[ClusterLabs] make promoted follow promoted resource ?

[lejeczek]

Hi guys.

With these:

-> $ pcs resource status REDIS-6381-clone
   * Clone Set: REDIS-6381-clone [REDIS-6381] (promotable):
     * Promoted: [ ubusrv2 ]
     * Unpromoted: [ ubusrv1 ubusrv3 ]

-> $ pcs resource status PGSQL-PAF-5433-clone
   * Clone Set: PGSQL-PAF-5433-clone [PGSQL-PAF-5433] 
(promotable):
     * Promoted: [ ubusrv1 ]
     * Unpromoted: [ ubusrv2 ubusrv3 ]

-> $ pcs constraint ref REDIS-6381-clone
Resource: REDIS-6381-clone
   colocation-REDIS-6381-clone-PGSQL-PAF-5433-clone-INFINITY

basically promoted Redis should follow promoted pgSQL but 
it's not happening, usually it does.
I presume pcs/cluster does something internally which 
results in disobeying/ignoring that _colocation_ constraint 
for these resources.
I presume scoring might play a role:
   REDIS-6385-clone with PGSQL-PAF-5435-clone (score:1001) 
(rsc-role:Master) (with-rsc-role:Master)
but usually, that scoring works, only "now" it does not.
Any comments I appreciate much.
thanks, L.

I looked at pamaker log - snippet below after 
REDIS-6381-clone re-enabled - but cannot see explanation for 
this.
...
  notice: Calculated transition 110, saving inputs in 
/var/lib/pacemaker/pengine/pe-input-3729.bz2
  notice: Transition 110 (Complete=0, Pending=0, Fired=0, 
Skipped=0, Incomplete=0, 
Source=/var/lib/pacemaker/pengine/pe-input-3729.bz2): Complete
  notice: State transition S_TRANSITION_ENGINE -> S_IDLE
  notice: State transition S_IDLE -> S_POLICY_ENGINE
  notice: Actions: Start      REDIS-6381:0 
(                        ubusrv2 )
  notice: Actions: Start      REDIS-6381:1 
(                        ubusrv3 )
  notice: Actions: Start      REDIS-6381:2 
(                        ubusrv1 )
  notice: Calculated transition 111, saving inputs in 
/var/lib/pacemaker/pengine/pe-input-3730.bz2
  notice: Initiating start operation REDIS-6381_start_0 
locally on ubusrv2
  notice: Requesting local execution of start operation for 
REDIS-6381 on ubusrv2
(to redis) root on none
pam_unix(su:session): session opened for user redis(uid=127) 
by (uid=0)
pam_sss(su:session): Request to sssd failed. Connection refused
pam_unix(su:session): session closed for user redis
pam_sss(su:session): Request to sssd failed. Connection refused
  notice: Setting master-REDIS-6381[ubusrv2]: (unset) -> 1000
  notice: Transition 111 aborted by 
status-2-master-REDIS-6381 doing create 
master-REDIS-6381=1000: Transient attribute change
INFO: demote: Setting master to 'no-such-master'
  notice: Result of start operation for REDIS-6381 on 
ubusrv2: ok
  notice: Transition 111 (Complete=4, Pending=0, Fired=0, 
Skipped=1, Incomplete=14, 
Source=/var/lib/pacemaker/pengine/pe-input-3730.bz2): Stopped
  notice: Actions: Promote    REDIS-6381:0         ( 
Unpromoted -> Promoted ubusrv2 )
  notice: Actions: Start      REDIS-6381:1 
(                        ubusrv1 )
  notice: Actions: Start      REDIS-6381:2 
(                        ubusrv3 )
  notice: Calculated transition 112, saving inputs in 
/var/lib/pacemaker/pengine/pe-input-3731.bz2
  notice: Initiating notify operation 
REDIS-6381_pre_notify_start_0 locally on ubusrv2
  notice: Requesting local execution of notify operation for 
REDIS-6381 on ubusrv2
  notice: Result of notify operation for REDIS-6381 on 
ubusrv2: ok
  notice: Initiating start operation REDIS-6381_start_0 on 
ubusrv1
  notice: Initiating start operation REDIS-6381:2_start_0 on 
ubusrv3
  notice: Initiating notify operation 
REDIS-6381_post_notify_start_0 locally on ubusrv2
  notice: Requesting local execution of notify operation for 
REDIS-6381 on ubusrv2
  notice: Initiating notify operation 
REDIS-6381_post_notify_start_0 on ubusrv1
  notice: Initiating notify operation 
REDIS-6381:2_post_notify_start_0 on ubusrv3
  notice: Result of notify operation for REDIS-6381 on 
ubusrv2: ok
  notice: Initiating notify operation 
REDIS-6381_pre_notify_promote_0 locally on ubusrv2
  notice: Requesting local execution of notify operation for 
REDIS-6381 on ubusrv2
  notice: Initiating notify operation 
REDIS-6381_pre_notify_promote_0 on ubusrv1
  notice: Initiating notify operation 
REDIS-6381:2_pre_notify_promote_0 on ubusrv3
  notice: Result of notify operation for REDIS-6381 on 
ubusrv2: ok
  notice: Initiating promote operation REDIS-6381_promote_0 
locally on ubusrv2
  notice: Requesting local execution of promote operation 
for REDIS-6381 on ubusrv2
  notice: Result of promote operation for REDIS-6381 on 
ubusrv2: ok
  notice: Initiating notify operation 
REDIS-6381_post_notify_promote_0 locally on ubusrv2
  notice: Requesting local execution of notify operation for 
REDIS-6381 on ubusrv2
  notice: Initiating notify operation 
REDIS-6381_post_notify_promote_0 on ubusrv1
  notice: Initiating notify operation 
REDIS-6381:2_post_notify_promote_0 on ubusrv3
  notice: Result of notify operation for REDIS-6381 on 
ubusrv2: ok
  notice: Setting master-REDIS-6381[ubusrv3]: (unset) -> 1
  notice: Transition 112 aborted by 
status-3-master-REDIS-6381 doing create master-REDIS-6381=1: 
Transient attribute change
  notice: Setting master-REDIS-6381[ubusrv1]: (unset) -> 1
  notice: Transition 112 (Complete=25, Pending=0, Fired=0, 
Skipped=5, Incomplete=5, 
Source=/var/lib/pacemaker/pengine/pe-input-3731.bz2): Stopped
  notice: Calculated transition 113, saving inputs in 
/var/lib/pacemaker/pengine/pe-input-3732.bz2
  notice: Initiating monitor operation 
REDIS-6381_monitor_20000 locally on ubusrv2
  notice: Requesting local execution of monitor operation 
for REDIS-6381 on ubusrv2
  notice: Initiating monitor operation 
REDIS-6381_monitor_60000 on ubusrv3
  notice: Initiating monitor operation 
REDIS-6381_monitor_45000 on ubusrv3
  notice: Initiating monitor operation 
REDIS-6381_monitor_60000 on ubusrv1
  notice: Initiating monitor operation 
REDIS-6381_monitor_45000 on ubusrv1
  notice: Result of monitor operation for REDIS-6381 on 
ubusrv2: promoted
  notice: Transition 113 (Complete=5, Pending=0, Fired=0, 
Skipped=0, Incomplete=0, 
Source=/var/lib/pacemaker/pengine/pe-input-3732.bz2): Complete
  notice: State transition S_TRANSITION_ENGINE -> S_IDLE

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