If you have an existing cluster, you can attach the cluster to your VMware Tanzu Mission Control organization. Attaching your cluster allows you to manage the cluster on Tanzu Mission Control.
Attaching a cluster involves steps on Tanzu Mission Control and on your cluster.
For more information about what happens when you attach a cluster, see What Happens When You Attach a Cluster in VMware Tanzu Mission Control Concepts.
This task requires the following:
A running cluster that was not provisioned through Tanzu Mission Control. If you don’t have one, you can skip this section.
You have the appropriate permissions to attach the cluster.
clustergroup.editrole on the cluster group in which you want to put the new cluster.
adminpermissions to install and run the cluster agent extensions.
Do the following to attach an existing cluster to Tanzu Mission Control:
In the left navigation pane of the Tanzu Mission Control console, click Clusters.
On the Clusters page, click Attach Cluster.
Select the cluster group in which you want to register the cluster, and enter a name for the cluster.
The cluster name appears in the list of clusters on the Clusters page.
(Optional) provide a description and one or more labels.
When you click Next, Tanzu Mission Control generates a YAML manifest specifically for your cluster, and displays the
kubectl command to run the manifest.
The YAML manifest generated by Tanzu Mission Control contains credentials that permit the cluster to attach to the cluster agent service. These credentials are valid for 48 hours. If you attempt to install the agent extensions after the credentials lapse, the attachment fails and your cluster remains indefinitely in
Pendingstatus in the Tanzu Mission Control console.
If you suspect you are in this situation, locate your cluster on the Clusters page of the Tanzu Mission Control console. Select the cluster and click Detach to remove the cluster from the cluster agent service registry. Then, in your cluster, delete the
vmware-system-tmcnamespace and the following CRDs:
You can then work through the procedure again to attach the cluster.
Open a command window and connect to your cluster with
kubectl command that you copied in Tanzu Mission Control against your cluster in your
kubectl command window.
The YAML manifest runs a small set of extensions in your cluster to connect it with the cluster agent service.
After the extensions are up and running in your cluster, return to the Tanzu Mission Control console and click Verify Connection.
Although optional, it is a good idea to verify that Tanzu Mission Control and the cluster are communicating with each other.