[ClusterLabs] Complex Pacemaker resource depedency

[Andrei Borzenkov]

11.09.2018 20:57, Ken Gaillot пишет:
> On Mon, 2018-09-10 at 21:46 +0200, Vassilis Aretakis wrote:
>> Hi All,
>>
>> I have a Pacemaker which failovers IPs around 5 nodes. I want to add
>> an 
>> default Route on each node, when this node has at least one of the 
>> resources running.
>>
>>
>> The resources are:
>>
>>   vip1-19    (ocf::heartbeat:IPaddr2):    Started b01.
>>   vip1-20    (ocf::heartbeat:IPaddr2):    Started bm02.
>>   vip1-21    (ocf::heartbeat:IPaddr2):    Started eworker01.
>>   vip1-22    (ocf::heartbeat:IPaddr2):    Started eworker02.
>>   vip1-23    (ocf::heartbeat:IPaddr2):    Started eworker03.
>>   vip1-24    (ocf::heartbeat:IPaddr2):    Started b02.
>>   vip1-25    (ocf::heartbeat:IPaddr2):    Started eworker01.
>>   vip1-26    (ocf::heartbeat:IPaddr2):    Started eworker02.
>>   vip1-27    (ocf::heartbeat:IPaddr2):    Started b01.
>>   vip1-28    (ocf::heartbeat:IPaddr2):    Started eworker03.
>>   vip1-29    (ocf::heartbeat:IPaddr2):    Started eworker01.
>>   vip1-30    (ocf::heartbeat:IPaddr2):    Started eworker02.
>>
>> The Resource which brings up the Route is:
>>
>>   Clone Set: r1-clone [r1]
>>       Started: [ b01. b02. eworker01. eworker02. eworker03. ]
>>
>> If one nodes starts then the r1-clone cannot start, because it has no
>> IP 
>> assigned on that interface and therefore cannot add route.
>> I have to manually cleanup this resource to make it work.
>>
>> What do you suggest to make these resources always come up after at 
>> least one ip is running on the servers?
>>
>>
>> Regards,
>>
>> Vass
> 
> If I understand the question correctly, you want resource sets (in an
> ordering constraint, with require-all=false):
> 
> http://clusterlabs.org/pacemaker/doc/en-US/Pacemaker/1.1/html-single/Pacemaker_Explained/index.html#s-resource-sets
> 

I do not see how resource set can be used here. There is no way to
express "if any of member of resource set is active on specific node,
start specific resource (instance) on this node, but allow different
resources be active on different nodes". Colocation with resource set
requires that all active resources are active on the same node.