[et-mgmt-tools] Greatly improved Xen support for koan
Daniel P. Berrange
berrange at redhat.com
Thu Mar 8 23:29:46 UTC 2007
On Thu, Mar 08, 2007 at 06:24:13PM -0500, Michael DeHaan wrote:
> For those using Cobbler for virtualization installs, I've commited a
> change to the Mercurial repository that you will probably be interested
> Basically koan now uses the "virtinst" library to install virtualized
> images rather than using "libvirt" directly. "virtinst" is the same
> library that virt-manager uses to install virtual machines. So, how
> does this affect the running of koan?
> -- The biggest change is that koan now terminates very quickly, with the
> rest of the virtual installation going on in the background. This
> allows multiple parallel virtual installs if someone wants to do it.
> This should make koan much more usable in batch context. If you want
> to watch the installation progress, usage of xm or virt-manager will
> allow that).
> -- Koan also names each virtual system after the mac address they are
> created with, such that they are unique. So no more "xenguest" and
> "xenguest_1" kind of thing, which was error prone when you installed a
> machine and then it crashed, causing naming conflicts. (--xen-name
> will probably be removed from cobbler also, as it's no longer needed).
> If you are using koan with "--system" instead of "--profile", the MAC
> address can be controlled from cobbler, along with other fine tunning
> arguments. If not, it will be randomly generated. If anyone has any
> objections to this naming scheme, you might want to speak up. I can
> think of a couple of alternate ways to name domains automatically --
> "$profilename_$timestamp" isn't so bad.
> -- Koan no longer writes any files to /var/koan -- anywhere, because it
> doesn't have to.
> This is still undergoing some testing, but I would call it very stable
> at this point. I'm just going to be tweaking output and error handling
> a bit, if anything.
> Further down the road, this will enable koan to do hardware virtual
> installs and handle other virtualization types.
> Note that depending on what distro you are running, Xen will save the
> configuration files in one of the following:
Scrub those last two - its /etc/xen or /var/lib/xend/domains
> So, if you have domains that get stopped, looking in those directories
> will tell you which ones you have to start. Also on FC6 and later you
> can experiment with "virsh" for management of inactive domains.
In particular you can do
virsh list --all or virsh list --inactive
And once you know the name,
virsh start <foo>
Or to delete a failed install
virsh undefine <foo>
This is available in FC6 or F7 (basically need libvirt 0.1.10 or
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