Teach you how to quickly enable self-monitoring of Apache SkyWalking

1. Enable Prometheus telemetry data

By default, telemetry is disabled ( selector is none ), like this:

telemetry:
  selector: ${SW_TELEMETRY:none}
  none:
  prometheus:
    host: ${SW_TELEMETRY_PROMETHEUS_HOST:0.0.0.0}
    port: ${SW_TELEMETRY_PROMETHEUS_PORT:1234}
    sslEnabled: ${SW_TELEMETRY_PROMETHEUS_SSL_ENABLED:false}
    sslKeyPath: ${SW_TELEMETRY_PROMETHEUS_SSL_KEY_PATH:""}
    sslCertChainPath: ${SW_TELEMETRY_PROMETHEUS_SSL_CERT_CHAIN_PATH:""}

Prometheus can be used as a telemetry implementer. Using this function, Prometheus can collect Skywalking OAP's metrics data.

Edit config/application.yml file and set selector to prometheus , like this:

telemetry:
  selector: ${SW_TELEMETRY:prometheus}
  none:
  prometheus:
    host: ${SW_TELEMETRY_PROMETHEUS_HOST:0.0.0.0}
    port: ${SW_TELEMETRY_PROMETHEUS_PORT:1234}
    sslEnabled: ${SW_TELEMETRY_PROMETHEUS_SSL_ENABLED:false}
    sslKeyPath: ${SW_TELEMETRY_PROMETHEUS_SSL_KEY_PATH:""}
    sslCertChainPath: ${SW_TELEMETRY_PROMETHEUS_SSL_CERT_CHAIN_PATH:""}

By default, endpoints are exposed at http://0.0.0.0:1234/ and http://0.0.0.0:1234/metrics . You can also set the host and port as needed.

2. Enable Prometheus Fetcher

SkyWalking supports collecting Prometheus telemetry data directly to the OAP backend. Users can view them through the UI or the GraphQL API.

By default, Prometheus Fetcher is disabled ( active is false ), like this:

prometheus-fetcher:
  selector: ${SW_PROMETHEUS_FETCHER:default}
  default:
    active: ${SW_PROMETHEUS_FETCHER_ACTIVE:false}

Edit config/application.yml file and set active to true , like this:

prometheus-fetcher:
  selector: ${SW_PROMETHEUS_FETCHER:default}
  default:
    active: ${SW_PROMETHEUS_FETCHER_ACTIVE:true}

3. View self-monitoring data

Restart OAP to make the modified configuration file take effect.

Select SelfObservability in the UI, and then select oap-server in the service list. The effect is as follows:

Note: This article takes SkyWalking version 8.2.0 as an example. There will be slight differences if the version is different.

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