How to change log level for istio-proxy within a Deployment?

Solution Verified - Updated -

Environment

  • OpenShift Container Platform
    • 4.9 and later
  • Red Hat OpenShift Service Mesh
    • 2.1 and later

Issue

  • How to change log level for istio-proxywithin a Deployment?
  • Need to enable verbose logging for istio-proxy for troubleshooting purposes.

Resolution

  • Changing istio-proxy log level in your Deployment by adding the annotation sidecar.istio.io/logLevel:

    $ oc edit deployment $<DEPLOYMENT_NAME>
[...]
spec:
template:
  metadata:
    annotations:
      "sidecar.istio.io/logLevel": debug # level can be: trace, debug, info, warning, error, critical, off

    Note:- The annotation sidecar.istio.io/logLevel will get the log level only for the istio-proxy which wraps the envoy logs as well.

  • The pod will restart after changing the annotation.

Root Cause

For debugging reasons, sometimes the log level needs to be adjusted to a more verbose level.

Diagnostic Steps

  • After change the log level use the following command to check the istio-proxy log:

    $ oc logs $<POD_NAME> -c istio-proxy

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