My server is rebooted infrequently, usually after a kernel upgrade and
on very rare occasions when something causes it to hang. After rebooting I
always have serious issues getting postgresql running again, even though the
startup script is part of the boot sequence. Yesterday was one of those
highly unusual hangs, and I cannot restart the service. I'd like to
understand why.
When I run the Slackware script, '/etc/rc.d/rc.postgresql start' (script
attached), I'm shown a process ID and told the daemon is already running.
For example:
Starting PostgreSQL
15342
PostgreSQL daemon already running
However, there is no process ID 15342, and no postgres running. I manually
removed /tmp/.s.PGSQL.5432 and its log file. Also -- apparently in error --
the .pid file. Makes no difference.
Perhaps there's an error in the script that I'm not seeing (I didn't write
it). Regardless, if I learn why there's a problem I can fix the script and
avoid this delay and hassle restarting postgres after the daemon's been shut
down.
TIA,
Rich
--
Richard B. Shepard, Ph.D. | Integrity Credibility
Applied Ecosystem Services, Inc. | Innovation
<http://www.appl-ecosys.com> Voice: 503-667-4517 Fax: 503-667-8863
#!/bin/bash
# PostgreSQL startup script for Slackware Linux
# Copyright 2007 Adis Nezirovic <adis _at_ linux.org.ba>
# Licensed under GNU GPL v2
# Do not source this script (since it contains exit() calls)
# Before you can run postgresql you'll need to create the
# database files in /var/lib/pgsql. The following should do
# the trick.
#
# $ su postgres -c "initdb -D /var/lib/pgsql/data"
#
LOGFILE=/var/log/postgresql
DATADIR=/var/lib/pgsql/data
POSTGRES=/usr/bin/postgres
PIDFILE=postmaster.pid
# Return values (according to LSB):
# 0 - success
# 1 - generic or unspecified error
# 2 - invalid or excess argument(s)
# 3 - unimplemented feature (e.g. "reload")
# 4 - insufficient privilege
# 5 - program is not installed
# 6 - program is not configured
# 7 - program is not running
pg_ctl()
{
CMD="/usr/bin/pg_ctl $@"
su - postgres -c "$CMD"
}
if [ ! -f $POSTGRES ]; then
echo "Could not find 'postgres' binary. Maybe PostgreSQL is not
installed properly?"
exit 5
fi
case "$1" in
"start")
echo "Starting PostgreSQL"
touch $LOGFILE
chown postgres:wheel $LOGFILE
chmod 0640 $LOGFILE
if [ ! -e $DATADIR/PG_VERSION ]; then
echo "You should initialize the PostgreSQL database at
location $DATADIR"
exit 6
fi
if pgrep postgres; then
echo "PostgreSQL daemon already running"
if [ ! -f $DATADIR/$PIDFILE ]; then
echo "Warning: Missing pid file
$DATADIR/$PIDFILE"
fi
exit 1
else # remove old socket, if it exists and no daemon is running.
if [ ! -f $DATADIR/$PIDFILE ]; then
rm -f /tmp/.s.PGSQL.5432
rm -f /tmp/.s.PGSQL.5432.lock
pg_ctl start -w -l $LOGFILE -D $DATADIR
exit 0
else
echo "PostgreSQL daemon was not properly shut
down"
echo "Please remove stale pid file
$DATADIR/$PIDFILE"
exit 7
fi
fi
;;
"stop")
echo "Shutting down PostgreSQL..."
pg_ctl stop -l $LOGFILE -D $DATADIR -m smart
;;
"restart")
echo "Restarting PostgreSQL..."
pg_ctl restart -l $LOGFILE -D $DATADIR -m smart
;;
"reload")
echo "Reloading configuration for PostgreSQL..."
pg_ctl reload -l $LOGFILE -D $DATADIR -m smart
;;
"status")
if pgrep postgres; then
echo "PostgreSQL is running"
if [ ! -e $DATADIR/$PIDFILE ]; then
echo "Warning: Missing pid file
$DATADIR/$PIDFILE"
fi
exit 0
else
echo "PostgreSQL is stopped"
if [ -e $DATADIR/$PIDFILE ]; then
echo "Detected stale pid file $DATADIR/$PIDFILE"
fi
exit 0
fi
;;
*)
echo "Usage: $0 {start|stop|status|restart|reload}"
exit 1
;;
esac
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