[Pacemaker] Question about behavior of the post-failure during the migrate_to

[Kazunori INOUE]

Hi,

When a node crashed while VM resource was migrating, the VM started
in two nodes. [1]
Is this the designed behavior?

[1]
   Stack: corosync
   Current DC: bl460g1n6 (3232261592) - partition with quorum
   Version: 1.1.11-0.4.ce5d77c.git.el6-ce5d77c
   3 Nodes configured
   8 Resources configured


   Online: [ bl460g1n6 bl460g1n8 ]
   OFFLINE: [ bl460g1n7 ]

   Full list of resources:

   prmDummy        (ocf::pacemaker:Dummy): Started bl460g1n6
   prmVM2  (ocf::heartbeat:VirtualDomain): Started bl460g1n8


   # ssh bl460g1n6 virsh list --all
    Id    Name                           State
   ----------------------------------------------------
    113   vm2                            running

   # ssh bl460g1n8 virsh list --all
    Id    Name                           State
   ----------------------------------------------------
    34    vm2                            running


[Steps to reproduce]
1) Before migrate : vm2 running on bl460g1n7 (DC)

   Stack: corosync
   Current DC: bl460g1n7 (3232261593) - partition with quorum
   Version: 1.1.11-0.4.ce5d77c.git.el6-ce5d77c
   3 Nodes configured
   8 Resources configured


   Online: [ bl460g1n6 bl460g1n7 bl460g1n8 ]

   Full list of resources:

   prmDummy        (ocf::pacemaker:Dummy): Started bl460g1n7
   prmVM2  (ocf::heartbeat:VirtualDomain): Started bl460g1n7

   ...snip...

2) Migrate the VM resource,

   # crm resource move prmVM2

   bl460g1n6 was selected to migration destination.

   Dec 18 14:11:36 bl460g1n7 crmd[6928]:   notice: te_rsc_command:
Initiating action 47: migrate_to prmVM2_migrate_to_0 on bl460g1n7
(local)
   Dec 18 14:11:36 bl460g1n7 lrmd[6925]:     info:
cancel_recurring_action: Cancelling operation prmVM2_monitor_10000
   Dec 18 14:11:36 bl460g1n7 crmd[6928]:     info: do_lrm_rsc_op:
Performing key=47:5:0:ddf348fe-fbad-4abb-9a12-8250f71b075a
op=prmVM2_migrate_to_0
   Dec 18 14:11:36 bl460g1n7 lrmd[6925]:     info: log_execute:
executing - rsc:prmVM2 action:migrate_to call_id:33
   Dec 18 14:11:36 bl460g1n7 crmd[6928]:     info: process_lrm_event:
LRM operation prmVM2_monitor_10000 (call=31, status=1, cib-update=0,
confirmed=true) Cancelled
   Dec 18 14:11:36 bl460g1n7 VirtualDomain(prmVM2)[7387]: INFO: vm2:
Starting live migration to bl460g1n6 (using remote hypervisor URI
qemu+ssh://bl460g1n6/system ).

3) And then, before migrate_to is completed after "virsh migrate"
   in VirtualDomain was completed, I made bl460g1n7 crash.

   As a result, vm2 was running in bl460g1n6 already, but it was
   even started in bl460g1n8 by pacemaker. [1]

   Dec 18 14:11:49 bl460g1n8 crmd[25981]:   notice: process_lrm_event:
LRM operation prmVM2_start_0 (call=31, rc=0, cib-update=28,
confirmed=true) ok


Best Regards,
Kazunori INOUE
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