[k8s]subpath解决cm覆盖目录问题

发现cm老覆盖容器原有目录里的内容,后来不得不通过in -s的方式来搞cm, 先将cm挂到/tmp下,然后ln -s文件到指定目录.

后来发现个cm的subpath特性可以解决这个问题

写了busybox的cm和rc测试cm subpath

cat > busybox-cm.yaml <<EOF

apiVersion: v1

kind: ConfigMap

metadata:

  name: busybox-cm

  labels:

      addonmanager.kubernetes.io/mode: EnsureExists

data:

  Corefile: |

    .:53 {

        errors

        log stdout

        health

        kubernetes cluster.local 172.21.0.0/16

        prometheus

        proxy . /etc/resolv.conf

        cache 30

    }

EOF

cat > busybox.yaml <<EOF

apiVersion: v1

kind: ReplicationController

metadata:

  name: busybox-cm

  labels:

    app: busybox-cm

spec:

  replicas: 1

  selector:

    app: busybox-cm

  template:

    metadata:

      name: busybox-cm

      labels:

        app: busybox-cm

    spec:

      containers:

      - image: busybox

        command:

          - sleep

          - "3600"

        imagePullPolicy: IfNotPresent

        name: busybox

        volumeMounts:

        - name: config-volume

          mountPath: /usr/Corefile

          subPath: Corefile

      restartPolicy: Always

      volumes:

        - name: config-volume

          configMap:

            name: busybox-cm

            items:

            - key: Corefile

              path: Corefile

EOF

巴特西

[k8s]subpath解决cm覆盖目录问题

写了busybox的cm和rc测试cm subpath

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