Hello,
I have read several postings in the mail archive about the external/ipmi
configuration but there are still some questions that bother me.
The last posting from Thomas: did this cib-configuration worked with
your 2-node cluster?
I have to configure also 2 nodes and would like to use the ipmi-plugin
but I am unsure if I understand what the plugin really does.
This is how I understand the plugin:
To configure the plugin, I will create a resource for every node. This
means, two additional resources in my cib.xml because I have two
cluster-nodes.
The attributes (nvpair) define variables for the ipmi-script, e.g.
hostname...
But what does the constraints tell me? If "#uname" is not equal
to"value" then the score ist -INFINITY, i.e. the resource will never be
started on that node?
In summary, how does the fencing work? The heartbeat-process gets killed
on one node, so all resources of that node are failed over to the other
node. So far so good, but what role plays the new resource in the
failover? Is this resource also failed over to the other node an
therefore executes the ipmi-script with a "reset"-option to its
"origin"-node?
I still do not know how this stonith-plugin works exactly, so I have
some problems configuring heartbeat.
I hope someone can help me with these questions, because I want to
understand how the STONITH works instead of just copy and paste some
code-snippets.
Greetings,
Martin
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