[Linux-ha-dev] ocf script for mysql

[Alan Robertson]

Joe Bill wrote:
> I'm probably missing something here.
> 
> What guarantees that the host running the GUI through
> which instances are configured is the same host on
> which that instance is going to run on ?
> 
> Or, in other words, how do you get configuration
> defaults of an environment installed on another host
> than the host running the instance configuration GUI,
> other than running some executable on the remote host
> with rsh or ssh ?


Those environment variables are supplied by the LRM not from the system
environment.  You can have separate instances of the same resource
script on the same machine whose environment values (configuration
parameters) are different.

The LRM gives them to your script.
The LRM gets them from the CRM
The CRM gets them from the CIB
The CIB is created by some person typically through an editor
	or the GUI, as possibly modified by various command line tools.
The CIB is kept in sync and identical across all your cluster
	nodes automatically

Does that help?


-- 
    Alan Robertson <alanr at unix.sh>

"Openness is the foundation and preservative of friendship...  Let me
claim from you at all times your undisguised opinions." - William
Wilberforce