Introduction

Helm, the package manager for Kubernetes, provides powerful tools for managing deployed releases. In scenarios where a release update causes issues or unexpected behavior, the helm rollback command offers a straightforward solution. In this article, we'll focus on the helm rollback command, exploring its functionality, and provide a step-by-step guide along with a practical example to demonstrate how to roll back deployed releases effectively using Helm.

1. Understanding helm rollback Command: The helm rollback command is used to revert a deployed release to a previous version. It allows users to roll back to a known stable state in case of issues or errors introduced by a recent upgrade.

2. Rolling Back a Deployed Release: Let's consider a scenario where a deployed release named "my-release" encounters issues after an upgrade. We'll use the helm rollback command to revert to the previous version.

   Example:

    $ helm rollback my-release 1
   

   Output:

    Rollback was a success. Happy Helming!
   

   • The output confirms the successful rollback of the deployed release "my-release" to revision 1.

   • It provides a reassuring message ("Happy Helming!") to indicate that the rollback operation was completed successfully.

3. Interpreting the Output:

   • The output confirms that the rollback process was successful, and the deployed release has been reverted to the specified revision.

   • It indicates that the rollback operation was completed without issues, ensuring that the application is restored to a known stable state.

4. Verifying Rollback: Users can verify that the rollback was successful by checking the status of the deployed release using the helm status command.

   Example:

    $ helm status my-release
   

   Output:

    STATUS: deployed
   

   • The output confirms that the status of the deployed release "my-release" is "deployed", indicating that the rollback was successful.

Conclusion

The helm rollback command is an essential tool for managing deployed releases in Kubernetes environments, providing a reliable mechanism to revert to a known stable state in case of issues or errors introduced by a recent upgrade. By understanding how to use the helm rollback command and interpreting its output, users can effectively manage and maintain application stability using Helm.