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Adjust postmaster to recognize that a lockfile containing its parent's PID

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must be stale.  Tweak example startup scripts to not use pg_ctl but launch
the postmaster directly, thereby ensuring that only the postmaster's direct
parent shell will be a postgres-owned process.  In combination these should
fix the longstanding problem of the postmaster sometimes refusing to start
during reboot because it thinks the old lockfile is not stale.
This commit is contained in:
Tom Lane
2004-10-01 18:30:25 +00:00
parent 8bbfa16624
commit c8196c87a7
4 changed files with 72 additions and 37 deletions
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28
contrib/start-scripts/linux
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@ -24,7 +24,7 @@
# Original author: Ryan Kirkpatrick <pgsql@rkirkpat.net>
# $PostgreSQL: pgsql/contrib/start-scripts/linux,v 1.6 2003/11/29 19:51:36 pgsql Exp $
# $PostgreSQL: pgsql/contrib/start-scripts/linux,v 1.7 2004/10/01 18:30:21 tgl Exp $
## EDIT FROM HERE
@ -34,7 +34,7 @@ prefix=/usr/local/pgsql
# Data directory
PGDATA="/usr/local/pgsql/data"
# Who to run pg_ctl as, should be "postgres".
# Who to run the postmaster as, usually "postgres". (NOT "root")
PGUSER=postgres
# Where to keep a log file
@ -54,38 +54,44 @@ fi
# The path that is to be used for the script
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
# What to use to start up the postmaster
DAEMON="$prefix/bin/pg_ctl"
# What to use to start up the postmaster (we do NOT use pg_ctl for this,
# as it adds no value and can cause the postmaster to misrecognize a stale
# lock file)
DAEMON="$prefix/bin/postmaster"
# What to use to shut down the postmaster
PGCTL="$prefix/bin/pg_ctl"
set -e
# Only start if we can find pg_ctl.
test -f $DAEMON || exit 0
# Only start if we can find the postmaster.
test -x $DAEMON || exit 0
# Parse command line parameters.
case $1 in
start)
$ECHO_N "Starting PostgreSQL: "$ECHO_C
su - $PGUSER -c "$DAEMON start -D '$PGDATA' -s -l $PGLOG"
su - $PGUSER -c "$DAEMON -D '$PGDATA' &" >>$PGLOG 2>&1
echo "ok"
;;
stop)
echo -n "Stopping PostgreSQL: "
su - $PGUSER -c "$DAEMON stop -D '$PGDATA' -s -m fast"
su - $PGUSER -c "$PGCTL stop -D '$PGDATA' -s -m fast"
echo "ok"
;;
restart)
echo -n "Restarting PostgreSQL: "
su - $PGUSER -c "$DAEMON restart -D '$PGDATA' -s -m fast -l $PGLOG"
su - $PGUSER -c "$PGCTL stop -D '$PGDATA' -s -m fast -w"
su - $PGUSER -c "$DAEMON -D '$PGDATA' &" >>$PGLOG 2>&1
echo "ok"
;;
reload)
echo -n "Reload PostgreSQL: "
su - $PGUSER -c "$DAEMON reload -D '$PGDATA' -s"
su - $PGUSER -c "$PGCTL reload -D '$PGDATA' -s"
echo "ok"
;;
status)
su - $PGUSER -c "$DAEMON status -D '$PGDATA'"
su - $PGUSER -c "$PGCTL status -D '$PGDATA'"
;;
*)
# Print help