postgresql/postgresql.init

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#!/bin/sh
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#
# postgresql This is the init script for starting up the PostgreSQL
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# server.
#
# chkconfig: - 64 36
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# description: PostgreSQL database server.
# processname: postmaster
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# pidfile: /var/run/postmaster.PORT.pid
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# This script is slightly unusual in that the name of the daemon (postmaster)
# is not the same as the name of the subsystem (postgresql)
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# PGVERSION is the full package version, e.g., 9.0.2
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# Note: the specfile inserts the correct value during package build
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PGVERSION=xxxx
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# PGMAJORVERSION is major version, e.g., 9.0 (this should match PG_VERSION)
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PGMAJORVERSION=`echo "$PGVERSION" | sed 's/^\([0-9]*\.[0-9]*\).*$/\1/'`
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# PREVMAJORVERSION is the previous major version, e.g., 8.4, for upgrades
# Note: the specfile inserts the correct value during package build
PREVMAJORVERSION=xxxx
# PREVPGENGINE is the directory containing the previous postmaster executable
# Note: the specfile inserts the correct value during package build
PREVPGENGINE=xxxx
# PGDOCDIR is the directory containing the package's documentation
# Note: the specfile inserts the correct value during package build
PGDOCDIR=xxxx
# Source function library.
. /etc/rc.d/init.d/functions
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# Get network config.
. /etc/sysconfig/network
# Find the name of the script
NAME=`basename $0`
if [ ${NAME:0:1} = "S" -o ${NAME:0:1} = "K" ]
then
NAME=${NAME:3}
fi
# For SELinux we need to use 'runuser' not 'su'
if [ -x /sbin/runuser ]
then
SU=runuser
else
SU=su
fi
# Set defaults for configuration variables
PGENGINE=/usr/bin
PGPORT=5432
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PGDATA=/var/lib/pgsql/data
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PGLOG=/var/lib/pgsql/pgstartup.log
# Value to set as postmaster process's oom_adj
PG_OOM_ADJ=-17
# Override defaults from /etc/sysconfig/pgsql if file is present
[ -f /etc/sysconfig/pgsql/${NAME} ] && . /etc/sysconfig/pgsql/${NAME}
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export PGDATA
export PGPORT
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lockfile="/var/lock/subsys/${NAME}"
pidfile="/var/run/postmaster.${PGPORT}.pid"
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script_result=0
start(){
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[ -x "$PGENGINE/postmaster" ] || exit 5
PSQL_START=$"Starting ${NAME} service: "
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# Make sure startup-time log file is valid
if [ ! -e "$PGLOG" -a ! -h "$PGLOG" ]
then
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touch "$PGLOG" || exit 4
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chown postgres:postgres "$PGLOG"
chmod go-rwx "$PGLOG"
[ -x /sbin/restorecon ] && /sbin/restorecon "$PGLOG"
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fi
# Check for the PGDATA structure
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if [ -f "$PGDATA/PG_VERSION" ] && [ -d "$PGDATA/base" ]
then
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# Check version of existing PGDATA
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if [ x`cat "$PGDATA/PG_VERSION"` = x"$PGMAJORVERSION" ]
then
: A-OK
elif [ x`cat "$PGDATA/PG_VERSION"` = x"$PREVMAJORVERSION" ]
then
echo
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echo $"An old version of the database format was found."
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echo $"Use \"service postgresql upgrade\" to upgrade to version $PGMAJORVERSION."
echo $"See $PGDOCDIR/README.rpm-dist for more information."
exit 1
else
echo
echo $"An old version of the database format was found."
echo $"You need to dump and reload before using PostgreSQL $PGMAJORVERSION."
echo $"See $PGDOCDIR/README.rpm-dist for more information."
exit 1
fi
else
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# No existing PGDATA! Warn the user to initdb it.
echo
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echo $"$PGDATA is missing. Use \"service postgresql initdb\" to initialize the cluster first."
echo_failure
echo
exit 1
fi
echo -n "$PSQL_START"
test x"$PG_OOM_ADJ" != x && echo "$PG_OOM_ADJ" > /proc/self/oom_adj
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$SU -l postgres -c "$PGENGINE/postmaster -p '$PGPORT' -D '$PGDATA' ${PGOPTS} &" >> "$PGLOG" 2>&1 < /dev/null
sleep 2
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pid=`head -n 1 "$PGDATA/postmaster.pid" 2>/dev/null`
if [ "x$pid" != x ]
then
success "$PSQL_START"
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touch "$lockfile"
echo $pid > "$pidfile"
echo
else
failure "$PSQL_START"
echo
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script_result=1
fi
}
stop(){
echo -n $"Stopping ${NAME} service: "
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if [ -e "$lockfile" ]
then
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$SU -l postgres -c "$PGENGINE/pg_ctl stop -D '$PGDATA' -s -m fast" > /dev/null 2>&1 < /dev/null
ret=$?
if [ $ret -eq 0 ]
then
echo_success
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rm -f "$pidfile"
rm -f "$lockfile"
else
echo_failure
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script_result=1
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fi
else
# not running; per LSB standards this is "ok"
echo_success
fi
echo
}
restart(){
stop
start
}
condrestart(){
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[ -e "$lockfile" ] && restart || :
}
reload(){
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$SU -l postgres -c "$PGENGINE/pg_ctl reload -D '$PGDATA' -s" > /dev/null 2>&1 < /dev/null
}
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# code shared between initdb and upgrade actions
perform_initdb(){
if [ ! -e "$PGDATA" -a ! -h "$PGDATA" ]
then
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mkdir -p "$PGDATA" || return 1
chown postgres:postgres "$PGDATA"
chmod go-rwx "$PGDATA"
fi
# Clean up SELinux tagging for PGDATA
[ -x /sbin/restorecon ] && /sbin/restorecon "$PGDATA"
# Make sure the startup-time log file is OK, too
if [ ! -e "$PGLOG" -a ! -h "$PGLOG" ]
then
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touch "$PGLOG" || return 1
chown postgres:postgres "$PGLOG"
chmod go-rwx "$PGLOG"
[ -x /sbin/restorecon ] && /sbin/restorecon "$PGLOG"
fi
# Initialize the database
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$SU -l postgres -c "$PGENGINE/initdb --pgdata='$PGDATA' --auth='ident'" >> "$PGLOG" 2>&1 < /dev/null
# Create directory for postmaster log
mkdir "$PGDATA/pg_log"
chown postgres:postgres "$PGDATA/pg_log"
chmod go-rwx "$PGDATA/pg_log"
if [ -f "$PGDATA/PG_VERSION" ]
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then
return 0
fi
return 1
}
initdb(){
if [ -f "$PGDATA/PG_VERSION" ]
then
echo -n $"Data directory is not empty!"
echo_failure
echo
script_result=1
else
echo -n $"Initializing database: "
if perform_initdb
then
echo_success
else
echo_failure
script_result=1
fi
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echo
fi
}
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upgrade(){
# must see previous version in PG_VERSION
if [ ! -f "$PGDATA/PG_VERSION" -o \
x`cat "$PGDATA/PG_VERSION"` != x"$PREVMAJORVERSION" ]
then
echo
echo $"Cannot upgrade because database is not of version $PREVMAJORVERSION."
echo_failure
echo
exit 1
fi
if [ ! -x "$PGENGINE/pg_upgrade" ]
then
echo
echo $"Please install the postgresql-upgrade RPM."
echo_failure
echo
exit 5
fi
# Make sure service is stopped
stop
echo -n $"Upgrading database: "
# Set up log file for pg_upgrade
PGUPLOG=/var/lib/pgsql/pgupgrade.log
rm -f "$PGUPLOG"
touch "$PGUPLOG" || exit 1
chown postgres:postgres "$PGUPLOG"
chmod go-rwx "$PGUPLOG"
[ -x /sbin/restorecon ] && /sbin/restorecon "$PGUPLOG"
# Move old DB to PGDATAOLD
PGDATAOLD="${PGDATA}-old"
rm -rf "$PGDATAOLD"
mv "$PGDATA" "$PGDATAOLD" || exit 1
# Create empty new-format database
if perform_initdb
then
# Do the upgrade
$SU -l postgres -c "$PGENGINE/pg_upgrade \
'--old-bindir=$PREVPGENGINE' \
'--new-bindir=$PGENGINE' \
'--old-datadir=$PGDATAOLD' \
'--new-datadir=$PGDATA' \
--link \
'--old-port=$PGPORT' '--new-port=$PGPORT' \
--user=postgres" >> "$PGUPLOG" 2>&1 < /dev/null
if [ $? -ne 0 ]
then
# pg_upgrade failed
script_result=1
fi
else
# initdb failed
script_result=1
fi
if [ $script_result -eq 0 ]
then
echo_success
else
# Clean up after failure
rm -rf "$PGDATA"
mv "$PGDATAOLD" "$PGDATA"
echo_failure
fi
echo
echo $"See $PGUPLOG for details."
}
# See how we were called.
case "$1" in
start)
start
;;
stop)
stop
;;
status)
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status -p "$pidfile" postmaster
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script_result=$?
;;
restart)
restart
;;
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condrestart|try-restart)
condrestart
;;
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reload)
reload
;;
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force-reload)
restart
;;
initdb)
initdb
;;
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upgrade)
upgrade
;;
*)
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echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload|initdb|upgrade}"
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exit 2
esac
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exit $script_result