You have been subscribed to a public bug by Robie Basak (racb): 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) ** Affects: isc-dhcp (Ubuntu) Importance: High Status: Confirmed ** Tags: amd64 apport-bug rls-x-incoming xenial -- isc-dhcp-server fails to start on second & further attempts with 'Can't open /var/lib/dhcp/dhcpd.leases for append' https://bugs.launchpad.net/bugs/1543794 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to the bug report. -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs