Re: [Libvir] a couple of questions -Newbie
On Mon, Mar 03, 2008 at 03:38:46PM -0700, Spencer Parker wrote:
I actually just saw this and started playing around with it. Should actually do what I need to do for that part. The next thing I need to monitor is disk usage.
Disk usage is tricky to monitor from the hypervisor. Have a look around for my 'virt-df' tool (which doesn't actually work at the moment -- it needs a bit of loving). Here are a couple of starting points: http://www.redhat.com/archives/libvir-list/2007-September/msg00266.html http://hg.et.redhat.com/virt/applications/virt-top--devel?f=ba4432dc8714;fil... In general terms, if you want to monitor things like disk usage, actual memory usage, process lists and so on, you need to have an agent running inside the guest. Collectd might be a good start. Rich. -- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into Xen guests. http://et.redhat.com/~rjones/virt-p2v
On Mon, Mar 03, 2008 at 10:48:01PM +0000, Richard W.M. Jones wrote:
On Mon, Mar 03, 2008 at 03:38:46PM -0700, Spencer Parker wrote:
I actually just saw this and started playing around with it. Should actually do what I need to do for that part. The next thing I need to monitor is disk usage.
Disk usage is tricky to monitor from the hypervisor. Have a look around for my 'virt-df' tool (which doesn't actually work at the moment -- it needs a bit of loving). Here are a couple of starting points:
http://www.redhat.com/archives/libvir-list/2007-September/msg00266.html
http://hg.et.redhat.com/virt/applications/virt-top--devel?f=ba4432dc8714;fil...
I tidied up virt-df a bit, added a manpage and pushed it out to the mercurial repository above. I might release it in a later Fedora for people to try out. At the moment it doesn't really understand LVM, making it a little bit useless, but that's actually not too hard to add -- a worthwhile mini-project for someone wanting to learn OCaml. # virt-df -c qemu:///system Filesystem 1K-blocks Used Available Type f9x32kvm:hda1 190740 24817 165923 Linux ext2/3 f9x32kvm:hda2 LVM2 not supported yet rhel51x32kvm:hda1 99168 14977 84191 Linux ext2/3 rhel51x32kvm:hda2 LVM2 not supported yet # virt-df -c qemu:///system --human-readable Filesystem Size Used Available Type f9x32kvm:hda1 186.3 MiB 24.2 MiB 162.0 MiB Linux ext2/3 f9x32kvm:hda2 LVM2 not supported yet rhel51x32kvm:hda1 96.8 MiB 14.6 MiB 82.2 MiB Linux ext2/3 rhel51x32kvm:hda2 LVM2 not supported yet # virt-df -c qemu:///system --inodes Filesystem Inodes IUse IFree Type f9x32kvm:hda1 50200 36 50164 Linux ext2/3 f9x32kvm:hda2 LVM2 not supported yet rhel51x32kvm:hda1 26104 33 26071 Linux ext2/3 rhel51x32kvm:hda2 LVM2 not supported yet I wonder if we can do 'virt-free' and 'virt-ps' ... Quite ambitious :-) Rich. -- Richard Jones, Emerging Technologies, Red Hat http://et.redhat.com/~rjones virt-p2v converts physical machines to virtual machines. Boot with a live CD or over the network (PXE) and turn machines into Xen guests. http://et.redhat.com/~rjones/virt-p2v
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Richard W.M. Jones