On 5/6/19 3:46 μ.μ., Domen Šetar wrote:
Hi,
I’m using Postgresql 11.3 on Centos 7.6.18.10 server.
I have very unusual issue which I don’t know if it is OK:
I have running postgresql server with default instance:
[root@pgpmaster ~]# systemctl status postgresql-11
● postgresql-11.service - PostgreSQL 11 database server
Loaded: loaded (/usr/lib/systemd/system/postgresql-11.service; enabled;
vendor preset: disabled)
Active: active (running) since Wed 2019-06-05 14:37:21 CEST; 49s ago
Docs: https://www.postgresql.org/docs/11/static/
Process: 3552 ExecStartPre=/usr/pgsql-11/bin/postgresql-11-check-db-dir
${PGDATA} (code=exited, status=0/SUCCESS)
Main PID: 3576 (postmaster)
Tasks: 9
CGroup: /system.slice/postgresql-11.service
├─3576 /usr/pgsql-11/bin/postmaster -D /var/lib/pgsql/11/data/
├─3609 postgres: logger
├─3621 postgres: checkpointer
├─3622 postgres: background writer
├─3623 postgres: walwriter
├─3624 postgres: autovacuum launcher
├─3625 postgres: archiver
├─3626 postgres: stats collector
└─3627 postgres: logical replication launcher
Jun 05 14:37:20 pgpmaster.localhost systemd[1]: Starting PostgreSQL 11 database
server...
Jun 05 14:37:20 pgpmaster.localhost postmaster[3576]: 2019-06-05 14:37:20.923 CEST [3576]
LOG: listening on IPv4 address "0.0.0.0", port 5432
Jun 05 14:37:20 pgpmaster.localhost postmaster[3576]: 2019-06-05 14:37:20.924 CEST [3576]
LOG: listening on IPv6 address "::", port 5432
Jun 05 14:37:20 pgpmaster.localhost postmaster[3576]: 2019-06-05 14:37:20.928 CEST [3576]
LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
Jun 05 14:37:21 pgpmaster.localhost postmaster[3576]: 2019-06-05 14:37:21.026 CEST [3576]
LOG: listening on Unix socket "/tmp/.s.PGSQL.5432"
Jun 05 14:37:21 pgpmaster.localhost postmaster[3576]: 2019-06-05 14:37:21.123
CEST [3576] LOG: redirecting log output to logging collector process
Jun 05 14:37:21 pgpmaster.localhost postmaster[3576]: 2019-06-05 14:37:21.123 CEST [3576]
HINT: Future log output will appear in directory "log".
Jun 05 14:37:21 pgpmaster.localhost systemd[1]: Started PostgreSQL 11 database
server.
If I restart it using systemctl restart postgresql-11 command, everything is
OK, but if I use commands:
# pg_ctl -D /var/lib/pgsql/11/data/ -m immediate stop
# pg_ctl -D /var/lib/pgsql/11/data/ -m immediate start
Don't run those as root. I guess you didn't run pg_ctl as root (since it worked)
Then I get following situtation:
# systemctl status postgresql-11
● postgresql-11.service - PostgreSQL 11 database server
Loaded: loaded (/usr/lib/systemd/system/postgresql-11.service; enabled;
vendor preset: disabled)
*Active: inactive (dead) since Wed 2019-06-05 14:41:32 CEST; 1min 40s ago*
Docs: https://www.postgresql.org/docs/11/static/
Process: 3576 ExecStart=/usr/pgsql-11/bin/postmaster -D ${PGDATA}
(code=exited, status=0/SUCCESS)
Process: 3552 ExecStartPre=/usr/pgsql-11/bin/postgresql-11-check-db-dir
${PGDATA} (code=exited, status=0/SUCCESS)
Main PID: 3576 (code=exited, status=0/SUCCESS)
Jun 05 14:37:20 pgpmaster.localhost systemd[1]: Starting PostgreSQL 11 database
server...
Jun 05 14:37:20 pgpmaster.localhost postmaster[3576]: 2019-06-05 14:37:20.923 CEST [3576]
LOG: listening on IPv4 address "0.0.0.0", port 5432
Jun 05 14:37:20 pgpmaster.localhost postmaster[3576]: 2019-06-05 14:37:20.924 CEST [3576]
LOG: listening on IPv6 address "::", port 5432
Jun 05 14:37:20 pgpmaster.localhost postmaster[3576]: 2019-06-05 14:37:20.928 CEST [3576]
LOG: listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
Jun 05 14:37:21 pgpmaster.localhost postmaster[3576]: 2019-06-05 14:37:21.026 CEST [3576]
LOG: listening on Unix socket "/tmp/.s.PGSQL.5432"
Jun 05 14:37:21 pgpmaster.localhost postmaster[3576]: 2019-06-05 14:37:21.123
CEST [3576] LOG: redirecting log output to logging collector process
Jun 05 14:37:21 pgpmaster.localhost postmaster[3576]: 2019-06-05 14:37:21.123 CEST [3576]
HINT: Future log output will appear in directory "log".
Jun 05 14:37:21 pgpmaster.localhost systemd[1]: Started PostgreSQL 11 database
server.
# ps agx | grep postgre
4592 pts/0 S 0:00 /usr/pgsql-11/bin/postgres -D /var/lib/pgsql/11/data
4593 ? Ss 0:00 postgres: logger
4595 ? Ss 0:00 postgres: checkpointer
4596 ? Ss 0:00 postgres: background writer
4597 ? Ss 0:00 postgres: walwriter
4598 ? Ss 0:00 postgres: autovacuum launcher
4599 ? Ss 0:00 postgres: archiver
4600 ? Ss 0:00 postgres: stats collector
4601 ? Ss 0:00 postgres: logical replication launcher
4630 pts/0 S+ 0:00 grep --color=auto postgre
$ pg_ctl -D /var/lib/pgsql/11/data/ status
pg_ctl: server is running (PID: 4592)
/usr/pgsql-11/bin/postgres "-D" "/var/lib/pgsql/11/data"
Systemctl shows that database is dead, but it is actually running.
Can someone explain this behavioure?
if you bypass systemctl then systemd has no way to tell if the service is up or
down just by grep.
Best regards!
izum
Domen Šetar
/Computer Systems Support/
IZUM – Institute of Information Science| Prešernova ulica 17 | 2000 Maribor
|Slovenia/
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<http://www.izum.si/>|domen.se...@izum.si <mailto:domen.se...@izum.si>
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