OpenShift Troubleshooting

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Internal

Overview

The general technique is to increase the logging level of various OpenShift master (api, controllers) and node processes as described here:

Change the Log Level for OpenShift Processes

--loglevel=10 seems to work fine.

Then tail the journalctl log. More details on getting logging information:

OpenShift Master and Node Process Logging

Metrics Troubleshooting

oadm diagnostics MetricsApiProxy

Troubleshooting Pods

oc -n <project-name> get pods
oc -n <project-name> describe po/<pod-name>

...
Name:			logging-fluentd-3kz30
...
Node:			node2/
...
Status:			Failed
Reason:			MatchNodeSelector
Message:		Pod Predicate MatchNodeSelector failed

In-line pod logs:

oc logs -f <pod-name>

Connect to a pod:

oc rsh <pod-name>

Troubleshooting Routes

Logging

OpenShift Logging

Troubleshooting Kibana

Login loop troubleshooting:

Cases