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. Any chance to support more than one host? Cheers, Dejan > Thanx > Holger > > > > #!/bin/sh > # > # External STONITH module for a libvirt managed hypervisor (kvm/Xen). > # Uses libvirt as a STONITH device to control guest. > # > # Copyright (c) 2010 Holger Teutsch <[email protected]> > # > # This program is free software; you can redistribute it and/or modify > # it under the terms of version 2 of the GNU General Public License as > # published by the Free Software Foundation. > # > # This program is distributed in the hope that it would be useful, but > # WITHOUT ANY WARRANTY; without even the implied warranty of > # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. > # > # Further, this software is distributed without any warranty that it is > # free of the rightful claim of any third person regarding infringement > # or the like. Any license provided herein, whether implied or > # otherwise, applies only to this software file. Patent licenses, if > # any, provided herein do not apply to combinations of this program with > # other software, or any other product whatsoever. > # > # You should have received a copy of the GNU General Public License > # along with this program; if not, write the Free Software Foundation, Inc., > # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. > # > > # start a domain > libvirt_start() { > out=$($VIRSH -c $hypervisor_uri start $domain_id 2>&1) > if [ $? -eq 0 ] > then > ha_log.sh notice "Domain $domain_id was started" > return 0 > fi > > if echo "$out" | grep -i 'Domain is already active' > /dev/null 2>&1 > then > ha_log.sh notice "Domain $domain_id is already active" > return 0 > fi > > ha_log.sh err "Failed to start domain $domain_id" > ha_log.sh err "$out" > return 1 > } > > # stop a domain > # return > # 0: success > # 1: error > # 2: was already stopped > libvirt_stop() { > out=$($VIRSH -c $hypervisor_uri destroy $domain_id 2>&1) > if [ $? -eq 0 ] > then > ha_log.sh notice "Domain $domain_id was stopped" > return 0 > fi > > if echo "$out" | grep -i 'domain is not running' > /dev/null 2>&1 > then > ha_log.sh notice "Domain $domain_id is already stopped" > return 2 > fi > > ha_log.sh err "Failed to stop domain $domain_id" > ha_log.sh err "$out" > return 1 > } > > # get status of stonith device (*NOT* of the domain). > # If we can retrieve the status of the domain at issue from the hypervisor > # the stonith device is OK. > libvirt_status() { > out=$($VIRSH -c $hypervisor_uri domstate $domain_id 2>&1) > if [ $? -eq 0 ] > then > ha_log.sh notice "$hypervisor_uri/$domain_id: $out" > return 0 > fi > > ha_log.sh err "Failed to get status for $domain_id" > ha_log.sh err "$out" > return 1 > } > > # check config and set variables > # does not return on error > libvirt_check_config() { > VIRSH=`which virsh 2>/dev/null` > > if [ ! -x "$VIRSH" ] > then > ha_log.sh err "virsh not installed" > exit 1 > fi > > if [ -z "$hostname" -o -z "$hypervisor_uri" ] > then > ha_log.sh err "hostname or hypervisor_uri missing; check > configuration" > exit 1 > fi > > # default domain_id to hostname > : ${domain_id:=$hostname} > } > > libvirt_info() { > cat << LVIRTXML > <parameters> > <parameter name="hostname" unique="1" required="1"> > <content type="string" /> > <shortdesc lang="en"> > Hostname > </shortdesc> > <longdesc lang="en"> > Name of the controlled node. > </longdesc> > </parameter> > > <parameter name="domain_id" unique="1"> > <content type="string" /> > <shortdesc lang="en"> > Domain-id if the of the host. > </shortdesc> > <longdesc lang="en"> > Domain-id of the host's virtual machine. Defaults to parameter hostname. > </longdesc> > </parameter> > > <parameter name="hypervisor_uri" required="1"> > <content type="string" /> > <shortdesc lang="en"> > Hypervisor URI > </shortdesc> > <longdesc lang="en"> > URI for connection to the hypervisor. > driver[+transport]://[usern...@][hostname][:port]/[path][?extraparameters] > e.g. > qemu+ssh://my_kvm_server.mydomain.my/system (uses ssh for root) > xen://my_kvm_server.mydomain.my/ (uses TLS for client) > > virsh must be installed (e.g. libvir-client package) and access control must > be configured for your selected URI. > </longdesc> > </parameter> > </parameters> > LVIRTXML > exit 0 > } > > ############# > # Main code # > ############# > > # don't fool yourself when testing with stonith(8) > # and transport ssh > unset SSH_AUTH_SOCK > > case $1 in > gethosts) > echo $hostname > exit 0 > ;; > > on) > libvirt_check_config > libvirt_start > exit $? > ;; > > off) > libvirt_check_config > libvirt_stop > [ $? = 1 ] && exit 1 > exit 0 > ;; > > reset) > # libvirt has no reset so we do power down > # and power on (but only if it was before) > libvirt_check_config > libvirt_stop > rc=$? > [ $rc = 1 ] && exit 1 > [ $rc = 2 ] && exit 0 > > sleep 2 > libvirt_start > exit $? > ;; > > status) > libvirt_check_config > libvirt_status > exit $? > ;; > > getconfignames) > echo "hostname hypervisor_uri" > exit 0 > ;; > > getinfo-devid) > echo "libvirt STONITH device" > exit 0 > ;; > > getinfo-devname) > echo "libvirt STONITH external device" > exit 0 > ;; > > getinfo-devdescr) > echo "libvirt-based Linux host reset for Xen/KVM guest domain through > hypervisor" > exit 0 > ;; > > getinfo-devurl) > echo "ihttp://libvirt.org/uri.html http://linux-ha.org/wiki"; > exit 0 > ;; > > getinfo-xml) > libvirt_info > echo 0; > ;; > > *) > exit 1 > ;; > esac > > > > _______________________________________________________ > 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/
