I have limited number of servers and since it is a small setup it would be a waste to have a server dedicated to the cluster controller.
I was wondering if it can be installed on a VM on my laptop so whenever I make changes I just turn it on and use it.
If that is possible could the cluster controller be moved to a physical server later when the environment gets larger?
I am not an expert here, but I don't see a reason not to do this, as long as the VM gets a static IP. By having all the data on the VM, you actually gain an advantage by having the ability to move the VM to a more powerful machine if you need to, to without having to worry about migration the configuration DB or files.
With that being said, I am not sure how to actually migrate the VM's data to a physical server without having to redefine the cluster again.
Tip: The controller should not use much CPU, but In case you are using juju and you see the controller get bogged down due to "nonce already used" do this workaround: https://bugs.launchpad.net/maas/+bug/1190986
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