How to add ConfigMap data to a Volume in a Pod

Question

Hi Guys,

I have created a ConfigMap. I want to add the data of ConfigMap to my Container. How can I do that?

Answer 1

Hi@akhtar,

When you create a ConfigMap using --from-file, the filename becomes a key stored in the data section of the ConfigMap. The file contents become the key's value. Now to add the ConfigMap name under the volumes section of the Pod specification. This adds the ConfigMap data to the directory specified as volumeMounts.mountPath. The command section lists directory files with names that match the keys in ConfigMap. You can also see the below example.

apiVersion: v1
kind: Pod
metadata:
  name: dapi-test-pod
spec:
  containers:
    - name: test-container
      image: k8s.gcr.io/busybox
      command: [ "/bin/sh", "-c", "ls /etc/config/" ]
      volumeMounts:
      - name: config-volume
        mountPath: /etc/config
  volumes:
    - name: config-volume
      configMap:
        name: special-config
  restartPolicy: Never