Re: [libvirt] uses of /etc/libvirt/<driver>/

On 03/17/2014 05:46 PM, Jim Fehlig wrote: > I received a report about an odd use case of /etc/libvirt/<driver>/ > config files, and would like to hear some opinions about it. The user > "preps" a host by mounting a remote fs containing VM images and config, > creates links in /etc/libvirt/<driver>/dom.xml to > /mnt-point/whatever/dom.xml, and starts libvirtd. All is well until > there is a need to modify the VM config (e.g. virsh setmaxmem ... > --config), at which point libvirt replaces the link with a file > containing the new config, instead of updating the contents of the > linked file. Not a valid use case. Instead, the user should 'virsh define' (or otherwise use the libvirt APIs). > > I suppose I've always considered the contents of /etc/libvirt/<driver>/ > private to libvirt, with a "modify at your own risk" warning, ignoring > that it is user configuration in /etc. What are the guidelines for > modifying the contents of these directories? Would the above be > considered valid use? Point your user to: http://wiki.libvirt.org/page/FAQ#Where_are_VM_config_files_stored.3F_How_... and hopefully they will quit abusing files under /etc, as that usage is explicitly unsupported. We only support modifications made through libvirt APIs.