[Pacemaker] Postgresql Replication
Eloy Coto Pereiro
eloy.coto at gmail.com
Thu Sep 12 13:22:16 UTC 2013
Hi,
Thanks for your help, I use the same example. In this case Kamailio need to
start after postgresql. But this is not a problem I think, the replication
work ok without corosync. I stop all process and start to work with
corosync.
When I start corosync I see this log in my slave:
Sep 12 16:12:50 slave pgsql(pgsql)[26092]: INFO: Master does not exist.
Sep 12 16:12:50 slave pgsql(pgsql)[26092]: WARNING: My data is out-of-date.
status=DISCONNECT
But all data is the same, and If I run the slave server with normal
postgres the replication is ok. Any idea?
Cheers
2013/9/12 Takatoshi MATSUO <matsuo.tak at gmail.com>
> Hi Eloy
>
>
> 2013/9/12 Eloy Coto Pereiro <eloy.coto at gmail.com>:
> > Hi,
> >
> > I have issues with this config, for example when master is running
> corosync
> > service use pg_ctl. But in the slave pg_ctl doesn't start and replication
> > doesn't work.
> >
> > This is my data:
> >
> >
> > Online: [ master slave ]
> > OFFLINE: [ ]
> >
> > Full list of resources:
> >
> > ClusterIP (ocf::heartbeat:IPaddr2): Started master
> > KAMAILIO (lsb:kamailio): Started master
> > Master/Slave Set: msPostgresql [pgsql]
> > Masters: [ master ]
> > Stopped: [ pgsql:1 ]
> >
> > Node Attributes:
> > * Node master:
> > + maintenance : off
> > + master-pgsql : 1000
> > + pgsql-data-status : LATEST
> > + pgsql-master-baseline : 0000000019000080
> > + pgsql-status : PRI
> > * Node slave:
> > + pgsql-data-status : DISCONNECT
> > + pgsql-status : HS:sync
> >
> >
> > In my crm configure show is this:
> > node master \
> > attributes maintenance="off" pgsql-data-status="LATEST"
> > node slave \
> > attributes pgsql-data-status="DISCONNECT"
> > primitive ClusterIP ocf:heartbeat:IPaddr2 \
> > params ip="10.1.1.1" cidr_netmask="24" \
> > op monitor interval="15s" \
> > op start timeout="60s" interval="0s" on-fail="stop" \
> > op monitor timeout="60s" interval="10s" on-fail="restart" \
> > op stop timeout="60s" interval="0s" on-fail="block"
> > primitive KAMAILIO lsb:kamailio \
> > op monitor interval="10s" \
> > op start interval="0" timeout="120s" \
> > op stop interval="0" timeout="120s" \
> > meta target-role="Started"
> > primitive pgsql ocf:heartbeat:pgsql \
> > params pgctl="/usr/pgsql-9.2/bin/pg_ctl" psql="/usr/pgsql-9.2/bin/psql"
> > pgdata="/var/lib/pgsql/9.2/data/" rep_mode="sync" node_list="master
> slave"
> > restore_command="cp /var/lib/pgsql/9.2/pg_archive/%f %p"
> > primary_conninfo_opt="keepalives_idle=60 keepalives_interval=5
> > keepalives_count=5" master_ip="10.1.1.1" restart_on_promote="true" \
> > op start timeout="60s" interval="0s" on-fail="restart" \
> > op monitor timeout="60s" interval="4s" on-fail="restart" \
> > op monitor timeout="60s" interval="3s" on-fail="restart" role="Master" \
> > op promote timeout="60s" interval="0s" on-fail="restart" \
> > op demote timeout="60s" interval="0s" on-fail="stop" \
> > op stop timeout="60s" interval="0s" on-fail="block" \
> > op notify timeout="60s" interval="0s"
> > ms msPostgresql pgsql \
> > meta master-max="1" master-node-max="1" clone-max="2" clone-node-max="1"
> > notify="true" target-role="Started"
> > location cli-prefer-KAMAILIO KAMAILIO \
> > rule $id="cli-prefer-rule-KAMAILIO" inf: #uname eq master
> > location cli-prefer-pgsql msPostgresql \
> > rule $id="cli-prefer-rule-pgsql" inf: #uname eq master
> > location cli-standby-ClusterIP ClusterIP \
> > rule $id="cli-standby-rule-ClusterIP" -inf: #uname eq slave
>
> This location is invalid.
> It means that ClusterIP can't run on slave.
>
> > colocation colocation-1 inf: ClusterIP msPostgresql KAMAILIO
>
> PostgreSQL needs KAMAILIO to start ?
> It means that Pacemaker can't start PostgreSQL on slave.
>
> Sample setting is
> colocation rsc_colocation-1 inf: master-group msPostgresql:Master
>
> At the very beginning, you might want to customize sample settings.
>
> http://clusterlabs.org/wiki/PgSQL_Replicated_Cluster#sample_settings_for_crm_command
>
> And please see logs because pgsql RA outputs some useful logs.
>
> > order order-1 inf: ClusterIP msPostgresql KAMAILIO
> > property $id="cib-bootstrap-options" \
> > dc-version="1.1.8-7.el6-394e906" \
> > cluster-infrastructure="classic openais (with plugin)" \
> > expected-quorum-votes="2" \
> > stonith-enabled="false"
> >
> > Any idea why doesn't start on the second slave?
> >
> > More info:
> >
> > Master:
> >
> > root at master ~]# netstat -putan | grep 5432 | grep LISTEN
> > tcp 0 0 0.0.0.0:5432 0.0.0.0:*
> > LISTEN 3241/postgres
> > tcp 0 0 :::5432 :::*
> > LISTEN 3241/postgres
> > [root at master ~]# ps axu | grep postgres
> > postgres 3241 0.0 0.0 97072 7692 ? S 11:41 0:00
> > /usr/pgsql-9.2/bin/postgres -D /var/lib/pgsql/9.2/data -c
> > config_file=/var/lib/pgsql/9.2/data//postgresql.conf
> > postgres 3293 0.0 0.0 97072 1556 ? Ss 11:41 0:00
> postgres:
> > checkpointer process
> > postgres 3294 0.0 0.0 97072 1600 ? Ss 11:41 0:00
> postgres:
> > writer process
> > postgres 3295 0.0 0.0 97072 1516 ? Ss 11:41 0:00
> postgres:
> > wal writer process
> > postgres 3296 0.0 0.0 97920 2760 ? Ss 11:41 0:00
> postgres:
> > autovacuum launcher process
> > postgres 3297 0.0 0.0 82712 1500 ? Ss 11:41 0:00
> postgres:
> > archiver process failed on 000000010000000000000001
> > postgres 3298 0.0 0.0 82872 1568 ? Ss 11:41 0:00
> postgres:
> > stats collector process
> > root 10901 0.0 0.0 103232 852 pts/0 S+ 11:44 0:00 grep
> > postgres
> >
> >
> > On slave:
> >
> > [root at slave ~]# ps axu | grep postgre
> > root 3332 0.0 0.0 103232 856 pts/0 S+ 11:45 0:00 grep
> > postgre
> > [root at slave ~]# netstat -putan | grep 5432
> > [root at slave ~]#
> >
> >
> > If I make pg_ctl /var/lib/pgsql/9.2/data/ start work ok
> >
> > Any idea?
> >
> >
> > 2013/9/11 Takatoshi MATSUO <matsuo.tak at gmail.com>
> >>
> >> Hi Eloy
> >>
> >> Please see http://clusterlabs.org/wiki/PgSQL_Replicated_Cluster .
> >> In the document, it uses virtual IP to receive connection,
> >> so it doesn't need to change recovery.conf.
> >>
> >> Thanks,
> >> Takatoshi MATSUO
> >>
> >>
> >> 2013/9/11 Eloy Coto Pereiro <eloy.coto at gmail.com>:
> >> > Hi,
> >> >
> >> > In Postgresql if you use wal replication
> >> > <http://wiki.postgresql.org/wiki/Streaming_Replication> when the
> master
> >> > servers fails need to change the recovery.conf on the slave server.
> >> >
> >> > In this case any tool, when the master is down, execute a command and
> >> > get
> >> > this info?
> >> > Is this the right tool for postgresql's replication?
> >> >
> >> > Cheers
>
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