K8s configMap optional

1 개요[ | ]

k8s configMap optional

yaml

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apiVersion: v1
kind: Pod
metadata:
  name: dapi-test-pod
spec:
  containers:
  - name: test
    image: nginx
    volumeMounts:
    - name: vol
      mountPath: /test/
  volumes:
  - name: vol
    configMap:
      name: not-exists

Console

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$ kubectl apply -f a.yaml
pod/dapi-test-pod created
$ kubectl get pod dapi-test-pod
NAME            READY   STATUS              RESTARTS   AGE
dapi-test-pod   0/1     ContainerCreating   0          29s
$ kubectl describe pod dapi-test-pod | grep Events: -A9
Events:
  Type     Reason       Age               From               Message
  ----     ------       ----              ----               -------
  Normal   Scheduled    73s               default-scheduler  Successfully assigned default/dapi-test-pod to node1
  Warning  FailedMount  9s (x8 over 73s)  kubelet            MountVolume.SetUp failed for volume "vol" : configmap "not-exists" not found

yaml

Copy

apiVersion: v1
kind: Pod
metadata:
  name: dapi-test-pod
spec:
  containers:
  - name: test
    image: nginx
    volumeMounts:
    - name: vol
      mountPath: /test/
  volumes:
  - name: vol
    configMap:
      name: not-exists
      optional: true

Console

Copy

$ kubectl delete -f a.yaml; kubectl apply -f a.yaml 
pod "dapi-test-pod" deleted
pod/dapi-test-pod created
$ kubectl get pod dapi-test-pod
NAME            READY   STATUS    RESTARTS   AGE
dapi-test-pod   1/1     Running   0          9s
$ kubectl exec dapi-test-pod -it -- df | grep /test
/dev/sda1       36937420 18030912  18890124  49% /test
$ kubectl exec dapi-test-pod -it -- mount | grep /test
/dev/sda1 on /test type ext4 (ro,relatime,commit=30)
$ kubectl exec dapi-test-pod -it -- ls -alF /test
total 12
drwxrwxrwx 3 root root 4096 Jan  3 11:22 ./
drwxr-xr-x 1 root root 4096 Jan  3 11:22 ../
drwxr-xr-x 2 root root 4096 Jan  3 11:22 ..2022_01_03_11_22_44.308401016/
lrwxrwxrwx 1 root root   31 Jan  3 11:22 ..data -> ..2022_01_03_11_22_44.308401016/
$ kubectl exec dapi-test-pod -it -- ls -alF /test/..2022_01_03_11_22_44.308401016/
total 8
drwxr-xr-x 2 root root 4096 Jan  3 11:22 ./
drwxrwxrwx 3 root root 4096 Jan  3 11:22 ../

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