[Pacemaker] Avoid one node from being a target for resources migration

[Dejan Muhamedagic]

Hi,

On Mon, Jan 12, 2015 at 07:42:10PM +0300, Dmitry Koterov wrote:
> Hello.
> 
> I have 3-node cluster managed by corosync+pacemaker+crm. Node1 and Node2
> are DRBD master-slave, also they have a number of other services installed
> (postgresql, nginx, ...). Node3 is just a corosync node (for quorum), no
> DRBD/postgresql/... are installed at it, only corosync+pacemaker.
> 
> But when I add resources to the cluster, a part of them are somehow moved
> to node3 and since then fail. Note than I have a "colocation" directive to
> place these resources to the DRBD master only and "location" with -inf for
> node3, but this does not help - why? How to make pacemaker not run anything
> at node3?

You could also put the quorum node into standby.

Thanks,

Dejan

> All the resources are added in a single transaction: "cat config.txt | crm
> -w -f- configure" where config.txt contains directives and "commit"
> statement at the end.
> 
> Below are "crm status" (error messages) and "crm configure show" outputs.
> 
> 
> *root at node3:~# crm status*
> Current DC: node2 (1017525950) - partition with quorum
> 3 Nodes configured
> 6 Resources configured
> Online: [ node1 node2 node3 ]
> Master/Slave Set: ms_drbd [drbd]
>      Masters: [ node1 ]
>      Slaves: [ node2 ]
> Resource Group: server
>      fs (ocf::heartbeat:Filesystem): Started node1
>      postgresql (lsb:postgresql): Started node3 FAILED
>      bind9 (lsb:bind9): Started node3 FAILED
>      nginx (lsb:nginx): Started node3 (unmanaged) FAILED
> Failed actions:
>     drbd_monitor_0 (node=node3, call=744, rc=5, status=complete,
> last-rc-change=Mon Jan 12 11:16:43 2015, queued=2ms, exec=0ms): not
> installed
>     postgresql_monitor_0 (node=node3, call=753, rc=1, status=complete,
> last-rc-change=Mon Jan 12 11:16:43 2015, queued=8ms, exec=0ms): unknown
> error
>     bind9_monitor_0 (node=node3, call=757, rc=1, status=complete,
> last-rc-change=Mon Jan 12 11:16:43 2015, queued=11ms, exec=0ms): unknown
> error
>     nginx_stop_0 (node=node3, call=767, rc=5, status=complete,
> last-rc-change=Mon Jan 12 11:16:44 2015, queued=1ms, exec=0ms): not
> installed
> 
> 
> *root at node3:~# crm configure show | cat*
> node $id="1017525950" node2
> node $id="13071578" node3
> node $id="1760315215" node1
> primitive drbd ocf:linbit:drbd \
> params drbd_resource="vlv" \
> op start interval="0" timeout="240" \
> op stop interval="0" timeout="120"
> primitive fs ocf:heartbeat:Filesystem \
> params device="/dev/drbd0" directory="/var/lib/vlv.drbd/root"
> options="noatime,nodiratime" fstype="xfs" \
> op start interval="0" timeout="300" \
> op stop interval="0" timeout="300"
> primitive postgresql lsb:postgresql \
> op monitor interval="10" timeout="60" \
> op start interval="0" timeout="60" \
> op stop interval="0" timeout="60"
> primitive bind9 lsb:bind9 \
> op monitor interval="10" timeout="60" \
> op start interval="0" timeout="60" \
> op stop interval="0" timeout="60"
> primitive nginx lsb:nginx \
> op monitor interval="10" timeout="60" \
> op start interval="0" timeout="60" \
> op stop interval="0" timeout="60"
> group server fs postgresql bind9 nginx
> ms ms_drbd drbd meta master-max="1" master-node-max="1" clone-max="2"
> clone-node-max="1" notify="true"
> location loc_server server rule $id="loc_server-rule" -inf: #uname eq node3
> colocation col_server inf: server ms_drbd:Master
> order ord_server inf: ms_drbd:promote server:start
> property $id="cib-bootstrap-options" \
> stonith-enabled="false" \
> last-lrm-refresh="1421079189" \
> maintenance-mode="false"

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