[Bug 1543799] Re: isc-dhcp-server & isc-dhcp-server6 systemd service units use the same RuntimeDirectory leading to loss of pid files

[Mathieu Trudel-Lapierre]

After consideration, we're not going to prioritize fixing this for the
EE release (in other words, the Canonical Foundations time isn't going
to be actively working on fixing this). It doesn't mean the bug won't be
fixed, just that there is no company work assigned to the bug.

For now, there's a patch attached, it looks pretty good to me; but I
think it would be best to have that added to Debian first (so it lands
in both Debian and Ubuntu).

Please see https://wiki.ubuntu.com/Debian/Bugs for more info on how you
can submit the patch to Debian (it would be nice if you could do it,
that way you would get credited for it too).

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https://bugs.launchpad.net/bugs/1543799

Title:
  isc-dhcp-server & isc-dhcp-server6 systemd service units use the same
  RuntimeDirectory leading to loss of pid files

Status in isc-dhcp package in Ubuntu:
  Triaged
Status in isc-dhcp source package in Xenial:
  Triaged
Status in isc-dhcp source package in Bionic:
  Triaged
Status in isc-dhcp source package in Cosmic:
  Triaged
Status in isc-dhcp source package in Disco:
  Triaged

Bug description:
  dhcpd reports 'Can't create PID file /run/dhcp-server/dhcpd.pid' (or
  '/run/dhcp-server/dhcpd6.pid' for isc-dhcp-server6), and no file is
  found /run/dhcp-server.

  Additionally, both isc-dhcp-server & isc-dhcp-server6 service unit
  files specify the RuntimeDirectory 'dhcp-server', which is removed
  when either unit stops (and thus would wipe out the other unit's pid
  file, were it being successfully written).

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: isc-dhcp-server 4.3.3-5ubuntu4
  ProcVersionSignature: Ubuntu 4.4.0-2.16-generic 4.4.0
  Uname: Linux 4.4.0-2-generic x86_64
  ApportVersion: 2.19.4-0ubuntu2
  Architecture: amd64
  Date: Tue Feb  9 21:34:08 2016
  InstallationDate: Installed on 2016-02-09 (0 days ago)
  InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160206)
  ProcEnviron:
   LANGUAGE=en_GB:en
   TERM=linux
   PATH=(custom, no user)
   LANG=en_GB.UTF-8
   SHELL=/bin/bash
  SourcePackage: isc-dhcp
  UpgradeStatus: No upgrade log present (probably fresh install)
  modified.conffile..etc.dhcp.dhcpd.conf: [modified]
  mtime.conffile..etc.dhcp.dhcpd.conf: 2016-02-09T21:11:20.104056

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