I'm trying to learn configuring Kubernetes and am currently studying configuring pods with configmaps.
I just created a simple pod with nginx, trying to link it to a configmap called options with the following yaml file:
apiVersion: v1
kind: Pod
metadata:
creationTimestamp: null
labels:
run: pod
name: pod
spec:
containers:
- image: nginx
name: pod
resources: {}
env:
- name: options
valueFrom:
configMapKeyRef:
name: option
key: var5
dnsPolicy: ClusterFirst
restartPolicy: Always
status: {}
When looking at my pods, I see a CreateContainerConfigError error. My question is:
How can you debug a pod that has a config error? I am not interested in what went wrong in this specific case, is it possible to, for example, go into the pod and see what was wrong?
1 Answer
Run kubectl describe pod <podname> -n <namespace>, you might see the cause of failing.
If pod not started then you can not exec into pod, In this case run kubectl get pods -o wide and check in which node the pod is scheduled. Go to that node and run docker ps -a and get the container id desired container. then check docker logs -f <container id>
