[Linux-HA] How-to restart a resource quickly or directly

[Andrew Beekhof]

On Wed, Apr 16, 2008 at 3:44 PM, Michael Schwartzkopff
<misch at multinet.de> wrote:
> Am Mittwoch, 16. April 2008 15:37 schrieb Andrew Beekhof:
>
> > On Wed, Apr 16, 2008 at 3:07 PM, Michael Schwartzkopff
>  (...)
>
> > Ok, so right now Dummy only takes one parameter called "state" (no
>  > idea why I called it that).
>  > Add a new one, but make it non-unique.
>  >
>  > <parameter name="somename" unique="0">
>  > <longdesc lang="en">
>  > Random parameter that, when changed, causes a reload instead of a restart
>  > </longdesc>
>  > <shortdesc lang="en">Some parameter</shortdesc>
>  > <content type="string" default="" />
>  > </parameter>
>  >
>  > And make sure the agent advertises the reload operation:
>  >
>  > <action name="reload"       timeout="90" />
>  >
>  > Then when defining the resource, include an nvpair for "somename".  eg
>  >
>  >                       <primitive class="ocf" id="test" provider="heartbeat" type="Dummy">
>  >                               <instance_attributes id="test">
>  >                                       <attributes>
>  >                                               <nvpair id="test_someename" name="someename" value="a"/>
>  >                                       </attributes>
>  >                               </instance_attributes>
>  >                       </primitive>
>  >
>  > Then just change the value of "somename" and the resource will get
>  > reloaded.
>
>  I think I got it. The point is, that the resource is reloaded on every change
>  of any attribute. Isn't it?

Not of any, just of anything with unique=0.

Consider an IP resource.... changing the MTU could be done with a
reload but changing the IP needs a restart.