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.
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