[Bug 1372750] Re: A patch for collecting swap utilization in openvz

[Marius Gedminas]

This is the first time I'm proposing an SRU.  I've updated the
description -- what should I do next?  Unassign myself?  Subscribe
ubuntu-sponsors again?

** Description changed:

+ [Impact]
+ 
+ * Any users of collectd that run Ubuntu 14.04 LTS in an OpenVZ container
+ will no longer be able to track swap usage.  This is a regression from
+ Ubuntu 12.04 LTS
+ 
+ [Test Case]
+ 
+ * Get yourself an OpenVC container with some enabled swap space
+ 
+ * sudo apt-get install collectd
+ 
+ * Let it run for a few minutes
+ 
+ * ls /var/lib/collectd/rrd/*/swap/
+ 
+ You should see four files there: swap-free.rrd  swap_io-in.rrd  swap_io-
+ out.rrd  swap-used.rrd
+ 
+ If you see only two (swap_io-in.rrd  swap_io-out.rrd), then you're
+ affected by this bug
+ 
+ [Regression Potential]
+ 
+ * I see no way this could end badly ;)
+ 
+ * I've backported the upstream patch to a package in my PPA (ppa:pov),
+ and have been running it since November 2015.
+ 
+ [Other Info]
+ 
+ * The upstream bug is https://github.com/collectd/collectd/issues/733.
+ It has a fix in master for the upcoming 5.5.0 release at
+ https://github.com/collectd/collectd/commit/8b618e1fb63ca5f8c741e95651bc41cf6e454588,
+ and a smaller fix suitable for backporting for older versions (since
+ 5.3.x) at
+ https://github.com/collectd/collectd/commit/1a146775d42a15202cba4e19c0fcda465705bcb8.
+ 
+ 
+ [Original Bug Report]
+ 
  In collectd-5.4.0-3ubuntu2 there is a bug that prevents collectd from
  collecting information about swap utilization.
  
  Here is a corresponding issue on github:
  https://github.com/collectd/collectd/issues/733
  
  Also the developer provided the minimalistic patch that fixes the issue
  and would be applicable for 5.4.0:
  https://github.com/collectd/collectd/commit/1a146775d42a15202cba4e19c0fcda465705bcb8
  
  PS: forwarded from
  https://answers.launchpad.net/ubuntu/+source/collectd/+question/254877

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https://bugs.launchpad.net/bugs/1372750

Title:
  A patch for collecting swap utilization in openvz

Status in collectd package in Ubuntu:
  Fix Released
Status in collectd source package in Trusty:
  In Progress

Bug description:
  [Impact]

  * Any users of collectd that run Ubuntu 14.04 LTS in an OpenVZ
  container will no longer be able to track swap usage.  This is a
  regression from Ubuntu 12.04 LTS

  [Test Case]

  * Get yourself an OpenVC container with some enabled swap space

  * sudo apt-get install collectd

  * Let it run for a few minutes

  * ls /var/lib/collectd/rrd/*/swap/

  You should see four files there: swap-free.rrd  swap_io-in.rrd
  swap_io-out.rrd  swap-used.rrd

  If you see only two (swap_io-in.rrd  swap_io-out.rrd), then you're
  affected by this bug

  [Regression Potential]

  * I see no way this could end badly ;)

  * I've backported the upstream patch to a package in my PPA (ppa:pov),
  and have been running it since November 2015.

  [Other Info]

  * The upstream bug is https://github.com/collectd/collectd/issues/733.
  It has a fix in master for the upcoming 5.5.0 release at
  https://github.com/collectd/collectd/commit/8b618e1fb63ca5f8c741e95651bc41cf6e454588,
  and a smaller fix suitable for backporting for older versions (since
  5.3.x) at
  https://github.com/collectd/collectd/commit/1a146775d42a15202cba4e19c0fcda465705bcb8.

  
  [Original Bug Report]

  In collectd-5.4.0-3ubuntu2 there is a bug that prevents collectd from
  collecting information about swap utilization.

  Here is a corresponding issue on github:
  https://github.com/collectd/collectd/issues/733

  Also the developer provided the minimalistic patch that fixes the
  issue and would be applicable for 5.4.0:
  https://github.com/collectd/collectd/commit/1a146775d42a15202cba4e19c0fcda465705bcb8

  PS: forwarded from
  https://answers.launchpad.net/ubuntu/+source/collectd/+question/254877

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