Modify Heapster logging verbosity

Solution Unverified - Updated

Environment

  • Red Hat OpenShift Enterprise
    • 3.1 - 3.11

Issue

  • Whats wrong with heapster?
  • How do I enable debug logging for heapster?
  • I need more information from the heapster pod
  • Heapster logging level is too high
  • How to reduce the logging level for heapster?

Resolution

LEVEL Description
3 Standard Logs
4 Debug
6 Display Requested Resources
7 HTTP Request Headers
8 (MAX) HTTP Request Content
- To modify the verbosity of logging for the heapster component, you will need to modify the replicationController (RC) and add an additional container command. - You can [manually](#manual) edit the RC `oc edit rc heapster` and add that to the file or use the following command to drop it into place: 
oc patch rc heapster -p '{"spec":{"template":{"spec":{"containers":[{"command":"--vmodule=*=<LEVEL>"}]}}}}'
  • After you add this environment variable you should scale your heapster pod down to 0 and then back up to 1.
oc scale rc --replicas=0 heapster
oc scale rc --replicas=1 heapster

Manual steps to add the debug logs

  • First, Edit heapster's replicationController:
oc edit rc heapster
  • Next, Add vmodule:
    • Add - --vmodule=*=<LEVEL> under the spec.containers.command.
      (e.g)
    spec:
      containers:
      - command:
         ... snip ...
        - --vmodule=*=<LEVEL>
  • Finally, Scale re-deploy heapster pod by scale down/up.
oc scale rc --replicas=0 heapster
oc scale rc --replicas=1 heapster
SBR
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