10.2.3. Injecting content into a volume by using config maps


You can inject content into a volume by using config maps.

Example ConfigMap custom resource (CR)

apiVersion: v1
kind: ConfigMap
metadata:
  name: special-config
  namespace: default
data:
  special.how: very
  special.type: charm

Procedure

You have a couple different options for injecting content into a volume by using config maps.

  • The most basic way to inject content into a volume by using a config map is to populate the volume with files where the key is the file name and the content of the file is the value of the key:

    apiVersion: v1
    kind: Pod
    metadata:
      name: dapi-test-pod
    spec:
      securityContext:
        runAsNonRoot: true
        seccompProfile:
          type: RuntimeDefault
      containers:
        - name: test-container
          image: gcr.io/google_containers/busybox
          command: [ "/bin/sh", "-c", "cat", "/etc/config/special.how" ]
          volumeMounts:
          - name: config-volume
            mountPath: /etc/config
          securityContext:
            allowPrivilegeEscalation: false
            capabilities:
              drop: [ALL]
      volumes:
        - name: config-volume
          configMap:
            name: special-config 
    1
    
      restartPolicy: Never
    1
    File containing key.

    When this pod is run, the output of the cat command will be:

    very
  • You can also control the paths within the volume where config map keys are projected:

    apiVersion: v1
    kind: Pod
    metadata:
      name: dapi-test-pod
    spec:
      securityContext:
        runAsNonRoot: true
        seccompProfile:
          type: RuntimeDefault
      containers:
        - name: test-container
          image: gcr.io/google_containers/busybox
          command: [ "/bin/sh", "-c", "cat", "/etc/config/path/to/special-key" ]
          volumeMounts:
          - name: config-volume
            mountPath: /etc/config
          securityContext:
            allowPrivilegeEscalation: false
            capabilities:
              drop: [ALL]
      volumes:
        - name: config-volume
          configMap:
            name: special-config
            items:
            - key: special.how
              path: path/to/special-key 
    1
    
      restartPolicy: Never
    1
    Path to config map key.

    When this pod is run, the output of the cat command will be:

    very
Red Hat logoGithubredditYoutubeTwitter

자세한 정보

평가판, 구매 및 판매

커뮤니티

Red Hat 소개

Red Hat은 기업이 핵심 데이터 센터에서 네트워크 에지에 이르기까지 플랫폼과 환경 전반에서 더 쉽게 작업할 수 있도록 강화된 솔루션을 제공합니다.

보다 포괄적 수용을 위한 오픈 소스 용어 교체

Red Hat은 코드, 문서, 웹 속성에서 문제가 있는 언어를 교체하기 위해 최선을 다하고 있습니다. 자세한 내용은 다음을 참조하세요.Red Hat 블로그.

Red Hat 문서 정보

Legal Notice

Theme

© 2026 Red Hat
맨 위로 이동