[Pacemaker] [Question] About "quorum-policy=freeze" and "promote".

[renayama19661014 at ybb.ne.jp]

Hi Emmanuel,

> Why are you using ssh as stonith? i don't think the fencing is working because your nodes are in unclean state

No, STONITH is not carried out because all nodes lose quorum.
This is right movement of Pacemaker.

It is an example to use STONITH of ssh.

Best Regards,
Hideo Yamauchi.
--- On Thu, 2014/5/8, emmanuel segura <emi2fast at gmail.com> wrote:

> 
> Why are you using ssh as stonith? i don't think the fencing is working because your nodes are in unclean state
> 
> 
> 
> 
> 2014-05-08 5:37 GMT+02:00  <renayama19661014 at ybb.ne.jp>:
> Hi All,
> 
> I composed Master/Slave resource of three nodes that set quorum-policy="freeze".
> (I use Stateful in Master/Slave resource.)
> 
> ---------------------------------
> Current DC: srv01 (3232238280) - partition with quorum
> Version: 1.1.11-830af67
> 3 Nodes configured
> 9 Resources configured
> 
> 
> Online: [ srv01 srv02 srv03 ]
> 
>  Resource Group: grpStonith1
>      prmStonith1-1      (stonith:external/ssh): Started srv02
>  Resource Group: grpStonith2
>      prmStonith2-1      (stonith:external/ssh): Started srv01
>  Resource Group: grpStonith3
>      prmStonith3-1      (stonith:external/ssh): Started srv01
>  Master/Slave Set: msPostgresql [pgsql]
>      Masters: [ srv01 ]
>      Slaves: [ srv02 srv03 ]
>  Clone Set: clnPingd [prmPingd]
>      Started: [ srv01 srv02 srv03 ]
> ---------------------------------
> 
> 
> Master resource starts in all nodes when I interrupt the internal communication of all nodes.
> 
> ---------------------------------
> Node srv02 (3232238290): UNCLEAN (offline)
> Node srv03 (3232238300): UNCLEAN (offline)
> Online: [ srv01 ]
> 
>  Resource Group: grpStonith1
>      prmStonith1-1      (stonith:external/ssh): Started srv02
>  Resource Group: grpStonith2
>      prmStonith2-1      (stonith:external/ssh): Started srv01
>  Resource Group: grpStonith3
>      prmStonith3-1      (stonith:external/ssh): Started srv01
>  Master/Slave Set: msPostgresql [pgsql]
>      Masters: [ srv01 ]
>      Slaves: [ srv02 srv03 ]
>  Clone Set: clnPingd [prmPingd]
>      Started: [ srv01 srv02 srv03 ]
> (snip)
> Node srv01 (3232238280): UNCLEAN (offline)
> Node srv03 (3232238300): UNCLEAN (offline)
> Online: [ srv02 ]
> 
>  Resource Group: grpStonith1
>      prmStonith1-1      (stonith:external/ssh): Started srv02
>  Resource Group: grpStonith2
>      prmStonith2-1      (stonith:external/ssh): Started srv01
>  Resource Group: grpStonith3
>      prmStonith3-1      (stonith:external/ssh): Started srv01
>  Master/Slave Set: msPostgresql [pgsql]
>      Masters: [ srv01 srv02 ]
>      Slaves: [ srv03 ]
>  Clone Set: clnPingd [prmPingd]
>      Started: [ srv01 srv02 srv03 ]
> (snip)
> Node srv01 (3232238280): UNCLEAN (offline)
> Node srv02 (3232238290): UNCLEAN (offline)
> Online: [ srv03 ]
> 
>  Resource Group: grpStonith1
>      prmStonith1-1      (stonith:external/ssh): Started srv02
>  Resource Group: grpStonith2
>      prmStonith2-1      (stonith:external/ssh): Started srv01
>  Resource Group: grpStonith3
>      prmStonith3-1      (stonith:external/ssh): Started srv01
>  Master/Slave Set: msPostgresql [pgsql]
>      Masters: [ srv01 srv03 ]
>      Slaves: [ srv02 ]
>  Clone Set: clnPingd [prmPingd]
>      Started: [ srv01 srv02 srv03 ]
> ---------------------------------
> 
> I think even if the cluster loses Quorum, being "promote" the Master / Slave resource that's specification of Pacemaker.
> 
> Is it responsibility of the resource agent side to prevent a state of these plural Master?
>  * I think that drbd-RA has those functions.
>  * But, there is no function in Stateful-RA.
>  * As an example, I think that the mechanism such as drbd is necessary by all means when I make a resource of Master/Slave newly.
> 
> Will my understanding be wrong?
> 
> Best Regards,
> Hideo Yamauchi.
> 
> 
> _______________________________________________
> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> 
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://bugs.clusterlabs.org
> 
> 
> 
> -- 
> esta es mi vida e me la vivo hasta que dios quiera