On Mon, Feb 10, 2014 at 01:28:42PM +0100, arnaud gaboury wrote:
The precise answer depends on which version of systemd you have. In any systemd host though, systemd should ensure all the filesystems are mounted correctly. If you have libvirt >= 1.1.1 and systemd >= 205 then you can use its "slice" and "scope" concepts to setup grouping of VMs. If you have older systemd, then you have to setup groups manually. There's some guidance on setting up groups here
http://libvirt.org/cgroups.html
If you have systemd >= 205 then you can ignore cgconfig.conf entirely.
systemd 208-10 and libvirt 1.2.1-1
So you are telling me I spent hours and hours of reading for nothing ? GGGrrhhh.
I use the slice concept (or partition map) with this file :
machine-dahlia.slice
I have been reading and reading again your mentioned link, and I think it is the correct thing to do. But this part puzzles me:
Systemd slice naming
The systemd convention for slice naming is that a slice should include the name of all of its parents prepended on its own name. So for a libvirt partition /machine/engineering/testing, the slice name will be machine-engineering-testing.slice. Again the slice names map directly to the cgroup directory names. Systemd creates three top level slices by default, system.slice user.slice and machine.slice. All virtual machines or containers created by libvirt will be associated with machine.slice by default.
Following above lines, I am thus not sure of the correct name of my .slice systemd file. When trying to avoid any issue, the guest is on the root of my filesystem in /dhalia. directory. This directory is owned by gabx:qemu (not sure it is useful, but when I created it, it came with these owners)
Lets say you want a 2 level hierarchy for the guest from your example above. In the libvirt XML you would set the partition name to: /machine/dahlia this corresponds to a systemd slice call machine-dahlia.slice If you wanted a third level you'd need to create machine-dahlia.slice and also create machine-dahlia-foo.slice, making sure the latter had After=machine-dahlia.slice. Then the libvirt name would be listed as /machine/dahlia/foo Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :|