[Pacemaker] Node addition policy

Vladislav Bogdanov bubble at hoster-ok.com
Tue Jul 9 02:03:03 EDT 2013


09.07.2013 07:47, Andrew Beekhof wrote:
> 
> On 04/07/2013, at 9:55 PM, Vladislav Bogdanov <bubble at hoster-ok.com> wrote:
> 
>> 04.07.2013 14:50, Andrew Beekhof wrote:
>>>
>>> On 04/07/2013, at 7:24 PM, Vladislav Bogdanov <bubble at hoster-ok.com> wrote:
>>>
>>>> Hi,
>>>>
>>>> I think about safest way to expanding the cluster, and my observations
>>>> show that new nodes are always added in the "online" state
>>>> (standby="off"). I would like nodes to appear in standby="on" state
>>>> unless they can be fenced immediately after addition (fencing is
>>>> configured for them). Other option would be to add them standby
>>>> unconditionally (f.e. admin want to configure some node attributes
>>>> before node runs some resources - like I want for some clusters).
>>>>
>>>> So, I think that it is worth adding new cluster option for that (f.e.
>>>> node-addition-policy [online(default)|standby|fencing] ).
>>>>
>>>> I tried to add node section for not-yet-known node  with crmsh but
>>>> failed (it doesn't like $id for such nodes). After some thinking I
>>>> believe it is better to have some default policy instead of adding node
>>>> sections "in advance", just to minimize the consequences of human errors.
>>>>
>>>> Does that make sense for others?
>>>
>>> Not a word of it :)
>>>
>>> You want nodes that appear in the membership to default to standby=on if no other value is set?
>>
>> That depends on an actual cluster. In short - yes.
> 
> I guess that could be useful.  Can you file a bug for it please?
>

cl#5169





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