Hello List,
I am up to writing a resource agent for Pacemaker which shall be used in a
Master/Slave manner. So the cluster shall always run two instances and one
of them shall be Master. My clone instances need a different configuration
depending on the node that they are running on. I know I could accomplish
this by having some kind of configuration file on each node but I want to
manage as much as possible through the cluster manager. So what I want is a
Master / Slave (or clone) resource running with instance attributes tied to
the cluster node which they are running on.
Let me explain what the purpose is:
The resource is dependent on specific hardware on the cluster node, which
has different hardware addresses on each node. So resource instance A DOES
deliver the same service as resource instance B at least when being in the
master state each but anyways has to be started with a different parameter.
I understood that I can configure a location constraint for a resource so
that it can be run only on one node Lets say my RA expects a param
hwaddr={string}. I can set up a resource for Node a with hwaddr="a" and one
for node b with hwaddr="b" but how can I tell pacemaker that these two
resources now shall be treated as a Master Slave set? Or am I thinking about
this too complicated?
Thank you for any hint in advance,
Felix
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