On Wed, Dec 22, 2010 at 02:57:53PM +0100, Holger Teutsch wrote: > On Wed, 2010-12-22 at 10:37 +0100, Dejan Muhamedagic wrote: > > On Wed, Dec 22, 2010 at 09:57:40AM +0100, Holger Teutsch wrote: > > > On Tue, 2010-12-21 at 19:03 +0100, Dejan Muhamedagic wrote: > > > > Hi, > > > > > > > > On Tue, Dec 21, 2010 at 05:30:52PM +0100, Holger Teutsch wrote: > > > > > Hi, > > > > > I would like to submit a libvirt based stonith plugin for review and > > > > > possible inclusion to glue. > > > > > The plugin uses the client of libvirtd (i.e. virsh) _in the virtual > > > > > machines_ and connects remotely to libvirtd on the hypervisor. > > > > > Therefore is works with whatever transport or hypervisor that libvirt > > > > > supports or will support. > > > > > > > > Just a note that the reset command should try to boot the host in > > > > case it was down too. No objections here to the rest of the code. > > > > > > As a data center guy I would not expect this. In particular when startup > > > fencing comes into play. > > > When I _power down_ a cluster member for good reasons and start only one > > > node I would not like the other one to be powered on automatigically. > > > The power switch is the ultimate thing we control all this stuff > > > > If you want to keep the node down why not use the poweroff action > > for stonith? > > > > Unfortunately libvirt has no state "powered on / not running" or > "persistent power off". > I'm pretty sure that e.g HP's ilo/ipmi implementation of "reset" would > not power on but would be ignored on a powered off machine. So that > might not be an issue with "real" servers.
riloe and ipmi do pay attention to the power state and act correspondingly, that is turn power on if the host was powered off and reset otherwise. > With a previous version of the script on my KVM test cluster startup > fencing of pacemaker powered on a stopped machine and I think that is > not what you want. Well, that's what STONITH requires and that's how all other stonith plugins behave. > > > > Any chance to support more than one host? > > > > > > I reasoned about this as well but as we can not assume 'host name' == > > > 'domain id' that means domain_id has to be a list as well (with defaults > > > or partial defaults). > > > > IIRC, there was one stonith agent which does this kind of > > mapping. Alternatively, perhaps drop domain_id and allow > > appending it in the hostlist (as in external/xen0), i.e. > > "node1[:domain_id] ...". > > > > > I will think again about feasability with not overcomplicated code. > > > > This should reduce the configuration, so I think it's worth the > > effort. > > Will go with your proposal. Great. Cheers, Dejan > - holger > > > > > > > > Cheers, > > > > > > > > Dejan > > > _______________________________________________________ > Linux-HA-Dev: [email protected] > http://lists.linux-ha.org/mailman/listinfo/linux-ha-dev > Home Page: http://linux-ha.org/ _______________________________________________________ Linux-HA-Dev: [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha-dev Home Page: http://linux-ha.org/
