k8s ConfigMap使用示例：以volume或变量形式挂载到pod中

谁借莪１个温暖的怀抱￠ 2023-10-05 01:59 29阅读 0赞

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## 以Volume形式挂载cm到pod ##

`redis.properties`

[root@m-1 redis]# cat redis.properties 
    redis.host=127.0.0.1
    redis.port=6379
    redis.password=123456

`02_use-cm.yaml`

[root@m-1 redis]# cat 02_use-cm.yaml 
    apiVersion: v1
    kind: Pod
    metadata:
      name: mypod
    spec:
      containers:
      - name: busybox
        image: busybox
        command: [ "/bin/sh","-c","cat /etc/config/redis.properties" ]
        volumeMounts:
        - name: config-volume
          mountPath: /etc/config
      volumes:
      - name: config-volume
        configMap:
          name: redis-config
      restartPolicy: Never

`start.sh`

[root@m-1 redis]# cat start.sh 
    #!/usr/bin/bash
    
    if [ -z "$(sudo kubectl get cm |grep redis)" ];then
      ./01_create-redis-cm.sh
    fi
    sudo kubectl apply -f 02_use-cm.yaml

## 以变量形式挂载cm到pod ##

`cm-var.yaml`

[root@m-1 redis]# cat cm-var.yaml 
    apiVersion: v1
    kind: ConfigMap
    metadata:
      name: myconfig
    data:
      special.level: info
      special.type: hello

`cm-var-pod.yaml`

[root@m-1 redis]# cat cm-var-pod.yaml
    apiVersion: v1
    kind: Pod
    metadata:
      name: mypod
    spec:
      containers:
      - name: busybox
        image: busybox
        command: [ "/bin/sh","-c","echo ${LEVEL} ${TYPE}" ]
        env:
        - name: LEVEL
          valueFrom:
           configMapKeyRef:
             name: myconfig
             key: special.level
        - name: TYPE
          valueFrom:
            configMapKeyRef:
              name: myconfig
              key: special.type
      restartPolicy: Never

`start-cm-var.sh`

[root@m-1 redis]# cat start-cm-var.sh 
    #!/usr/bin/bash
    
    sudo kubectl apply -f cm-var.yaml
    sudo kubectl apply -f cm-var-pod.yaml

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