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[Tyler Hicks <tyhicks@xxxxxxxxxxxxx>]

The commit mentioned in comment #4 has been upstream since kernel v4.5.
Marking the main linux task as fix released.

** Changed in: linux (Ubuntu)
       Status: Incomplete => Fix Released

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https://bugs.launchpad.net/bugs/1736804

Title:
  No tcp_keepalive_time in LXD container

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Incomplete

Bug description:
  Using LXD v2.20 on Ubuntu 16.04 host, with kernel
  Linux 4.4.100-mainline-rev1 #1 SMP Tue Nov 21 08:44:48 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

  I get the following

  # cat /proc/sys/net/ipv4/tcp_keepalive_time
  cat: /proc/sys/net/ipv4/tcp_keepalive_time: No such file or directory

  I'm informed from linuxcontainers.org, that this is a kernel bug.
  https://discuss.linuxcontainers.org/t/why-is-there-no-tcp-keepalive-under-lxd/891

  I happen to be trying to run Kolab.org in a container, and some of their python code errors as this is parameter is not found. Clearly someone has found this in Kolab before as there's a patch
  https://github.com/TBits/KolabScripts/blob/KolabWinterfell/kolab/patches/fixPykolabIMAPKeepAlive.patch
  But the problem is in other places too.

  It could be argued that Kolab should code round this issue.
  But on the other hand, with out it, and in general, other applications would not run in containers, which perhaps is a undesirable limitation.

  Thus it's why I'm reporting here.
  And there may be other parameters not appearing in the container too.

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