[Linux-ha-dev] ocf script for mysql

[Alan Robertson]

Joe Bill wrote:
> Got that.
> But what I am trying to say is, while that editor or
> GUI or command line tools you mention run on a host of
> the cluster, that host doesn't necessarily have the
> software installed, i.e. mysqld, to run that resource
> being configured.
> 
> Therefor, with mysqld NOT installed on that host they
> are running on, the editor, GUI, command line tools,
> do not have access to those built-in defaults, defined
> at compile-time, provided by the service executable,
> to specify the true resource parameter defaults.
> 
> IMHO, default values shouldn't be "statically"
> specified in the RAs, and they can also not be
> replaced by AT macros at heartbeat package
> installation, for the following reason: these default
> values already exist on those hosts which already have
> the software installed to run a specific service, and
> ultimately, there is no guarantee that all the hosts
> with the same software installed, have the same
> default values defined for running that software.

Some (many?) of the resource agents have those locations settable as
variables.  If all _your_ hosts in your cluster have them set the same
way, then you're in good shape, or can get into good shape with minor
resource agent changes.

But, if you don't have all the hosts in your cluster which you want to
run the same service on installed in the same places, then you're on the
road to madness, and service outages due to human errors.  I'm not
inclined to help enable you to create new ways to have service outages,
or accompany you on your road to the nut house.

-- 
    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