Re: To Adam Brusselback 2017-11-11 
<20171111205316.u56lkmkakdmcx...@msg.df7cb.de>
> I'm investigating if it's a good idea to tell systemd to ignore the
> exit code of pg_ctl(cluster).

Telling systemd to ignore ExecStart errors seems to be the correct
solution. The service will still be active, with the startup error
being shown:

● postgresql@10-main.service - PostgreSQL Cluster 10-main
   Loaded: loaded (/lib/systemd/system/postgresql@.service; enabled; vendor 
preset: enabled)
   Active: active (running) since Sun 2017-11-12 13:24:21 CET; 210ms ago
  Process: 31892 ExecStop=/usr/bin/pg_ctlcluster --skip-systemctl-redirect -m 
fast 10-main stop (code=exited, status=0/SUCCESS)
  Process: 31922 ExecStart=/usr/bin/pg_ctlcluster --skip-systemctl-redirect 
10-main start (code=exited, status=1/FAILURE)
 Main PID: 31928 (postgres)
    Tasks: 8 (limit: 4915)
   CGroup: /system.slice/system-postgresql.slice/postgresql@10-main.service
           ├─31928 /usr/lib/postgresql/10/bin/postgres -D 
/var/lib/postgresql/10/main -c 
config_file=/etc/postgresql/10/main/postgresql.conf
           ├─31931 postgres: 10/main: checkpointer process
           ├─31932 postgres: 10/main: writer process
           ├─31933 postgres: 10/main: wal writer process
           ├─31934 postgres: 10/main: autovacuum launcher process
           ├─31935 postgres: 10/main: archiver process
           ├─31936 postgres: 10/main: stats collector process
           └─31937 postgres: 10/main: bgworker: logical replication launcher

Nov 12 13:24:20 lehmann systemd[1]: Starting PostgreSQL Cluster 10-main...
Nov 12 13:24:21 lehmann postgresql@10-main[31922]: Error: 
/usr/lib/postgresql/10/bin/pg_ctl /usr/lib/postgresql/10/bin/pg_ctl start -D 
/var/lib/postgresql/10/main -l /var/log/postgresql/postgresql-10-main.log -t 0 
-s -o  -c config_file="/etc/postgresql/10/main/postgresql.conf"  exited with 
status 1:
Nov 12 13:24:21 lehmann postgresql@10-main[31922]: pg_ctl: server did not start 
in time
Nov 12 13:24:21 lehmann systemd[1]: postgresql@10-main.service: PID file 
/var/run/postgresql/10-main.pid not readable (yet?) after start: No such file 
or directory
Nov 12 13:24:21 lehmann systemd[1]: Started PostgreSQL Cluster 10-main.

Fixed in 
https://anonscm.debian.org/cgit/pkg-postgresql/postgresql-common.git/commit/?id=fc57e655c71e8f6bcb3010b054f5adbf32a224d7
 , thanks for the report!

Christoph


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