Wednesday, May 1, 2024

How to use Azure Devops CI CD to automate the code change straight into AKS Pods ?

 I don't want to go through the cycle of pulling images and creating pods, replicas and services? I just want to publish and push my code changed files to target location of PODS

If you want to publish and push your code changes directly to the target location within AKS pods, you can follow a different approach. Instead of rebuilding images and creating new pods, you can leverage Kubernetes features to achieve this. Here’s how:

  1. Using ConfigMaps or Secrets:

    • Kubernetes provides ConfigMaps and Secrets to manage configuration data and sensitive information.

    • Create a ConfigMap or Secret containing your code files (or relevant configuration files).

    • Mount this ConfigMap or Secret as a volume inside your existing pods.

    • Whenever you update the ConfigMap or Secret, the changes will be automatically reflected in the mounted volume within the pods.

  2. Volume Mounts:

    • Modify your existing pod deployment YAML to include a volume mount for your code files.

    • For example:

      apiVersion: v1 kind: Pod metadata: name: my-app-pod spec: containers: - name: my-app-container image: my-app-image volumeMounts: - name: code-volume mountPath: /app volumes: - name: code-volume configMap: name: my-configmap
    • In this example, the my-configmap contains your code files, and they are mounted at /app within the pod.

  3. Watch for Changes:

    • Use a tool like inotify or fsnotify inside your pod to watch for changes in the mounted directory.

    • When a file changes, trigger the necessary actions (e.g., restart your application, reload configuration, etc.).

  4. Git Sync Sidecar Container:

    • Deploy a sidecar container alongside your main application container.

    • The sidecar container continuously syncs your code from a Git repository (e.g., GitHub) into a shared volume.

    • Your main application container reads the code from this shared volume.

    • This approach allows you to update the code by simply pushing changes to your Git repository.

Remember that these approaches allow you to update code files without rebuilding images or creating new pods. Choose the one that best fits your requirements and constraints. Happy coding! 😊

If you need further assistance or have additional questions, feel free to ask! 🚀

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