This bug was fixed in the package isc-dhcp - 4.3.3-5ubuntu8
---------------
isc-dhcp (4.3.3-5ubuntu8) xenial; urgency=medium
* debian/apparmor/sbin.dhclient: include the openssl abstraction
(LP: #1543794)
-- Jamie Strandboge <ja...@ubuntu.com> Thu, 25 Feb 2016 08:32:37 -0600
** Changed in: isc-dhcp (Ubuntu)
Status: Confirmed => Fix Released
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https://bugs.launchpad.net/bugs/1543794
Title:
isc-dhcp-server fails to start on second & further attempts with
'Can't open /var/lib/dhcp/dhcpd.leases for append'
Status in isc-dhcp package in Ubuntu:
Fix Released
Bug description:
During the first start of isc-dhcp-server (using the systemd service
unit), a blank dhcpd.leases file is created (presumably owned by
root:root). dhcpd starts successfully (and then exits due to no
subnet definitions, that's expected).
Attempting to start the service again fails with 'Can't open
/var/lib/dhcp/dhcpd.leases for append' (the dhcpd.leases file
ownership is now dhcpd.dhcpd), and apparmor logs a denial of the
dac_override capability.
Removing the leases file repeats this process (first start works as
expected, future ones do not).
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 20:58:12 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)
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