extension/

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Version: v0.31.0 Latest Latest
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Published: Jul 27, 2021 License: Apache-2.0

README

General Information

Extensions provide capabilities on top of the primary functionality of the collector. Generally, extensions are used for implementing components that can be added to the Collector, but which do not require direct access to telemetry data and are not part of the pipelines (like receivers, processors or exporters). Example extensions are: Health Check extension that responds to health check requests or PProf extension that allows fetching Collector's performance profile.

Supported service extensions (sorted alphabetically):

The contributors repository may have more extensions that can be added to custom builds of the Collector.

Ordering Extensions

The order extensions are specified for the service is important as this is the order in which each extension will be started and the reverse order in which they will be shutdown. The ordering is determined in the extensions tag under the service tag in the configuration file, example:

service:
  # Extensions specified below are going to be loaded by the service in the
  # order given below, and shutdown on reverse order.
  extensions: [health_check, pprof, zpages]

Extensions

Health Check

Health Check extension enables an HTTP url that can be probed to check the status of the OpenTelemetry Collector. This extension can be used as a liveness and/or readiness probe on Kubernetes.

The following settings are required:

  • port (default = 13133): What port to expose HTTP health information.

Example:

extensions:
  health_check:

The full list of settings exposed for this exporter is documented here with detailed sample configurations here.

Performance Profiler

Performance Profiler extension enables the golang net/http/pprof endpoint. This is typically used by developers to collect performance profiles and investigate issues with the service.

The following settings are required:

The following settings can be optionally configured:

  • save_to_file: File name to save the CPU profile to. The profiling starts when the Collector starts and is saved to the file when the Collector is terminated.

Example:

extensions:
  pprof:

The full list of settings exposed for this exporter are documented here with detailed sample configurations here.

zPages

Enables an extension that serves zPages, an HTTP endpoint that provides live data for debugging different components that were properly instrumented for such. All core exporters and receivers provide some zPages instrumentation.

The following settings are required:

  • endpoint (default = localhost:55679): Specifies the HTTP endpoint that serves zPages.

Example:

extensions:
  zpages:

The full list of settings exposed for this exporter are documented here with detailed sample configurations here.

Directories

Path Synopsis
Package healthcheckextension implements an extension that enables an HTTP endpoint that can be used to check the overall health and status of the service.
Package healthcheckextension implements an extension that enables an HTTP endpoint that can be used to check the overall health and status of the service.
Package pprofextension implements an extension that exposes the golang net/http/pprof (Performance Profiler) in a HTTP endpoint.
Package pprofextension implements an extension that exposes the golang net/http/pprof (Performance Profiler) in a HTTP endpoint.
Package zpagesextension implements an extension that exposes zPages of properly instrumented components.
Package zpagesextension implements an extension that exposes zPages of properly instrumented components.

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