[Pacemaker] pacemaker-remote container as a clone resource

[Andrew Beekhof]

On 1 Sep 2014, at 12:41 pm, Patrick Hemmer <pacemaker at feystorm.net> wrote:

> From: Andrew Beekhof <andrew at beekhof.net>
> Sent: 2014-08-31 19:57:43 EDT
> To: The Pacemaker cluster resource manager <pacemaker at oss.clusterlabs.org>
> Subject: Re: [Pacemaker] pacemaker-remote container as a clone resource
> 
>> On 31 Aug 2014, at 6:09 pm, Patrick Hemmer <pacemaker at feystorm.net>
>>  wrote:
>> 
>> 
>>> I'm interested in creating a resource that will control host containers running pacemaker-remote. The catch is that I want this resource to be a clone, so that if I want more containers, I simply increase the `clone-max` property.
>>> 
>> What kind of container?
> Well I would hope the solution is generic enough to work with any container. But in my specific case, EC2 instances. Plus maybe docker for development work.
> 
>> Most development was done with VirtualMachine which needs a unique name anyway (ie. cant be cloned).
> With EC2 (and docker), you create an instance/container and the name & address is returned after creation.

Thats going to be challenging then.
Since there is no way to know which containers are allowed to be attempting a connection or even which ones match up to the implicit connection managers we have started.

I assume all of these containers are doing the same thing?

> 
>> Interesting concept though, I'm sure we can figure out some way to get it done.
>> 
>> 
>>> The problem is that the `remote-node` meta parameter is set on the clone resource, and not the children. So I can't see a way to tell pacemaker the address of all the clone children containers that get created.
>>> The only way I can see something like this being possible is if the resource agent set an attribute on the clone child when the child was started.
>>> 
>>> Is there any way to accomplish this? Or will I have to create separate resources for every single container? If this isn't possible, would this be considered as a future feature?
>>> 
>>> Thanks
>>> 
>>> -Patrick
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>> 
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> 
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