init: add PGSTARTTIMEOUT config env variable

* postgresql.init.in (PGSTARTTIMEOUT): New variable.
(start): Use postgresql-ctl and respect PGSTARTTIMEOUT.
* postgresql.service.in: Better document the timeouts.
(PGSTARTTIMEOUT): New env variable.
(ExecStart): Respect PGSTARTTIMEOUT.
* NEWS: Document.

Author: praiskup

NEWS

@@ -18,6 +18,8 @@ New in 3.0 version
 * The sysvinit support should be OK finally, sysvinit system is now
   automatically detected without --with-sysvinit configure option.
 
+* The starting timeout is now configurable via PGSTARTTIMEOUT.
+
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 New in 2.0 version

postgresql.init.in

@@ -73,6 +73,7 @@ PG_OOM_ADJ=-17
 
 export PGDATA
 export PGPORT
+export PGSTARTTIMEOUT
 
 lockfile="/var/lock/subsys/${NAME}"
 
@@ -111,13 +112,22 @@ start()
     # is already running.  We should probably 'status' first and start only if
     # postmaster is down.  This just unnecessarily wastes time and generates
     # too much (false) rush in $PGLOG.
+    #
+    # The maximum waiting time PGSTARTTIMEOUT is set to 30 second to not hold
+    # the system too long.  See `man pg_ctl & -w option`.  This is not issue in
+    # case of systemd.
+
     run_cmd_as_dbadmin \
-            "$PGENGINE/postgres ${PGPORT+-o "-p $PGPORT"} \
-                    -D '$PGDATA' ${PGOPTS} &"               \
+            "@libexecdir@/postgresql-ctl start -D ${PGDATA} -s \
+                -w -t ${PGSTARTTIMEOUT-30}" \
             "$PGLOG" "$PGLOG"
 
-	# TODO: parametrize
-	sleep 2
+    if test $? -ne 0; then
+        failure "$PSQL_START"
+        echo
+        script_result=1
+        return
+    fi
 
 	pid=`head -n 1 "$PGDATA/postmaster.pid" 2>/dev/null`
 	if [ "x$pid" != x ]

postgresql.service.in

@@ -26,18 +26,24 @@ OOMScoreAdjust=-1000
 Environment=PG_OOM_ADJUST_FILE=/proc/self/oom_score_adj
 Environment=PG_OOM_ADJUST_VALUE=0
 
+# Maximum number of seconds pg_ctl will wait for postgres to start.  Note that
+# PGSTARTTIMEOUT should be less than TimeoutSec value.
+Environment=PGSTARTTIMEOUT=270
+
 @PGDATA_ENVIRONMENT@
 
 ExecStartPre=@libexecdir@/postgresql-check-db-dir %N
 
 # Use convenient postgresql-ctl wrapper instead of directly pg_ctl.  See the
 # postgresql-ctl file itself for more info.
 
-ExecStart=@libexecdir@/postgresql-ctl start -D ${PGDATA} -s -w -t 300
+ExecStart=@libexecdir@/postgresql-ctl start -D ${PGDATA} -s -w -t ${PGSTARTTIMEOUT}
 ExecStop=@libexecdir@/postgresql-ctl stop -D ${PGDATA} -s -m fast
 ExecReload=@libexecdir@/postgresql-ctl reload -D ${PGDATA} -s
 
-# Give a reasonable amount of time for the server to start up/shut down
+# Give a reasonable amount of time for the server to start up/shut down.
+# Ideally, the timeout for starting PostgreSQL server should be handled more
+# nicely by pg_ctl in ExecStart, so keep its timeout smaller than this value.
 TimeoutSec=300
 
 [Install]