diff --git a/.chloggen/add-syslog-exporter.yaml b/.chloggen/add-syslog-exporter.yaml new file mode 100755 index 000000000000..5940e383cf55 --- /dev/null +++ b/.chloggen/add-syslog-exporter.yaml @@ -0,0 +1,16 @@ +# 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. filelogreceiver) +component: syslogexporter + +# A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`). +note: Add syslogexporter for sending logs to syslog server + +# One or more tracking issues related to the change +issues: [17982] + +# (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: diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS index 569d2854836f..83415b623e9e 100644 --- a/.github/CODEOWNERS +++ b/.github/CODEOWNERS @@ -76,6 +76,7 @@ exporter/signalfxexporter/ @open-telemetry/collect exporter/skywalkingexporter/ @open-telemetry/collector-contrib-approvers @liqiangz exporter/splunkhecexporter/ @open-telemetry/collector-contrib-approvers @atoulme @dmitryax exporter/sumologicexporter/ @open-telemetry/collector-contrib-approvers @sumo-drosiek +exporter/syslogexporter/ @open-telemetry/collector-contrib-approvers @kkujawa-sumo @rnishtala-sumo @astencel-sumo exporter/tanzuobservabilityexporter/ @open-telemetry/collector-contrib-approvers @oppegard @thepeterstone @keep94 exporter/tencentcloudlogserviceexporter/ @open-telemetry/collector-contrib-approvers @wgliang @yiyang5055 exporter/zipkinexporter/ @open-telemetry/collector-contrib-approvers diff --git a/.github/ISSUE_TEMPLATE/bug_report.yaml b/.github/ISSUE_TEMPLATE/bug_report.yaml index 36b06c840730..69b77b1238ad 100644 --- a/.github/ISSUE_TEMPLATE/bug_report.yaml +++ b/.github/ISSUE_TEMPLATE/bug_report.yaml @@ -70,6 +70,7 @@ body: - exporter/skywalking - exporter/splunkhec - exporter/sumologic + - exporter/syslog - exporter/tanzuobservability - exporter/tencentcloudlogservice - exporter/zipkin diff --git a/.github/ISSUE_TEMPLATE/feature_request.yaml b/.github/ISSUE_TEMPLATE/feature_request.yaml index a00addd0cb19..0c5c49257b01 100644 --- a/.github/ISSUE_TEMPLATE/feature_request.yaml +++ b/.github/ISSUE_TEMPLATE/feature_request.yaml @@ -64,6 +64,7 @@ body: - exporter/skywalking - exporter/splunkhec - exporter/sumologic + - exporter/syslog - exporter/tanzuobservability - exporter/tencentcloudlogservice - exporter/zipkin diff --git a/.github/ISSUE_TEMPLATE/other.yaml b/.github/ISSUE_TEMPLATE/other.yaml index 949f4f3c5d41..00e85ea91663 100644 --- a/.github/ISSUE_TEMPLATE/other.yaml +++ b/.github/ISSUE_TEMPLATE/other.yaml @@ -64,6 +64,7 @@ body: - exporter/skywalking - exporter/splunkhec - exporter/sumologic + - exporter/syslog - exporter/tanzuobservability - exporter/tencentcloudlogservice - exporter/zipkin diff --git a/.github/dependabot.yml b/.github/dependabot.yml index 586bb9ae9fd1..bf01d93ccc9f 100644 --- a/.github/dependabot.yml +++ b/.github/dependabot.yml @@ -272,6 +272,11 @@ updates: schedule: interval: "weekly" day: "wednesday" + - package-ecosystem: "gomod" + directory: "/exporter/syslogexporter" + schedule: + interval: "weekly" + day: "wednesday" - package-ecosystem: "gomod" directory: "/exporter/tanzuobservabilityexporter" schedule: @@ -1097,8 +1102,3 @@ updates: schedule: interval: "weekly" day: "wednesday" - - package-ecosystem: "gomod" - directory: "/receiver/windowsperfcountersreceiver" - schedule: - interval: "weekly" - day: "wednesday" diff --git a/exporter/syslogexporter/Makefile b/exporter/syslogexporter/Makefile new file mode 100644 index 000000000000..ded7a36092dc --- /dev/null +++ b/exporter/syslogexporter/Makefile @@ -0,0 +1 @@ +include ../../Makefile.Common diff --git a/exporter/syslogexporter/README.md b/exporter/syslogexporter/README.md new file mode 100644 index 000000000000..ffc17e84954c --- /dev/null +++ b/exporter/syslogexporter/README.md @@ -0,0 +1,62 @@ +# Syslog Exporter + + +| Status | | +| ------------- |-----------| +| Stability | [development]: logs | +| Distributions | [] | + +[development]: https://github.com/open-telemetry/opentelemetry-collector#development + + +The syslog exporter supports sending messages to a remote syslog server. + +- This exporter can forward syslog messages to syslog server using [RFC5424][RFC5424] and [RFC3164][RFC3164]. +- It is recommended that this syslog exporter be used with the [syslog receiver][syslog_receiver] or with [filelog receiver][filelog_receiver] along with [syslog_parser][syslog_parser] configured in the receiver, please see [examples](./examples/) + This ensures that all the syslog message headers are populated with the expected values. +- Not using the `syslog_parser` will result in the syslog message being populated with default header values. + +## Configuration + +**The following configuration options are available**: + +- `endpoint` - (required) syslog endpoint +- `network` - (default = `tcp`) tcp/udp +- `port` - (default = `514`) A syslog port +- `protocol` - (default = `rfc5424`) rfc5424/rfc3164 + - `rfc5424` - Expects the syslog messages to be rfc5424 compliant + - `rfc3164` - Expects the syslog messages to be rfc3164 compliant +- `tls` - configuration for TLS/mTLS + - `insecure` (default = `false`) whether to enable client transport security, by default, TLS is enabled. + - `cert_file` - Path to the TLS cert to use for TLS required connections. Should only be used if `insecure` is set to `false`. + - `key_file` - Path to the TLS key to use for TLS required connections. Should only be used if `insecure` is set to `false`. + - `ca_file` - Path to the CA cert. For a client this verifies the server certificate. For a server this verifies client certificates. If empty uses system root CA. Should only be used if `insecure` is set to `false`. + - `insecure_skip_verify` - (default = `false`) whether to skip verifying the certificate or not. + - `min_version` (default = `1.2`) Minimum acceptable TLS version + - `max_version` (default = `""` handled by [crypto/tls][cryptoTLS] - currently TLS 1.3) Maximum acceptable TLS version. + - `reload_interval` - Specifies the duration after which the certificate will be reloaded. If not set, it will never be reloaded. +- `retry_on_failure` + - `enabled` (default = `true`) + - `initial_interval` (default = `5s`): Time to wait after the first failure before retrying; ignored if `enabled` is `false` + - `max_interval` (default = 30s): Is the upper bound on backoff; ignored if `enabled` is `false` + - `max_elapsed_time` (default = `120s`): Is the maximum amount of time spent trying to send a batch; ignored if `enabled` is `false` +- `sending_queue` + - `enabled` (default = `false`) + - `num_consumers` (default = `10`): Number of consumers that dequeue batches; ignored if `enabled` is `false` + - `queue_size` (default = `5000`): Maximum number of batches kept in memory before data; ignored if `enabled` is `false`; + User should calculate this as `num_seconds * requests_per_second` where: + - `num_seconds` is the number of seconds to buffer in case of a backend outage + - `requests_per_second` is the average number of requests per seconds. + - `storage` (default = `none`): When set, enables persistence and uses the component specified as a storage extension for the [persistent queue][persistent_queue] +- `timeout` (default = 5s) Time to wait per individual attempt to send data to a backend + +Please see [example configurations](./examples/). + +[RFC5424]: https://www.rfc-editor.org/rfc/rfc5424 +[RFC3164]: https://www.rfc-editor.org/rfc/rfc3164 +[syslog_parser]: https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/pkg/stanza/docs/operators/syslog_parser.md +[syslog_receiver]: https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/receiver/syslogreceiver +[filelog_receiver]: https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/receiver/filelogreceiver +[cryptoTLS]: https://github.com/golang/go/blob/518889b35cb07f3e71963f2ccfc0f96ee26a51ce/src/crypto/tls/common.go#L706-L709 +[development]: https://github.com/open-telemetry/opentelemetry-collector#development +[persistent_queue]: https://github.com/open-telemetry/opentelemetry-collector/blob/main/exporter/exporterhelper/README.md#persistent-queue diff --git a/exporter/syslogexporter/config.go b/exporter/syslogexporter/config.go new file mode 100644 index 000000000000..a1188933ae08 --- /dev/null +++ b/exporter/syslogexporter/config.go @@ -0,0 +1,90 @@ +// 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 syslogexporter // import "github.com/open-telemetry/opentelemetry-collector-contrib/exporter/syslogexporter" + +import ( + "errors" + "strings" + + "go.opentelemetry.io/collector/config/configtls" + "go.opentelemetry.io/collector/exporter/exporterhelper" + "go.uber.org/multierr" +) + +var ( + errUnsupportedPort = errors.New("unsupported port: port is required, must be in the range 1-65535") + errInvalidEndpoint = errors.New("invalid endpoint: endpoint is required but it is not configured") + errUnsupportedNetwork = errors.New("unsupported network: network is required, only tcp/udp supported") + errUnsupportedProtocol = errors.New("unsupported protocol: Only rfc5424 and rfc3164 supported") +) + +// Config defines configuration for Syslog exporter. +type Config struct { + // Syslog server address + Endpoint string `mapstructure:"endpoint"` + // Syslog server port + Port int `mapstructure:"port"` + // Network for syslog communication + // options: tcp, udp + Network string `mapstructure:"network"` + // Protocol of syslog messages + // options: rfc5424, rfc3164 + Protocol string `mapstructure:"protocol"` + + // TLSSetting struct exposes TLS client configuration. + TLSSetting configtls.TLSClientSetting `mapstructure:"tls"` + + exporterhelper.QueueSettings `mapstructure:"sending_queue"` + exporterhelper.RetrySettings `mapstructure:"retry_on_failure"` + exporterhelper.TimeoutSettings `mapstructure:",squash"` // squash ensures fields are correctly decoded in embedded struct +} + +// Validate the configuration for errors. This is required by component.Config. +func (cfg *Config) Validate() error { + invalidFields := []error{} + if cfg.Port < 1 || cfg.Port > 65535 { + invalidFields = append(invalidFields, errUnsupportedPort) + } + + if cfg.Endpoint == "" { + invalidFields = append(invalidFields, errInvalidEndpoint) + } + + if strings.ToLower(cfg.Network) != "tcp" && strings.ToLower(cfg.Network) != "udp" { + invalidFields = append(invalidFields, errUnsupportedNetwork) + } + + switch cfg.Protocol { + case protocolRFC3164Str: + case protocolRFC5424Str: + default: + invalidFields = append(invalidFields, errUnsupportedProtocol) + } + + if len(invalidFields) > 0 { + return multierr.Combine(invalidFields...) + } + + return nil +} + +const ( + // Syslog Network + DefaultNetwork = "tcp" + // Syslog Port + DefaultPort = 514 + // Syslog Protocol + DefaultProtocol = "rfc5424" +) diff --git a/exporter/syslogexporter/config_test.go b/exporter/syslogexporter/config_test.go new file mode 100644 index 000000000000..c76de3aca029 --- /dev/null +++ b/exporter/syslogexporter/config_test.go @@ -0,0 +1,82 @@ +// 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 syslogexporter + +import ( + "testing" + + "github.com/stretchr/testify/assert" +) + +func TestValidate(t *testing.T) { + + tests := []struct { + name string + cfg *Config + err string + }{ + { + name: "invalid Port", + cfg: &Config{ + Port: 515444, + Endpoint: "host.domain.com", + Protocol: "rfc542", + Network: "udp", + }, + err: "unsupported port: port is required, must be in the range 1-65535; " + + "unsupported protocol: Only rfc5424 and rfc3164 supported", + }, + { + name: "invalid Endpoint", + cfg: &Config{ + Port: 514, + Endpoint: "", + Protocol: "rfc5424", + Network: "udp", + }, + err: "invalid endpoint: endpoint is required but it is not configured", + }, + { + name: "unsupported Network", + cfg: &Config{ + Port: 514, + Endpoint: "host.domain.com", + Protocol: "rfc5424", + Network: "ftp", + }, + err: "unsupported network: network is required, only tcp/udp supported", + }, + { + name: "Unsupported Protocol", + cfg: &Config{ + Port: 514, + Endpoint: "host.domain.com", + Network: "udp", + Protocol: "rfc", + }, + err: "unsupported protocol: Only rfc5424 and rfc3164 supported", + }, + } + for _, testInstance := range tests { + t.Run(testInstance.name, func(t *testing.T) { + err := testInstance.cfg.Validate() + if testInstance.err != "" { + assert.EqualError(t, err, testInstance.err) + } else { + assert.NoError(t, err) + } + }) + } +} diff --git a/exporter/syslogexporter/doc.go b/exporter/syslogexporter/doc.go new file mode 100644 index 000000000000..f231f64a5040 --- /dev/null +++ b/exporter/syslogexporter/doc.go @@ -0,0 +1,17 @@ +// 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. + +//go:generate mdatagen metadata.yaml + +package syslogexporter // import "github.com/open-telemetry/opentelemetry-collector-contrib/exporter/syslogexporter" diff --git a/exporter/syslogexporter/examples/config_with_filelog_receiver.yaml b/exporter/syslogexporter/examples/config_with_filelog_receiver.yaml new file mode 100644 index 000000000000..a4b578768e9b --- /dev/null +++ b/exporter/syslogexporter/examples/config_with_filelog_receiver.yaml @@ -0,0 +1,71 @@ +extensions: + file_storage/syslog: + directory: /tmp/otc + timeout: 10s + +exporters: + syslog: + network: tcp + port: 514 + endpoint: 127.0.0.1 + tls: + ca_file: certs/servercert.pem + cert_file: certs/cert.pem + key_file: certs/key.pem + protocol: rfc5424 + + # for below described queueing and retry related configuration please refer to: + # https://github.com/open-telemetry/opentelemetry-collector/blob/main/exporter/exporterhelper/README.md#configuration + retry_on_failure: + # default = true + enabled: true + # time to wait after the first failure before retrying; + # ignored if enabled is false, default = 5s + initial_interval: 10s + # is the upper bound on backoff; ignored if enabled is false, default = 30s + max_interval: 40s + # is the maximum amount of time spent trying to send a batch; + # ignored if enabled is false, default = 120s + max_elapsed_time: 150s + + sending_queue: + # default = false + enabled: true + # number of consumers that dequeue batches; ignored if enabled is false, + # default = 10 + num_consumers: 20 + # when set, enables persistence and uses the component specified as a storage extension for the persistent queue + # make sure to configure and add a `file_storage` extension in `service.extensions`. + # default = None + storage: file_storage/syslog + # maximum number of batches kept in memory before data; + # ignored if enabled is false, default = 5000 + # + # user should calculate this as num_seconds * requests_per_second where: + # num_seconds is the number of seconds to buffer in case of a backend outage, + # requests_per_second is the average number of requests per seconds. + queue_size: 10000 + # Time to wait per individual attempt to send data to a backend + # default = 5s + timeout: 1s +receivers: + filelog: + start_at: beginning + include: + - /other/path/**/*.txt + operators: + - type: syslog_parser + protocol: rfc5424 + +service: + telemetry: + logs: + level: "debug" + extensions: + - file_storage/syslog + pipelines: + logs: + receivers: + - filelog + exporters: + - syslog diff --git a/exporter/syslogexporter/examples/config_with_syslog_receiver.yaml b/exporter/syslogexporter/examples/config_with_syslog_receiver.yaml new file mode 100644 index 000000000000..825515e385e8 --- /dev/null +++ b/exporter/syslogexporter/examples/config_with_syslog_receiver.yaml @@ -0,0 +1,68 @@ +extensions: + file_storage/syslog: + directory: /tmp/otc + timeout: 10s + +exporters: + syslog: + network: tcp + port: 514 + endpoint: 127.0.0.1 + tls: + ca_file: certs/servercert.pem + cert_file: certs/cert.pem + key_file: certs/key.pem + protocol: rfc5424 + + # for below described queueing and retry related configuration please refer to: + # https://github.com/open-telemetry/opentelemetry-collector/blob/main/exporter/exporterhelper/README.md#configuration + retry_on_failure: + # default = true + enabled: true + # time to wait after the first failure before retrying; + # ignored if enabled is false, default = 5s + initial_interval: 10s + # is the upper bound on backoff; ignored if enabled is false, default = 30s + max_interval: 40s + # is the maximum amount of time spent trying to send a batch; + # ignored if enabled is false, default = 120s + max_elapsed_time: 150s + + sending_queue: + # default = false + enabled: true + # number of consumers that dequeue batches; ignored if enabled is false, + # default = 10 + num_consumers: 20 + # when set, enables persistence and uses the component specified as a storage extension for the persistent queue + # make sure to configure and add a `file_storage` extension in `service.extensions`. + # default = None + storage: file_storage/syslog + # maximum number of batches kept in memory before data; + # ignored if enabled is false, default = 5000 + # + # user should calculate this as num_seconds * requests_per_second where: + # num_seconds is the number of seconds to buffer in case of a backend outage, + # requests_per_second is the average number of requests per seconds. + queue_size: 10000 + # Time to wait per individual attempt to send data to a backend + # default = 5s + timeout: 1s +receivers: + syslog: + tcp: + listen_address: "0.0.0.0:6514" + protocol: rfc5424 + +service: + telemetry: + logs: + level: "debug" + extensions: + - file_storage/syslog + pipelines: + logs: + receivers: + - syslog + exporters: + - syslog diff --git a/exporter/syslogexporter/exporter.go b/exporter/syslogexporter/exporter.go new file mode 100644 index 000000000000..61b74a4052c1 --- /dev/null +++ b/exporter/syslogexporter/exporter.go @@ -0,0 +1,157 @@ +// 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 syslogexporter // import "github.com/open-telemetry/opentelemetry-collector-contrib/exporter/syslogexporter" + +import ( + "context" + "crypto/tls" + "fmt" + "strings" + "time" + + "go.opentelemetry.io/collector/consumer/consumererror" + "go.opentelemetry.io/collector/exporter" + "go.opentelemetry.io/collector/exporter/exporterhelper" + "go.opentelemetry.io/collector/pdata/pcommon" + "go.opentelemetry.io/collector/pdata/plog" + "go.uber.org/multierr" + "go.uber.org/zap" +) + +type syslogexporter struct { + config *Config + logger *zap.Logger + tlsConfig *tls.Config +} + +func initExporter(cfg *Config, createSettings exporter.CreateSettings) (*syslogexporter, error) { + tlsConfig, err := cfg.TLSSetting.LoadTLSConfig() + if err != nil { + return nil, err + } + + cfg.Network = strings.ToLower(cfg.Network) + + s := &syslogexporter{ + config: cfg, + logger: createSettings.Logger, + tlsConfig: tlsConfig, + } + + s.logger.Info("Syslog Exporter configured", + zap.String("endpoint", cfg.Endpoint), + zap.String("Protocol", cfg.Protocol), + zap.Int("port", cfg.Port), + ) + + return s, nil +} + +func newLogsExporter( + ctx context.Context, + params exporter.CreateSettings, + cfg *Config, +) (exporter.Logs, error) { + s, err := initExporter(cfg, params) + if err != nil { + return nil, fmt.Errorf("failed to initialize the logs exporter: %w", err) + } + + return exporterhelper.NewLogsExporter( + ctx, + params, + cfg, + s.pushLogsData, + exporterhelper.WithTimeout(cfg.TimeoutSettings), + exporterhelper.WithRetry(cfg.RetrySettings), + exporterhelper.WithQueue(cfg.QueueSettings), + ) +} + +func (se *syslogexporter) logsToMap(record plog.LogRecord) map[string]any { + attributes := record.Attributes().AsRaw() + return attributes +} + +func (se *syslogexporter) getTimestamp(record plog.LogRecord) time.Time { + timestamp := record.Timestamp().AsTime() + return timestamp +} + +func (se *syslogexporter) pushLogsData(ctx context.Context, ld plog.Logs) error { + type droppedResourceRecords struct { + resource pcommon.Resource + records []plog.LogRecord + } + var ( + errs []error + dropped []droppedResourceRecords + ) + rls := ld.ResourceLogs() + for i := 0; i < rls.Len(); i++ { + rl := rls.At(i) + if droppedRecords, err := se.sendSyslogs(rl); err != nil { + dropped = append(dropped, droppedResourceRecords{ + resource: rl.Resource(), + records: droppedRecords, + }) + errs = append(errs, err) + } + } + if len(dropped) > 0 { + ld = plog.NewLogs() + for i := range dropped { + rls := ld.ResourceLogs().AppendEmpty() + logRecords := rls.ScopeLogs().AppendEmpty().LogRecords().AppendEmpty() + dropped[i].resource.MoveTo(rls.Resource()) + for j := 0; j < len(dropped[i].records); j++ { + dropped[i].records[j].MoveTo(logRecords) + } + } + errs = deduplicateErrors(errs) + return consumererror.NewLogs(multierr.Combine(errs...), ld) + } + se.logger.Info("Connected successfully, exporting logs....") + return nil +} + +func (se *syslogexporter) sendSyslogs(rl plog.ResourceLogs) ([]plog.LogRecord, error) { + var ( + errs []error + droppedRecords []plog.LogRecord + ) + slgs := rl.ScopeLogs() + for i := 0; i < slgs.Len(); i++ { + slg := slgs.At(i) + for j := 0; j < slg.LogRecords().Len(); j++ { + lr := slg.LogRecords().At(j) + formattedLine := se.logsToMap(lr) + timestamp := se.getTimestamp(lr) + s, errConn := connect(se.logger, se.config, se.tlsConfig) + if errConn != nil { + droppedRecords = append(droppedRecords, lr) + errs = append(errs, errConn) + continue + } + defer s.close() + err := s.Write(formattedLine, timestamp) + if err != nil { + droppedRecords = append(droppedRecords, lr) + errs = append(errs, err) + } + } + } + return droppedRecords, multierr.Combine(errs...) +} diff --git a/exporter/syslogexporter/exporter_test.go b/exporter/syslogexporter/exporter_test.go new file mode 100644 index 000000000000..f120b1fad5ea --- /dev/null +++ b/exporter/syslogexporter/exporter_test.go @@ -0,0 +1,196 @@ +// 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 syslogexporter + +import ( + "context" + "errors" + "io" + "net" + "strconv" + "testing" + "time" + + "github.com/stretchr/testify/assert" + "github.com/stretchr/testify/require" + "go.opentelemetry.io/collector/component" + "go.opentelemetry.io/collector/consumer/consumererror" + "go.opentelemetry.io/collector/exporter" + "go.opentelemetry.io/collector/pdata/pcommon" + "go.opentelemetry.io/collector/pdata/plog" + "go.uber.org/zap" +) + +var expectedForm = "<165>1 2003-08-24T12:14:15Z 192.0.2.1 myproc 8710 - - It's time to make the do-nuts.\n" +var originalForm = "<165>1 2003-08-24T05:14:15-07:00 192.0.2.1 myproc 8710 - - It's time to make the do-nuts." + +type exporterTest struct { + srv net.TCPListener + exp *syslogexporter +} + +func exampleLog(t *testing.T) plog.LogRecord { + buffer := plog.NewLogRecord() + buffer.Body().SetStr(originalForm) + timestamp := "2003-08-24T05:14:15-07:00" + timeStr, err := time.Parse(time.RFC3339, timestamp) + require.NoError(t, err, "failed to start test syslog server") + ts := pcommon.NewTimestampFromTime(timeStr) + buffer.SetTimestamp(ts) + attrMap := map[string]any{"proc_id": "8710", "message": "It's time to make the do-nuts.", + "appname": "myproc", "hostname": "192.0.2.1", "priority": int64(165), + "version": int64(1)} + for k, v := range attrMap { + if _, ok := v.(string); ok { + buffer.Attributes().PutStr(k, v.(string)) + } else { + buffer.Attributes().PutInt(k, v.(int64)) + } + } + return buffer +} + +func LogRecordsToLogs(record plog.LogRecord) plog.Logs { + logs := plog.NewLogs() + logsSlice := logs.ResourceLogs().AppendEmpty().ScopeLogs().AppendEmpty().LogRecords() + ls := logsSlice.AppendEmpty() + record.CopyTo(ls) + return logs +} + +func createExporterCreateSettings() exporter.CreateSettings { + return exporter.CreateSettings{ + TelemetrySettings: component.TelemetrySettings{ + Logger: zap.NewNop(), + }, + } +} + +func TestInitExporter(t *testing.T) { + _, err := initExporter(&Config{Endpoint: "test.com", + Network: "tcp", + Port: 514, + Protocol: "rfc5424"}, createExporterCreateSettings()) + assert.NoError(t, err) +} + +func buildValidExporter(t *testing.T, server net.TCPListener, cfg *Config) (*syslogexporter, error) { + var port string + var err error + hostPort := server.Addr().String() + cfg.Endpoint, port, err = net.SplitHostPort(hostPort) + require.NoError(t, err, "could not parse port") + cfg.Port, err = strconv.Atoi(port) + require.NoError(t, err, "type error") + exp, err := initExporter(cfg, createExporterCreateSettings()) + require.NoError(t, err) + return exp, err +} + +func buildInvalidExporter(t *testing.T, server net.TCPListener, cfg *Config) (*syslogexporter, error) { + var port string + var err error + hostPort := server.Addr().String() + cfg.Endpoint, port, err = net.SplitHostPort(hostPort) + require.NoError(t, err, "could not parse endpoint") + require.NotNil(t, port) + invalidPort := "112" // Assign invalid port + cfg.Port, err = strconv.Atoi(invalidPort) + require.NoError(t, err, "type error") + exp, err := initExporter(cfg, createExporterCreateSettings()) + require.NoError(t, err) + return exp, err +} + +func createServer() (net.TCPListener, error) { + var addr net.TCPAddr + addr.IP = net.IP{127, 0, 0, 1} + addr.Port = 0 + testServer, err := net.ListenTCP("tcp", &addr) + return *testServer, err +} + +func prepareExporterTest(t *testing.T, cfg *Config, invalidExporter bool) *exporterTest { + // Start a test syslog server + var err error + testServer, err := createServer() + require.NoError(t, err, "failed to start test syslog server") + var exp *syslogexporter + if invalidExporter { + exp, err = buildInvalidExporter(t, testServer, cfg) + } else { + exp, err = buildValidExporter(t, testServer, cfg) + } + require.NoError(t, err, "Error building exporter") + require.NotNil(t, exp) + return &exporterTest{ + srv: testServer, + exp: exp, + } + +} + +func createTestConfig() *Config { + config := createDefaultConfig().(*Config) + config.Network = "tcp" + config.TLSSetting.Insecure = true + return config +} + +func TestSyslogExportSuccess(t *testing.T) { + test := prepareExporterTest(t, createTestConfig(), false) + require.NotNil(t, test.exp) + defer test.srv.Close() + go func() { + buffer := exampleLog(t) + logs := LogRecordsToLogs(buffer) + err := test.exp.pushLogsData(context.Background(), logs) + require.NoError(t, err, "could not send message") + }() + err := test.srv.SetDeadline(time.Now().Add(time.Second * 1)) + require.NoError(t, err, "cannot set deadline") + conn, err := test.srv.AcceptTCP() + require.NoError(t, err, "could not accept connection") + defer conn.Close() + b, err := io.ReadAll(conn) + require.NoError(t, err, "could not read all") + assert.Equal(t, string(b), expectedForm) +} + +func TestSyslogExportFail(t *testing.T) { + test := prepareExporterTest(t, createTestConfig(), true) + defer test.srv.Close() + buffer := exampleLog(t) + logs := LogRecordsToLogs(buffer) + consumerErr := test.exp.pushLogsData(context.Background(), logs) + var consumerErrorLogs consumererror.Logs + ok := errors.As(consumerErr, &consumerErrorLogs) + assert.Equal(t, ok, true) + consumerLogs := consumererror.Logs.Data(consumerErrorLogs) + rls := consumerLogs.ResourceLogs() + require.Equal(t, 1, rls.Len()) + scl := rls.At(0).ScopeLogs() + require.Equal(t, 1, scl.Len()) + lrs := scl.At(0).LogRecords() + require.Equal(t, 1, lrs.Len()) + droppedLog := lrs.At(0).Body().AsString() + err := test.srv.SetDeadline(time.Now().Add(time.Second * 1)) + require.NoError(t, err, "cannot set deadline") + conn, err := test.srv.AcceptTCP() + require.ErrorContains(t, err, "i/o timeout") + require.Nil(t, conn) + assert.ErrorContains(t, consumerErr, "dial tcp 127.0.0.1:112: connect") + assert.Equal(t, droppedLog, originalForm) +} diff --git a/exporter/syslogexporter/factory.go b/exporter/syslogexporter/factory.go new file mode 100644 index 000000000000..6d9c3980904e --- /dev/null +++ b/exporter/syslogexporter/factory.go @@ -0,0 +1,62 @@ +// 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 syslogexporter // import "github.com/open-telemetry/opentelemetry-collector-contrib/exporter/syslogexporter" + +import ( + "context" + "fmt" + + "go.opentelemetry.io/collector/component" + "go.opentelemetry.io/collector/exporter" + "go.opentelemetry.io/collector/exporter/exporterhelper" + + "github.com/open-telemetry/opentelemetry-collector-contrib/exporter/syslogexporter/internal/metadata" +) + +// NewFactory returns a new factory for the syslog exporter. +func NewFactory() exporter.Factory { + return exporter.NewFactory( + metadata.Type, + createDefaultConfig, + exporter.WithLogs(createLogsExporter, metadata.LogsStability), + ) +} + +func createDefaultConfig() component.Config { + qs := exporterhelper.NewDefaultQueueSettings() + qs.Enabled = false + + return &Config{ + Port: DefaultPort, + Network: DefaultNetwork, + Protocol: DefaultProtocol, + RetrySettings: exporterhelper.NewDefaultRetrySettings(), + QueueSettings: qs, + TimeoutSettings: exporterhelper.NewDefaultTimeoutSettings(), + } +} + +func createLogsExporter( + ctx context.Context, + params exporter.CreateSettings, + cfg component.Config, +) (exporter.Logs, error) { + exp, err := newLogsExporter(ctx, params, cfg.(*Config)) + if err != nil { + return nil, fmt.Errorf("failed to create the logs exporter: %w", err) + } + + return exp, nil +} diff --git a/exporter/syslogexporter/factory_test.go b/exporter/syslogexporter/factory_test.go new file mode 100644 index 000000000000..11dc0d622f9a --- /dev/null +++ b/exporter/syslogexporter/factory_test.go @@ -0,0 +1,57 @@ +// 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 syslogexporter + +import ( + "testing" + "time" + + "github.com/cenkalti/backoff/v4" + "github.com/stretchr/testify/assert" + "go.opentelemetry.io/collector/component" + "go.opentelemetry.io/collector/exporter/exporterhelper" +) + +func TestType(t *testing.T) { + factory := NewFactory() + pType := factory.Type() + assert.Equal(t, pType, component.Type("syslog")) +} + +func TestCreateDefaultConfig(t *testing.T) { + cfg := createDefaultConfig() + + assert.Equal(t, cfg, &Config{ + Port: 514, + Network: "tcp", + Protocol: "rfc5424", + QueueSettings: exporterhelper.QueueSettings{ + Enabled: false, + NumConsumers: 10, + QueueSize: 1000, + }, + RetrySettings: exporterhelper.RetrySettings{ + Enabled: true, + InitialInterval: 5 * time.Second, + RandomizationFactor: backoff.DefaultRandomizationFactor, + Multiplier: backoff.DefaultMultiplier, + MaxInterval: 30 * time.Second, + MaxElapsedTime: 5 * time.Minute, + }, + TimeoutSettings: exporterhelper.TimeoutSettings{ + Timeout: 5 * time.Second, + }, + }) +} diff --git a/exporter/syslogexporter/go.mod b/exporter/syslogexporter/go.mod new file mode 100644 index 000000000000..c12b16d740dc --- /dev/null +++ b/exporter/syslogexporter/go.mod @@ -0,0 +1,48 @@ +module github.com/open-telemetry/opentelemetry-collector-contrib/exporter/syslogexporter + +go 1.19 + +require ( + github.com/stretchr/testify v1.8.2 + go.opentelemetry.io/collector v0.77.0 + go.opentelemetry.io/collector/component v0.77.0 + go.opentelemetry.io/collector/exporter v0.77.0 + go.opentelemetry.io/collector/pdata v1.0.0-rcv0011 + go.uber.org/zap v1.24.0 +) + +require ( + github.com/fsnotify/fsnotify v1.6.0 // indirect + go.opentelemetry.io/collector/receiver v0.77.0 // indirect +) + +require ( + github.com/cenkalti/backoff/v4 v4.2.1 + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/gogo/protobuf v1.3.2 // indirect + github.com/golang/protobuf v1.5.3 // indirect + github.com/json-iterator/go v1.1.12 // indirect + github.com/knadh/koanf v1.5.0 // indirect + github.com/mitchellh/copystructure v1.2.0 // indirect + github.com/mitchellh/mapstructure v1.5.0 // indirect + github.com/mitchellh/reflectwalk v1.0.2 // indirect + github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect + github.com/modern-go/reflect2 v1.0.2 // indirect + github.com/pmezard/go-difflib v1.0.0 // indirect + go.opencensus.io v0.24.0 // indirect + go.opentelemetry.io/collector/confmap v0.77.0 // indirect + go.opentelemetry.io/collector/consumer v0.77.0 + go.opentelemetry.io/collector/featuregate v0.77.0 // indirect + go.opentelemetry.io/otel v1.15.1 // indirect + go.opentelemetry.io/otel/metric v0.38.1 // indirect + go.opentelemetry.io/otel/trace v1.15.1 // indirect + go.uber.org/atomic v1.10.0 // indirect + go.uber.org/multierr v1.11.0 + golang.org/x/net v0.9.0 // indirect + golang.org/x/sys v0.7.0 // indirect + golang.org/x/text v0.9.0 // indirect + google.golang.org/genproto v0.0.0-20230110181048-76db0878b65f // indirect + google.golang.org/grpc v1.54.0 // indirect + google.golang.org/protobuf v1.30.0 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect +) diff --git a/exporter/syslogexporter/go.sum b/exporter/syslogexporter/go.sum new file mode 100644 index 000000000000..0544fa4f3fda --- /dev/null +++ b/exporter/syslogexporter/go.sum @@ -0,0 +1,472 @@ +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= +contrib.go.opencensus.io/exporter/prometheus v0.4.2 h1:sqfsYl5GIY/L570iT+l93ehxaWJs2/OwXtiWwew3oAg= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc= +github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc= +github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0= +github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0= +github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho= +github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY= +github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o= +github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY= +github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8= +github.com/armon/go-radix v1.0.0/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8= +github.com/aws/aws-sdk-go-v2 v1.9.2/go.mod h1:cK/D0BBs0b/oWPIcX/Z/obahJK1TT7IPVjy53i/mX/4= +github.com/aws/aws-sdk-go-v2/config 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v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc= diff --git a/exporter/syslogexporter/internal/metadata/generated_status.go b/exporter/syslogexporter/internal/metadata/generated_status.go new file mode 100644 index 000000000000..656746c269d2 --- /dev/null +++ b/exporter/syslogexporter/internal/metadata/generated_status.go @@ -0,0 +1,12 @@ +// Code generated by mdatagen. DO NOT EDIT. + +package metadata + +import ( + "go.opentelemetry.io/collector/component" +) + +const ( + Type = "syslog" + LogsStability = component.StabilityLevelDevelopment +) diff --git a/exporter/syslogexporter/metadata.yaml b/exporter/syslogexporter/metadata.yaml new file mode 100644 index 000000000000..d4f1293e2546 --- /dev/null +++ b/exporter/syslogexporter/metadata.yaml @@ -0,0 +1,6 @@ +type: syslog + +status: + class: exporter + stability: + development: [logs] diff --git a/exporter/syslogexporter/sender.go b/exporter/syslogexporter/sender.go new file mode 100644 index 000000000000..e117697817ca --- /dev/null +++ b/exporter/syslogexporter/sender.go @@ -0,0 +1,197 @@ +// 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 syslogexporter // import "github.com/open-telemetry/opentelemetry-collector-contrib/exporter/syslogexporter" + +import ( + "crypto/tls" + "fmt" + "net" + "strings" + "sync" + "time" + + "go.uber.org/zap" +) + +const defaultPriority = 165 +const defaultFacility = 1 +const versionRFC5424 = 1 + +const protocolRFC5424Str = "rfc5424" +const protocolRFC3164Str = "rfc3164" + +const priority = "priority" +const facility = "facility" +const version = "version" +const hostname = "hostname" +const app = "appname" +const pid = "proc_id" +const msgID = "msg_id" +const structuredData = "structured_data" +const message = "message" + +const emptyValue = "-" + +type sender struct { + network string + addr string + protocol string + tlsConfig *tls.Config + logger *zap.Logger + mu sync.Mutex + conn net.Conn +} + +func connect(logger *zap.Logger, cfg *Config, tlsConfig *tls.Config) (*sender, error) { + s := &sender{ + logger: logger, + network: cfg.Network, + addr: fmt.Sprintf("%s:%d", cfg.Endpoint, cfg.Port), + protocol: cfg.Protocol, + tlsConfig: tlsConfig, + } + + s.mu.Lock() + defer s.mu.Unlock() + + err := s.dial() + if err != nil { + return nil, err + } + return s, err +} + +func (s *sender) close() error { + s.mu.Lock() + defer s.mu.Unlock() + + if s.conn != nil { + err := s.conn.Close() + s.conn = nil + return err + } + return nil +} + +func (s *sender) dial() error { + if s.conn != nil { + s.conn.Close() + s.conn = nil + } + var err error + if s.tlsConfig != nil { + s.conn, err = tls.Dial("tcp", s.addr, s.tlsConfig) + } else { + s.conn, err = net.Dial(s.network, s.addr) + } + return err +} + +func (s *sender) Write(msg map[string]any, timestamp time.Time) error { + s.mu.Lock() + defer s.mu.Unlock() + + msgStr := s.formatMsg(msg, timestamp) + + if s.conn != nil { + if err := s.write(msgStr); err == nil { + return nil + } + } + if err := s.dial(); err != nil { + return err + } + + return s.write(msgStr) +} + +func (s *sender) write(msg string) error { + // check if logs contains new line character at the end, if not add it + if !strings.HasSuffix(msg, "\n") { + msg = fmt.Sprintf("%s%s", msg, "\n") + } + _, err := fmt.Fprint(s.conn, msg) + return err +} + +func (s *sender) formatMsg(msg map[string]any, timestamp time.Time) string { + switch s.protocol { + case protocolRFC3164Str: + return s.formatRFC3164(msg, timestamp) + case protocolRFC5424Str: + return s.formatRFC5424(msg, timestamp) + default: + panic(fmt.Sprintf("unsupported syslog protocol, protocol: %s", s.protocol)) + } +} + +func (s *sender) addStructuredData(msg map[string]any) { + if s.protocol != protocolRFC5424Str { + return + } + + sd, ok := msg[structuredData].(map[string]map[string]string) + if !ok { + msg[structuredData] = emptyValue + } else { + sdElements := []string{} + for key, val := range sd { + sdElements = append(sdElements, key) + for k, v := range val { + sdElements = append(sdElements, fmt.Sprintf("%s=\"%s\"", k, v)) + } + } + msg[structuredData] = sdElements + } +} + +func populateDefaults(msg map[string]any, msgProperties []string) { + + for _, msgProperty := range msgProperties { + msgValue, ok := msg[msgProperty] + if !ok && msgProperty == priority { + msg[msgProperty] = defaultPriority + return + } + if !ok && msgProperty == version { + msg[msgProperty] = versionRFC5424 + return + } + if !ok && msgProperty == facility { + msg[msgProperty] = defaultFacility + return + } + if !ok { + msg[msgProperty] = emptyValue + return + } + msg[msgProperty] = msgValue + } +} + +func (s *sender) formatRFC3164(msg map[string]any, timestamp time.Time) string { + msgProperties := []string{priority, hostname, message} + populateDefaults(msg, msgProperties) + timestampString := timestamp.Format("2006-01-02T15:04:05.000-03:00") + return fmt.Sprintf("<%d>%s %s %s", msg[priority], timestampString, msg[hostname], msg[message]) +} + +func (s *sender) formatRFC5424(msg map[string]any, timestamp time.Time) string { + msgProperties := []string{priority, version, hostname, app, pid, msgID, message, structuredData} + populateDefaults(msg, msgProperties) + s.addStructuredData(msg) + timestampString := timestamp.Format(time.RFC3339) + return fmt.Sprintf("<%d>%d %s %s %s %s %s %s %s", msg[priority], msg[version], timestampString, msg[hostname], msg[app], msg[pid], msg[msgID], msg[structuredData], msg[message]) +} diff --git a/exporter/syslogexporter/sender_test.go b/exporter/syslogexporter/sender_test.go new file mode 100644 index 000000000000..eacac7837ef8 --- /dev/null +++ b/exporter/syslogexporter/sender_test.go @@ -0,0 +1,98 @@ +// 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 syslogexporter + +import ( + "fmt" + "regexp" + "strings" + "testing" + "time" + + "github.com/stretchr/testify/assert" +) + +func TestFormatRFC5424(t *testing.T) { + + s := sender{protocol: protocolRFC5424Str} + + msg := map[string]any{ + "timestamp": "2003-08-24T05:14:15.000003-07:00", + "appname": "myproc", + "facility": 20, + "hostname": "192.0.2.1", + "log.file.name": "syslog", + "message": "It's time to make the do-nuts.", + "priority": 165, + "proc_id": "8710", + "version": 1, + } + + expected := "<165>1 2003-08-24T05:14:15-07:00 192.0.2.1 myproc 8710 - - It's time to make the do-nuts." + timeObj1, err := time.Parse(time.RFC3339, "2003-08-24T05:14:15.000003-07:00") + assert.Equal(t, expected, s.formatRFC5424(msg, timeObj1)) + assert.Nil(t, err) + + msg2 := map[string]any{ + "timestamp": "2003-10-11T22:14:15.003Z", + "appname": "evntslog", + "facility": 20, + "hostname": "mymachine.example.com", + "log.file.name": "syslog", + "message": "BOMAn application event log entry...", + "msg_id": "ID47", + "priority": 165, + "proc_id": "111", + "version": 1, + } + + expected2 := "<165>1 2003-10-11T22:14:15Z mymachine.example.com evntslog 111 ID47 - BOMAn application event log entry..." + timeObj2, err := time.Parse(time.RFC3339, "2003-10-11T22:14:15.003Z") + assert.Nil(t, err) + assert.Equal(t, expected2, s.formatRFC5424(msg2, timeObj2)) + + msg3 := map[string]any{ + "timestamp": "2003-08-24T05:14:15.000003-07:00", + "appname": "myproc", + "facility": 20, + "hostname": "192.0.2.1", + "log.file.name": "syslog", + "message": "It's time to make the do-nuts.", + "priority": 165, + "proc_id": "8710", + "version": 1, + "structured_data": map[string]map[string]string{ + "SecureAuth@27389": { + "PEN": "27389", + "Realm": "SecureAuth0", + "UserHostAddress": "192.168.2.132", + "UserID": "Tester2", + }, + }, + } + + expectedForm := "\\<165\\>1 2003-08-24T05:14:15-07:00 192\\.0\\.2\\.1 myproc 8710 - " + + "\\[\\S+ \\S+ \\S+ \\S+ \\S+\\] It's time to make the do-nuts\\." + timeObj3, err := time.Parse(time.RFC3339, "2003-08-24T05:14:15.000003-07:00") + assert.Nil(t, err) + formattedMsg := s.formatRFC5424(msg3, timeObj3) + matched, err := regexp.MatchString(expectedForm, formattedMsg) + assert.Nil(t, err) + assert.Equal(t, true, matched, fmt.Sprintf("unexpected form of formatted message, formatted message: %s, regexp: %s", formattedMsg, expectedForm)) + assert.Equal(t, true, strings.Contains(formattedMsg, "Realm=\"SecureAuth0\"")) + assert.Equal(t, true, strings.Contains(formattedMsg, "UserHostAddress=\"192.168.2.132\"")) + assert.Equal(t, true, strings.Contains(formattedMsg, "UserID=\"Tester2\"")) + assert.Equal(t, true, strings.Contains(formattedMsg, "PEN=\"27389\"")) +} diff --git a/exporter/syslogexporter/utils.go b/exporter/syslogexporter/utils.go new file mode 100644 index 000000000000..547c242a653e --- /dev/null +++ b/exporter/syslogexporter/utils.go @@ -0,0 +1,66 @@ +// 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 syslogexporter // import "github.com/open-telemetry/opentelemetry-collector-contrib/exporter/syslogexporter" + +import "fmt" + +type errorWithCount struct { + err error + count int +} + +// deduplicateErrors replaces duplicate instances of the same error in a slice +// with a single error containing the number of times it occurred added as a suffix. +// For example, three occurrences of "error: 502 Bad Gateway" +// are replaced with a single instance of "error: 502 Bad Gateway (x3)". +func deduplicateErrors(errs []error) []error { + if len(errs) < 2 { + return errs + } + errorsWithCounts := []errorWithCount{} + for _, err := range errs { + found := false + for i := range errorsWithCounts { + if errorsWithCounts[i].err.Error() == err.Error() { + found = true + errorsWithCounts[i].count++ + break + } + } + if !found { + errorsWithCounts = append(errorsWithCounts, errorWithCount{ + err: err, + count: 1, + }) + } + } + var uniqueErrors []error + for _, errorWithCount := range errorsWithCounts { + if errorWithCount.count == 1 { + uniqueErrors = append(uniqueErrors, errorWithCount.err) + } else { + uniqueErrors = append(uniqueErrors, fmt.Errorf("%w (x%d)", errorWithCount.err, errorWithCount.count)) + } + } + return uniqueErrors +} + +func errorListToStringSlice(errList []error) []string { + errStrList := make([]string, len(errList)) + for i, err := range errList { + errStrList[i] = err.Error() + } + return errStrList +} diff --git a/exporter/syslogexporter/utils_test.go b/exporter/syslogexporter/utils_test.go new file mode 100644 index 000000000000..29b9e1d2e39f --- /dev/null +++ b/exporter/syslogexporter/utils_test.go @@ -0,0 +1,94 @@ +// 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 syslogexporter + +import ( + "errors" + "fmt" + "testing" + + "github.com/stretchr/testify/assert" +) + +func TestDeduplicateErrors(t *testing.T) { + testCases := []struct { + name string + errs []error + expected []error + }{ + { + name: "nil is returned as nil", + errs: nil, + expected: nil, + }, + { + name: "single error is returned as-is", + errs: []error{ + errors.New("Single error"), + }, + expected: []error{ + errors.New("Single error"), + }, + }, + { + name: "duplicates are removed", + errs: []error{ + errors.New("failed sending data: 502 Bad Gateway"), + errors.New("dial tcp 127.0.0.1:514: connect: connection refused"), + errors.New("failed sending data: 502 Bad Gateway"), + errors.New("dial tcp 127.0.0.1:514: connect: connection refused"), + errors.New("dial tcp 127.0.0.1:514: connect: connection refused"), + errors.New("dial tcp 127.0.0.1:514: connect: connection refused"), + errors.New("failed sending data: 504 Gateway Timeout"), + errors.New("failed sending data: 502 Bad Gateway"), + }, + expected: []error{ + fmt.Errorf("%w (x3)", errors.New("failed sending data: 502 Bad Gateway")), + fmt.Errorf("%w (x4)", errors.New("dial tcp 127.0.0.1:514: connect: connection refused")), + errors.New("failed sending data: 504 Gateway Timeout"), + }, + }, + } + + for _, testCase := range testCases { + t.Run(testCase.name, func(t *testing.T) { + assert.Equal(t, testCase.expected, deduplicateErrors(testCase.errs)) + }) + } +} + +func TestErrorString(t *testing.T) { + testCases := []struct { + name string + errs []error + expected []string + }{ + { + name: "duplicates are removed", + errs: []error{ + errors.New("failed sending data: 502 Bad Gateway"), + errors.New("dial tcp 127.0.0.1:514: connect: connection refused"), + }, + expected: []string{"failed sending data: 502 Bad Gateway", + "dial tcp 127.0.0.1:514: connect: connection refused"}, + }, + } + + for _, testCase := range testCases { + t.Run(testCase.name, func(t *testing.T) { + assert.Equal(t, testCase.expected, errorListToStringSlice(testCase.errs)) + }) + } +} diff --git a/versions.yaml b/versions.yaml index 77b8b74a574a..15c979b40af8 100644 --- a/versions.yaml +++ b/versions.yaml @@ -68,6 +68,7 @@ module-sets: - github.com/open-telemetry/opentelemetry-collector-contrib/exporter/skywalkingexporter - github.com/open-telemetry/opentelemetry-collector-contrib/exporter/splunkhecexporter - github.com/open-telemetry/opentelemetry-collector-contrib/exporter/sumologicexporter + - github.com/open-telemetry/opentelemetry-collector-contrib/exporter/syslogexporter - github.com/open-telemetry/opentelemetry-collector-contrib/exporter/tanzuobservabilityexporter - github.com/open-telemetry/opentelemetry-collector-contrib/exporter/tencentcloudlogserviceexporter - github.com/open-telemetry/opentelemetry-collector-contrib/exporter/zipkinexporter