[Linux-HA] 2.1.2 and failover of colocated resources

Andrew Beekhof beekhof at gmail.com
Tue Sep 18 09:16:50 MDT 2007


On 9/18/07, Klemens Kittan <kittan at cs.uni-potsdam.de> wrote:
>
> > shortly I'll be releasing a revised implementation (including
> > documentation!) of colocation which will make it much more intuitive
> > and remove the need for hacks like symmetrical=true
> >
> > if anyone wants to try it sooner rather than later, grab the latest
> > from http://hg.linux-ha.org/dev and ping me for the current version of
> > the docs.
>
> Thank you for the link, we checked out the latest version (2.1.3). Compiling
> and starting worked well.
>
> We did 2 types of starting the heartbeat:
>
> a) without symmetrical="true"

you mean on the colocation constraint right?

> The two systems started as master and slave and the group is started at the
> master node. But still when one service in this group fails, the complete
> group is deactivated and the state of master and slaves leaves unchanged.
> Normally the slave should become master and the group should start on this
> node.

can you attach the complete CIB when the cluster is in this state?

>
> b) with symmetrical="true"
> The behavior of the system keeps unchanged as described below:
>
> > > <rsc_order id="drbd_before_group" from="group" to="ms_drbd"
> > > action="start" to_action="promote"/>
> > > <rsc_colocation id="group_on_drbd" from="group" to="ms_drbd"
> > > to_role="Master" symmetrical="true" score="INFINITY"/>
> > >
> > > In result both systems could be started BUT both became slave!
> > >
> > > cat /proc/drbd:
> > > cs:Connected st:Secondary/Secondary ld:Consistent
> > >
> > > crm_mon:
> > > Master/Slave Set: ms_drbd
> > >     drbd0:0     (heartbeat::ocf:drbd):  Started frigg
> > >     drbd0:1     (heartbeat::ocf:drbd):  Started odin
> > > Resource Group: group
> > >     IPaddr0     (heartbeat::ocf:IPaddr):        Started frigg
> > >     MailTo      (heartbeat::ocf:MailTo):        Started frigg
> > >
> > > Without a master I cannot access to the DRBD ressources.
> > >
> > > Secondly, how the group could be started? The group normally starts at
> > > the master -- and there is none...
>
> Thanks for your help!
> Klemens
>
> --
> Klemens Kittan
> Systemadministrator
>
> Uni-Potsdam, Inst. f. Informatik
> August-Bebel-Str. 89
> 14482 Potsdam
>
> Tel.    :   +49-331-977/3125
> Fax.    :   +49-331-977/3122
> eMail   : kittan at cs.uni-potsdam.de
>
> gpg --recv-keys --keyserver wwwkeys.de.pgp.net 6EA09333
>
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