[pgpool-general: 8700] Re: replication state not visible
Todd Stein
todd.stein at microfocus.com
Thu Mar 30 22:50:50 JST 2023
I figured out the root cause of my problems.
I was trying to use encrypted passwords in the .pgpass and pcppass files. Once I changed them to use plain-text passwords, other processes like "create replication slot" started working.
Also changing auto_failback = on to auto_failback = off, resolved an issue occurring when running a pcp_promote_node command.
Regards,
Todd Stein
-----Original Message-----
From: Bo Peng <pengbo at sraoss.co.jp>
Sent: Wednesday, March 29, 2023 10:05 PM
To: Todd Stein <todd.stein at microfocus.com>
Cc: pgpool-general at pgpool.net
Subject: Re: [pgpool-general: 8671] replication state not visible
Hello,
> [postgres at catvmtspg02a DBToolkit]$ psql -h 16.78.121.42 -U pgpool postgres -p 9999 -c "SELECT * FROM pg_stat_replication"
> Password for user pgpool:
> pid | usesysid | usename | application_name | client_addr | client_hostname | client_port | backend_start | backend_xmin | state | sent_lsn | write_lsn | flush_lsn | replay_lsn | write_lag | flush_lag | re
> play_lag | sync_priority | sync_state | reply_time
> --------+----------+---------+------------------------------+--------------+-----------------+-------------+-------------------------------+--------------+-----------+------------+------------+------------+------------+-----------+-----------+---
> ---------+---------------+------------+-------------------------------
> 381423 | 16385 | repl | catvmtspg02b.sac.swinfra.net | 16.78.121.44 | | 38634 | 2023-03-28 16:45:34.183458-04 | | streaming | 2/FD0001C0 | 2/FD0001C0 | 2/FD0001C0 | 2/FD0001C0 | | |
> | 0 | async | 2023-03-29 07:50:03.762755-04
> 381531 | 16385 | repl | catvmtspg02c.sac.swinfra.net | 16.78.121.45 | | 58088 | 2023-03-28 16:45:44.223045-04 | | streaming | 2/FD0001C0 | 2/FD0001C0 | 2/FD0001C0 | 2/FD0001C0 | | |
> | 0 | async | 2023-03-29 07:50:03.928561-04
> (2 rows)
The application name is:
catvmtspg02b.sac.swinfra.net
catvmtspg02c.sac.swinfra.net
Your configurations in pgpool.conf are:
backend_application_name1 = 'catvmtspg02b.domain.net'
backend_application_name2 = 'catvmtspg02c.domain.net'
You need to specify backend_application_name that matches the applicatoin names.
On Wed, 29 Mar 2023 11:51:22 +0000
Todd Stein <todd.stein at microfocus.com> wrote:
> Hi Bo,
> Thank you for your response. I really need to solve this one !!!
>
> [postgres at catvmtspg02a DBToolkit]$ psql -h 16.78.121.42 -U pgpool -p 9999 -c "SELECT * FROM pg_stat_replication"
> Password for user pgpool:
> psql: error: connection to server at "16.78.121.42", port 9999 failed:
> FATAL: unable to get session context [postgres at catvmtspg02a
> DBToolkit]$
>
> Here are a few more related queries:
>
> [postgres at catvmtspg02a DBToolkit]$ psql -h 16.78.121.1 -U pgpool -p 9999 -c "show pool_nodes"
> Password for user pgpool:
> psql: error: connection to server at "16.78.121.1", port 9999 failed:
> FATAL: unable to get session context [postgres at catvmtspg02a DBToolkit]$ psql -h 16.78.121.1 -U pgpool postgres -p 9999 -c "show pool_nodes"
> Password for user pgpool:
> node_id | hostname | port | status | pg_status | lb_weight | role | pg_role | select_cnt | load_balance_node | replication_delay | replication_state | replication_sync_state | last_status_change
> ---------+------------------------------+------+--------+-----------+-----------+---------+---------+------------+-------------------+-------------------+-------------------+------------------------+---------------------
> 0 | catvmtspg02a.sac.swinfra.net | 5432 | up | up | 0.333333 | primary | primary | 2 | true | 0 | | | 2023-03-28 16:40:00
> 1 | catvmtspg02b.sac.swinfra.net | 5432 | up | up | 0.333333 | standby | standby | 0 | false | 0 | | | 2023-03-28 16:40:00
> 2 | catvmtspg02c.sac.swinfra.net | 5432 | up | up | 0.333333 | standby | standby | 0 | false | 0 | | | 2023-03-28 16:40:00
> (3 rows)
>
> [postgres at catvmtspg02a DBToolkit]$ psql -h 16.78.121.42 -U pgpool postgres -p 9999 -c "SELECT * FROM pg_stat_replication"
> Password for user pgpool:
> pid | usesysid | usename | application_name | client_addr | client_hostname | client_port | backend_start | backend_xmin | state | sent_lsn | write_lsn | flush_lsn | replay_lsn | write_lag | flush_lag | re
> play_lag | sync_priority | sync_state | reply_time
> --------+----------+---------+------------------------------+--------------+-----------------+-------------+-------------------------------+--------------+-----------+------------+------------+------------+------------+-----------+-----------+---
> ---------+---------------+------------+-------------------------------
> 381423 | 16385 | repl | catvmtspg02b.sac.swinfra.net | 16.78.121.44 | | 38634 | 2023-03-28 16:45:34.183458-04 | | streaming | 2/FD0001C0 | 2/FD0001C0 | 2/FD0001C0 | 2/FD0001C0 | | |
> | 0 | async | 2023-03-29 07:50:03.762755-04
> 381531 | 16385 | repl | catvmtspg02c.sac.swinfra.net | 16.78.121.45 | | 58088 | 2023-03-28 16:45:44.223045-04 | | streaming | 2/FD0001C0 | 2/FD0001C0 | 2/FD0001C0 | 2/FD0001C0 | | |
> | 0 | async | 2023-03-29 07:50:03.928561-04
> (2 rows)
>
>
>
> Regards,
>
> Todd Stein
>
> -----Original Message-----
> From: Bo Peng <pengbo at sraoss.co.jp>
> Sent: Wednesday, March 29, 2023 1:24 AM
> To: Todd Stein <todd.stein at microfocus.com>
> Cc: pgpool-general at pgpool.net
> Subject: Re: [pgpool-general: 8671] replication state not visible
>
> Hello,
>
> Pgpool executes "SELECT * FROM pg_stat_replication" to retrieve replication_state and replication_sync_state.
>
> Could you try to connect to PostgreSQL primary using pgpool user and run "SELECT * FROM pg_stat_replication"
> on the server where pgpool is running?
>
> psql -h <PostgreSQL primary> -U pgpool -p <PostgreSQL port> -c "SELECT * FROM pg_stat_replication"
>
>
> On Mon, 27 Mar 2023 12:37:06 +0000
> Todd Stein <todd.stein at microfocus.com> wrote:
>
> > Thank you.
> > Attached is a zip file labeled as a txt file containing config files and logs.
> > sr_check_user is specified as pgpool. The pgpool user is in pg_monitor group.
> >
> >
> >
> > Regards,
> >
> > Todd Stein
> >
> > -----Original Message-----
> > From: Bo Peng <pengbo at sraoss.co.jp>
> > Sent: Monday, March 27, 2023 8:28 AM
> > To: Todd Stein <todd.stein at microfocus.com>
> > Cc: pgpool-general at pgpool.net
> > Subject: Re: [pgpool-general: 8671] replication state not visible
> >
> > Hello,
> >
> > You also need to make sure the user specified in sr_check_user is PostgreSQL super user or or in pg_monitor group.
> >
> > Grant pg_monitor to user:
> >
> > GRANT pg_monitor TO <username>;
> >
> >
> > On Mon, 27 Mar 2023 11:29:50 +0000
> > Todd Stein <todd.stein at microfocus.com> wrote:
> >
> > > it is configured. I sent config files and logs on a different
> > > thread ________________________________
> > > From: Bo Peng <pengbo at sraoss.co.jp>
> > > Sent: Monday, March 27, 2023 1:57:05 AM
> > > To: Todd Stein <todd.stein at microfocus.com>
> > > Cc: pgpool-general at pgpool.net <pgpool-general at pgpool.net>
> > > Subject: Re: [pgpool-general: 8671] replication state not visible
> > >
> > > Hello,
> > >
> > > On Fri, 24 Mar 2023 15:38:03 +0000 Todd Stein
> > > <todd.stein at microfocus.com> wrote:
> > >
> > > > While I do have the application field populated, I am not seeing the replication state in the show pool_nodes table.
> > >
> > > You need to configure "backend_application_name" parameter.
> > >
> > > Please see the following doc:
> > > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww%2F&data=05%7C01%7Ctodd.stein%40microfocus.com%7Cd3e018bb390d4ff32a1408db30c31e79%7C856b813c16e549a585ec6f081e13b527%7C0%7C0%7C638157386819489588%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=IG0XqEqTkMkM%2FvaQng0fPbNubZ%2BssRtQUAerSmQFy%2Fw%3D&reserved=0.
> > > pgpool.net%2Fdocs%2Flatest%2Fen%2Fhtml%2Fruntime-config-backend-se
> > > tt
> > > in
> > > gs.html%23GUC-BACKEND-APPLICATION-NAME&data=05%7C01%7Ctodd.stein%4
> > > 0m
> > > ic
> > > rofocus.com%7C9276e0e0ddb64c804e0108db2ebeb357%7C856b813c16e549a58
> > > 5e
> > > c6
> > > f081e13b527%7C0%7C0%7C638155168831102214%7CUnknown%7CTWFpbGZsb3d8e
> > > yJ
> > > WI
> > > joiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C30
> > > 00
> > > %7
> > > C%7C%7C&sdata=DrL8VzVxtQi%2FnGr5m1oK526MYhUq5wYLL2xhbhj6hAE%3D&res
> > > er
> > > ve
> > > d=0
> > >
> > > > [postgres at catvmtspg02a DBToolkit]$ psql -x -h 10.78.121.1 -p 9999 -U pgpool postgres -c "show pool_nodes"
> > > > Password for user pgpool:
> > > > -[ RECORD 1 ]----------+-----------------------------
> > > > node_id | 0
> > > > hostname | catvmtspg02a.domain.net
> > > > port | 5432
> > > > status | up
> > > > pg_status | up
> > > > lb_weight | 0.333333
> > > > role | primary
> > > > pg_role | primary
> > > > select_cnt | 0
> > > > load_balance_node | true
> > > > replication_delay | 0
> > > > replication_state |
> > > > replication_sync_state |
> > > > last_status_change | 2023-03-24 10:52:59
> > > > -[ RECORD 2 ]----------+-----------------------------
> > > > node_id | 1
> > > > hostname | catvmtspg02b.domain.net
> > > > port | 5432
> > > > status | up
> > > > pg_status | up
> > > > lb_weight | 0.333333
> > > > role | standby
> > > > pg_role | standby
> > > > select_cnt | 0
> > > > load_balance_node | false
> > > > replication_delay | 0
> > > > replication_state |
> > > > replication_sync_state |
> > > > last_status_change | 2023-03-24 10:52:59
> > > > -[ RECORD 3 ]----------+-----------------------------
> > > > node_id | 2
> > > > hostname | catvmtspg02c.domain.net
> > > > port | 5432
> > > > status | up
> > > > pg_status | up
> > > > lb_weight | 0.333333
> > > > role | standby
> > > > pg_role | standby
> > > > select_cnt | 0
> > > > load_balance_node | false
> > > > replication_delay | 0
> > > > replication_state |
> > > > replication_sync_state |
> > > > last_status_change | 2023-03-24 10:52:59
> > > >
> > > > [postgres at catvmtspg02a DBToolkit]$ [postgres at catvmtspg02a
> > > > DBToolkit]$ psql -c "SELECT * FROM pg_replication_slots;" -x -[
> > > > RECORD 1 ]-------+-----------------------------
> > > > slot_name | catvmtspg02c_domain_net
> > > > plugin |
> > > > slot_type | physical
> > > > datoid |
> > > > database |
> > > > temporary | f
> > > > active | t
> > > > active_pid | 1703
> > > > xmin |
> > > > catalog_xmin |
> > > > restart_lsn | 2/2A001A88
> > > > confirmed_flush_lsn |
> > > > wal_status | reserved
> > > > safe_wal_size |
> > > > two_phase | f
> > > > -[ RECORD 2 ]-------+-----------------------------
> > > > slot_name | catvmtspg02b_domain_net
> > > > plugin |
> > > > slot_type | physical
> > > > datoid |
> > > > database |
> > > > temporary | f
> > > > active | t
> > > > active_pid | 1822
> > > > xmin |
> > > > catalog_xmin |
> > > > restart_lsn | 2/2A001A88
> > > > confirmed_flush_lsn |
> > > > wal_status | reserved
> > > > safe_wal_size |
> > > > two_phase | f
> > > >
> > > >
> > > >
> > > >
> > > > Regards,
> > > >
> > > > Todd Stein
> > > > OpsBridge Technical Success
> > > > OpenText
> > > > (Cell) +1 (941) 248-8752
> > > > tstein2 at opentext.com<mailto:tstein2 at opentext.com>
> > > >
> > >
> > >
> > > --
> > > Bo Peng <pengbo at sraoss.co.jp>
> > > SRA OSS LLC
> > > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww%2F&data=05%7C01%7Ctodd.stein%40microfocus.com%7Cd3e018bb390d4ff32a1408db30c31e79%7C856b813c16e549a585ec6f081e13b527%7C0%7C0%7C638157386819489588%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=IG0XqEqTkMkM%2FvaQng0fPbNubZ%2BssRtQUAerSmQFy%2Fw%3D&reserved=0.
> > > sraoss.co.jp%2F&data=05%7C01%7Ctodd.stein%40microfocus.com%7C9276e
> > > 0e
> > > 0d
> > > db64c804e0108db2ebeb357%7C856b813c16e549a585ec6f081e13b527%7C0%7C0
> > > %7
> > > C6
> > > 38155168831102214%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQ
> > > Ij
> > > oi
> > > V2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=xp5mk
> > > f%
> > > 2F
> > > VHbxnYwg8ZWX9kf%2BZfwQDgHXdwYrXeOWbDoc%3D&reserved=0
> >
> >
> > --
> > Bo Peng <pengbo at sraoss.co.jp>
> > SRA OSS LLC
> > https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww%2F&data=05%7C01%7Ctodd.stein%40microfocus.com%7Cd3e018bb390d4ff32a1408db30c31e79%7C856b813c16e549a585ec6f081e13b527%7C0%7C0%7C638157386819489588%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=IG0XqEqTkMkM%2FvaQng0fPbNubZ%2BssRtQUAerSmQFy%2Fw%3D&reserved=0.
> > sraoss.co.jp%2F&data=05%7C01%7Ctodd.stein%40microfocus.com%7Cb3f6344
> > f7
> > fc04ae28fc108db3015cc4d%7C856b813c16e549a585ec6f081e13b527%7C0%7C0%7
> > C6
> > 38156642410607733%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIj
> > oi
> > V2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=bvXqn9y
> > 1J
> > ZBxGPm716SE2JdUukfFxZMc92H9sumElQY%3D&reserved=0
>
>
> --
> Bo Peng <pengbo at sraoss.co.jp>
> SRA OSS LLC
> https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.
> sraoss.co.jp%2F&data=05%7C01%7Ctodd.stein%40microfocus.com%7Cd3e018bb3
> 90d4ff32a1408db30c31e79%7C856b813c16e549a585ec6f081e13b527%7C0%7C0%7C6
> 38157386819489588%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoi
> V2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=SDuLnGebJ
> aAHVe2Qk0CaHp%2FHz4a2ziacV0x5uxBDLbI%3D&reserved=0
--
Bo Peng <pengbo at sraoss.co.jp>
SRA OSS LLC
https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.sraoss.co.jp%2F&data=05%7C01%7Ctodd.stein%40microfocus.com%7Cd3e018bb390d4ff32a1408db30c31e79%7C856b813c16e549a585ec6f081e13b527%7C0%7C0%7C638157386819489588%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=SDuLnGebJaAHVe2Qk0CaHp%2FHz4a2ziacV0x5uxBDLbI%3D&reserved=0
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