How to use environment variables in init container args in kubernetes/openshift?












2















This is an excerpt of my deployment config:



...
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
...


The initContainer fails, because $(GIT_USERNAME) and $(GIT_PASSWORD) are used as is and not expanded. I have tried $GIT_USERNAME, ${GIT_USERNAME} and I am pretty much out of ideas.



How do I correctly use environment variables in args for init containers?










share|improve this question



























    2















    This is an excerpt of my deployment config:



    ...
    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
    ...


    The initContainer fails, because $(GIT_USERNAME) and $(GIT_PASSWORD) are used as is and not expanded. I have tried $GIT_USERNAME, ${GIT_USERNAME} and I am pretty much out of ideas.



    How do I correctly use environment variables in args for init containers?










    share|improve this question

























      2












      2








      2








      This is an excerpt of my deployment config:



      ...
      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
      ...


      The initContainer fails, because $(GIT_USERNAME) and $(GIT_PASSWORD) are used as is and not expanded. I have tried $GIT_USERNAME, ${GIT_USERNAME} and I am pretty much out of ideas.



      How do I correctly use environment variables in args for init containers?










      share|improve this question














      This is an excerpt of my deployment config:



      ...
      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
      ...


      The initContainer fails, because $(GIT_USERNAME) and $(GIT_PASSWORD) are used as is and not expanded. I have tried $GIT_USERNAME, ${GIT_USERNAME} and I am pretty much out of ideas.



      How do I correctly use environment variables in args for init containers?







      git docker kubernetes containers openshift






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 13 '18 at 6:49









      wedererwederer

      122111




      122111
























          1 Answer
          1






          active

          oldest

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          2














          Add environment variable in the init container.



          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





          share|improve this answer


























          • Yes, that was it. Thank you!

            – wederer
            Nov 13 '18 at 9:15











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          1 Answer
          1






          active

          oldest

          votes








          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          2














          Add environment variable in the init container.



          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





          share|improve this answer


























          • Yes, that was it. Thank you!

            – wederer
            Nov 13 '18 at 9:15
















          2














          Add environment variable in the init container.



          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





          share|improve this answer


























          • Yes, that was it. Thank you!

            – wederer
            Nov 13 '18 at 9:15














          2












          2








          2







          Add environment variable in the init container.



          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





          share|improve this answer















          Add environment variable in the init container.



          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






          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited Nov 13 '18 at 8:05

























          answered Nov 13 '18 at 7:24









          nightfury1204nightfury1204

          1,58148




          1,58148













          • Yes, that was it. Thank you!

            – wederer
            Nov 13 '18 at 9:15



















          • Yes, that was it. Thank you!

            – wederer
            Nov 13 '18 at 9:15

















          Yes, that was it. Thank you!

          – wederer
          Nov 13 '18 at 9:15





          Yes, that was it. Thank you!

          – wederer
          Nov 13 '18 at 9:15


















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