如何在 kubernetes/openshift 中的 init 容器参数中使用环境变量？

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)按原样使用而不是扩展。我已经尝试过$GIT_USERNAME，${GIT_USERNAME}并且我几乎没有想法。

如何在 args 中为 init 容器正确使用环境变量？

Answer 1

在 init 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