[Pacemaker] reboot of non-vm host results in VM restart -- of chickens and eggs and VMs

[emmanuel segura]

if don't set your vm to start at boot time, you don't to put in cluster
libvirtd, maybe the problem isn't this, but why put the os services in
cluster, for example crond ...... :)


2013/12/19 Bob Haxo <bhaxo at sgi.com>

>  Hello,
>
> Earlier emails related to this topic:
> [pacemaker] chicken-egg-problem with libvirtd and a VM within cluster
> [pacemaker] VirtualDomain problem after reboot of one node
>
>
> My configuration:
>
> RHEL6.5/CMAN/gfs2/Pacemaker/crmsh
>
> pacemaker-libs-1.1.10-14.el6_5.1.x86_64
> pacemaker-cli-1.1.10-14.el6_5.1.x86_64
> pacemaker-1.1.10-14.el6_5.1.x86_64
> pacemaker-cluster-libs-1.1.10-14.el6_5.1.x86_64
>
> Two node HA VM cluster using real shared drive, not drbd.
>
> Resources (relevant to this discussion):
> primitive p_fs_images ocf:heartbeat:Filesystem \
> primitive p_libvirtd lsb:libvirtd \
> primitive virt ocf:heartbeat:VirtualDomain \
>
> services chkconfig on: cman, clvmd, pacemaker
> services chkconfig off: corosync, gfs2, libvirtd
>
> Observation:
>
> Rebooting the NON-host system results in the restart of the VM merrily
> running on the host system.
>
> Apparent cause:
>
> Upon startup, Pacemaker apparently checks the status of configured
> resources. However, the status request for the virt
> (ocf:heartbeat:VirtualDomain) resource fails with:
>
> Dec 18 12:19:30 [4147] mici-admin2       lrmd:  warning: child_timeout_callback:        virt_monitor_0 process (PID 4158) timed out
> Dec 18 12:19:30 [4147] mici-admin2       lrmd:  warning: operation_finished:    virt_monitor_0:4158 - timed out after 200000ms
> Dec 18 12:19:30 [4147] mici-admin2       lrmd:   notice: operation_finished:    virt_monitor_0:4158:stderr [ error: Failed to reconnect to the hypervisor ]
> Dec 18 12:19:30 [4147] mici-admin2       lrmd:   notice: operation_finished:    virt_monitor_0:4158:stderr [ error: no valid connection ]
> Dec 18 12:19:30 [4147] mici-admin2       lrmd:   notice: operation_finished:    virt_monitor_0:4158:stderr [ error: Failed to connect socket to '/var/run/libvirt/libvirt-sock': No such file or directory ]
>
>
> This failure then snowballs into an "orphan" situation in which the
> running VM is restarted.
>
> There was the suggestion of chkconfig on libvirtd (and presumably deleting
> the resource) so that the /var/run/libvirt/libvirt-sock has been created by
> service libvirtd. With libvirtd started by the system, there is no
> un-needed reboot of the VM.
>
> However, it may be that removing libvirtd from Pacemaker control leaves
> the VM vdisk filesystem susceptible to corruption during a reboot induced
> failover.
>
> Question:
>
> Is there an accepted Pacemaker configuration such that the un-needed
> restart of the VM does not occur with the reboot of the non-host system?
>
> Regards,
> Bob Haxo
>
>
>
>
>
>
>
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-- 
esta es mi vida e me la vivo hasta que dios quiera
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