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How to use ConfigMaps and Secrets in Kubernetes?

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Sumit Rawal answered on May 13, 2023 Popularity 8/10 Helpfulness 2/10

answer How to use ConfigMaps and Secrets in Kubernetes?

How to use ConfigMaps and Secrets in Kubernetes?

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In this section, we will see how to use these K8s objects in our containerized applications.

Using ConfigMaps

ConfigMaps can be mounted as data volumes or configured as environmental variables using the configMapKeyRef flag. We can use both these approaches in our use case for database connectivity information. However, we will go ahead with mounting ConfigMaps as data volumes approach as those volumes are automatically updated.

apiVersion: v1
kind: Pod
metadata:
  name: test-web-app
  labels:
    app: test-web-app
spec:
  # Specify the Container Details
  containers:
    - name: ubuntu-app
      image: ubuntu:latest
      command: ["/bin/sleep", "3650d"]
      # Setup the volumeMounts
      volumeMounts:
      - name: database-config
        mountPath: /etc/config
      resources:
        requests:
          memory: "250Mi"
          cpu: "0.5"
        limits:
          memory: "1024Mi"
          cpu: "1"
  # Create a volume pointing to the ConfigMap
  volumes:
    - name: database-config
      configMap:
        name: app-database-config
  restartPolicy: Always

Popularity 8/10 Helpfulness 2/10 Language typescript

Source: Grepper

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Contributed on May 13 2023

Sumit Rawal

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How to use ConfigMaps and Secrets in Kubernetes?

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