[ClusterLabs] Antw: Unexpected Resource movement after failover

[Nikhil Utane]

Ulrich,

I have 4 resources only (not 5, nodes are 5). So then I only need 6
constraints, right?

     [,1]   [,2]   [,3]   [,4]   [,5]  [,6]
[1,] "A"  "A"  "A"    "B"   "B"    "C"
[2,] "B"  "C"  "D"   "C"  "D"    "D"

I understand that if I configure constraint of R1 with R2 score as
-infinity, then the same applies for R2 with R1 score as -infinity (don't
have to configure it explicitly).
I am not having a problem of multiple resources getting schedule on the
same node. Rather, one working resource is unnecessarily getting relocated.

-Thanks
Nikhil


On Thu, Oct 13, 2016 at 7:45 PM, Ulrich Windl <
Ulrich.Windl at rz.uni-regensburg.de> wrote:

> Hi!
>
> Don't you need 10 constraints, excluding every possible pair of your 5
> resources (named A-E here), like in this table (produced with R):
>
>      [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] [,9] [,10]
> [1,] "A"  "A"  "A"  "A"  "B"  "B"  "B"  "C"  "C"  "D"
> [2,] "B"  "C"  "D"  "E"  "C"  "D"  "E"  "D"  "E"  "E"
>
> Ulrich
>
> >>> Nikhil Utane <nikhil.subscribed at gmail.com> schrieb am 13.10.2016 um
> 15:59 in
> Nachricht
> <CAGNWmJW0CWMr3bvR3L9xZCAcJUzyczQbZEzUzpaJxi+Pn7Oj_A at mail.gmail.com>:
> > Hi,
> >
> > I have 5 nodes and 4 resources configured.
> > I have configured constraint such that no two resources can be
> co-located.
> > I brought down a node (which happened to be DC). I was expecting the
> > resource on the failed node would be migrated to the 5th waiting node
> (that
> > is not running any resource).
> > However what happened was the failed node resource was started on another
> > active node (after stopping it's existing resource) and that node's
> > resource was moved to the waiting node.
> >
> > What could I be doing wrong?
> >
> > <nvpair id="cib-bootstrap-options-have-watchdog" value="true"
> > name="have-watchdog"/>
> > <nvpair id="cib-bootstrap-options-dc-version" value="1.1.14-5a6cdd1"
> > name="dc-version"/>
> > <nvpair id="cib-bootstrap-options-cluster-infrastructure"
> value="corosync"
> > name="cluster-infrastructure"/>
> > <nvpair id="cib-bootstrap-options-stonith-enabled" value="false"
> > name="stonith-enabled"/>
> > <nvpair id="cib-bootstrap-options-no-quorum-policy" value="ignore"
> > name="no-quorum-policy"/>
> > <nvpair id="cib-bootstrap-options-default-action-timeout" value="240"
> > name="default-action-timeout"/>
> > <nvpair id="cib-bootstrap-options-symmetric-cluster" value="false"
> > name="symmetric-cluster"/>
> >
> > # pcs constraint
> > Location Constraints:
> >   Resource: cu_2
> >     Enabled on: Redun_CU4_Wb30 (score:0)
> >     Enabled on: Redund_CU2_WB30 (score:0)
> >     Enabled on: Redund_CU3_WB30 (score:0)
> >     Enabled on: Redund_CU5_WB30 (score:0)
> >     Enabled on: Redund_CU1_WB30 (score:0)
> >   Resource: cu_3
> >     Enabled on: Redun_CU4_Wb30 (score:0)
> >     Enabled on: Redund_CU2_WB30 (score:0)
> >     Enabled on: Redund_CU3_WB30 (score:0)
> >     Enabled on: Redund_CU5_WB30 (score:0)
> >     Enabled on: Redund_CU1_WB30 (score:0)
> >   Resource: cu_4
> >     Enabled on: Redun_CU4_Wb30 (score:0)
> >     Enabled on: Redund_CU2_WB30 (score:0)
> >     Enabled on: Redund_CU3_WB30 (score:0)
> >     Enabled on: Redund_CU5_WB30 (score:0)
> >     Enabled on: Redund_CU1_WB30 (score:0)
> >   Resource: cu_5
> >     Enabled on: Redun_CU4_Wb30 (score:0)
> >     Enabled on: Redund_CU2_WB30 (score:0)
> >     Enabled on: Redund_CU3_WB30 (score:0)
> >     Enabled on: Redund_CU5_WB30 (score:0)
> >     Enabled on: Redund_CU1_WB30 (score:0)
> > Ordering Constraints:
> > Colocation Constraints:
> >   cu_3 with cu_2 (score:-INFINITY)
> >   cu_4 with cu_2 (score:-INFINITY)
> >   cu_4 with cu_3 (score:-INFINITY)
> >   cu_5 with cu_2 (score:-INFINITY)
> >   cu_5 with cu_3 (score:-INFINITY)
> >   cu_5 with cu_4 (score:-INFINITY)
> >
> > -Thanks
> > Nikhil
>
>
>
>
>
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