[Pacemaker] Two virtual machines start when they fail in "Live migration".

[Andrew Beekhof]

2011/2/7 Yuusuke IIDA <iidayuus at intellilink.co.jp>:
> Hi,
>
> I am going to manage the virtual machine in environment of Pacemaker-1.0.10.
>
> However, the problem that two virtual machines are started occurs when a
> transition graph of "Live Migration" was canceled on the way.
>
> I show a procedure to generate below a problem.
>
> 1. I was going to let you do "Live Migration" of a virtual machine from host 1
> to host 2.
>
> 2. In the middle of "Live Migration", monitor by pingd broke down with host 2,
> and an attribute changed.
>
> 3. A virtual machine is done start of with host 3 by the management of the cluster.
> Because the virtual machine which moved in migrate_to with host 1 then works, I
> am in a condition that two virtual machines start.
>
> This phenomenon thinks that it is revised in Pacemaker-1.1.

I'm not at all surprised that the 1.1 behavior was better, we put a
lot of work into it recently.

> If this phenomenon is a bug, I want you to revise it in Pacemaker-1.0.

The necessary patch is quite large and invasive, I don't feel its
appropriate to backport into 1.0.