Re: PostgreSQL 12 service failing in Ubuntu 20.04 after a few hours - Mailing list pgsql-general

On 1 Jan 2023, at 11:00 PM, Adrian Klaver <adrian.klaver@aklaver.com> wrote:

On 1/1/23 12:51, Antonis Christodoulou wrote:

Hi,
I have set up PostgreSQL according to this link:
https://www.cherryservers.com/blog/how-to-install-and-setup-postgresql-server-on-ubuntu-20-04 <https://www.cherryservers.com/blog/how-to-install-and-setup-postgresql-server-on-ubuntu-20-04>
The issue is that after a few hours of operation, even if I don’t access the database at all, the Postgres process fails:
*christan@vultr*:*~*$ systemctl status postgresql*
*●*postgresql.service - PostgreSQL RDBMS
Loaded: loaded (/lib/systemd/system/postgresql.service; disabled; vendor preset: enabled)
Active: *active (exited)*since Sat 2022-12-31 19:56:56 UTC; 24h ago
Process: 3330722 ExecStart=/bin/true (code=exited, status=0/SUCCESS)
Main PID: 3330722 (code=exited, status=0/SUCCESS)
*●*postgresql@12-main.service <mailto:postgresql@12-main.service> - PostgreSQL Cluster 12-main
Loaded: loaded (/lib/systemd/system/postgresql@.service; enabled-runtime; vendor preset: enabled)
Active: *failed*(Result: exit-code) since Sat 2022-12-31 21:33:52 UTC; 23h ago
Process: 3330697 ExecStart=/usr/bin/pg_ctlcluster --skip-systemctl-redirect 12-main start (code=exited, status=0/SUCCESS)
Process: 3341739 ExecStop=/usr/bin/pg_ctlcluster --skip-systemctl-redirect -m fast 12-main stop *(code=exited, status=2)*
Main PID: 3330702 (code=exited, status=0/SUCCESS)
Moreover, it looks like there is some process stuck into some eternal loop, eating up 4 cores:
*christan@vultr*:*~*$ ps -ef | grep postgres
*postgres*3342383 1  0  2022 ?  00:00:00 FzXlkULu
*postgres*3344758 1 99  2022 ?  3-14:39:11 OElid7Dp
*postgres*3419125 1 18 13:57 ?  01:17:03 tracepath
christan 3463982 3462489  0 20:44 pts/0  00:00:00 grep --color=auto *postgres*

The above and the below look weird.

Is this machine open to the world?

*
*
*christan@vultr*:*~*$ top -p 3344758
PID USER  PR  NI  VIRT  RES  SHR S  %CPU  %MEM TIME+ COMMAND
3344758 postgres  20 0 2443428 2.3g  4 S 282.3  29.5 5201:46 OElid7Dp
Doing just systemctl postgresql doesn’t restart the process, I have to manually kill all the above processes then do systemctl restart.
Lastly, in the journalctl I see the following logs:
Dec 31 21:33:35 vultr.guest sudo[3340093]: *pam_unix(sudo:auth): co**nversation failed*
Dec 31 21:33:35 vultr.guest sudo[3340093]: *pam_unix(sudo:auth): auth could not identify password for [postgres]*
Dec 31 21:33:35 vultr.guest sudo[3340093]: *postgres : user NOT in sudoers ; TTY=unknown ; PWD=/var/lib/postgresql/12/main ; USER=root ; COMMAND=/usr/sbin/sysctl kernel.nmi_watchdog=0*
Dec 31 21:33:52 vultr.guest crontab[3341582]: (postgres) LIST (postgres)
Dec 31 21:33:52 vultr.guest crontab[3341584]: (postgres) REPLACE (postgres)
Dec 31 21:33:52 vultr.guest crontab[3341585]: (postgres) LIST (postgres)
Dec 31 21:33:52 vultr.guest crontab[3341588]: (postgres) LIST (postgres)
What am I missing here, maybe I have to make sure that postgres user has sudo rights?
Regards,
Antonis

-- 
Adrian Klaver
adrian.klaver@aklaver.com