Substitute env variable in PATH in ConfigMap in Kubernetes-CodePudding

In Kubernetes, I have the following section in deployment.yaml. I am using ConfigMap and I want to set the path dynamically. Does ConfigMap support setting path dynamically?

spec:
                  volumes:
                    - name: configmap
                      configMap:
                        name: devconfig
                        items:
                          - key: config
                            path: $(ENVIRONMENT)
                        defaultMode: 420

CodePudding user response：

This is call substitution which kubectl does not support out of the box. However, you can easily achieve what you want by using envsubst command which will substitute $ENVIRONMENT in your yaml with the the environment variable set in your current shell.

CodePudding user response：

As an alternative to envsubst, that was absolutely correct answered by @gohm's, you may wanna try to use combination of job, that will check your configmap and pass proper values to your path.

Take a look: Kubernetes: use environment variable/ConfigMap in PersistentVolume host path