postgresql-setup fails on "systemctl show -p Environment" about docker-systemctl-replacement HOT 3 CLOSED

> systemctl show postgresql.service
INFO:systemctl:EXEC BEGIN /usr/bin/systemctl show postgresql.service --system
INFO:systemctl:try read unit postgresql.service
Id=postgresql.service
Names=postgresql.service
Description=PostgreSQL database server
MainPID=0
SubState=dead
ActiveState=inactive
LoadState=loaded
UnitFileState=disabled
TimeoutStartUSec=3min 20s
TimeoutStopUSec=3min 20s
Environment=PGPORT=5432 PGDATA=/var/lib/pgsql/data

> systemctl show postgresql.service -p Environment
INFO:systemctl:EXEC BEGIN /usr/bin/systemctl show postgresql.service --system
INFO:systemctl:try read unit postgresql.service
Environment=PGPORT=5432 PGDATA=/var/lib/pgsql/data

+ systemctl show -p Environment postgresql.service
Traceback (most recent call last):
  File "/usr/bin/systemctl", line 4155, in <module>
    loggfile = logging.FileHandler(_systemctl_extra_log)
  File "/usr/lib64/python2.7/logging/__init__.py", line 902, in __init__
    StreamHandler.__init__(self, self._open())
  File "/usr/lib64/python2.7/logging/__init__.py", line 925, in _open
    stream = open(self.baseFilename, self.mode)
IOError: [Errno 13] Permission denied: '/var/log/systemctl.log'

if test "$(id -u)" -eq 0; then
    exec $SU -s /bin/sh postgres -c "$cmd"
fi
test "$(id -u)" -eq 0 && exit 1