OpenShift Troubleshooting
Jump to navigation
Jump to search
Internal
Overview
The general technique is to increase the logging level of various OpenShift master (api, controllers) and node processes as described here:
--loglevel=10 seems to work fine.
Then tail the journalctl log. More details on getting logging information:
General Troubleshooting
Troubleshooting OpenShift Container Platform: Basics:
Master/Node Processes Troubleshooting
- OpenShift Runtime
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>
Connect to a Pod as Root
Log into the physical node running the pod. The pod - node association can be inferred executing
oc describe <pod-name>
and extracting the "Node:" value.
On the node, run
docker ps
and identify the container ID.
Then
docker exec -u 0 -it 3152a2509d92 /bin/bash
For more details on docker exec, see:
As root, various diagnostic utilities can be temporarily installed:
yum install bind-utils
Copy Files into Pods
For more details on oc cp:
Troubleshooting Routes
Troubleshooting Logging
oadm diagnostics AggregatedLogging
Troubleshooting Kibana
Troubleshooting Metrics
oadm diagnostics MetricsApiProxy