Dejan - I found a compromise :-) Attached is a version of that plugin that supports following parameters:
1. hostlist. A string that has a list of controlled nodes separated by space or commas. A required parameter. In a simple form its just a list of nodes. If one needs to use non-standard Xen configuration he can use extended form of this parameter: "node1_name:config1_file node2_name:config2_file". If config file isn't given it defaults to /etc/xen/node_name.cfg 2. Dom0. Name of Dom0 Xen node. A required parameter. 3. ssh_command. SSH command that is used to ssh from DomU to Dom0. Defaults to "/usr/bin/ssh -q -x -n -l root". If one wants to use SSH keys for higher security he needs to use this parameter. So in this form this plugin can be configured as a clone or as a set of resources and location constraints. I'd be very pleased if this plugin gets its way into Linux-HA distribution. On Tue, Feb 26, 2008 at 8:45 AM, Serge Dubrouski <[EMAIL PROTECTED]> wrote: > > On Mon, Feb 25, 2008 at 4:02 PM, Dejan Muhamedagic <[EMAIL PROTECTED]> wrote: > > Hi, > > > > > > On Mon, Feb 25, 2008 at 12:17:40PM -0700, Serge Dubrouski wrote: > > > On Mon, Feb 25, 2008 at 12:10 PM, Dejan Muhamedagic <[EMAIL PROTECTED]> > wrote: > > > > Hi, > > > > > > > > > > > > On Mon, Feb 25, 2008 at 11:27:38AM -0700, Serge Dubrouski wrote: > > > > > I would love to do that and already tried it. Though we didn't > come to > > > > > agreement on how configuration parameters should look like. > > > > > > > > Why? Was there a discussion on the list about it? The > > > > configuration is a bit unusual. Other stonith agents take named > > > > parameters. Though this kind of configuration also works, I'd > > > > prefer something similar to the others, e.g. > > > > > > Yes there was a discussion > > > http://lists.community.tummy.com/pipermail/linux-ha-dev/2007-February/ > > > > It's a long one and peters out inconclusively. > > > > > > > See "new stonith external plugin". The config parameter hostslist is > > > actually derived from original ssh plugin. I needed to have a full > > > list of all controlled nodes and preferred to have it as one > > > parameter. > > > > > > > > > > > hostname dom0 (or xenhost) config > > > > > > > > > > That would work if I needed just a dom0 host, but I also need a list > > > of controlled nodes and probably configuration files. > > > > That's why you can have several instances of a stonith resource > > (see e.g. external/ipmi). Each of them would run with different > > parameters. What I meant was: > > > > hostname: xen vm > > dom0: xen dom0 > > config: vm configuration file > > > > That's possible and easy to do but I'm not sure that it'll be better. > Current version allows to configure a clone. New version would require > configuring a separate resource for each node and creating location > constraints for each of them. Per my opinion that would be more > complex configuration. May be I'm missing something. > -- Serge Dubrouski.
xen0
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