[pgpool-general: 3610] Re: Watchdog start failure
Mephysto
mephystoonhell at gmail.com
Thu Apr 9 16:38:40 JST 2015
Thanks Yugo,
there was some inconsistencies in my network configuration.
Bye.
Meph
On 9 April 2015 at 07:34, Yugo Nagata <nagata at sraoss.co.jp> wrote:
> Hi,
>
> Second pgpool-II tried to become active and bring up VIP,
> but the VIP was brought up by the first pgpool-II, then failed
> to start up.
>
> Can postgres-1 and postgres-2 servers comunicate with each other
> on 9000 port? The second pgpool-II might fail to find the other
> pgpool.
>
> If there is no problem with network comunication, starting the
> second pgpool-II with a few seconds interval might resolve this.
> When the inteval is too short, the first pgpool-II's watchdog
> can not be ready to accept standby pgpool-II.
>
> On Wed, 8 Apr 2015 14:13:45 +0200
> Mephysto <mephystoonhell at gmail.com> wrote:
>
> > Hi there,
> > I'm still testing pgpool 3.4.1 watchdog. I resolved permission issue for
> > ifup and ifdown, but now I am some issues in starting phase of stanby
> > pgpool instance.
> >
> > When I start master pgpool I receive this output:
> >
> > 2015-04-08 12:10:01: pid 10402: LOG: watchdog bringing up delegate IP,
> > 'ifconfig up' succeeded
> > 2015-04-08 12:10:01: pid 10402: DEBUG: watchdog standing for master
> > 2015-04-08 12:10:01: pid 10402: DETAIL: send the packet to declare the
> new
> > master
> > 2015-04-08 12:10:01: pid 10402: LOG: watchdog escalation successful,
> > escalated to master pgpool
> > 2015-04-08 12:10:01: pid 10402: LOG: watchdog started
> > 2015-04-08 12:10:01: pid 10402: LOG: pgpool-II successfully started.
> > version 3.4.1 (tataraboshi)
> >
> > But, when I star secondary instance, I receive this error:
> >
> > 2015-04-08 14:08:21: pid 19376: DEBUG: watchdog executing ping
> > 2015-04-08 14:08:21: pid 19376: DETAIL: succeed to ping 192.168.56.249
> > 2015-04-08 14:08:21: pid 19376: DEBUG: watchdog ping
> > 2015-04-08 14:08:21: pid 19376: DETAIL: ping data: PING 192.168.56.249
> > (192.168.56.249) 56(84) bytes of data.
> >
> > --- 192.168.56.249 ping statistics ---
> > 3 packets transmitted, 3 received, 0% packet loss, time 2003ms
> > rtt min/avg/max/mdev = 0.412/1.106/1.799/0.566 ms
> >
> > 2015-04-08 14:08:21: pid 19376: FATAL: failed to initialize watchdog,
> > delegate_IP "192.168.56.249" already exists
> >
> >
> > This is configuration of master instance:
> >
> >
> #------------------------------------------------------------------------------
> > # WATCHDOG
> >
> #------------------------------------------------------------------------------
> >
> > # - Enabling -
> >
> > use_watchdog = on
> > # Activates watchdog
> > # (change requires restart)
> >
> > # -Connection to up stream servers -
> >
> > trusted_servers = ''
> > # trusted server list which are used
> > # to confirm network connection
> > # (hostA,hostB,hostC,...)
> > # (change requires restart)
> > ping_path = '/bin'
> > # ping command path
> > # (change requires restart)
> >
> > # - Watchdog communication Settings -
> >
> > wd_hostname = 'postgres-1'
> > # Host name or IP address of this
> > watchdog
> > # (change requires restart)
> > wd_port = 9000
> > # port number for watchdog service
> > # (change requires restart)
> > wd_authkey = ''
> > # Authentication key for watchdog
> > communication
> > # (change requires restart)
> >
> > # - Virtual IP control Setting -
> >
> > delegate_IP = '192.168.56.249'
> > # delegate IP address
> > # If this is empty, virtual IP never
> > bring up.
> > # (change requires restart)
> > ifconfig_path = '/opt/postgres/pgpool-II/scripts'
> > # ifconfig command path
> > # (change requires restart)
> > if_up_cmd = 'ifup.sh $_IP_$'
> > # startup delegate IP command
> > # (change requires restart)
> > if_down_cmd = 'ifdown.sh'
> > # shutdown delegate IP command
> > # (change requires restart)
> >
> > arping_path = '/usr/sbin' # arping command path
> > # (change requires restart)
> >
> > arping_cmd = 'sudo arping -U $_IP_$ -w 1'
> > # arping command
> > # (change requires restart)
> >
> > # - Behaivor on escalation Setting -
> >
> > clear_memqcache_on_escalation = on
> > # Clear all the query cache on shared
> > memory
> > # when standby pgpool escalate to
> > active pgpool
> > # (= virtual IP holder).
> > # This should be off if client
> connects
> > to pgpool
> > # not using virtual IP.
> > # (change requires restart)
> > wd_escalation_command = ''
> > # Executes this command at escalation
> > on new active pgpool.
> > # (change requires restart)
> >
> > # - Lifecheck Setting -
> >
> > # -- common --
> >
> > wd_lifecheck_method = 'query'
> > # Method of watchdog lifecheck
> > ('heartbeat' or 'query')
> > # (change requires restart)
> > wd_interval = 10
> > # lifecheck interval (sec) > 0
> > # (change requires restart)
> >
> > # -- heartbeat mode --
> >
> > wd_heartbeat_port = 9694
> > # Port number for receiving heartbeat
> > signal
> > # (change requires restart)
> > wd_heartbeat_keepalive = 2
> > # Interval time of sending heartbeat
> > signal (sec)
> > # (change requires restart)
> > wd_heartbeat_deadtime = 30
> > # Deadtime interval for heartbeat
> > signal (sec)
> > # (change requires restart)
> > heartbeat_destination0 = 'postgres-2'
> > # Host name or IP address of
> > destination 0
> > # for sending heartbeat signal.
> > # (change requires restart)
> > heartbeat_destination_port0 = 9694
> > # Port number of destination 0 for
> > sending
> > # heartbeat signal. Usually this is
> the
> > # same as wd_heartbeat_port.
> > # (change requires restart)
> > heartbeat_device0 = ''
> > # Name of NIC device (such like
> 'eth0')
> > # used for sending/receiving
> heartbeat
> > # signal to/from destination 0.
> > # This works only when this is not
> empty
> > # and pgpool has root privilege.
> > # (change requires restart)
> >
> > #heartbeat_destination1 = 'host0_ip2'
> > #heartbeat_destination_port1 = 9694
> > #heartbeat_device1 = ''
> >
> > # -- query mode --
> >
> > wd_life_point = 3
> > # lifecheck retry times
> > # (change requires restart)
> > wd_lifecheck_query = 'SELECT 1'
> > # lifecheck query to pgpool from
> > watchdog
> > # (change requires restart)
> > wd_lifecheck_dbname = 'template1'
> > # Database name connected for
> lifecheck
> > # (change requires restart)
> > wd_lifecheck_user = 'postgres'
> > # watchdog user monitoring pgpools in
> > lifecheck
> > # (change requires restart)
> > wd_lifecheck_password = ''
> > # Password for watchdog user in
> > lifecheck
> > # (change requires restart)
> >
> > # - Other pgpool Connection Settings -
> >
> > other_pgpool_hostname0 = 'postgres-2'
> > # Host name or IP address to connect
> to
> > for other pgpool 0
> > # (change requires restart)
> > other_pgpool_port0 = 9999
> > # Port number for othet pgpool 0
> > # (change requires restart)
> > other_wd_port0 = 9000
> > # Port number for othet watchdog 0
> > # (change requires restart)
> > #other_pgpool_hostname1 = 'host1'
> > #other_pgpool_port1 = 5432
> > #other_wd_port1 = 9000
> >
> >
> > And this is configuration for secondary instance:
> >
> >
> #------------------------------------------------------------------------------
> > # WATCHDOG
> >
> #------------------------------------------------------------------------------
> >
> > # - Enabling -
> >
> > use_watchdog = on
> > # Activates watchdog
> > # (change requires restart)
> >
> > # -Connection to up stream servers -
> >
> > trusted_servers = ''
> > # trusted server list which are used
> > # to confirm network connection
> > # (hostA,hostB,hostC,...)
> > # (change requires restart)
> > ping_path = '/bin'
> > # ping command path
> > # (change requires restart)
> >
> > # - Watchdog communication Settings -
> >
> > wd_hostname = 'postgres-2'
> > # Host name or IP address of this
> > watchdog
> > # (change requires restart)
> > wd_port = 9000
> > # port number for watchdog service
> > # (change requires restart)
> > wd_authkey = ''
> > # Authentication key for watchdog
> > communication
> > # (change requires restart)
> >
> > # - Virtual IP control Setting -
> >
> > delegate_IP = '192.168.56.249'
> > # delegate IP address
> > # If this is empty, virtual IP never
> > bring up.
> > # (change requires restart)
> > ifconfig_path = '/opt/postgres/pgpool-II/scripts'
> > # ifconfig command path
> > # (change requires restart)
> > if_up_cmd = 'ifup.sh $_IP_$'
> > # startup delegate IP command
> > # (change requires restart)
> > if_down_cmd = 'ifdown.sh'
> > # shutdown delegate IP command
> > # (change requires restart)
> >
> > arping_path = '/usr/sbin' # arping command path
> > # (change requires restart)
> >
> > arping_cmd = 'arping -U $_IP_$ -w 1'
> > # arping command
> > # (change requires restart)
> >
> > # - Behaivor on escalation Setting -
> >
> > clear_memqcache_on_escalation = on
> > # Clear all the query cache on shared
> > memory
> > # when standby pgpool escalate to
> > active pgpool
> > # (= virtual IP holder).
> > # This should be off if client
> connects
> > to pgpool
> > # not using virtual IP.
> > # (change requires restart)
> > wd_escalation_command = ''
> > # Executes this command at escalation
> > on new active pgpool.
> > # (change requires restart)
> >
> > # - Lifecheck Setting -
> >
> > # -- common --
> >
> > wd_lifecheck_method = 'query'
> > # Method of watchdog lifecheck
> > ('heartbeat' or 'query')
> > # (change requires restart)
> > wd_interval = 10
> > # lifecheck interval (sec) > 0
> > # (change requires restart)
> >
> > # -- heartbeat mode --
> >
> > wd_heartbeat_port = 9694
> > # Port number for receiving heartbeat
> > signal
> > # (change requires restart)
> > wd_heartbeat_keepalive = 2
> > # Interval time of sending heartbeat
> > signal (sec)
> > # (change requires restart)
> > wd_heartbeat_deadtime = 30
> > # Deadtime interval for heartbeat
> > signal (sec)
> > # (change requires restart)
> > heartbeat_destination0 = 'postgres-1'
> > # Host name or IP address of
> > destination 0
> > # for sending heartbeat signal.
> > # (change requires restart)
> > heartbeat_destination_port0 = 9694
> > # Port number of destination 0 for
> > sending
> > # heartbeat signal. Usually this is
> the
> > # same as wd_heartbeat_port.
> > # (change requires restart)
> > heartbeat_device0 = ''
> > # Name of NIC device (such like
> 'eth0')
> > # used for sending/receiving
> heartbeat
> > # signal to/from destination 0.
> > # This works only when this is not
> empty
> > # and pgpool has root privilege.
> > # (change requires restart)
> >
> > #heartbeat_destination1 = 'host0_ip2'
> > #heartbeat_destination_port1 = 9694
> > #heartbeat_device1 = ''
> >
> > # -- query mode --
> >
> > wd_life_point = 3
> > # lifecheck retry times
> > # (change requires restart)
> > wd_lifecheck_query = 'SELECT 1'
> > # lifecheck query to pgpool from
> > watchdog
> > # (change requires restart)
> > wd_lifecheck_dbname = 'template1'
> > # Database name connected for
> lifecheck
> > # (change requires restart)
> > wd_lifecheck_user = 'postgres'
> > # watchdog user monitoring pgpools in
> > lifecheck
> > # (change requires restart)
> > wd_lifecheck_password = ''
> > # Password for watchdog user in
> > lifecheck
> > # (change requires restart)
> >
> > # - Other pgpool Connection Settings -
> >
> > other_pgpool_hostname0 = 'postgres-1'
> > # Host name or IP address to connect
> to
> > for other pgpool 0
> > # (change requires restart)
> > other_pgpool_port0 = 9999
> > # Port number for othet pgpool 0
> > # (change requires restart)
> > other_wd_port0 = 9000
> > # Port number for othet watchdog 0
> > # (change requires restart)
> > #other_pgpool_hostname1 = 'host1'
> > #other_pgpool_port1 = 5432
> > #other_wd_port1 = 9000
> >
> >
> >
> >
> > Can you help to resolve my issue?
> >
> > Thanks in advance.
> >
> > Best regards.
> >
> > Meph
>
>
> --
> Yugo Nagata <nagata at sraoss.co.jp>
>
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