[Pgpool-general] Question about Online Recovery

Tue Apr 7 23:08:33 UTC 2009

Hi DM,

I think pgpool is working now for me. 
I forgot to uncomment the listen address in my postgresql.conf of my new node.
hehe

Thanks,
Harold

--- On Tue, 4/7/09, DM <dm.aeqa at gmail.com> wrote:

> From: DM <dm.aeqa at gmail.com>
> Subject: Re: [Pgpool-general] Question about Online Recovery
> To: rold_50 at yahoo.com
> Cc: pgpool-general at pgfoundry.org
> Date: Tuesday, April 7, 2009, 5:19 PM
> Hi Harold,
> 
> Attached is the steps to recover the database using pgpool
> recovery node.
> (the document is not a standard, i prepared while i was
> testing pgpool
> recovery)
> Email me for any questions on pgpool recovery i will try to
> answer to my
> best of knowledge.
> 
> ------------------------------------------------------
> Question: have a couple of errors.
> LOG: could not receive data from client: connection reset
> by peer
> LOG: unexpected EOF within message length word
> 
> Let me know if pgpool is working fine or not?
> 
> ------------------------------------------------------
> You dont need to define postgres password, but you have to
> create user id
> and password for using the file pcp.conf file under
> "/opt/pgpoolII/etc/"
> 
> snippiet form pcp.conf file..
> # USERID:MD5PASSWD
> pgpuser:09613b137a2e9be2ae93588c5970ab53
> 
> my pcp_recovery_node command looks like this
> usr/pgpool-II/2.2RC2/bin/pcp_recovery_node 20
> <hostname> 9898 pgpuser
> test123 1
> ------------------------------------------------------
> 
> My suggestion is execute your scripts base-backup.sh,
> pgpool-recovery.sh,
> pgpool_remote_start manually and see if it works or not. If
> your scripts
> work manually then pcp_recovery_node command should also
> work.
> Enjoy
> 
> - Deepak Murthy
> 
> 
> On Tue, Apr 7, 2009 at 1:05 PM, Harold Lim
> <rold_50 at yahoo.com> wrote:
> 
> >
> > Hi DM,
> >
> > Can you send me your steps to recovery?
> >
> > Also, when I look at my postgresql log,
> >
> > I have a couple of errors.
> >
> > LOG: could not receive data from client: connection
> reset by peer
> > LOG: unexpected EOF within message length word
> >
> 
> 
> >
> >
> > I also have
> >
> > Password for user postgres:
> > psql: fe_sendauth: no password supplied
> >
> >
> >
> > But I did supply a password when I run
> pcp_recovery_node
> >
> > /opt/pgpoolII/bin/pcp_recovery_node 20 node1 9898
> postgres postgres 1
> >
> >
> > Thanks,
> > Harold
> >
> >
> >
> > --- On Tue, 4/7/09, DM <dm.aeqa at gmail.com>
> wrote:
> >
> > > From: DM <dm.aeqa at gmail.com>
> > > Subject: Re: [Pgpool-general] Question about
> Online Recovery
> > > To: rold_50 at yahoo.com,
> pgpool-general at pgfoundry.org
> > > Date: Tuesday, April 7, 2009, 12:07 PM
> >  > Harold,
> > >
> > > WAL archives can be enabled on one machine or
> many machines
> > > it depends on
> > > how you want.
> > > Assuming you have 2 systems one primary and
> another
> > > standby, in real time
> > > scenario any system can go down. Its better to
> enable WAL
> > > on both system so
> > > that if one fails you could recover from other.
> > >
> > > For your issue with recovery make sure that you
> have added
> > > both of your
> > > system ip address or host name in pgpool_hba.conf
> file and
> > > try executing
> > > your scripts one by one you should be able to
> debug it.
> > >
> > > Also copy the scripts to recover the database on
> both
> > > machines.
> > >
> > > I can send you my steps to recovery if you want.
> Its same
> > > as Gerd's but
> > > little modification.
> > >
> > > - Deepak
> > >
> -----------------------------------------------------------
> > >
> > > > Message: 2
> > > > Date: Mon, 6 Apr 2009 15:32:34 -0700 (PDT)
> > > > From: Harold Lim <rold_50 at yahoo.com>
> > > > Subject: [Pgpool-general] Question about
> Online
> > > Recovery
> > > > To: pgpool-general at pgfoundry.org
> > > > Message-ID:
> > > <5188.66741.qm at web51003.mail.re2.yahoo.com>
> > > > Content-Type: text/plain; charset=us-ascii
> > > >
> > > >
> > > > Hi All,
> > > >
> > > > I'm trying to setup the online recovery.
> I'm
> > > following the
> > > > tutorial/beginners guide written by Gerd.
> > > >
> > > > I am getting an error for 2nd stage. Any
> idea what the
> > > problem might be?
> > > >
> > > >
> > > > Below is the log file:
> > > >
> > > > 2009-04-06 18:28:14 DEBUG: pid 25867:
> pcp_child:
> > > authentication OK
> > > > 2009-04-06 18:28:14 DEBUG: pid 25867:
> pcp_child:
> > > received PCP packet type
> > > > of service 'O'
> > > > 2009-04-06 18:28:14 DEBUG: pid 25867:
> pcp_child: start
> > > online recovery
> > > > 2009-04-06 18:28:14 LOG:   pid 25867:
> starting
> > > recovering node 1
> > > > 2009-04-06 18:28:14 DEBUG: pid 25867:
> exec_checkpoint:
> > > start checkpoint
> > > > 2009-04-06 18:28:14 DEBUG: pid 25867:
> exec_checkpoint:
> > > finish checkpoint
> > > > 2009-04-06 18:28:14 LOG:   pid 25867:
> CHECKPOINT in
> > > the 1st stage done
> > > > 2009-04-06 18:28:14 LOG:   pid 25867:
> starting
> > > recovery command: "SELECT
> > > > pgpool_recovery('copy_base_backup',
> > > '172.16.63.10',
> > > > '/opt/PostgreSQL/8.3/data')"
> > > > 2009-04-06 18:28:14 DEBUG: pid 25867:
> exec_recovery:
> > > start recovery
> > > > 2009-04-06 18:28:22 DEBUG: pid 25834:
> starting health
> > > checking
> > > > 2009-04-06 18:28:22 DEBUG: pid 25834:
> health_check: 0
> > > th DB node status: 1
> > > > 2009-04-06 18:28:22 DEBUG: pid 25834:
> health_check: 1
> > > th DB node status: 3
> > > > 2009-04-06 18:28:33 DEBUG: pid 25867:
> exec_recovery:
> > > finish recovery
> > > > 2009-04-06 18:28:33 LOG:   pid 25867: 1st
> stage is
> > > done
> > > > 2009-04-06 18:28:33 LOG:   pid 25867:
> starting 2nd
> > > stage
> > > > 2009-04-06 18:28:33 LOG:   pid 25867: all
> connections
> > > from clients have
> > > > been closed
> > > > 2009-04-06 18:28:33 DEBUG: pid 25867:
> exec_checkpoint:
> > > start checkpoint
> > > > 2009-04-06 18:28:33 DEBUG: pid 25867:
> exec_checkpoint:
> > > finish checkpoint
> > > > 2009-04-06 18:28:33 LOG:   pid 25867:
> CHECKPOINT in
> > > the 2nd stage done
> > > > 2009-04-06 18:28:33 LOG:   pid 25867:
> starting
> > > recovery command: "SELECT
> > > >
> pgpool_recovery('pgpool_recovery_pitr',
> > > '172.16.63.10',
> > > > '/opt/PostgreSQL/8.3/data')"
> > > > 2009-04-06 18:28:33 DEBUG: pid 25867:
> exec_recovery:
> > > start recovery
> > > > 2009-04-06 18:28:33 ERROR: pid 25867:
> exec_recovery:
> > > pgpool_recovery_pitr
> > > > command failed at 2nd stage
> > > > 2009-04-06 18:28:33 DEBUG: pid 25867:
> exec_recovery:
> > > finish recovery
> > > > 2009-04-06 18:28:33 DEBUG: pid 25867:
> pcp_child:
> > > received PCP packet type
> > > > of service 'X'
> > > > 2009-04-06 18:28:33 DEBUG: pid 25867:
> pcp_child:
> > > client disconnecting.
> > > > close connection
> > > >
> > > > Thanks!
> > > > Harold
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > ------------------------------
> > > >
> > > > Message: 3
> > > > Date: Mon, 6 Apr 2009 16:42:20 -0700 (PDT)
> > > > From: Harold Lim <rold_50 at yahoo.com>
> > > > Subject: [Pgpool-general] Online recovery +
> WAL
> > > archiving
> > > > To: pgpool-general at pgfoundry.org
> > > > Message-ID:
> > >
> <858505.36310.qm at web51010.mail.re2.yahoo.com>
> > > > Content-Type: text/plain; charset=us-ascii
> > > >
> > > >
> > > > Hi,
> > > >
> > > > I'm currently looking at the pgpool-ii
> > > beginner's guide.
> > > > I'm mainly interested in online recovery
> (e.g,
> > > dynamically adding a new
> > > > postgresql node).
> > > >
> > > > Do I have to enable wal archiving for all of
> my node?
> > > or just for my first
> > > > node?
> > > >
> > > >
> > > >
> > > > Thanks!,
> > > > Harold
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > ------------------------------
> > > >
> > > >
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> > > > Pgpool-general at pgfoundry.org
> > > >
> http://pgfoundry.org/mailman/listinfo/pgpool-general
> > > >
> > > >
> > > > End of Pgpool-general Digest, Vol 53, Issue
> 5
> > > >
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