For T232429: Create in-cloud, cloud-vps-wide cumin masters I was looking at what hosts are *not* currently responding to cumin. One of them is this host with this error:
ssh: connect to host af-nb-db-2.automation-framework.eqiad.wmflabs port 22: No route to host
Now that's interesting, that should never happen for a host under eqiad.wmflabs, ever. It turns out that the IP in Designate for this is 172.16.6.245, but openstack-browser reveals something strange about the networking setup on this instance:
It has two internal IP addresses listed, the second of them being 172.16.6.244. It turns out that IP *does* function:
krenair@cloud-cumin-01:~$ ssh 172.16.6.244 Permission denied (publickey).
(keys are broken there but that's a minor thing in comparison)
Why and how does this host have multiple internal IPs? What should happen if a host ends up with this?