The network switch stack used by the oVirt PHX datacenter needs a reboot
which is scheduled for tomorrow. It is expected to be a fast task yet it
may cut all networking including shared storage access for all of our
hypervisors for a couple of minutes.
For this reason I'll shut down non-critical services beforehand and pause
CI to minimize I/O activity and protect against potential VM disk
Maintenance window: 21.12.2018 20:30 UTC - 21:30 UTC
Services that may be unreachable for short periods of time during this
* Package repositories
* Glance image repository
* Jenkins CI
Other services such as the website, gerrit and mailing lists are not
affected and will be operating as usual.
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