Wait after postgres has finished

[stephdl]

With Slow machine we could have some issue that postgres has not finished to start

webtop use postgresql 9 we cannot use pg_isready :/

[webtop1@R1-pve state]$ podman  exec postgres ls -la /usr/bin/pg_isready 
lrwxrwxrwx. 1 root root 37 Jul 11  2017 /usr/bin/pg_isready -> ../share/postgresql-common/pg_wrapper
[webtop1@R1-pve state]$ podman  exec postgres ls -la /usr/share/postgresql-common/pg_wrapper
-rwxr-xr-x. 1 root root 8935 May 23  2017 /usr/share/postgresql-common/pg_wrapper
[webtop1@R1-pve state]$ podman  exec postgres /usr/share/postgresql-common/pg_wrapper
Error: pg_wrapper called directly but no program given as argument
[webtop1@R1-pve state]$ podman  exec postgres /usr/share/postgresql-common/pg_wrapper pg_isready
Error: pg_wrapper: pg_isready was not found in /usr/lib/postgresql/9.2/bin
[webtop1@R1-pve state]$ podman  exec postgres ls /usr/lib/postgresql/9.2/bin/
clusterdb
createdb
createlang
createuser
dropdb
droplang
dropuser
initdb
oid2name
pg_archivecleanup
pg_basebackup
pgbench
pg_controldata
pg_ctl
pg_dump
pg_dumpall
pg_receivexlog
pg_resetxlog
pg_restore
pg_standby
pg_test_fsync
pg_test_timing
pg_upgrade
postgres
postmaster
psql
reindexdb
vacuumdb
vacuumlo