postgresql.init

   1 #!/bin/sh
   2 #
   3 # postgresql    This is the init script for starting up the PostgreSQL
   4 #               server
   5 #
   6 # chkconfig:    345 84 25
   7 #
   8 # description:  Starts and stops the PostgreSQL backend daemon that handles \
   9 #               all database requests.
  10 #
  11 # processname:  postmaster
  12
  13 cd /
  14
  15 # Source function library
  16 . /etc/rc.d/init.d/functions
  17
  18 # Get network config
  19 . /etc/sysconfig/network
  20
  21 # Get service config
  22 if [ -f /etc/sysconfig/postgresql ]; then
  23         . /etc/sysconfig/postgresql
  24 else
  25         nls "Error: %s not found" /etc/sysconfig/postgresql
  26         nls " PostgreSQL can't be run."
  27         exit 1
  28 fi
  29
  30 if [ ! "$PG_DB_CLUSTERS" ]; then
  31         nls "Error: PG_DB_CLUSTERS not found or is empty"
  32         nls " PostgreSQL can't be run."
  33         exit 1
  34 fi
  35
  36 # Check that networking is up.
  37 if is_yes "${NETWORKING}"; then
  38         if [ ! -f /var/lock/subsys/network -a "$1" != stop -a "$1" != status -a "$1" != init ]; then
  39                 msg_network_down PostgreSQL
  40                 exit 1
  41         fi
  42 else
  43         exit 0
  44 fi
  45
  46 action="$1"
  47
  48 # any db cluster as command line argument?
  49 if [ $# -gt 1 ]; then
  50         shift
  51         # perform action for specified clusters only
  52         DB_CLUSTERS="$@"
  53 else
  54         DB_CLUSTERS="$PG_DB_CLUSTERS"
  55 fi
  56
  57 #
  58 # Useful functions.
  59 #
  60
  61 #
  62 # check for postgresql status
  63 #
  64 # arguments:
  65 # $1 - db cluster
  66 #
  67 # sets variables:
  68 # PG_STATUS = running | not running
  69 # PG_PID    = pid of postmaster process
  70 #
  71 pgstatus() {
  72         PG_STATUS="unknown"
  73         PG_PID="unknown"
  74         output=`TMPDIR=/tmp su - postgres -c "/usr/bin/pg_ctl -D $1 status"`
  75         status=`echo $?`
  76
  77         if [ $status -eq 1 ]; then
  78                 PG_STATUS="not running"
  79         elif [ $status -eq 0 ]; then
  80                 PG_STATUS="running"
  81         # or maybe grab it from postmaster.pid file?
  82                 PG_PID=`echo "$output" | sed 's/^pg_ctl:.*PID: \([0-9]\+\).*/\1/' | head -1`
  83         fi
  84 }
  85
  86 #
  87 # start postgresql and display appropriate messages
  88 #
  89 # arguments:
  90 # $1 - db cluster
  91 #
  92 pgstart() {
  93         msg_starting "PostgreSQL $1"
  94         busy
  95         TMPDIR=/tmp su - postgres -c "/usr/bin/pg_ctl -w -D $1 start 2>&1 >/dev/null"
  96         sleep 1
  97         pgstatus "$1"
  98
  99         if [ "$PG_STATUS" != "unknown" -a "$PG_PID" != "unknown" ]; then
 100                 ok
 101         else
 102                 fail
 103         fi
 104 }
 105
 106 #
 107 # check for running postgresql instances; if any instance is running then
 108 # create subsys lock file
 109 #
 110 pgsubsys() {
 111         # check for every defined db cluster in sysconfig file
 112         for pgdir in $PG_DB_CLUSTERS; do
 113                 pgstatus "$pgdir"
 114                 if [ "$PG_STATUS" = "running" ]; then
 115                         touch /var/lock/subsys/postgresql
 116                         return
 117                 fi
 118         done
 119         rm -f /var/lock/subsys/postgresql
 120 }
 121
 122 #
 123 # End of useful functions.
 124 #
 125
 126
 127 # See how we were called.
 128 # Every action is performed for all given (all configured by default)
 129 # db clusters.
 130 case "$action" in
 131   start)
 132         for pgdir in $DB_CLUSTERS; do
 133                 pgstatus "$pgdir"
 134                 if [ "$PG_STATUS" = "running" ]; then
 135                         # pg_ctl status can misinform us about postgresql status
 136                         # so let's check if postmaster is really alive
 137                         if ps ax | grep -v grep | grep -q "$PG_PID"; then
 138                                 msg_already_running "PostgreSQL $pgdir"
 139                         else
 140                                 # pg_ctl has misinformed us about postgresql status;
 141                                 # remove pid file and run postgresql
 142                                 msg_not_running "PostgreSQL $pgdir"
 143                                 rm -f $pgdir/postmaster.pid
 144                                 pgstart "$pgdir"
 145                         fi
 146                 else
 147                         pgstart "$pgdir"
 148                 fi
 149         done
 150         pgsubsys
 151         ;;
 152   stop)
 153         for pgdir in $DB_CLUSTERS; do
 154                 pgstatus "$pgdir"
 155                 if [ "$PG_STATUS" = "not running" ]; then
 156                         msg_not_running "PostgreSQL $pgdir"
 157                 else
 158                         msg_stopping "PostgreSQL $pgdir"
 159                         busy
 160                                 # is postgresql really alive?
 161                         if ps ax | grep -v grep | grep -q "$PG_PID"; then
 162                                 TMPDIR=/tmp su - postgres -c "/usr/bin/pg_ctl -w -D $pgdir stop -m fast 2>&1 >/dev/null"
 163                                 pgstatus "$pgdir"
 164                                 if [ "$PG_STATUS" != "not running" ]; then
 165                                         fail
 166                                 else
 167                                         ok
 168                                 fi
 169                         else
 170                                 # postgresql is not really alive; pg_ctl misinformed us
 171                                 # about the status
 172                                 died
 173                         fi
 174                         rm -f $pgdir/postmaster.pid
 175                 fi
 176         done
 177         pgsubsys
 178         ;;
 179   status)
 180         for pgdir in $DB_CLUSTERS; do
 181         TMPDIR=/tmp su - postgres -c "/usr/bin/pg_ctl -D $pgdir status"
 182                 done
 183         ;;
 184   restart)
 185         $0 stop "$DB_CLUSTERS"
 186         $0 start "$DB_CLUSTERS"
 187         ;;
 188   reload|force-reload)
 189         for pgdir in $DB_CLUSTERS; do
 190                 pgstatus "$pgdir"
 191                 if [ "$PG_STATUS" = "not running" ]; then
 192                         msg_not_running "PostgreSQL $pgdir"
 193                 else
 194                         msg_reloading "PostgreSQL $pgdir"
 195                         busy
 196                         # is postgresql really alive?
 197                         if ps ax | grep -v grep | grep -q "$PG_PID"; then
 198                                 TMPDIR=/tmp su - postgres -c "/usr/bin/pg_ctl -D $pgdir restart 2>&1 >/dev/null"
 199                                         pgstatus "$pgdir"
 200                                 if [ "$PG_STATUS" = "running" ]; then
 201                                         ok
 202                                 else
 203                                         fail
 204                                 fi
 205                         else
 206                                 # postgresql died and pg_ctl has misinformed us about
 207                                 # the status; remove pid file and start it again
 208                                 deltext; died
 209                                 rm -f $pgdir/postmaster.pid
 210                                 pgstart "$pgdir"
 211                         fi
 212                 fi
 213         done
 214         pgsubsys
 215         ;;
 216   init)
 217         nls "Note: this is only simple init action for convenience."
 218         nls "If you want some non-standard options, consider using initdb(1)."
 219         echo
 220         for pgdir in $DB_CLUSTERS; do
 221                 if [ -f $pgdir/PG_VERSION ]; then
 222                         echo $(nls "Skipping existing cluster %s" "$pgdir")
 223                 else
 224                         echo $(nls "Initializing cluster %s" "$pgdir")
 225                         mkdir -p $pgdir
 226                         chmod 700 $pgdir
 227                         chown postgres:postgres $pgdir
 228                         TMPDIR=/tmp su - postgres -s /bin/sh -c "initdb -E UNICODE -D $pgdir"
 229                 fi
 230         done
 231         echo $(nls "REMEMBER to setup password for user \"postgres\"")'!'
 232         ;;
 233   *)
 234         msg_usage "$0 {start|stop|init|restart|reload|force-reload|status}"
 235         exit 3
 236 esac
 237
 238 exit 0