On Fri, Mar 19, 2010 at 5:16 PM, Lars Ellenberg
<[email protected]> wrote:
> On Fri, Mar 19, 2010 at 03:33:09PM +0100, Maciej Lotkowski wrote:
>> Hi,
>>
>> I'm trying to write OCF script for Redis
>> (http://code.google.com/p/redis/). I need two nodes and master-slave
>> behavior. My cib.xml looks like this:
>>
>> <configuration>
>> <crm_config>
>> <cluster_property_set id="cib-bootstrap-options">
>> <nvpair id="cib-bootstrap-options-dc-version" name="dc-version"
>> value="1.0.4-2ec1d189f9c23093bf9239a980534b661baf782d"/>
> ^^^^^
>
>> <nvpair id="redis-target-role" name="target-role" value="Master"/>
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
>> I set master-max to 1, so there should be only one master node, but
>> after promoting first node Pacemaker keeps trying to promote second
>> node.
>
> Known bug in that version with that target-role.
> upgrade (or delete the target-role setting, and upgrade anyways).
Thanks. I did upgrade and it works like a charm, but I have a new problem.
I have an ip resource which follows master. In case of master failure,
Pacemaker demotes and restarts failed Redis resource and then promotes
a new master. It takes few minutes to start Redis and load a database,
so for this period of time the ip is down, since there is no master.
How can I define a rule, which would instruct Pacemaker to first
promote and move ip resource to the second to node, and then restart
failed "old" master. I was trying to came up with something, but I
couldn't find way to specify rule regarding two different nodes.
<configuration>
<crm_config>
<cluster_property_set id="cib-bootstrap-options">
<nvpair id="cib-bootstrap-options-dc-version"
name="dc-version"
value="1.0.7-6e1815972fc236825bf3658d7f8451d33227d420"/>
<nvpair id="cib-bootstrap-options-cluster-infrastructure"
name="cluster-infrastructure" value="openais"/>
<nvpair id="cib-bootstrap-options-no-quorum-policy"
name="no-quorum-policy" value="ignore"/>
<nvpair id="cib-bootstrap-options-stonith-enabled"
name="stonith-enabled" value="false"/>
<nvpair id="cib-bootstrap-options-expected-quorum-votes"
name="expected-quorum-votes" value="2"/>
</cluster_property_set>
</crm_config>
<nodes>
<node id="noc-test-10" uname="noc-test-10" type="normal"/>
<node id="noc-test-20" uname="noc-test-20" type="normal"/>
</nodes>
<resources>
<master id="redis">
<meta_attributes id="ms-drbd0-meta_attributes">
<nvpair id="ms-drbd0-meta_attributes-clone-max"
name="clone-max" value="2"/>
<nvpair id="ms-drbd0-meta_attributes-notify" name="notify"
value="false"/>
<nvpair id="ms-drbd0-meta_attributes-globally-unique"
name="globally-unique" value="false"/>
<nvpair id="ms-drbd0-meta_attributes-target-role"
name="target-role" value="Master"/>
<nvpair id="redis-unique-5" name="migration-threshold" value="0"/>
</meta_attributes>
<primitive class="ocf" id="redis-master" provider="linbit"
type="redis-master">
<meta_attributes id="redis-meta-1">
<nvpair id="redis-unique-3" name="failure-timeout" value="1s"/>
<nvpair id="redis-unique-4" name="migration-threshold" value="0"/>
</meta_attributes>
<operations>
<op id="drbd0-monitor-59s" interval="10s" name="monitor"
role="Master" timeout="10s" on-fail="block"/>
<op id="drbd0-monitor-60s" interval="9s" name="monitor"
role="Slave" timeout="10s"/>
<op id="drbd0-o-2" name="start" interval="0" timeout="10m"/>
<op id="drbd0-o-3" name="stop" interval="0" timeout="10s"/>
</operations>
</primitive>
</master>
<primitive class="ocf" id="ip-lan-1" provider="heartbeat" type="IPaddr2">
<instance_attributes id="ip-instance_attributes">
<nvpair id="ip-instance_attributes-ip" name="ip" value="10.1.49.138"/>
<nvpair id="ip-instance_attributes-nic" name="nic" value="eth1"/>
<nvpair id="ip-instance_attributes-cidr_netmask"
name="cidr_netmask" value="24"/>
</instance_attributes>
<operations>
<op id="ip-monitor-21s" interval="21s" name="monitor" timeout="5s"/>
</operations>
</primitive>
</resources>
<constraints>
<rsc_order first="redis" first-action="promote"
id="ms-drbd0-before-storage" score="INFINITY" then="ip-lan-1"
then-action="start"/>
<rsc_colocation id="storage-on-ms-drbd0" rsc="ip-lan-1"
score="INFINITY" with-rsc="redis" with-rsc-role="Master"/>
</constraints>
</configuration>
--
Maciej Lotkowski
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