steffan-westcott.clj-otel.sdk.otel-sdk — com.github.steffan-westcott/clj-otel-sdk 0.1.4

Programmatic configuration of the OpenTelemetry SDK.

close-otel-sdk! clj

(close-otel-sdk!)

Shut down activities of OpenTelemetrySdk instance previously configured by init-otel-sdk!.

init-otel-sdk! clj

(init-otel-sdk! service-name
                {:keys [resources tracer-provider propagators]
                 :or {propagators [(w3c-trace/w3c-trace-context-propagator)
                                   (w3c-baggage/w3c-baggage-propagator)]}})

Configure an OpenTelemetrySdk instance and set as the global OpenTelemetry instance. service-name is the service name given to the resource emitting telemetry. This function may be evaluated once only. Attempts to evaluate this more than once will result in error.

Takes a nested option map as described in the following sections. Some options can take either an option map or an equivalent fully configured Java object.

Top level option map

key	description
:resources	Collection of resources to merge with default SDK resource and service-name resource. Each resource in the collection is either a Resource instance or a map with keys :attributes (required) and :schema-url (optional). The merged resource describes the source of telemetry and is attached to emitted data (default: nil)
:tracer-provider	Required options map (see below) to configure SdkTracerProvider instance.
:propagators	Collection of TextMapPropagator instances used to inject and extract context information using HTTP headers (default: W3C Trace Context and W3C Baggage text map propagators).

:tracer-provider option map

key	description
:span-processors	Collection of option maps (see table below) or SpanProcessor instances. Each member specifies a collection of span exporters and batching to apply to those exporters (default: []).
:span-limits	Option map (see table below), SpanLimits, Supplier or fn which returns span limits (default: same as {}).
:sampler	Option map (see table below) or Sampler instance, specifies strategy for sampling spans (default: same as {:parent-based {}}).
:id-generator	IdGenerator instance for generating ids for spans and traces (default: platform specific IdGenerator).
:clock	Clock instance used for time reading operations (default: system clock).

:span-processors member option map

key	description
:exporters	Collection of SpanExporter instances, used to export spans to processing and reporting backends.
:batch?	If true, batches spans for export. If false then export spans individually; generally meant for debug logging exporters only. All options other than :exporters are ignored when :batch is false (default: true).
:schedule-delay	Delay interval between consecutive batched exports. Value is either a Duration or a vector [amount ^TimeUnit unit] (default: 5000ms).
:exporter-timeout	Maximum time a batched export will be allowed to run before being cancelled. Value is either a Duration or a vector [amount ^TimeUnit unit] (default: 30000ms).
:max-queue-size	Maximum number of spans kept in queue before start dropping (default: 2048).
:max-export-batch-size	Maximum batch size for every export, must be smaller or equal to :max-queue-size (default: 512).

:span-limits option map

key	description
:max-attrs	Maximum number of attributes per span (default: 128).
:max-events	Maximum number of events per span (default: 128).
:max-links	Maximum number of links per span (default: 128).
:max-attrs-per-event	Maximum number of attributes per event (default: 128).
:max-attrs-per-link	Maximum number of attributes per link (default: 128).
:max-attr-value-len	Maximum length of string attribute values and each element of string array attribute values (default: no maximum).

:sampler option map (one option only)

key	description
:always	With value :on always record and export all spans. With value :off drop all spans.
:ratio	double in range [0.0, 1.0], describing the ratio of spans to be sampled.
:parent-based	Option map (see table below), describing sampling decisions based on the parent span.

:parent-based option map

key	description
:root	Option map (see :sampler table above) or Sampler to use when no parent span is present (default: same as {:always :on}).
:remote-parent-sampled	Option map (see :sampler table above) or Sampler to use when there is a remote parent that was sampled (default: same as {:always :on}).
:remote-parent-not-sampled	Option map (see :sampler table above) or Sampler to use when there is a remote parent that was not sampled (default: same as {:always :off}).
:local-parent-sampled	Option map (see :sampler table above) or Sampler to use when there is a local parent that was sampled (default: same as {:always :on}).
:local-parent-not-sampled	Option map (see :sampler table above) or Sampler to use when there is a local parent that was not sampled (default: same as {:always :off}).