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Collecting Kubernetes Pod logs

When you deploy SigNoz to your kubernetes cluster it will automatically start collecting all the pod logs. It will automatically parse out different attributes from the logs like name, namespace, container name, uid etc. But if you want to parse specific attributes from certain kind of logs you can use different kinds of operators provided by opentelemetry here

Steps to disable automatic pod logs collection​

  • Modify/Create the override-values.yaml file

    k8s-infra:
      presets:
        logsCollection:
          enabled: false

    You can apply this yaml file by running the following command

    helm -n platform upgrade my-release signoz/signoz -f override-values.yaml

    In case of external K8s cluster where only k8s-infra chart is installed, users can disable log collections by including the following in override-values.yaml :

    presets:
      logsCollection:
        enabled: false

    You can apply this yaml file by running the following command

    helm -n platform upgrade my-release signoz/k8s-infra -f override-values.yaml

    Once the above is applied to your k8s cluster, logs collection will be disabled.

Steps to Filter/Exclude logs collection​

  • Excluding certain log files : If you want to exclude logs of certain pods/namespace you can do it using the following config in override-values.yaml.
    k8s-infra:
    presets:
      logCollection:
        # whether to enable log collection
        enabled: true
        blacklist:
          # whether to enable blacklisting
          enabled: true
          # whether to exclude signoz logs
          signozLogs: false
          # which namespaces to exclude
          namespaces:
            - kube-system
          # which pods to exclude
          pods:
            - hotrod
            - locust
          # which containers to exclude
          containers: []
          # additional exclude rules
          additionalExclude: []

  • Using filter operator in filelog receiver : You can also use the filter operator to filter out logs by changing the operators here charts.

    ....
      operators:
        - type: filter
          expr: 'body matches "^LOG: .* END$"'
          drop_ratio: 1.0
    ....

    Here we are matching logs using an expression and dropping the entire log by setting drop_ratio: 1.0 . You can read more about the filter operator here

  • Now you can restart the otel collector pod so that new changes are applied.