[Bug 974054] Re: dhcpd attempts to use /var/run/dhcpd.pid, AppArmor errors

[Andy S]

I have the same problem with 12.04 LTS. The issue seems to be that the
dhcpd daemon is pointing to the wrong default. I was able to get it
working by adding the following to the /etc/init/isc-dhcp-server.conf
for the exec line at the bottom. Changing it to:

exec /usr/sbin/dhcpd -f -q -4 -pf /var/run/dhcp-server/dhcpd.pid -cf
$CONFIG_FILE $INTERFACES

It then started ok.

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https://bugs.launchpad.net/bugs/974054

Title:
  dhcpd attempts to use /var/run/dhcpd.pid, AppArmor errors

Status in “isc-dhcp” package in Ubuntu:
  New

Bug description:
  When starting isc-dhcp-server, the following appears in syslog:

  Apr  5 01:20:06 nibbler dhcpd: Can't create PID file /var/run/dhcpd.pid: Permission denied.
  Apr  5 01:20:06 nibbler kernel: [293336.249992] type=1400 audit(1333614006.094:47): apparmor="DENIED" operation="mknod" parent=1 profile="/usr/sbin/dhcpd" name="/run/dhcpd.pid" pid=12427 comm="dhcpd" requested_mask="c" denied_mask="c" fsuid=107 ouid=107

  Even when adding to dhcpd.conf:

  pid-file-name "/var/run/dhcp-server/dhcpd.pid";

  it produces:

  Apr  5 01:33:39 nibbler kernel: [294149.878702] type=1400
  audit(1333614819.902:48): apparmor="DENIED" operation="open" parent=1
  profile="/usr/sbin/dhcpd" name="/run/dhcp-server/dhcpd.pid" pid=13392
  comm="dhcpd" requested_mask="r" denied_mask="r" fsuid=107 ouid=107

  due to not having read access in the AppArmor profile:

    /{,var/}run/dhcp-server/dhcpd{,6}.pid w,

  If this is truly where the pid should be, the compiled-in default
  should be changed, as well as the AppArmor profile tweaked for read
  access.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: isc-dhcp-server 4.1.ESV-R4-0ubuntu3
  ProcVersionSignature: Ubuntu 3.2.0-21.34-generic 3.2.13
  Uname: Linux 3.2.0-21-generic x86_64
  ApportVersion: 2.0-0ubuntu4
  Architecture: amd64
  Date: Thu Apr  5 01:22:25 2012
  InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Beta amd64 (20120229)
  ProcEnviron:
   TERM=screen
   LANG=en_US.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: 2012-04-05T01:19:58.906748

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