We will have a scheduled maintenance window tonight from 7:00pm to 11:00pm PST. The following changes will take place:
- 7:00pm – Upgrade the server ‘mradm01′ from RHEL4 to RHEL5 (bug 542454). Actual downtime is expected to be 30 minutes or less, but it may take through the end of the window to get all services completely functional again afterwards. This server hosts ns1.mozilla.org (DNS server) and the nagios slave (facility-wide system monitoring) for the MPT colo facility. DNS services are redundant (ns2 and ns3 will pick up the slack). We will be without monitoring in the MPT colo facility while the server is being upgraded, however. This means any problems that are normally automatically detected and cause the oncall sysadmin to get paged will not be detected or paged about during the outage. We ask that if anyone observes any such problems during the window that you report them in the #bmo channel on irc.mozilla.org (click the link to go there via your browser).
Please let me know if you have any reason why we should not proceed with this planned maintenance. As always, we aim to keep downtime to as little as possible, but unexpected complications can arise causing longer downtime periods than expected. All systems should be operational by the end of the maintenance window.
Feel free to comment directly if you see issues past the planned downtime.