major outage: kvm4 down, affected: eugeni (mail, lists), alberti (ldap), pauli (puppet), rouyi (jenkins), etc
During a security reboot today, kvm4.torproject.org did not return. All virtual machines on this host are down and unavailable.
According to the Nextcloud spreadsheet (since LDAP is down), that includes:
|alberti||LDAP, db.tpo||critical, no passwd change||read-only copies everywhere|
|eugeni||incoming mail, lists||critical, total outage||peek at
|meronense||metrics.tpo||critical, total outage||?|
|neriniflorum||DNS||redundant, higher TTFB?||possible to remove from rotation|
|pauli||puppet||major, no config management||use
|rouyi||jenkins||critical, total outage||?|
|web-hetzner-01||web mirror||redundant, no effect?||removed from rotation automatically|
|weissi||build box||no windows builds||N/A|
|woronowii||build box||no windows builds||N/A|
I'll note that it seems both windows build boxes are on the same machine so even if jenkins would be able to dispatch builds, we wouldn't be able to do those...
A ticket was filed with Hetzner to try and rescue the server.
Our disaster recover plan so far is to wait for that rescue to succeed, which might take up to 24h but hopefully less.
If that fails, I would suggest the following plan:
- recover eugeni, pauli, alberti from backups on gnt-fsn or elsewhere (we need those three to build new machines)
- build a new ganeti cluster (because we can't recover all of this on gnt-fsn)
- restore remaining machines on the new cluster
- decommission kvm4 officially
This could take a few days of work. :(