[Pacemaker] Shouldn't colocation -inf: be mandatory?

[Vadym Chepkov]

On Jun 3, 2010, at 9:16 AM, Vadym Chepkov wrote:

> Hi,
> 
> Not sure what I am doing wrong
> 
> primitive dummy1 ocf:pacemaker:Dummy
> primitive dummy2 ocf:pacemaker:Dummy
> primitive dummy3 ocf:pacemaker:Dummy
> 
> only two nodes alive in 3 node cluster, so I can see two dummy resources started on one node:
> 
> dummy2	(ocf::pacemaker:Dummy):	Started c20
> dummy1	(ocf::pacemaker:Dummy):	Started c20
> dummy3	(ocf::pacemaker:Dummy):	Started c22
> 
> Now I want to have only one resource running on one node at any given time, so I created a constraint:
> 
> # crm configure show one-dummy
> colocation one-dummy -inf: ( dummy1 dummy2 dummy3 )
> 
> # cibadmin -Q -o constraints
> <constraints>
>  <rsc_colocation id="one-dummy" score="-INFINITY">
>    <resource_set id="one-dummy-0" sequential="false">
>      <resource_ref id="dummy1"/>
>      <resource_ref id="dummy2"/>
>      <resource_ref id="dummy3"/>
>    </resource_set>
>  </rsc_colocation>
> </constraints>
> 
> I would expect one of the dummies to be down at this point. But it is not.
> Maybe pacemaker can't decide which one, I thought, so I set a priority:
> 
> # crm resource dummy1 meta priority="10"
> 
> Still no dice.
> 
> pacemaker-1.0.8-6.1.el5
> 
> What am I missing?


I am sorry for being impatient, but it's a really critical bug (or lack of knowledge) for me :(
I can't prevent two resources to run on the same host for some reasons. I thought, ok,
I recall "groups" had some issues, so I completely stopped using that syntax

But I do have proper constraints, I believe, and resources are still got started on the same host :(

# crm configure show|grep only   
colocation only-one-sql -inf: _rsc_set_ ( fs_node00_sql fs_node01_sql )

# cibadmin -Q -o constraints
  <rsc_colocation id="only-one-sql" score="-INFINITY">
    <resource_set id="only-one-sql-0" sequential="false">
      <resource_ref id="fs_node00_sql"/>
      <resource_ref id="fs_node01_sql"/>
    </resource_set>
  </rsc_colocation>

# crm_mon -1rf|grep sql
 fs_node00_sql	(ocf::heartbeat:Filesystem):	Started c21
 fs_node01_sql	(ocf::heartbeat:Filesystem):	Started c21
 pgsql_node00	(ocf::heartbeat:pgsql):	Stopped 
 pgsql_node01	(ocf::heartbeat:pgsql):	Started c21
   pgsql_node00: migration-threshold=1000000 fail-count=14 last-failure='Sat Jun  5 14:19:24 2010'

[root at c21 ~]# df -k
Filesystem           1K-blocks      Used Available Use% Mounted on

/dev/mapper/node01-sql
                       2031952     69740   1858996   4% /node01/sql
/dev/mapper/node00-sql
                       2031952     87016   1841720   5% /node00/sql


Please, help

Thank you,
Vadym Chepkov