How can I put multi configmap in the same mount path in kubernetes?

Question

I have two python files, testing_1.py and testing_2.py. Then, I have created the configmap with testing-config1 to store testing_1.py and testing-config2 to store testing_2.py respectively.

In Kubernetes yaml,

...
      containers:
      - name: spark-master
        image: bde2020/spark-master:2.4.4-hadoop2.7
        volumeMounts:
        - name: testing
          mountPath: /jobs
        - name: testing2
          mountPath: /jobs
      volumes:
        - name: testing
          configMap:
            name: testing-config1
        - name: testing2
          configMap:
            name: testing-config2
...

In the final result, the path only contains testing_1.py.

What exactly structure you'd like to achieve? – Nick Feb 20 '20 at 13:16 — Nick, Feb 20 '20 at 13:16

score 2 · Accepted Answer · answered Feb 20 '20 at 15:42

You can do it by providing subPath while specifying path. Change it as below:

containers:
      - name: spark-master
        image: bde2020/spark-master:2.4.4-hadoop2.7
        volumeMounts:
        - name: testing
          mountPath: /jobs/testing_1.py
          subPath: testing_1.py
        - name: testing2
          mountPath: /jobs/testing_2.py
          subPath: testing_2.py
      volumes:
        - name: testing
          configMap:
            name: testing-config1
        - name: testing2
          configMap:
            name: testing-config2

score 1 · Answer 2 · answered Feb 20 '20 at 15:16

You can put both files in the same ConfigMap.

Or, use a projected volume:

A projected volume maps several existing volume sources into the same directory.

Currently, the following types of volume sources can be projected:

secret

downwardAPI

configMap

serviceAccountToken

How can I put multi configmap in the same mount path in kubernetes?

2 Answers2