Upgrading and rolling back Helm releases

Upgrading a Helm release refers to the process of updating an existing deployment with a new version of a Helm chart. This allows you to update the application and its resources in your Kubernetes cluster to the latest version.

Rolling back a Helm release refers to the process of undoing an upgrade and returning to a previous version of the application. This is useful in the event that an upgrade caused problems or if you need to revert to a previous version for any other reason.

Here's an example of how to upgrade and roll back a Helm release:

1. Upgrading a Helm release: To upgrade a Helm release, you can run the helm upgrade command. The helm upgrade command requires the name of the release and the path to the new chart or the name of the chart in a repository.

For example, to upgrade the myrelease Helm release to a new version of the mychart chart:

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helm upgrade myrelease mychart
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1. Rolling back a Helm release: To roll back a Helm release, you can run the helm rollback command. The helm rollback command requires the name of the release and the revision number of the previous version.

For example, to roll back the myrelease Helm release to revision 2:

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helm rollback myrelease 2
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In this example, the myrelease Helm release would be rolled back to revision 2, undoing any changes made in the upgrade and returning the application to its previous state.

In summary, upgrading and rolling back Helm releases provides a convenient way to manage and update your applications in a Kubernetes cluster. Upgrading a release allows you to update the application and its resources to the latest version, while rolling back a release allows you to undo an upgrade and return to a previous version of the application.