Tried to create an SSH node. Since the only required fields seem to be node
name and node host, erased all other entries. Got the following error after
hitting OK to save:
An error has occurred
Warning: some parameters appear to be invalid. SSH node not created. To force
creation of the node with these parameters rerun the command using the --force
option. Invalid port number .
Thus it seems that at least port number is a required field and should be marked
in GUI as such.