Comment 6 for bug 1642165

Nailgun does not support a removal of some deployed role from a node for now. Let's say some node has deployed roles: role A and role B. To remove role A from the node (at least from UI) User need to remove the node from the environment and then add it with role B only and redeploy.

So, the ticket can be closed for now. Adding of new role to deployed node was supported on UI.