Our hosting provider recently received several Xen Security Advisories (XSAs) that require them to perform updates to our servers. In order to apply the updates they will need to reboot all of their machines.
The maintenance window for our cluster will begin at:
2015-10-28 3:00:00 AM UTC (11PM EDT)
Starting at this time Concourse will be unavailable.
Linode has allocated a two-hour window, though the actual downtime will likely be much less. The last time similar security updates were applied our cluster was fully functioning in less than a half-hour.
These updates are required to protect the security and safe operations of not only Linode's infrastructure, but ours as well. We know that a disruption is inconvenient, but we hope you understand that these measures are warranted due to the severity of the XSAs.
Update October 27, 11:09pm EDT: The security update window has started and all systems have been shut down. The patching process has commenced.
Update October 27, 11:27pm EDT: All patches have been successfully applied and systems rebooted. We are not observing any issues following this update. However if something is amiss do not hesitate to write us.