Introduced in GitLab 11.11.
Similar to project-level and group-level Kubernetes clusters, instance-level Kubernetes clusters allow you to connect a Kubernetes cluster to the GitLab instance, which enables you to use the same cluster across multiple projects.
GitLab will try match to clusters in the following order:
- Project-level clusters
- Group-level clusters
- Instance level
To be selected, the cluster must be enabled and match the environment selector.