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Switch to Linux 3.19 by default on jessie hosts
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Description

The switch in d-i has been made here, but not yet merged to production:
https://gerrit.wikimedia.org/r/#/c/211688/

Event Timeline

faidon raised the priority of this task from to Medium.
faidon updated the task description. (Show Details)
faidon added a project: acl*sre-team.
faidon added subscribers: faidon, MoritzMuehlenhoff, BBlack.

Change 211688 had a related patch set uploaded (by Muehlenhoff):
Use 3.19 on jessie by default (Bug: T97411, Bug: T100773)

https://gerrit.wikimedia.org/r/211688

Change 211688 had a related patch set uploaded (by Faidon Liambotis):
autoinstall: install linux-meta (3.19) on jessie

https://gerrit.wikimedia.org/r/211688

Besides switching the default (which is about to be committed), we should probably upgrade the existing installed systems to 3.19 as well, for uniformity.

Looking at servermon, we seem to have 53 hosts running a 3.16 kernel. Of these:

  • 16 are mc2001-2016 (easy to upgrade, not in prod)
  • 4 are rdb2001-2004 (ditto)
  • 3 are logstash1004-1006
  • 6 are restbase1001-1006
  • 10 are ganeti100x/200x (easy to upgrade, seldomly used, clustered)
  • the rest also seem relatively easy to upgrade

Change 211688 merged by Muehlenhoff:
autoinstall: install linux-meta (3.19) on jessie

https://gerrit.wikimedia.org/r/211688

Patch needs more work, latest installed systems didn't install 3.19

This is down to these hosts:

conf100[1-3]
db205[678] (these are recent, apt.wikimedia.org was apparently unavailable during installation, so the wget call for the late-setup script failed)
rhenium
planet1001

This is down to these hosts now:

conf100[1-3]
rhenium
planet1001

All jessie systems are now running 3.19 (T131928 for moving to 4.4) or 4.4.