如何在kubernetes / openshift的init容器args中使用环境变量？

Question

这是我的部署配置的摘录：

...
spec:
  containers:
    - env:
        - name: GIT_USERNAME
          valueFrom:
            secretKeyRef:
              key: username
              name: git
        - name: GIT_PASSWORD
          valueFrom:
            secretKeyRef:
              key: password
              name: git
  initContainers:
    - args:
        - clone
        - '--single-branch'
        - '--'
        - 'https://$(GIT_USERNAME):$(GIT_PASSWORD)@someurl.com/something.git'
        - '/testing/'
      image: alpine/git
      imagePullPolicy: Always
      name: init-clone-repo
      resources: {}
      terminationMessagePath: /dev/termination-log
      terminationMessagePolicy: File
      volumeMounts:
        - mountPath: /testing
          name: test-volume
  volumes:
    - emptyDir: {}
      name: test-volume
  ...

initContainer失败，因为$（GIT_USERNAME）和$（GIT_PASSWORD）照原样使用且未扩展。 我已经尝试过$ GIT_USERNAME ， $ {GIT_USERNAME} ，但我几乎没有主意。

如何在args中为初始化容器正确使用环境变量？

Answer 1

在初始化容器中添加环境变量。

spec:
  initContainers:
    - args:
        - clone
        - '--single-branch'
        - '--'
        - 'https://$(GIT_USERNAME):$(GIT_PASSWORD)@someurl.com/something.git'
        - '/testing/'
      image: alpine/git
      imagePullPolicy: Always
      name: init-clone-repo
      env:
        - name: GIT_USERNAME
          valueFrom:
            secretKeyRef:
              key: username
              name: git
        - name: GIT_PASSWORD
          valueFrom:
            secretKeyRef:
              key: password
              name: git
      resources: {}
      terminationMessagePath: /dev/termination-log
      terminationMessagePolicy: File
      volumeMounts:
        - mountPath: /testing
          name: test-volume
  volumes:
    - emptyDir: {}
      name: test-volume