[Labs-announce] Wikitech maintenance and CI downtime tomorrow, 2015-02-12 16:00 UTC

[Andrew Bogott]

Executive summary:

     CI tests won't run for a while tomorrow.  Also you won't be able to 
log into Wikitech.  This will begin at 16:00 UTC (8:00 AM in California) 
and may take a couple of hours.

Full story:

     As part of a long-overdue tech-debt payment[0], I'll be migrating 
all of the Labs project, membership and role data from ldap into 
mysql[1].  Keystone (the Labs Openstack authentication layer) will be 
shut off briefly, and subsequently will have incomplete data while 
things are gradually copied over from Ldap.
     At the same time, Alex will be rolling out a bunch of 
OpenStackManager patches[2] to cope with the new reality.  I've tested 
these quite a lot, but no doubt there will be unexpected issues with 
such a big refactor.

     Existing, running labs and tools sessions should not be affected.  
New instance creation will be disabled for part of the window, which 
will prevent CI from starting new tests.  Wikitech login will be 
disabled, and users will have to login afresh after logins are restored.

     There is, unfortunately, no user-facing improvement associated with 
this update.  If all goes perfectly, Wikitech will be restored to its 
original state but be slightly slower.  If, after the update, anyone 
encounters new Wikitech issues (and I emphasize the NEW), please open a 
phab ticket and inform me immediately.

     As always, in the worst case scenario you can refer to our doc site 
of last resort, https://wikitech-static.wikimedia.org


-Andrew


[0] https://phabricator.wikimedia.org/T115029
[1] https://wikitech.wikimedia.org/wiki/Labs_keystone_roles
[2] The patchset begins with https://gerrit.wikimedia.org/r/#/c/252615/