>>>have a look at the code in crm_mon, its not hugely complex.
[RH] It may not be rocket science once you understand what is it you're looking
at. I am still struggling with the concepts and terminology. crm_mon reports
this:
============
Last updated: Fri Dec 7 10:18:29 2007
Current DC: NodeA (2a7021a1-ab44-403d-80a4-5ff9b4e24fcc)
2 Nodes configured.
1 Resources configured.
============
Node: NodeA (2a7021a1-ab44-403d-80a4-5ff9b4e24fcc): standby
Node: NodeB (296a344e-4ca5-4aae-be0b-7fc4473a7e05): online
I still don't know what is "standby" - seems to refer to a node; It also seems
the opposite of "standby" is "online". What does that mean? It also seems my DC
is in "standby". I could really use some help to get a grasp of these concepts
as they confuse me and even simple things like this I don;t know how to
interpret.
> I would also like to be able to force a failover and I am guessing
> there should be some command that would do this, is this true? How
> do I force a failover? Is there a way to figure that the failover is
> complete?
crm_standby or crm_resource -M depending on exactly what you're trying
to achieve.
[RH] well, I would like to have the two nodes of the cluster be one active and
one passive (active and passive in plain English - just in case they happen to
clash with HA terminology I just don't master yet). The active node is the one
I connect to if I use the cluster IP, and runs all the services I am interested
in. Forcing a fail over in my mind means having the active node become passive,
the passive node become active and offering the same services the active node
was offering (say a simple web server). If I ssh to the same cluster IP address
I'd end up on the newly active node. I was under the impression this would be
fairly easy achieved using a simple command, which seems not to be the case.
Essentially I want one node to do everything until I force a failover and then
I want the other node to do everything. No resource distribution, nothing fancy.
Thanks,
RH
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