[Linux-HA] Possible bug in Score calculation?

[Andrew Beekhof]

On Dec 6, 2007, at 1:39 PM, Dominik Klein wrote:

> Hi
>
> sorry I have to bother again about score calculation but I came  
> across something I don't understand and that might be a bug.
>
> I have a master-slave drbd resource called ms-drbd (primitive is  
> called drbd2) and a group named testdb (4 primitives, "mount" being  
> the first primitive).
> pingd multiplier is 300 (5 ping nodes)
> default-resource-stickiness is 200
>
> And these are my constraints:
> <constraints>
>        <rsc_order id="drbd2_before_testdb" from="testdb"  
> action="start" to="ms-drbd2" to_action="promote"/>
>        <rsc_colocation id="testdb_on_drbd2" to="ms-drbd2"  
> to_role="master" from="testdb" score="300"/>
> </constraints>
>
> When I look at the scores, I see
>
> drbd2:0 node1 0
> Okay.
>
> drbd2:0 node2 676
> Weird
> This looks like the crm_master value from the drbd OCF RA plus  
> stickiness times (number_of_group_items - 1).

that would make sense.

> How I come to think this has to do with the group? Because if I add  
> another item to the group, the score increases by 1 x stickiness.
>
> Guess this shouldn't be, should it?


it should.

the group needs to go with the master... so it makes sense that you  
should take the groups location preferences into account when deciding  
where to place and promote drbd

>
>
> drbd2:1 node1 76
> crm_master value from drbd OCF RA
>
> drbd2:1 node2 -infinity
> Okay.
>
> mount node1 0
> Okay.
>
> mount node2 1100
> 300 (constraint)
> + 4 x 300 (pingd)
>
> Regards
> Dominik
>
> Here's the cib.xml
>
>   <configuration>
>     <crm_config>
>       <cluster_property_set id="cib-bootstrap-options">
>         <attributes>
>           <nvpair name="no-quorum-policy" value="stop" id="no-quorum- 
> policy"/>
>           <nvpair name="symmetric-cluster" value="true"  
> id="symmetric-cluster"/>
>           <nvpair name="stonith-enabled" value="false" id="stonith- 
> enabled"/>
>           <nvpair name="stonith-action" value="reboot" id="stonith- 
> action"/>
>           <nvpair name="default-resource-stickiness" value="200"  
> id="default-resource-stickiness"/>
>           <nvpair name="default-resource-failure-stickiness"  
> value="-100" id="default-resource-failure-stickiness"/>
>           <nvpair name="is-managed-default" value="true" id="is- 
> managed-default"/>
>           <nvpair name="default-action-timeout" value="20s"  
> id="default-action-timeout"/>
>           <nvpair name="stop-orphan-resources" value="true" id="stop- 
> orphan-resources"/>
>           <nvpair name="stop-orphan-actions" value="true" id="stop- 
> orphan-actions"/>
>           <nvpair name="remove-after-stop" value="false" id="remove- 
> after-stop"/>
>           <nvpair name="pe-error-series-max" value="-1" id="pe-error- 
> series-max"/>
>           <nvpair name="pe-warn-series-max" value="-1" id="pe-warn- 
> series-max"/>
>           <nvpair name="pe-input-series-max" value="-1" id="pe-input- 
> series-max"/>
>           <nvpair name="startup-fencing" value="true" id="startup- 
> fencing"/>
>         </attributes>
>       </cluster_property_set>
>     </crm_config>
> <resources>
>        <master_slave id="ms-drbd2">
>                <meta_attributes id="ma-ms-drbd2">
>                        <attributes>
>                                <nvpair id="ma-ms-drbd2-1"  
> name="clone_max" value="2"/>
>                                <nvpair id="ma-ms-drbd2-2"  
> name="clone_node_max" value="1"/>
>                                <nvpair id="ma-ms-drbd2-3"  
> name="master_max" value="1"/>
>                                <nvpair id="ma-ms-drbd2-4"  
> name="master_node_max" value="1"/>
>                                <nvpair id="ma-ms-drbd2-5"  
> name="notify" value="yes"/>
>                                <nvpair id="ma-ms-drbd2-6"  
> name="globally_unique" value="false"/>
>                                <nvpair id="ma-ms-drbd2-7"  
> name="target_role" value="started"/>
>                        </attributes>
>                </meta_attributes>
>                <primitive id="drbd2" class="ocf"  
> provider="heartbeat" type="drbd">
>                        <instance_attributes id="ia-drbd2">
>                                <attributes>
>                                        <nvpair id="ia-drbd2-1"  
> name="drbd_resource" value="drbd2"/>
>                                </attributes>
>                        </instance_attributes>
>                        <operations>
>                                <op id="op-ms-drbd2-1" name="monitor"  
> interval="5s" timeout="5s" start_delay="30s" role="Master"/>
>                                <op id="op-ms-drbd2-2" name="monitor"  
> interval="6s" timeout="5s" start_delay="30s" role="Slave"/>
>                        </operations>
>                </primitive>
>        </master_slave>
>        <group id="testdb">
>                <meta_attributes id="ma-testdb">
>                        <attributes>
>                                <nvpair id="ma-testdb-1"  
> name="target_role" value="started"/>
>                        </attributes>
>                </meta_attributes>
>                <primitive id="mount" class="ocf" type="filesystem"  
> provider="heartbeat">
>                        ...
>                </primitive>
>                <primitive id="postgres" class="ocf" type="pgsql"  
> provider="heartbeat">
>                        ...
>                </primitive>
>                <primitive id="masterip" class="ocf" type="IPaddr2"  
> provider="heartbeat">
>                        ...
>                </primitive>
>                <primitive id="slon" class="ocf" type="dkcustom"  
> provider="dk">
>                        ...
>                </primitive>
>        </group>
> </resources>
> <constraints>
>        <rsc_order id="drbd2_before_testdb" from="testdb"  
> action="start" to="ms-drbd2" to_action="promote"/>
>        <rsc_colocation id="testdb_on_drbd2" to="ms-drbd2"  
> to_role="master" from="testdb" score="300"/>
> </constraints>
> </configuration>
>
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