[Linux-HA] Is this the right config?

[Andrew Beekhof]

On 10/1/07, Kelly Byrd <kbyrd-linuxha at memcpy.com> wrote:
>
> > groups can not contain clones or master/slave resources (which are
> > just a special kind of clone)
> >
> > you can however clone a group
> >
>
> But the groups are all exact clones, they have different instance
> attributes that are passed into the resource scripts, I'll explain more
> below.

they can't be exact clones and have different attributes ;-)

>
> >> Basically, I'm looking for how to scale this out easily without a ton of
> >> XML entries for the 22 things I'm managing.
> >
> > it depends what is scaling up... the number of m/s or the number of
> > items that need to run on the master
>
> Let me back up and explain the bigger picture, that will probably help.
> I have two nodes. nodeA, nodeB. Across these two, I want to run 22 "things".
> A "thing" is just a name I'm using to describe a logical grouping, I want
> to avoid overloading the term "group" or "resource". Let's call the
> thing-1 to thing-22.
>
> In heartbeat terms, "thing-N" is really the following in heartbeat terms:
>
> - master/slave drbd resource, each one with a instance attribute like this:
>   <nvpair id="ia-drbd-N-1" name="drbd_resource" value="drbdN"/>
>
> - Filesystem resource, with instance attributes:
>   <nvpair id="ia-fs-N-1" name="fstype" value="ext3"/>
>   <nvpair id="ia-fs-N-2" name="directory" value="/mnt/shareN"/>
>   <nvpair id="ia-fs-N-3" name="device" value="/dev/drbdN"/>
>
> - A "VM" resource. I wrote the OCF resource script. It has one instance
> attribute:
>  <nvpair id="ia-vm-N-1" name="vmxfile" value="/mnt/shareN/vm.vmx"/>
>
> In all these cases, "N" is 1 thru 22, depending on the "thing" it belongs
> to. The VM resource required the Filesystem resource to be running, the
> Filesystem resource requires the drbd resource to be master. Half of these
> "things" will prefer to run on nodeA, half will prefer to run on nodeB,
> but all 22 may run on a single node if the the other node fails.
>
>
> Any help with the simplest possible cib.xml would be appreciated.

i don't really see any way around copy/paste...