21.3. 使用案例：在 Pod 中消耗 ConfigMap

apiVersion: v1
kind: ConfigMap
metadata:
  name: special-config 
  namespace: default
data:
  special.how: very 
  special.type: charm 

apiVersion: v1
kind: ConfigMap
metadata:
  name: special-config 

  namespace: default
data:
  special.how: very 

  special.type: charm 

apiVersion: v1
kind: ConfigMap
metadata:
  name: env-config 
  namespace: default
data:
  log_level: INFO 

apiVersion: v1
kind: ConfigMap
metadata:
  name: env-config 

  namespace: default
data:
  log_level: INFO 

apiVersion: v1
kind: Pod
metadata:
  name: dapi-test-pod
spec:
  containers:
    - name: test-container
      image: gcr.io/google_containers/busybox
      command: [ "/bin/sh", "-c", "env" ]
      env: 
        - name: SPECIAL_LEVEL_KEY
          valueFrom:
            configMapKeyRef:
              name: special-config 
              key: special.how 
        - name: SPECIAL_TYPE_KEY
          valueFrom:
            configMapKeyRef:
              name: special-config 
              key: special.type 
              optional: true 
      envFrom: 
        - configMapRef:
            name: env-config 
  restartPolicy: Never

apiVersion: v1
kind: Pod
metadata:
  name: dapi-test-pod
spec:
  containers:
    - name: test-container
      image: gcr.io/google_containers/busybox
      command: [ "/bin/sh", "-c", "env" ]
      env: 

        - name: SPECIAL_LEVEL_KEY
          valueFrom:
            configMapKeyRef:
              name: special-config 

              key: special.how 

        - name: SPECIAL_TYPE_KEY
          valueFrom:
            configMapKeyRef:
              name: special-config 

              key: special.type 

              optional: true 

      envFrom: 

        - configMapRef:
            name: env-config 

  restartPolicy: Never