + case <-ml.closed: + return + } + ml.CheckMemLimits() + } + }() + } +} + +func (ml *MemoryLimiter) Start(_ context.Context, host component.Host) error { + extensions := host.GetExtensions() + for _, extension := range extensions { + if ext, ok := extension.(interface{ GetBallastSize() uint64 }); ok { + ml.ballastSize = ext.GetBallastSize() + break + } + } + ml.startMonitoring() + return nil +} + +// Shutdown resets MemoryLimiter monitoring ticker and stop monitoring +func (ml *MemoryLimiter) Shutdown(context.Context) error { + ml.refCounterLock.Lock() + defer ml.refCounterLock.Unlock() + + if ml.refCounter == 0 { + return ErrShutdownNotStarted + } else if ml.refCounter == 1 { + ml.ticker.Stop() + close(ml.closed) + ml.waitGroup.Wait() + } + ml.refCounter-- + return nil +} + +// MustRefuse returns if the caller should deny because memory has reached it's configured limits +func (ml *MemoryLimiter) MustRefuse() bool { + return ml.mustRefuse.Load() +} + +func getMemUsageChecker(cfg *Config, logger *zap.Logger) (*memUsageChecker, error) { + memAllocLimit := uint64(cfg.MemoryLimitMiB) * mibBytes + memSpikeLimit := uint64(cfg.MemorySpikeLimitMiB) * mibBytes + if cfg.MemoryLimitMiB != 0 { + return newFixedMemUsageChecker(memAllocLimit, memSpikeLimit), nil + } + totalMemory, err := GetMemoryFn() + if err != nil { + return nil, fmt.Errorf("failed to get total memory, use fixed memory settings (limit_mib): %w", err) + } + logger.Info("Using percentage memory limiter", + zap.Uint64("total_memory_mib", totalMemory/mibBytes), + zap.Uint32("limit_percentage", cfg.MemoryLimitPercentage), + zap.Uint32("spike_limit_percentage", cfg.MemorySpikePercentage)) + return newPercentageMemUsageChecker(totalMemory, uint64(cfg.MemoryLimitPercentage), + uint64(cfg.MemorySpikePercentage)), nil +} + +func (ml *MemoryLimiter) readMemStats() *runtime.MemStats { + ms := &runtime.MemStats{} + ml.readMemStatsFn(ms) + // If proper configured ms.Alloc should be at least ml.ballastSize but since + // a misconfiguration is possible check for that here. + if ms.Alloc >= ml.ballastSize { + ms.Alloc -= ml.ballastSize + } else if !ml.configMismatchedLogged { + // This indicates misconfiguration. Log it once. + ml.configMismatchedLogged = true + ml.logger.Warn(`"size_mib" in ballast extension is likely incorrectly configured.`) + } + + return ms +} + +func memstatToZapField(ms *runtime.MemStats) zap.Field { + return zap.Uint64("cur_mem_mib", ms.Alloc/mibBytes) +} + +func (ml *MemoryLimiter) doGCandReadMemStats() *runtime.MemStats { + runtime.GC() + ml.lastGCDone = time.Now() + ms := ml.readMemStats() + ml.logger.Info("Memory usage after GC.", memstatToZapField(ms)) + return ms +} + +// CheckMemLimits inspects current memory usage against threshold and toggle mustRefuse when threshold is exceeded +func (ml *MemoryLimiter) CheckMemLimits() { + ms := ml.readMemStats() + + ml.logger.Debug("Currently used memory.", memstatToZapField(ms)) + + if ml.usageChecker.aboveHardLimit(ms) { + ml.logger.Warn("Memory usage is above hard limit. Forcing a GC.", memstatToZapField(ms)) + ms = ml.doGCandReadMemStats() + } + + // Remember current state. + wasRefusing := ml.mustRefuse.Load() + + // Check if the memory usage is above the soft limit. + mustRefuse := ml.usageChecker.aboveSoftLimit(ms) + + if wasRefusing && !mustRefuse { + // Was previously refusing but enough memory is available now, no need to limit. + ml.logger.Info("Memory usage back within limits. Resuming normal operation.", memstatToZapField(ms)) + } + + if !wasRefusing && mustRefuse { + // We are above soft limit, do a GC if it wasn't done recently and see if + // it brings memory usage below the soft limit. + if time.Since(ml.lastGCDone) > minGCIntervalWhenSoftLimited { + ml.logger.Info("Memory usage is above soft limit. Forcing a GC.", memstatToZapField(ms)) + ms = ml.doGCandReadMemStats() + // Check the limit again to see if GC helped. + mustRefuse = ml.usageChecker.aboveSoftLimit(ms) + } + + if mustRefuse { + ml.logger.Warn("Memory usage is above soft limit. Refusing data.", memstatToZapField(ms)) + } + } + + ml.mustRefuse.Store(mustRefuse) +} + +type memUsageChecker struct { + memAllocLimit uint64 + memSpikeLimit uint64 +} + +func (d memUsageChecker) aboveSoftLimit(ms *runtime.MemStats) bool { + return ms.Alloc >= d.memAllocLimit-d.memSpikeLimit +} + +func (d memUsageChecker) aboveHardLimit(ms *runtime.MemStats) bool { + return ms.Alloc >= d.memAllocLimit +} + +func newFixedMemUsageChecker(memAllocLimit, memSpikeLimit uint64) *memUsageChecker { + if memSpikeLimit == 0 { + // If spike limit is unspecified use 20% of mem limit. + memSpikeLimit = memAllocLimit / 5 + } + return &memUsageChecker{ + memAllocLimit: memAllocLimit, + memSpikeLimit: memSpikeLimit, + } +} + +func newPercentageMemUsageChecker(totalMemory uint64, percentageLimit, percentageSpike uint64) *memUsageChecker { + return newFixedMemUsageChecker(percentageLimit*totalMemory/100, percentageSpike*totalMemory/100) +} diff --git a/internal/memorylimiter/memorylimiter_test.go b/internal/memorylimiter/memorylimiter_test.go new file mode 100644 index 00000000000..c3395791a75 --- /dev/null +++ b/internal/memorylimiter/memorylimiter_test.go @@ -0,0 +1,188 @@ +// Copyright The OpenTelemetry Authors +// SPDX-License-Identifier: Apache-2.0 + +package memorylimiter + +import ( + "context" + "runtime" + "sync/atomic" + "testing" + "time" + + "github.com/stretchr/testify/assert" + "github.com/stretchr/testify/require" + "go.uber.org/zap" + + "go.opentelemetry.io/collector/component" + "go.opentelemetry.io/collector/internal/iruntime" +) + +// TestMemoryPressureResponse manipulates results from querying memory and +// check expected side effects. +func TestMemoryPressureResponse(t *testing.T) { + var currentMemAlloc uint64 + ml := &MemoryLimiter{ + usageChecker: memUsageChecker{ + memAllocLimit: 1024, + }, + mustRefuse: &atomic.Bool{}, + readMemStatsFn: func(ms *runtime.MemStats) { + ms.Alloc = currentMemAlloc + }, + logger: zap.NewNop(), + } + + // Below memAllocLimit. + currentMemAlloc = 800 + ml.CheckMemLimits() + assert.False(t, ml.MustRefuse()) + + // Above memAllocLimit. + currentMemAlloc = 1800 + ml.CheckMemLimits() + assert.True(t, ml.MustRefuse()) + + // Check ballast effect + ml.ballastSize = 1000 + + // Below memAllocLimit accounting for ballast. + currentMemAlloc = 800 + ml.ballastSize + ml.CheckMemLimits() + assert.False(t, ml.MustRefuse()) + + // Above memAllocLimit even accounting for ballast. + currentMemAlloc = 1800 + ml.ballastSize + ml.CheckMemLimits() + assert.True(t, ml.MustRefuse()) + + // Restore ballast to default. + ml.ballastSize = 0 + + // Check spike limit + ml.usageChecker.memSpikeLimit = 512 + + // Below memSpikeLimit. + currentMemAlloc = 500 + ml.CheckMemLimits() + assert.False(t, ml.MustRefuse()) + + // Above memSpikeLimit. + currentMemAlloc = 550 + ml.CheckMemLimits() + assert.True(t, ml.MustRefuse()) +} + +func TestGetDecision(t *testing.T) { + t.Run("fixed_limit", func(t *testing.T) { + d, err := getMemUsageChecker(&Config{MemoryLimitMiB: 100, MemorySpikeLimitMiB: 20}, zap.NewNop()) + require.NoError(t, err) + assert.Equal(t, &memUsageChecker{ + memAllocLimit: 100 * mibBytes, + memSpikeLimit: 20 * mibBytes, + }, d) + }) + + t.Cleanup(func() { + GetMemoryFn = iruntime.TotalMemory + }) + GetMemoryFn = func() (uint64, error) { + return 100 * mibBytes, nil + } + t.Run("percentage_limit", func(t *testing.T) { + d, err := getMemUsageChecker(&Config{MemoryLimitPercentage: 50, MemorySpikePercentage: 10}, zap.NewNop()) + require.NoError(t, err) + assert.Equal(t, &memUsageChecker{ + memAllocLimit: 50 * mibBytes, + memSpikeLimit: 10 * mibBytes, + }, d) + }) +} + +func TestRefuseDecision(t *testing.T) { + decison1000Limit30Spike30 := newPercentageMemUsageChecker(1000, 60, 30) + decison1000Limit60Spike50 := newPercentageMemUsageChecker(1000, 60, 50) + decison1000Limit40Spike20 := newPercentageMemUsageChecker(1000, 40, 20) + + tests := []struct { + name string + usageChecker memUsageChecker + ms *runtime.MemStats + shouldRefuse bool + }{ + { + name: "should refuse over limit", + usageChecker: *decison1000Limit30Spike30, + ms: &runtime.MemStats{Alloc: 600}, + shouldRefuse: true, + }, + { + name: "should not refuse", + usageChecker: *decison1000Limit30Spike30, + ms: &runtime.MemStats{Alloc: 100}, + shouldRefuse: false, + }, + { + name: "should not refuse spike, fixed usageChecker", + usageChecker: memUsageChecker{ + memAllocLimit: 600, + memSpikeLimit: 500, + }, + ms: &runtime.MemStats{Alloc: 300}, + shouldRefuse: true, + }, + { + name: "should refuse, spike, percentage usageChecker", + usageChecker: *decison1000Limit60Spike50, + ms: &runtime.MemStats{Alloc: 300}, + shouldRefuse: true, + }, + { + name: "should refuse, spike, percentage usageChecker", + usageChecker: *decison1000Limit40Spike20, + ms: &runtime.MemStats{Alloc: 250}, + shouldRefuse: true, + }, + } + for _, test := range tests { + t.Run(test.name, func(t *testing.T) { + shouldRefuse := test.usageChecker.aboveSoftLimit(test.ms) + assert.Equal(t, test.shouldRefuse, shouldRefuse) + }) + } +} + +func TestBallastSize(t *testing.T) { + cfg := &Config{ + CheckInterval: 10 * time.Second, + MemoryLimitMiB: 1024, + } + got, err := NewMemoryLimiter(cfg, zap.NewNop()) + require.NoError(t, err) + + got.startMonitoring() + require.NoError(t, got.Start(context.Background(), &host{ballastSize: 113})) + assert.Equal(t, uint64(113), got.ballastSize) + require.NoError(t, got.Shutdown(context.Background())) +} + +type host struct { + ballastSize uint64 + component.Host +} + +func (h *host) GetExtensions() map[component.ID]component.Component { + ret := make(map[component.ID]component.Component) + ret[component.NewID("ballast")] = &ballastExtension{ballastSize: h.ballastSize} + return ret +} + +type ballastExtension struct { + ballastSize uint64 + component.StartFunc + component.ShutdownFunc +} + +func (be *ballastExtension) GetBallastSize() uint64 { + return be.ballastSize +} diff --git a/processor/memorylimiterprocessor/testdata/config.yaml b/internal/memorylimiter/testdata/config.yaml similarity index 100% rename from processor/memorylimiterprocessor/testdata/config.yaml rename to internal/memorylimiter/testdata/config.yaml diff --git a/processor/memorylimiterprocessor/README.md b/processor/memorylimiterprocessor/README.md index d0070294477..6f5e51da789 100644 --- a/processor/memorylimiterprocessor/README.md +++ b/processor/memorylimiterprocessor/README.md @@ -79,7 +79,7 @@ A good starting point for `spike_limit_mib` is 20% of the hard limit. Bigger ## Configuration -Please refer to [config.go](./config.go) for the config spec. +Please refer to [memorylimiter.go](../../internal/memorylimiter/memorylimiter.go) for the config spec. The following configuration options **must be changed**: - `check_interval` (default = 0s): Time between measurements of memory @@ -124,6 +124,6 @@ processors: spike_limit_percentage: 30 ``` -Refer to [config.yaml](./testdata/config.yaml) for detailed +Refer to [config.yaml](../../internal/memorylimiter/testdata/config.yaml) for detailed examples on using the processor. diff --git a/processor/memorylimiterprocessor/config.go b/processor/memorylimiterprocessor/config.go index 940366741d8..8d7f28e14e5 100644 --- a/processor/memorylimiterprocessor/config.go +++ b/processor/memorylimiterprocessor/config.go @@ -1,68 +1,7 @@ // Copyright The OpenTelemetry Authors // SPDX-License-Identifier: Apache-2.0 -// Package memorylimiterprocessor provides a processor for OpenTelemetry Service pipeline -// that refuses data on the pipeline according to the current state of memory usage. package memorylimiterprocessor // import "go.opentelemetry.io/collector/processor/memorylimiterprocessor" +import "go.opentelemetry.io/collector/internal/memorylimiter" -import ( - "errors" - "time" - - "go.opentelemetry.io/collector/component" -) - -var ( - errCheckIntervalOutOfRange = errors.New("'check_interval' must be greater than zero") - errLimitOutOfRange = errors.New("'limit_mib' or 'limit_percentage' must be greater than zero") - errSpikeLimitOutOfRange = errors.New("'spike_limit_mib' must be smaller than 'limit_mib'") - errSpikeLimitPercentageOutOfRange = errors.New("'spike_limit_percentage' must be smaller than 'limit_percentage'") - errLimitPercentageOutOfRange = errors.New( - "'limit_percentage' and 'spike_limit_percentage' must be greater than zero and less than or equal to hundred") -) - -// Config defines configuration for memory memoryLimiter processor. -type Config struct { - // CheckInterval is the time between measurements of memory usage for the - // purposes of avoiding going over the limits. Defaults to zero, so no - // checks will be performed. - CheckInterval time.Duration `mapstructure:"check_interval"` - - // MemoryLimitMiB is the maximum amount of memory, in MiB, targeted to be - // allocated by the process. - MemoryLimitMiB uint32 `mapstructure:"limit_mib"` - - // MemorySpikeLimitMiB is the maximum, in MiB, spike expected between the - // measurements of memory usage. - MemorySpikeLimitMiB uint32 `mapstructure:"spike_limit_mib"` - - // MemoryLimitPercentage is the maximum amount of memory, in %, targeted to be - // allocated by the process. The fixed memory settings MemoryLimitMiB has a higher precedence. - MemoryLimitPercentage uint32 `mapstructure:"limit_percentage"` - - // MemorySpikePercentage is the maximum, in percents against the total memory, - // spike expected between the measurements of memory usage. - MemorySpikePercentage uint32 `mapstructure:"spike_limit_percentage"` -} - -var _ component.Config = (*Config)(nil) - -// Validate checks if the processor configuration is valid -func (cfg *Config) Validate() error { - if cfg.CheckInterval <= 0 { - return errCheckIntervalOutOfRange - } - if cfg.MemoryLimitMiB == 0 && cfg.MemoryLimitPercentage == 0 { - return errLimitOutOfRange - } - if cfg.MemoryLimitPercentage > 100 || cfg.MemorySpikePercentage > 100 { - return errLimitPercentageOutOfRange - } - if cfg.MemoryLimitMiB > 0 && cfg.MemoryLimitMiB <= cfg.MemorySpikeLimitMiB { - return errSpikeLimitOutOfRange - } - if cfg.MemoryLimitPercentage > 0 && cfg.MemoryLimitPercentage <= cfg.MemorySpikePercentage { - return errSpikeLimitPercentageOutOfRange - } - return nil -} +type Config = memorylimiter.Config diff --git a/processor/memorylimiterprocessor/factory.go b/processor/memorylimiterprocessor/factory.go index b9a0837f6b1..67ae80c996b 100644 --- a/processor/memorylimiterprocessor/factory.go +++ b/processor/memorylimiterprocessor/factory.go @@ -21,14 +21,14 @@ var processorCapabilities = consumer.Capabilities{MutatesData: false} type factory struct { // memoryLimiters stores memoryLimiter instances with unique configs that multiple processors can reuse. // This avoids running multiple memory checks (ie: GC) for every processor using the same processor config. - memoryLimiters map[component.Config]*memoryLimiter + memoryLimiters map[component.Config]*memoryLimiterProcessor lock sync.Mutex } // NewFactory returns a new factory for the Memory Limiter processor. func NewFactory() processor.Factory { f := &factory{ - memoryLimiters: map[component.Config]*memoryLimiter{}, + memoryLimiters: map[component.Config]*memoryLimiterProcessor{}, } return processor.NewFactory( metadata.Type, @@ -97,7 +97,7 @@ func (f *factory) createLogsProcessor( // getMemoryLimiter checks if we have a cached memoryLimiter with a specific config, // otherwise initialize and add one to the store. -func (f *factory) getMemoryLimiter(set processor.CreateSettings, cfg component.Config) (*memoryLimiter, error) { +func (f *factory) getMemoryLimiter(set processor.CreateSettings, cfg component.Config) (*memoryLimiterProcessor, error) { f.lock.Lock() defer f.lock.Unlock() @@ -105,7 +105,7 @@ func (f *factory) getMemoryLimiter(set processor.CreateSettings, cfg component.C return memLimiter, nil } - memLimiter, err := newMemoryLimiter(set, cfg.(*Config)) + memLimiter, err := newMemoryLimiterProcessor(set, cfg.(*Config)) if err != nil { return nil, err } diff --git a/processor/memorylimiterprocessor/factory_test.go b/processor/memorylimiterprocessor/factory_test.go index 29816264b64..b8cca4c6d20 100644 --- a/processor/memorylimiterprocessor/factory_test.go +++ b/processor/memorylimiterprocessor/factory_test.go @@ -13,6 +13,7 @@ import ( "go.opentelemetry.io/collector/component/componenttest" "go.opentelemetry.io/collector/consumer/consumertest" + "go.opentelemetry.io/collector/internal/memorylimiter" "go.opentelemetry.io/collector/processor/processortest" ) @@ -41,7 +42,7 @@ func TestCreateProcessor(t *testing.T) { assert.NoError(t, err) assert.NotNil(t, tp) // test if we can shutdown a monitoring routine that has not started - assert.ErrorIs(t, tp.Shutdown(context.Background()), errShutdownNotStarted) + assert.ErrorIs(t, tp.Shutdown(context.Background()), memorylimiter.ErrShutdownNotStarted) assert.NoError(t, tp.Start(context.Background(), componenttest.NewNopHost())) mp, err := factory.CreateMetricsProcessor(context.Background(), processortest.NewNopCreateSettings(), cfg, consumertest.NewNop()) @@ -58,11 +59,11 @@ func TestCreateProcessor(t *testing.T) { assert.NoError(t, tp.Shutdown(context.Background())) assert.NoError(t, mp.Shutdown(context.Background())) // verify that no monitoring routine is running - assert.Error(t, tp.Shutdown(context.Background())) + assert.ErrorIs(t, tp.Shutdown(context.Background()), memorylimiter.ErrShutdownNotStarted) // start and shutdown a new monitoring routine assert.NoError(t, lp.Start(context.Background(), componenttest.NewNopHost())) assert.NoError(t, lp.Shutdown(context.Background())) // calling it again should throw an error - assert.ErrorIs(t, lp.Shutdown(context.Background()), errShutdownNotStarted) + assert.ErrorIs(t, lp.Shutdown(context.Background()), memorylimiter.ErrShutdownNotStarted) } diff --git a/processor/memorylimiterprocessor/go.mod b/processor/memorylimiterprocessor/go.mod index f163de4cdd1..a243d576b4c 100644 --- a/processor/memorylimiterprocessor/go.mod +++ b/processor/memorylimiterprocessor/go.mod @@ -6,15 +6,12 @@ require ( github.com/stretchr/testify v1.8.4 go.opentelemetry.io/collector v0.92.0 go.opentelemetry.io/collector/component v0.92.0 - go.opentelemetry.io/collector/config/configtelemetry v0.92.0 - go.opentelemetry.io/collector/confmap v0.92.0 go.opentelemetry.io/collector/consumer v0.92.0 go.opentelemetry.io/collector/pdata v1.0.1 go.opentelemetry.io/collector/processor v0.92.0 go.opentelemetry.io/otel/metric v1.22.0 go.opentelemetry.io/otel/trace v1.22.0 go.uber.org/goleak v1.3.0 - go.uber.org/zap v1.26.0 ) require ( @@ -53,12 +50,15 @@ require ( github.com/tklauser/numcpus v0.6.1 // indirect github.com/yusufpapurcu/wmi v1.2.3 // indirect go.opencensus.io v0.24.0 // indirect + go.opentelemetry.io/collector/config/configtelemetry v0.92.0 // indirect + go.opentelemetry.io/collector/confmap v0.92.0 // indirect go.opentelemetry.io/collector/featuregate v1.0.1 // indirect go.opentelemetry.io/otel v1.22.0 // indirect go.opentelemetry.io/otel/exporters/prometheus v0.44.1-0.20231201153405-6027c1ae76f2 // indirect go.opentelemetry.io/otel/sdk v1.22.0 // indirect go.opentelemetry.io/otel/sdk/metric v1.22.0 // indirect go.uber.org/multierr v1.11.0 // indirect + go.uber.org/zap v1.26.0 // indirect golang.org/x/net v0.20.0 // indirect golang.org/x/sys v0.16.0 // indirect golang.org/x/text v0.14.0 // indirect diff --git a/processor/memorylimiterprocessor/memorylimiter.go b/processor/memorylimiterprocessor/memorylimiter.go index 5d0b4bf7231..6d7368bfb6a 100644 --- a/processor/memorylimiterprocessor/memorylimiter.go +++ b/processor/memorylimiterprocessor/memorylimiter.go @@ -5,17 +5,9 @@ package memorylimiterprocessor // import "go.opentelemetry.io/collector/processo import ( "context" - "errors" - "fmt" - "runtime" - "sync" - "sync/atomic" - "time" - - "go.uber.org/zap" "go.opentelemetry.io/collector/component" - "go.opentelemetry.io/collector/internal/iruntime" + "go.opentelemetry.io/collector/internal/memorylimiter" "go.opentelemetry.io/collector/pdata/plog" "go.opentelemetry.io/collector/pdata/pmetric" "go.opentelemetry.io/collector/pdata/ptrace" @@ -23,67 +15,17 @@ import ( "go.opentelemetry.io/collector/processor/processorhelper" ) -const ( - mibBytes = 1024 * 1024 -) - -var ( - // errDataRefused will be returned to callers of ConsumeTraceData to indicate - // that data is being refused due to high memory usage. - errDataRefused = errors.New("data refused due to high memory usage") - - errShutdownNotStarted = errors.New("no existing monitoring routine is running") -) - -// make it overridable by tests -var getMemoryFn = iruntime.TotalMemory - -type memoryLimiter struct { - usageChecker memUsageChecker - - memCheckWait time.Duration - ballastSize uint64 - - // mustRefuse is used to indicate when data should be refused. - mustRefuse *atomic.Bool - - ticker *time.Ticker - - lastGCDone time.Time - - // The function to read the mem values is set as a reference to help with - // testing different values. - readMemStatsFn func(m *runtime.MemStats) - - // Fields used for logging. - logger *zap.Logger - configMismatchedLogged bool - - obsrep *processorhelper.ObsReport - - refCounterLock sync.Mutex - refCounter int - waitGroup sync.WaitGroup - closed chan struct{} +type memoryLimiterProcessor struct { + memlimiter *memorylimiter.MemoryLimiter + obsrep *processorhelper.ObsReport } -// Minimum interval between forced GC when in soft limited mode. We don't want to -// do GCs too frequently since it is a CPU-heavy operation. -const minGCIntervalWhenSoftLimited = 10 * time.Second - // newMemoryLimiter returns a new memorylimiter processor. -func newMemoryLimiter(set processor.CreateSettings, cfg *Config) (*memoryLimiter, error) { - logger := set.Logger - usageChecker, err := getMemUsageChecker(cfg, logger) +func newMemoryLimiterProcessor(set processor.CreateSettings, cfg *Config) (*memoryLimiterProcessor, error) { + ml, err := memorylimiter.NewMemoryLimiter(cfg, set.Logger) if err != nil { return nil, err } - - logger.Info("Memory limiter configured", - zap.Uint64("limit_mib", usageChecker.memAllocLimit/mibBytes), - zap.Uint64("spike_limit_mib", usageChecker.memSpikeLimit/mibBytes), - zap.Duration("check_interval", cfg.CheckInterval)) - obsrep, err := processorhelper.NewObsReport(processorhelper.ObsReportSettings{ ProcessorID: set.ID, ProcessorCreateSettings: set, @@ -92,236 +34,72 @@ func newMemoryLimiter(set processor.CreateSettings, cfg *Config) (*memoryLimiter return nil, err } - ml := &memoryLimiter{ - usageChecker: *usageChecker, - memCheckWait: cfg.CheckInterval, - ticker: time.NewTicker(cfg.CheckInterval), - readMemStatsFn: runtime.ReadMemStats, - logger: logger, - mustRefuse: &atomic.Bool{}, - obsrep: obsrep, + p := &memoryLimiterProcessor{ + memlimiter: ml, + obsrep: obsrep, } - return ml, nil -} - -func getMemUsageChecker(cfg *Config, logger *zap.Logger) (*memUsageChecker, error) { - memAllocLimit := uint64(cfg.MemoryLimitMiB) * mibBytes - memSpikeLimit := uint64(cfg.MemorySpikeLimitMiB) * mibBytes - if cfg.MemoryLimitMiB != 0 { - return newFixedMemUsageChecker(memAllocLimit, memSpikeLimit), nil - } - totalMemory, err := getMemoryFn() - if err != nil { - return nil, fmt.Errorf("failed to get total memory, use fixed memory settings (limit_mib): %w", err) - } - logger.Info("Using percentage memory limiter", - zap.Uint64("total_memory_mib", totalMemory/mibBytes), - zap.Uint32("limit_percentage", cfg.MemoryLimitPercentage), - zap.Uint32("spike_limit_percentage", cfg.MemorySpikePercentage)) - return newPercentageMemUsageChecker(totalMemory, uint64(cfg.MemoryLimitPercentage), - uint64(cfg.MemorySpikePercentage)), nil + return p, nil } -func (ml *memoryLimiter) start(_ context.Context, host component.Host) error { - extensions := host.GetExtensions() - for _, extension := range extensions { - if ext, ok := extension.(interface{ GetBallastSize() uint64 }); ok { - ml.ballastSize = ext.GetBallastSize() - break - } - } - ml.startMonitoring() - return nil +func (p *memoryLimiterProcessor) start(ctx context.Context, host component.Host) error { + return p.memlimiter.Start(ctx, host) } -func (ml *memoryLimiter) shutdown(context.Context) error { - ml.refCounterLock.Lock() - defer ml.refCounterLock.Unlock() - - if ml.refCounter == 0 { - return errShutdownNotStarted - } else if ml.refCounter == 1 { - ml.ticker.Stop() - close(ml.closed) - ml.waitGroup.Wait() - } - ml.refCounter-- - return nil +func (p *memoryLimiterProcessor) shutdown(ctx context.Context) error { + return p.memlimiter.Shutdown(ctx) } -func (ml *memoryLimiter) processTraces(ctx context.Context, td ptrace.Traces) (ptrace.Traces, error) { +func (p *memoryLimiterProcessor) processTraces(ctx context.Context, td ptrace.Traces) (ptrace.Traces, error) { numSpans := td.SpanCount() - if ml.mustRefuse.Load() { + if p.memlimiter.MustRefuse() { // TODO: actually to be 100% sure that this is "refused" and not "dropped" // it is necessary to check the pipeline to see if this is directly connected // to a receiver (ie.: a receiver is on the call stack). For now it // assumes that the pipeline is properly configured and a receiver is on the // callstack and that the receiver will correctly retry the refused data again. - ml.obsrep.TracesRefused(ctx, numSpans) - - return td, errDataRefused + p.obsrep.TracesRefused(ctx, numSpans) + return td, memorylimiter.ErrDataRefused } // Even if the next consumer returns error record the data as accepted by // this processor. - ml.obsrep.TracesAccepted(ctx, numSpans) + p.obsrep.TracesAccepted(ctx, numSpans) return td, nil } -func (ml *memoryLimiter) processMetrics(ctx context.Context, md pmetric.Metrics) (pmetric.Metrics, error) { +func (p *memoryLimiterProcessor) processMetrics(ctx context.Context, md pmetric.Metrics) (pmetric.Metrics, error) { numDataPoints := md.DataPointCount() - if ml.mustRefuse.Load() { + if p.memlimiter.MustRefuse() { // TODO: actually to be 100% sure that this is "refused" and not "dropped" // it is necessary to check the pipeline to see if this is directly connected // to a receiver (ie.: a receiver is on the call stack). For now it // assumes that the pipeline is properly configured and a receiver is on the // callstack. - ml.obsrep.MetricsRefused(ctx, numDataPoints) - return md, errDataRefused + p.obsrep.MetricsRefused(ctx, numDataPoints) + return md, memorylimiter.ErrDataRefused } // Even if the next consumer returns error record the data as accepted by // this processor. - ml.obsrep.MetricsAccepted(ctx, numDataPoints) + p.obsrep.MetricsAccepted(ctx, numDataPoints) return md, nil } -func (ml *memoryLimiter) processLogs(ctx context.Context, ld plog.Logs) (plog.Logs, error) { +func (p *memoryLimiterProcessor) processLogs(ctx context.Context, ld plog.Logs) (plog.Logs, error) { numRecords := ld.LogRecordCount() - if ml.mustRefuse.Load() { + if p.memlimiter.MustRefuse() { // TODO: actually to be 100% sure that this is "refused" and not "dropped" // it is necessary to check the pipeline to see if this is directly connected // to a receiver (ie.: a receiver is on the call stack). For now it // assumes that the pipeline is properly configured and a receiver is on the // callstack. - ml.obsrep.LogsRefused(ctx, numRecords) - - return ld, errDataRefused + p.obsrep.LogsRefused(ctx, numRecords) + return ld, memorylimiter.ErrDataRefused } // Even if the next consumer returns error record the data as accepted by // this processor. - ml.obsrep.LogsAccepted(ctx, numRecords) + p.obsrep.LogsAccepted(ctx, numRecords) return ld, nil } - -func (ml *memoryLimiter) readMemStats() *runtime.MemStats { - ms := &runtime.MemStats{} - ml.readMemStatsFn(ms) - // If proper configured ms.Alloc should be at least ml.ballastSize but since - // a misconfiguration is possible check for that here. - if ms.Alloc >= ml.ballastSize { - ms.Alloc -= ml.ballastSize - } else if !ml.configMismatchedLogged { - // This indicates misconfiguration. Log it once. - ml.configMismatchedLogged = true - ml.logger.Warn(`"size_mib" in ballast extension is likely incorrectly configured.`) - } - - return ms -} - -// startMonitoring starts a single ticker'd goroutine per instance -// that will check memory usage every checkInterval period. -func (ml *memoryLimiter) startMonitoring() { - ml.refCounterLock.Lock() - defer ml.refCounterLock.Unlock() - - ml.refCounter++ - if ml.refCounter == 1 { - ml.closed = make(chan struct{}) - ml.waitGroup.Add(1) - go func() { - defer ml.waitGroup.Done() - - for { - select { - case <-ml.ticker.C: - case <-ml.closed: - return - } - ml.checkMemLimits() - } - }() - } -} - -func memstatToZapField(ms *runtime.MemStats) zap.Field { - return zap.Uint64("cur_mem_mib", ms.Alloc/mibBytes) -} - -func (ml *memoryLimiter) doGCandReadMemStats() *runtime.MemStats { - runtime.GC() - ml.lastGCDone = time.Now() - ms := ml.readMemStats() - ml.logger.Info("Memory usage after GC.", memstatToZapField(ms)) - return ms -} - -func (ml *memoryLimiter) checkMemLimits() { - ms := ml.readMemStats() - - ml.logger.Debug("Currently used memory.", memstatToZapField(ms)) - - if ml.usageChecker.aboveHardLimit(ms) { - ml.logger.Warn("Memory usage is above hard limit. Forcing a GC.", memstatToZapField(ms)) - ms = ml.doGCandReadMemStats() - } - - // Remember current state. - wasRefusing := ml.mustRefuse.Load() - - // Check if the memory usage is above the soft limit. - mustRefuse := ml.usageChecker.aboveSoftLimit(ms) - - if wasRefusing && !mustRefuse { - // Was previously refusing but enough memory is available now, no need to limit. - ml.logger.Info("Memory usage back within limits. Resuming normal operation.", memstatToZapField(ms)) - } - - if !wasRefusing && mustRefuse { - // We are above soft limit, do a GC if it wasn't done recently and see if - // it brings memory usage below the soft limit. - if time.Since(ml.lastGCDone) > minGCIntervalWhenSoftLimited { - ml.logger.Info("Memory usage is above soft limit. Forcing a GC.", memstatToZapField(ms)) - ms = ml.doGCandReadMemStats() - // Check the limit again to see if GC helped. - mustRefuse = ml.usageChecker.aboveSoftLimit(ms) - } - - if mustRefuse { - ml.logger.Warn("Memory usage is above soft limit. Refusing data.", memstatToZapField(ms)) - } - } - - ml.mustRefuse.Store(mustRefuse) -} - -type memUsageChecker struct { - memAllocLimit uint64 - memSpikeLimit uint64 -} - -func (d memUsageChecker) aboveSoftLimit(ms *runtime.MemStats) bool { - return ms.Alloc >= d.memAllocLimit-d.memSpikeLimit -} - -func (d memUsageChecker) aboveHardLimit(ms *runtime.MemStats) bool { - return ms.Alloc >= d.memAllocLimit -} - -func newFixedMemUsageChecker(memAllocLimit, memSpikeLimit uint64) *memUsageChecker { - if memSpikeLimit == 0 { - // If spike limit is unspecified use 20% of mem limit. - memSpikeLimit = memAllocLimit / 5 - } - return &memUsageChecker{ - memAllocLimit: memAllocLimit, - memSpikeLimit: memSpikeLimit, - } -} - -func newPercentageMemUsageChecker(totalMemory uint64, percentageLimit, percentageSpike uint64) *memUsageChecker { - return newFixedMemUsageChecker(percentageLimit*totalMemory/100, percentageSpike*totalMemory/100) -} diff --git a/processor/memorylimiterprocessor/memorylimiter_test.go b/processor/memorylimiterprocessor/memorylimiter_test.go index 9218282306b..6a3c3999ce9 100644 --- a/processor/memorylimiterprocessor/memorylimiter_test.go +++ b/processor/memorylimiterprocessor/memorylimiter_test.go @@ -6,19 +6,17 @@ package memorylimiterprocessor import ( "context" "runtime" - "sync/atomic" "testing" "time" "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" - "go.uber.org/zap" "go.opentelemetry.io/collector/component" "go.opentelemetry.io/collector/component/componenttest" - "go.opentelemetry.io/collector/config/configtelemetry" "go.opentelemetry.io/collector/consumer/consumertest" "go.opentelemetry.io/collector/internal/iruntime" + "go.opentelemetry.io/collector/internal/memorylimiter" "go.opentelemetry.io/collector/pdata/plog" "go.opentelemetry.io/collector/pdata/pmetric" "go.opentelemetry.io/collector/pdata/ptrace" @@ -28,336 +26,6 @@ import ( "go.opentelemetry.io/collector/processor/processortest" ) -// TestMetricsMemoryPressureResponse manipulates results from querying memory and -// check expected side effects. -func TestMetricsMemoryPressureResponse(t *testing.T) { - var currentMemAlloc uint64 - ml := &memoryLimiter{ - usageChecker: memUsageChecker{ - memAllocLimit: 1024, - }, - mustRefuse: &atomic.Bool{}, - readMemStatsFn: func(ms *runtime.MemStats) { - ms.Alloc = currentMemAlloc - }, - obsrep: newObsReport(t), - logger: zap.NewNop(), - } - mp, err := processorhelper.NewMetricsProcessor( - context.Background(), - processortest.NewNopCreateSettings(), - &Config{}, - consumertest.NewNop(), - ml.processMetrics, - processorhelper.WithCapabilities(processorCapabilities), - processorhelper.WithShutdown(ml.shutdown)) - require.NoError(t, err) - - ctx := context.Background() - md := pmetric.NewMetrics() - - // Below memAllocLimit. - currentMemAlloc = 800 - ml.checkMemLimits() - assert.NoError(t, mp.ConsumeMetrics(ctx, md)) - - // Above memAllocLimit. - currentMemAlloc = 1800 - ml.checkMemLimits() - assert.Equal(t, errDataRefused, mp.ConsumeMetrics(ctx, md)) - - // Check ballast effect - ml.ballastSize = 1000 - - // Below memAllocLimit accounting for ballast. - currentMemAlloc = 800 + ml.ballastSize - ml.checkMemLimits() - assert.NoError(t, mp.ConsumeMetrics(ctx, md)) - - // Above memAllocLimit even accountiing for ballast. - currentMemAlloc = 1800 + ml.ballastSize - ml.checkMemLimits() - assert.Equal(t, errDataRefused, mp.ConsumeMetrics(ctx, md)) - - // Restore ballast to default. - ml.ballastSize = 0 - - // Check spike limit - ml.usageChecker.memSpikeLimit = 512 - - // Below memSpikeLimit. - currentMemAlloc = 500 - ml.checkMemLimits() - assert.NoError(t, mp.ConsumeMetrics(ctx, md)) - - // Above memSpikeLimit. - currentMemAlloc = 550 - ml.checkMemLimits() - assert.Equal(t, errDataRefused, mp.ConsumeMetrics(ctx, md)) - -} - -// TestTraceMemoryPressureResponse manipulates results from querying memory and -// check expected side effects. -func TestTraceMemoryPressureResponse(t *testing.T) { - var currentMemAlloc uint64 - ml := &memoryLimiter{ - usageChecker: memUsageChecker{ - memAllocLimit: 1024, - }, - mustRefuse: &atomic.Bool{}, - readMemStatsFn: func(ms *runtime.MemStats) { - ms.Alloc = currentMemAlloc - }, - obsrep: newObsReport(t), - logger: zap.NewNop(), - } - tp, err := processorhelper.NewTracesProcessor( - context.Background(), - processortest.NewNopCreateSettings(), - &Config{}, - consumertest.NewNop(), - ml.processTraces, - processorhelper.WithCapabilities(processorCapabilities), - processorhelper.WithShutdown(ml.shutdown)) - require.NoError(t, err) - - ctx := context.Background() - td := ptrace.NewTraces() - - // Below memAllocLimit. - currentMemAlloc = 800 - ml.checkMemLimits() - assert.NoError(t, tp.ConsumeTraces(ctx, td)) - - // Above memAllocLimit. - currentMemAlloc = 1800 - ml.checkMemLimits() - assert.Equal(t, errDataRefused, tp.ConsumeTraces(ctx, td)) - - // Check ballast effect - ml.ballastSize = 1000 - - // Below memAllocLimit accounting for ballast. - currentMemAlloc = 800 + ml.ballastSize - ml.checkMemLimits() - assert.NoError(t, tp.ConsumeTraces(ctx, td)) - - // Above memAllocLimit even accountiing for ballast. - currentMemAlloc = 1800 + ml.ballastSize - ml.checkMemLimits() - assert.Equal(t, errDataRefused, tp.ConsumeTraces(ctx, td)) - - // Restore ballast to default. - ml.ballastSize = 0 - - // Check spike limit - ml.usageChecker.memSpikeLimit = 512 - - // Below memSpikeLimit. - currentMemAlloc = 500 - ml.checkMemLimits() - assert.NoError(t, tp.ConsumeTraces(ctx, td)) - - // Above memSpikeLimit. - currentMemAlloc = 550 - ml.checkMemLimits() - assert.Equal(t, errDataRefused, tp.ConsumeTraces(ctx, td)) - -} - -// TestLogMemoryPressureResponse manipulates results from querying memory and -// check expected side effects. -func TestLogMemoryPressureResponse(t *testing.T) { - var currentMemAlloc uint64 - ml := &memoryLimiter{ - usageChecker: memUsageChecker{ - memAllocLimit: 1024, - }, - mustRefuse: &atomic.Bool{}, - readMemStatsFn: func(ms *runtime.MemStats) { - ms.Alloc = currentMemAlloc - }, - obsrep: newObsReport(t), - logger: zap.NewNop(), - } - lp, err := processorhelper.NewLogsProcessor( - context.Background(), - processortest.NewNopCreateSettings(), - &Config{}, - consumertest.NewNop(), - ml.processLogs, - processorhelper.WithCapabilities(processorCapabilities), - processorhelper.WithShutdown(ml.shutdown)) - require.NoError(t, err) - - ctx := context.Background() - ld := plog.NewLogs() - - // Below memAllocLimit. - currentMemAlloc = 800 - ml.checkMemLimits() - assert.NoError(t, lp.ConsumeLogs(ctx, ld)) - - // Above memAllocLimit. - currentMemAlloc = 1800 - ml.checkMemLimits() - assert.Equal(t, errDataRefused, lp.ConsumeLogs(ctx, ld)) - - // Check ballast effect - ml.ballastSize = 1000 - - // Below memAllocLimit accounting for ballast. - currentMemAlloc = 800 + ml.ballastSize - ml.checkMemLimits() - assert.NoError(t, lp.ConsumeLogs(ctx, ld)) - - // Above memAllocLimit even accountiing for ballast. - currentMemAlloc = 1800 + ml.ballastSize - ml.checkMemLimits() - assert.Equal(t, errDataRefused, lp.ConsumeLogs(ctx, ld)) - - // Restore ballast to default. - ml.ballastSize = 0 - - // Check spike limit - ml.usageChecker.memSpikeLimit = 512 - - // Below memSpikeLimit. - currentMemAlloc = 500 - ml.checkMemLimits() - assert.NoError(t, lp.ConsumeLogs(ctx, ld)) - - // Above memSpikeLimit. - currentMemAlloc = 550 - ml.checkMemLimits() - assert.Equal(t, errDataRefused, lp.ConsumeLogs(ctx, ld)) -} - -func TestGetDecision(t *testing.T) { - t.Run("fixed_limit", func(t *testing.T) { - d, err := getMemUsageChecker(&Config{MemoryLimitMiB: 100, MemorySpikeLimitMiB: 20}, zap.NewNop()) - require.NoError(t, err) - assert.Equal(t, &memUsageChecker{ - memAllocLimit: 100 * mibBytes, - memSpikeLimit: 20 * mibBytes, - }, d) - }) - - t.Cleanup(func() { - getMemoryFn = iruntime.TotalMemory - }) - getMemoryFn = func() (uint64, error) { - return 100 * mibBytes, nil - } - t.Run("percentage_limit", func(t *testing.T) { - d, err := getMemUsageChecker(&Config{MemoryLimitPercentage: 50, MemorySpikePercentage: 10}, zap.NewNop()) - require.NoError(t, err) - assert.Equal(t, &memUsageChecker{ - memAllocLimit: 50 * mibBytes, - memSpikeLimit: 10 * mibBytes, - }, d) - }) -} - -func TestRefuseDecision(t *testing.T) { - decison1000Limit30Spike30 := newPercentageMemUsageChecker(1000, 60, 30) - decison1000Limit60Spike50 := newPercentageMemUsageChecker(1000, 60, 50) - decison1000Limit40Spike20 := newPercentageMemUsageChecker(1000, 40, 20) - - tests := []struct { - name string - usageChecker memUsageChecker - ms *runtime.MemStats - shouldRefuse bool - }{ - { - name: "should refuse over limit", - usageChecker: *decison1000Limit30Spike30, - ms: &runtime.MemStats{Alloc: 600}, - shouldRefuse: true, - }, - { - name: "should not refuse", - usageChecker: *decison1000Limit30Spike30, - ms: &runtime.MemStats{Alloc: 100}, - shouldRefuse: false, - }, - { - name: "should not refuse spike, fixed usageChecker", - usageChecker: memUsageChecker{ - memAllocLimit: 600, - memSpikeLimit: 500, - }, - ms: &runtime.MemStats{Alloc: 300}, - shouldRefuse: true, - }, - { - name: "should refuse, spike, percentage usageChecker", - usageChecker: *decison1000Limit60Spike50, - ms: &runtime.MemStats{Alloc: 300}, - shouldRefuse: true, - }, - { - name: "should refuse, spike, percentage usageChecker", - usageChecker: *decison1000Limit40Spike20, - ms: &runtime.MemStats{Alloc: 250}, - shouldRefuse: true, - }, - } - for _, test := range tests { - t.Run(test.name, func(t *testing.T) { - shouldRefuse := test.usageChecker.aboveSoftLimit(test.ms) - assert.Equal(t, test.shouldRefuse, shouldRefuse) - }) - } -} - -func TestBallastSize(t *testing.T) { - cfg := createDefaultConfig().(*Config) - cfg.CheckInterval = 10 * time.Second - cfg.MemoryLimitMiB = 1024 - got, err := newMemoryLimiter(processortest.NewNopCreateSettings(), cfg) - require.NoError(t, err) - require.NoError(t, got.start(context.Background(), &host{ballastSize: 113})) - assert.Equal(t, uint64(113), got.ballastSize) - require.NoError(t, got.shutdown(context.Background())) -} - -type host struct { - ballastSize uint64 - component.Host -} - -func (h *host) GetExtensions() map[component.ID]component.Component { - ret := make(map[component.ID]component.Component) - ret[component.NewID("ballast")] = &ballastExtension{ballastSize: h.ballastSize} - return ret -} - -type ballastExtension struct { - ballastSize uint64 - component.StartFunc - component.ShutdownFunc -} - -func (be *ballastExtension) GetBallastSize() uint64 { - return be.ballastSize -} - -func newObsReport(t *testing.T) *processorhelper.ObsReport { - set := processorhelper.ObsReportSettings{ - ProcessorID: component.NewID("memory_limiter"), - ProcessorCreateSettings: processortest.NewNopCreateSettings(), - } - set.ProcessorCreateSettings.MetricsLevel = configtelemetry.LevelNone - - proc, err := processorhelper.NewObsReport(set) - require.NoError(t, err) - - return proc -} - func TestNoDataLoss(t *testing.T) { // Create an exporter. exporter := internal.NewMockExporter() @@ -385,7 +53,7 @@ func TestNoDataLoss(t *testing.T) { set := processortest.NewNopCreateSettings() - limiter, err := newMemoryLimiter(set, cfg) + limiter, err := newMemoryLimiterProcessor(set, cfg) require.NoError(t, err) processor, err := processorhelper.NewLogsProcessor(context.Background(), processor.CreateSettings{}, cfg, exporter, @@ -440,3 +108,379 @@ func TestNoDataLoss(t *testing.T) { err = processor.Shutdown(context.Background()) require.NoError(t, err) } + +// TestMetricsMemoryPressureResponse manipulates results from querying memory and +// check expected side effects. +func TestMetricsMemoryPressureResponse(t *testing.T) { + md := pmetric.NewMetrics() + ctx := context.Background() + + tests := []struct { + name string + mlCfg *Config + ballastSize uint64 + memAlloc uint64 + expectError bool + }{ + { + name: "Below memAllocLimit", + mlCfg: &Config{ + CheckInterval: time.Second, + MemoryLimitPercentage: 50, + MemorySpikePercentage: 1, + }, + ballastSize: 0, + memAlloc: 800, + expectError: false, + }, + { + name: "Above memAllocLimit", + mlCfg: &Config{ + CheckInterval: time.Second, + MemoryLimitPercentage: 50, + MemorySpikePercentage: 1, + }, + ballastSize: 0, + memAlloc: 1800, + expectError: true, + }, + { + name: "Below memAllocLimit accounting for ballast", + mlCfg: &Config{ + CheckInterval: time.Second, + MemoryLimitPercentage: 50, + MemorySpikePercentage: 1, + }, + ballastSize: 1000, + memAlloc: 800, + expectError: false, + }, + { + name: "Above memAllocLimit even accounting for ballast", + mlCfg: &Config{ + CheckInterval: time.Second, + MemoryLimitPercentage: 50, + MemorySpikePercentage: 1, + }, + ballastSize: 1000, + memAlloc: 1800, + expectError: true, + }, + { + name: "Below memSpikeLimit", + mlCfg: &Config{ + CheckInterval: time.Second, + MemoryLimitPercentage: 50, + MemorySpikePercentage: 10, + }, + ballastSize: 0, + memAlloc: 800, + expectError: false, + }, + { + name: "Above memSpikeLimit", + mlCfg: &Config{ + CheckInterval: time.Second, + MemoryLimitPercentage: 50, + MemorySpikePercentage: 11, + }, + ballastSize: 0, + memAlloc: 800, + expectError: true, + }, + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + memorylimiter.GetMemoryFn = totalMemory + memorylimiter.ReadMemStatsFn = func(ms *runtime.MemStats) { + ms.Alloc = tt.memAlloc + tt.ballastSize + } + + ml, err := newMemoryLimiterProcessor(processortest.NewNopCreateSettings(), tt.mlCfg) + require.NoError(t, err) + mp, err := processorhelper.NewMetricsProcessor( + context.Background(), + processortest.NewNopCreateSettings(), + tt.mlCfg, + consumertest.NewNop(), + ml.processMetrics, + processorhelper.WithCapabilities(processorCapabilities), + processorhelper.WithStart(ml.start), + processorhelper.WithShutdown(ml.shutdown)) + require.NoError(t, err) + + assert.NoError(t, mp.Start(ctx, &host{ballastSize: tt.ballastSize})) + ml.memlimiter.CheckMemLimits() + err = mp.ConsumeMetrics(ctx, md) + if tt.expectError { + assert.Equal(t, memorylimiter.ErrDataRefused, err) + } else { + assert.NoError(t, err) + } + assert.NoError(t, mp.Shutdown(ctx)) + }) + } + t.Cleanup(func() { + memorylimiter.GetMemoryFn = iruntime.TotalMemory + memorylimiter.ReadMemStatsFn = runtime.ReadMemStats + }) +} + +// TestTraceMemoryPressureResponse manipulates results from querying memory and +// check expected side effects. +func TestTraceMemoryPressureResponse(t *testing.T) { + td := ptrace.NewTraces() + ctx := context.Background() + + tests := []struct { + name string + mlCfg *Config + ballastSize uint64 + memAlloc uint64 + expectError bool + }{ + { + name: "Below memAllocLimit", + mlCfg: &Config{ + CheckInterval: time.Second, + MemoryLimitPercentage: 50, + MemorySpikePercentage: 1, + }, + ballastSize: 0, + memAlloc: 800, + expectError: false, + }, + { + name: "Above memAllocLimit", + mlCfg: &Config{ + CheckInterval: time.Second, + MemoryLimitPercentage: 50, + MemorySpikePercentage: 1, + }, + ballastSize: 0, + memAlloc: 1800, + expectError: true, + }, + { + name: "Below memAllocLimit accounting for ballast", + mlCfg: &Config{ + CheckInterval: time.Second, + MemoryLimitPercentage: 50, + MemorySpikePercentage: 1, + }, + ballastSize: 1000, + memAlloc: 800, + expectError: false, + }, + { + name: "Above memAllocLimit even accounting for ballast", + mlCfg: &Config{ + CheckInterval: time.Second, + MemoryLimitPercentage: 50, + MemorySpikePercentage: 1, + }, + ballastSize: 1000, + memAlloc: 1800, + expectError: true, + }, + { + name: "Below memSpikeLimit", + mlCfg: &Config{ + CheckInterval: time.Second, + MemoryLimitPercentage: 50, + MemorySpikePercentage: 10, + }, + ballastSize: 0, + memAlloc: 800, + expectError: false, + }, + { + name: "Above memSpikeLimit", + mlCfg: &Config{ + CheckInterval: time.Second, + MemoryLimitPercentage: 50, + MemorySpikePercentage: 11, + }, + ballastSize: 0, + memAlloc: 800, + expectError: true, + }, + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + memorylimiter.GetMemoryFn = totalMemory + memorylimiter.ReadMemStatsFn = func(ms *runtime.MemStats) { + ms.Alloc = tt.memAlloc + tt.ballastSize + } + + ml, err := newMemoryLimiterProcessor(processortest.NewNopCreateSettings(), tt.mlCfg) + require.NoError(t, err) + tp, err := processorhelper.NewTracesProcessor( + context.Background(), + processortest.NewNopCreateSettings(), + tt.mlCfg, + consumertest.NewNop(), + ml.processTraces, + processorhelper.WithCapabilities(processorCapabilities), + processorhelper.WithStart(ml.start), + processorhelper.WithShutdown(ml.shutdown)) + require.NoError(t, err) + + assert.NoError(t, tp.Start(ctx, &host{ballastSize: tt.ballastSize})) + ml.memlimiter.CheckMemLimits() + err = tp.ConsumeTraces(ctx, td) + if tt.expectError { + assert.Equal(t, memorylimiter.ErrDataRefused, err) + } else { + assert.NoError(t, err) + } + assert.NoError(t, tp.Shutdown(ctx)) + }) + } + t.Cleanup(func() { + memorylimiter.GetMemoryFn = iruntime.TotalMemory + memorylimiter.ReadMemStatsFn = runtime.ReadMemStats + }) +} + +// TestLogMemoryPressureResponse manipulates results from querying memory and +// check expected side effects. +func TestLogMemoryPressureResponse(t *testing.T) { + ld := plog.NewLogs() + ctx := context.Background() + + tests := []struct { + name string + mlCfg *Config + ballastSize uint64 + memAlloc uint64 + expectError bool + }{ + { + name: "Below memAllocLimit", + mlCfg: &Config{ + CheckInterval: time.Second, + MemoryLimitPercentage: 50, + MemorySpikePercentage: 1, + }, + ballastSize: 0, + memAlloc: 800, + expectError: false, + }, + { + name: "Above memAllocLimit", + mlCfg: &Config{ + CheckInterval: time.Second, + MemoryLimitPercentage: 50, + MemorySpikePercentage: 1, + }, + ballastSize: 0, + memAlloc: 1800, + expectError: true, + }, + { + name: "Below memAllocLimit accounting for ballast", + mlCfg: &Config{ + CheckInterval: time.Second, + MemoryLimitPercentage: 50, + MemorySpikePercentage: 1, + }, + ballastSize: 1000, + memAlloc: 800, + expectError: false, + }, + { + name: "Above memAllocLimit even accounting for ballast", + mlCfg: &Config{ + CheckInterval: time.Second, + MemoryLimitPercentage: 50, + MemorySpikePercentage: 1, + }, + ballastSize: 1000, + memAlloc: 1800, + expectError: true, + }, + { + name: "Below memSpikeLimit", + mlCfg: &Config{ + CheckInterval: time.Second, + MemoryLimitPercentage: 50, + MemorySpikePercentage: 10, + }, + ballastSize: 0, + memAlloc: 800, + expectError: false, + }, + { + name: "Above memSpikeLimit", + mlCfg: &Config{ + CheckInterval: time.Second, + MemoryLimitPercentage: 50, + MemorySpikePercentage: 11, + }, + ballastSize: 0, + memAlloc: 800, + expectError: true, + }, + } + for _, tt := range tests { + t.Run(tt.name, func(t *testing.T) { + memorylimiter.GetMemoryFn = totalMemory + memorylimiter.ReadMemStatsFn = func(ms *runtime.MemStats) { + ms.Alloc = tt.memAlloc + tt.ballastSize + } + + ml, err := newMemoryLimiterProcessor(processortest.NewNopCreateSettings(), tt.mlCfg) + require.NoError(t, err) + tp, err := processorhelper.NewLogsProcessor( + context.Background(), + processortest.NewNopCreateSettings(), + tt.mlCfg, + consumertest.NewNop(), + ml.processLogs, + processorhelper.WithCapabilities(processorCapabilities), + processorhelper.WithStart(ml.start), + processorhelper.WithShutdown(ml.shutdown)) + require.NoError(t, err) + + assert.NoError(t, tp.Start(ctx, &host{ballastSize: tt.ballastSize})) + ml.memlimiter.CheckMemLimits() + err = tp.ConsumeLogs(ctx, ld) + if tt.expectError { + assert.Equal(t, memorylimiter.ErrDataRefused, err) + } else { + assert.NoError(t, err) + } + assert.NoError(t, tp.Shutdown(ctx)) + }) + } + t.Cleanup(func() { + memorylimiter.GetMemoryFn = iruntime.TotalMemory + memorylimiter.ReadMemStatsFn = runtime.ReadMemStats + }) +} + +type host struct { + ballastSize uint64 + component.Host +} + +func (h *host) GetExtensions() map[component.ID]component.Component { + ret := make(map[component.ID]component.Component) + ret[component.NewID("ballast")] = &ballastExtension{ballastSize: h.ballastSize} + return ret +} + +type ballastExtension struct { + ballastSize uint64 + component.StartFunc + component.ShutdownFunc +} + +func (be *ballastExtension) GetBallastSize() uint64 { + return be.ballastSize +} + +func totalMemory() (uint64, error) { + return uint64(2048), nil +} diff --git a/versions.yaml b/versions.yaml index 7fd7483dc42..559e4952be1 100644 --- a/versions.yaml +++ b/versions.yaml @@ -37,6 +37,7 @@ module-sets: - go.opentelemetry.io/collector/extension/auth - go.opentelemetry.io/collector/extension/ballastextension - go.opentelemetry.io/collector/extension/zpagesextension + - go.opentelemetry.io/collector/extension/memorylimiterextension - go.opentelemetry.io/collector/otelcol - go.opentelemetry.io/collector/processor - go.opentelemetry.io/collector/processor/batchprocessor