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Chapter 10. Troubleshooting
The OpenTelemetry Collector offers multiple ways to measure its health as well as investigate data ingestion issues.
10.1. Getting the OpenTelemetry Collector logs
You can get the logs for the OpenTelemetry Collector as follows.
Procedure
Set the relevant log level in the
OpenTelemetryCollectorcustom resource (CR):config: | service: telemetry: logs: level: debug 1- 1
- Collector’s log level. Supported values include
info,warn,error, ordebug. Defaults toinfo.
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Use the
oc logscommand or the web console to retrieve the logs.
10.2. Exposing the metrics
The OpenTelemetry Collector exposes the metrics about the data volumes it has processed. The following metrics are for spans, although similar metrics are exposed for metrics and logs signals:
otelcol_receiver_accepted_spans- The number of spans successfully pushed into the pipeline.
otelcol_receiver_refused_spans- The number of spans that could not be pushed into the pipeline.
otelcol_exporter_sent_spans- The number of spans successfully sent to the destination.
otelcol_exporter_enqueue_failed_spans- The number of spans failed to be added to the sending queue.
The Operator creates a <cr_name>-collector-monitoring telemetry service that you can use to scrape the metrics endpoint.
Procedure
Enable the telemetry service by adding the following lines in the
OpenTelemetryCollectorcustom resource:config: | service: telemetry: metrics: address: ":8888" 1- 1
- The address at which the internal collector metrics are exposed. Defaults to
:8888.
Retrieve the metrics by running the following command, which uses the port-forwarding Collector pod:
$ oc port-forward <collector_pod>
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Access the metrics endpoint at
http://localhost:8888/metrics.
10.3. Debug exporter
You can configure the debug exporter to export the collected data to the standard output.
Procedure
Configure the
OpenTelemetryCollectorcustom resource as follows:config: | exporters: debug: verbosity: detailed service: pipelines: traces: exporters: [debug] metrics: exporters: [debug] logs: exporters: [debug]-
Use the
oc logscommand or the web console to export the logs to the standard output.
