[Pacemaker] Raid RA Changes to Enable ms configuration -- need some assistance plz.

[Andrew Beekhof]

On 14 Oct 2014, at 12:58 am, Errol Neal <eneal at businessgrade.com> wrote:

> Andrew Beekhof <andrew at ...> writes:
> 
>>> 
>>> Here is my full pacemaker config:
>>> 
>>> http://pastebin.com/jw6WTpZz
>>> 
>>> My understanding is that in order for N to start, N+1 must already 
> be 
>>> running. So my configuration (to me) reads that the ms_md0 master 
>>> resource must be started and running before the ms_scst1 resource 
> will 
>>> be started (as master) and these services will be force on the same 
>>> node. Please correct me if my understanding is incorrect.
>> 
>> I see only one ordering constraint, and thats between dlm_clone and 
> clvm_clone.
>> Colocation != ordering.
> 
> Hi Andrew. I'm still learning, so forgive me. 
> Are you saying I have an ordering issue? 
> I'm not following.

Yes. If you want the cluster to start things in a particular order, then you need to specify it.

> 
> I also have these two lines:

These affect where things go, but not the order in which they are started on the node.

> 
> colocation ms_md0-ms_scst1 inf: ms_scst1:Master ( ms_md0:Master )
> colocation ms_md1-ms_scst2 inf: ms_scst2:Master ( ms_md1:Master )
> 
> 
>> 
>>> When both 
>>> nodes are up and running, the master roles are not split so I 
> *think* my 
>>> configuration is being honored, which leads me to my next issue. 
>>> 
>>> In my modified RA, I'm not sure I understand how to promote/demote 
>>> properly. For example, when I put a node on standby, the remaining 
> node 
>>> doesn't get promoted. I'm not sure why, so I'm asking the experts. 
>>> 
>>> I'd really appreciate any feedback, advice, etc you folks can give. 
> 
> 
> This is the real issue IMO. The promotion is not occurring when it 
> should. 
> 
> 
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