Production variable control_ip_address is not implemented

[priteau]

The variable control_ip_address described in the Production Deployments documentation is not implemented.

It should also support multiple networks rather than a single fixed IP.

[sjpb]

No, as it says it is a new variable you'd have to add. I'm not actually sure the controi node needs to have a fixed ip. And logins only did because of ssh at a client without FIPs, which is unusual. I would like to discuss this internally before progressing, the linked PR I think is not right.

[sjpb]

Actually apologies I'd misread the ternary on the PR, it is functionally OK. Think it needs discussion though on whether this is actually the right thing to be doing.

[sjpb]

We did need to add fixed IPs for all nodes for a GPFS remotemount cluster. But I don't really want to support that in the default appliance, its too weird to do for multiple networks, I think.