On Mon, Jun 8, 2009 at 8:51 AM, Patrick Roßbach
<[email protected]> wrote:
> Hi,
>
> we are migrating from heartbeat v1 to v2 and also want to use pingd
> instead of ipfail. Our two cluster nodes are connected to redundant
> networks (two switches etc.) to communicate to the rest of the world.
> With v1 ipfail compared the number of successful pings of both cluster
> nodes to let the resources run on the node with best network quality. If
> one switch was faulty, both nodes had less, but equal pings and the
> resources were kept just where they are. In v2 pingd is running and
> configured as follows:
>
> ...
> <nvpair id="nvpair-63c37f35-716a-4541-ac79-aca7252d27d7"
> name="default-resource-stickiness" value="INFINITY"/>
> ...
> <rsc_location id="rsc_location_MyRcs" node="node0" rsc="MyRcs"
> score="1"/>
> <rsc_location rsc="MyRcs" id="rsc_location_MyRcs_pingd">
> <rule boolean-op="or" id="rsc_location_MyRcs_pingd-rule"
> score-attribute="-INFINITY">
^^^^ score="INFINITY" or score-attribute=pingd, but not what you have here
> <expression attribute="pingd"
> id="rsc_location_MyRcs_pingd-expression-0" operation="not_defined"/>
> <expression attribute="pingd"
> id="rsc_location_MyRcs_pingd-expression-1" operation="lt" value="2"/>
^^^^ this is the expression thats preventing you operating when both
sides can only see 1 of the ping nodes.
What you need to do is reduce default-resource-stickiness to a large
number < INFINITY (INFINITY ::= 1,000,000)
Then remove the above constraint and create these two:
<rsc_location rsc="MyRcs" id="need-pingd">
<!-- Resources are not permitted on nodes with zero connectivity -->
<rule id="rule-1" score="-INFINITY">
<expression id="exp-1" attribute="pingd" operation="not_defined"/>
<rule>
</rsc_location>
<rsc_location rsc="MyRcs" id="best-pingd">
<!-- Resources prefer nodes with the most connectivity
Just be sure to chose default-resource-stickiness such that
default-resource-stickiness + pingd < INFINITY
-->
<rule id="rule-2" score-attribute="pingd">
<expression id="exp-2" attribute="pingd" operation="defined"/>
<rule>
</rsc_location>
Hope that helps
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