K
Q

exporting POD_HOST + random_string as an environment variable in a pod

4/4/2020

I am writing a statefulset and I need to export the POD_HOST+abc as an environment variable. The second environment variable should be named differently from the POD_HOST

I did something like

      env:
        - name: POD_HOST
          valueFrom:
            fieldRef:
              fieldPath: metadata.name
        - name: POD_FULL_NAME
          value: $POD_HOST"abc"

which I can see as being exported in the environment as $POD_HOST"abc". Is there a way I can make the POD_HOST resolved in the kubernetes pod before being exported in the environment

-- The_Lost_Avatar
kubernetes
kubernetes-statefulset

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1 Answer

4/4/2020

You just need to use parentheses for using environment variable inside environment variable.

Example :

      env:
      - name: POD_HOST
        valueFrom:
          fieldRef:
            apiVersion: v1
            fieldPath: metadata.name
      - name: POD_FULL_NAME
        value: $(POD_HOST)-abc
-- Fauzan
Source: StackOverflow