topic Re: Join and form an Dynatrace Managed Cluster in Dynatrace Managed Q&A

Join and form an Dynatrace Managed Cluster

waikeat_chan — Thu, 21 Feb 2019 01:02:16 GMT

If memory serves me right (couldn't find the screenshot or log anymore), during installation of Dynatrace Managed there is an option that goes something like "do you want to join a cluster".

If I chose the option to be 'n' back then, later on can I join a new server to this Managed Server to form cluster?

And if the answer is no, is there any way I can change the value to yes now?

Re: Join and form an Dynatrace Managed Cluster

Joe_Hoffman — Thu, 21 Feb 2019 01:45:42 GMT

Anytime you install a managed node, you get to choose if it's a new cluster (first node), or if this node will be joined to an existing cluster. If you install a node and choose to create a new cluster, you cannot later have that node join a previously existing cluster. To do that, you'll need to delete the standalone node, and reinstall.

Re: Join and form an Dynatrace Managed Cluster

waikeat_chan — Thu, 21 Feb 2019 02:56:03 GMT

Hi Joseph,

Thanks for the input. Maybe I should be more specific and clear:

Re: Join and form an Dynatrace Managed Cluster

Julius_Loman — Thu, 21 Feb 2019 07:04:57 GMT

You just run the installer on XYZ (with the installer downloaded from existing cluster) and the node will join automatically. The option during interactive install is only valid if you are installing from the plain downloaded installer from mission control. (e.g not using the installer downloaded from existing node).
You don't have to setup anything on a cluster node that already exists.

Re: Join and form an Dynatrace Managed Cluster

waikeat_chan — Thu, 21 Feb 2019 08:00:39 GMT

So it means whether or not I choose 'yes' or 'no' during the installation in ABC, the XYZ would still be able to join the cluster?

Re: Join and form an Dynatrace Managed Cluster

Julius_Loman — Thu, 21 Feb 2019 09:19:25 GMT

Correct. At installation time it asks you whether you want to join an existing cluster. If you are installing the first node, you have to choose no. For other nodes, I'd use the installer downloaded from the cluster node (the one on the screenshot).

You could use the same installer as for the first node, but it would require you to specify tokens/etc... So it would be much more complicated. The installer downloaded from existing cluster node is already preconfigured and will join existing cluster automatically.