Hi Brian, until recently I wasn't quite sure if there might be a difference between this bug and bug 928524. There is not, so I will mark this bug a duplicate of bug 928524, which has an SRU justification.
Thanks. ** Description changed: + ============ SRU justification =========== + Impact: libvirt fails to bring up virbr0 when dnsmasq is installed + Development fix: install a dnsmasq.d file to prevent the system-wide dnsmasq + from binding to virbr0. + Stable fix: same as Development fix + Test case: + virsh net-destroy virbr0 || true + sudo apt-get purge libvirt-bin + sudo apt-get -y install dnsmasq + sudo apt-get -y install libvirt-bin + Regression potential: There should be none, since we are simply telling the + system-wide dnsmasq (if any) not to bind to the virbr0 which our own dnsmasq + instance will bind to. + =================================== + Binary package hint: libvirt-bin 1. Release: Description: Ubuntu 8.04 Release: 8.04 2. Policies: libvirt-bin: - Installed: 0.4.0-2ubuntu8 - Candidate: 0.4.0-2ubuntu8 - Version table: - *** 0.4.0-2ubuntu8 0 - 500 http://us.archive.ubuntu.com hardy/main Packages - 100 /var/lib/dpkg/status + Installed: 0.4.0-2ubuntu8 + Candidate: 0.4.0-2ubuntu8 + Version table: + *** 0.4.0-2ubuntu8 0 + 500 http://us.archive.ubuntu.com hardy/main Packages + 100 /var/lib/dpkg/status dnsmasq: - Installed: 2.41-2ubuntu1 - Candidate: 2.41-2ubuntu1 - Version table: - *** 2.41-2ubuntu1 0 - 500 http://us.archive.ubuntu.com hardy/universe Packages - 100 /var/lib/dpkg/status + Installed: 2.41-2ubuntu1 + Candidate: 2.41-2ubuntu1 + Version table: + *** 2.41-2ubuntu1 0 + 500 http://us.archive.ubuntu.com hardy/universe Packages + 100 /var/lib/dpkg/status 3. Expected behavior: I expected the dnsmasq package not to interfere with the running of libvirt-bin. 4. Actual behavior: What happened is that libvirt-bin became unable to provide DHCP services to guest OSes running in a kvm virtual machine. This is what I see in /var/log/syslog when libvirt-bin is able to start a virtual machine normally: May 16 08:25:57 bodhi avahi-daemon[5446]: Joining mDNS multicast group on interface vnet0.IPv4 with address 192.168.122.1. May 16 08:25:57 bodhi avahi-daemon[5446]: New relevant interface vnet0.IPv4 for mDNS. May 16 08:25:57 bodhi avahi-daemon[5446]: Registering new address record for 192.168.122.1 on vnet0.IPv4. May 16 08:25:57 bodhi dnsmasq[19217]: started, version 2.41 cachesize 150 May 16 08:25:57 bodhi dnsmasq[19217]: compile time options: IPv6 GNU-getopt no-ISC-leasefile DBus I18N TFTP May 16 08:25:57 bodhi dnsmasq[19217]: DHCP, IP range 192.168.122.2 -- 192.168.122.254, lease time 1h May 16 08:25:57 bodhi dnsmasq[19217]: reading /etc/resolv.conf May 16 08:25:57 bodhi dnsmasq[19217]: using nameserver 192.168.2.1#53 May 16 08:25:57 bodhi dnsmasq[19217]: read /etc/hosts - 9 addresses This is what I see when dnsmasq is installed: May 16 08:16:55 bodhi dnsmasq[18482]: failed to bind listening socket for 192.168.122.1: Address already in use May 16 08:16:55 bodhi dnsmasq[18482]: FAILED to start up Observations and workaround: 1. It is possible to restore normal functioning while keeping both packages installed: $ sudo /etc/init.d/dnsmasq stop After this, libvirt-bin will work properly. However this is obviously not a permanent solution. If dnsmasq is not required to be present on the machine, then the package can be removed and libvirt-bin functionality will be restored (until something else breaks it). 2. It seems the problem is that dnsmasq is started by the OS when booting and then libvirt-bin tries to start it again for its own purposes. 3. I do not know what the proper fix is. Is it stupid to want both dnsmasq and libvirt-bin installed at the same time on the same system? Must libvirt-bin be fixed to handle this situation? I don't know. I installed dnsmasq based on a suggestion that dnsmasq was required for libvirt to provide DHCP services to guest OSes but apparently only dnsmasq-base is required for that. So the information I got was erroneous but it does not change the fact that the current packaging specs do not prevent users from shooting themselves in the foot. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/231060 Title: packages dnsmasq and libvirt-bin conflict with each other To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dnsmasq/+bug/231060/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
