[Pacemaker] Adding Cluster Nodes in Pacemaker "Configuration Explained"

[Colin]

On Thu, Nov 5, 2009 at 7:32 PM, Andrew Beekhof <andrew at beekhof.net> wrote:
> On Thu, Nov 5, 2009 at 4:25 PM, Colin <colin.hch at gmail.com> wrote:
>> On Wed, Oct 21, 2009 at 2:57 PM, Andrew Beekhof <andrew at beekhof.net> wrote:
>>> On Wed, Oct 21, 2009 at 1:48 PM, Colin <colin.hch at gmail.com> wrote:
>>>> Let's see whether I can summarise correctly:
>>>
>>> basically all correct
>>>
>>>> For Pacemaker + CoroSync/OpenAIS, the Pacemaker attribute
>>>> "expected-quorum-votes" tells the cluster how many votes it needs for
>>>> quorum. (What happens when the option is not set?)
>>>
>>> The cluster sets it for you based on how many nodes it can see.
>>
>> Something strange is going on here:
>>
>> - The cluster updates expected-quorum-votes even when I set it
>> manually; this seems to happen whenever a node joins or leavs the
>> cluster.
>>
>> - A cluster with four expected-quorum-votes, and three of four nodes
>> online, still has quorum; is this a bug??? Or is expected-quorum-votes
>> not the number of nodes required in a partition to have quorum?
>
> no, its the total number of nodes seen by the cluster.
> the cluster wont allow you to set this to a value less than the number
> of nodes it knows about

Great, with that settled I can report that our 1.0.6 w/corosync
cluster survived the first round of testing with no problems!

Regards, Colin