[Bug 1420647] Re: Please apply nofile limit fix of ceph-osd to trusty, utopic

[Robie Basak]

** Also affects: ceph (Ubuntu Trusty)
   Importance: Undecided
       Status: New

** Also affects: ceph (Ubuntu Utopic)
   Importance: Undecided
       Status: New

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Title:
  Please apply nofile limit fix of ceph-osd to trusty, utopic

Status in ceph package in Ubuntu:
  Confirmed
Status in ceph source package in Trusty:
  New
Status in ceph source package in Utopic:
  New

Bug description:
  [Impact]
  Without this nofile limit fix, large ceph cluster fails to start or stops handling requests.

  [Fix]
  Ceph upstream applied a new nofile limit(10x) to Giant+ releases (vivid in Ubuntu repo).
  https://github.com/ceph/ceph/pull/2156/files

  [Test case]
  Check that new nofile ulimit is properly applied as 32768 -> 327680:
  $ cat /proc/$(pgrep -n ceph-osd)/limits | grep 'Max open files'

  [Regression Potential]
  minimal,
  If we set 1M nofile ulimit, the daemon will fail to start due to the default fs.nr_open value. However this time, we will apply 0.3M which should not cause troubles.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: ceph 0.80.7-0ubuntu0.14.04.1
  ProcVersionSignature: Ubuntu 3.13.0-44.73-generic 3.13.11-ckt12
  Uname: Linux 3.13.0-44-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  Date: Wed Feb 11 07:14:43 2015
  Ec2AMI: ami-00000016
  Ec2AMIManifest: FIXME
  Ec2AvailabilityZone: nova
  Ec2InstanceType: m1.smallswap
  Ec2Kernel: aki-00000002
  Ec2Ramdisk: ari-00000002
  ExecutablePath: /usr/bin/ceph-osd
  ProcEnviron:
   TERM=linux
   PATH=(custom, no user)
  SourcePackage: ceph
  UpgradeStatus: No upgrade log present (probably fresh install)

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