GitLab Agent Support

[jshbrntt]

Hello!

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Issue details

Connecting GitLab projects and groups to Kubernetes clusters via cluster certificates is now deprecated meaning it'll be eventually removed from a future release of GitLab.

The new method of connecting GitLab projects and groups is done through installing GitLab Agent into the Kubernetes cluster with a agent token provided after registering the agent via the project.

Currently this can be done through the Infrastructure > Kubernetes clusters section of the project settings.

After registering the agent, an agent token is returned and be used to configure the GitLab Agent on the cluster.

The GUI appears to use the GitLab GraphQL API's createClusterAgent and createClusterAgentToken operations.

I would like to be able to register an agent on a project and get the agent token as an output which can then be used to configure the GitLab Agent on the cluster.

[danielrbradley]

Note from GitLab epic:

We do NOT plan to remove the certificate based integrations

So shouldn't cause imminent production issues, but would be good to add support for the new method.