K8 - the server has asked for the client to provide credentials error

Error Message: the server has asked for the client to provide credentials

This error can occur when a Spacelift run remains unconfirmed for an extended period, causing the Kubernetes credentials to expire before the apply phase begins. Here’s how to address this issue effectively.

Why This Happens

In Kubernetes workflows, credentials are often generated when the Kubernetes configuration (kubecfg) is created. These credentials, managed by tools like kops, have expiration times and are typically obtained during the plan phase. However, if a run remains in an unconfirmed state for too long, the credentials may expire, resulting in this error when the apply phase is eventually executed.

Suggestion: Add a before_apply Hook to Refresh Credentials

To prevent credential expiration, add a before_apply hook to your workflow. This hook can refresh or regenerate the Kubernetes credentials just before the apply phase begins, ensuring they are valid even if the run has been sitting unconfirmed.

How to Set Up the before_apply Hook:

1. Go to your stacks hook tab.

2. Add a before_apply hook with a command to refresh or regenerate the Kubernetes credentials.

   Example command for a before_apply hook:

   kops export kubecfg --admin # Regenerate kubecfg credentials

This command ensures that fresh credentials are in place for the apply phase, regardless of how long the run remains unconfirmed.

Learn more about configuring before and after hooks here.

Summary

Using a before_apply hook to refresh credentials can prevent this error and improve the reliability of your Kubernetes runs in Spacelift. This approach ensures that credential expiration will not disrupt your workflow, even if runs are delayed before confirmation.

If you continue experiencing issues with credential expiration, please reach out to Spacelift Support for further assistance.