Description of problem: When editing a network in virsh ('net-edit default', 'net-destroy/start default') to e.g. add a new MAC/IP static address combo, /var/lib/libvirt/dnsmasq/default.hostsfile seems to lag one "version" behind, i.e. carries combos only from the previous edit. To make the current ones effective, changing an unrelated one (e.g. change a hex digit from upper to lowercase) then destroying/restarting the network helps (the unrelated change is only effective on the next change though). I haven't found this issue in RH/Fedora Bugzilla, but googling gave me an open ticket on Launchpad for Ubuntu: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/584910 Version-Release number of selected component (if applicable): libvirt-0.8.8-4.fc15.x86_64 libvirt-client-0.8.8-4.fc15.x86_64 libvirt-python-0.8.8-4.fc15.x86_64 How reproducible: Reproducible Steps to Reproduce: 1. 'net-edit default', then add a new static DHCP mapping to the default network (e.g. <host mac='FF:FF:EE:EE:DD:DD' ip='192.168.122.254' />) 2. 'net-destroy default' 3. 'net-start default' 4. 'grep FF:FF:EE:EE:DD:DD /var/lib/libvirt/dnsmasq/default.hostsfile' Actual results: (nothing) Expected results: FF:FF:EE:EE:DD:DD,192.168.122.254 BTW, I noticed that destroying/starting the network makes it unusable on running guests without rebooting them (they don't ping, restarting the network service in the guest or equivalent doesn't help). Is that expected/intentional or are there ways to add a new static MAC/IP address combo without having to reboot other running guests?
Ping?
Laine, any thoughts?
The problem is that when an active network is re-defined, the new data is stored in network->newDef, but the code that builds the new hosts files uses network->def (the old version of the config). If the network is inactive at the time it's redefined, then the new data is stored directly into network->def, and it takes effect immediately. I just posted a patch upstream to fix the problem: https://www.redhat.com/archives/libvir-list/2011-August/msg00181.html
This package has changed ownership in the Fedora Package Database. Reassigning to the new owner of this component.
We should backport this into F15 the next time we do a build. commit 3aa84653d1c457b1c12efd4b8449e31525042254 Author: Laine Stump <laine> Date: Wed Aug 3 15:33:24 2011 -0400 network: eliminate lag in updating dnsmasq hosts files This addresses https://bugzilla.redhat.com/show_bug.cgi?id=713728 When "defining" a new network (or one that exists but isn't currently active) the new definition is stored in network->def, but for a network that already exists and is active, the new definition is stored in network->newDef, and then moved over to network->def as soon as the network is destroyed.
Given that F15 is EOL in a matter of weeks, I'm closing this WONTFIX. This should already be fixed in F16+, but if someone is still seeing issues, please reopen.