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 PG_INIT_LOCALE=C
  22
  23 # Get service config
  24 if [ -f /etc/sysconfig/postgresql ]; then
  25         . /etc/sysconfig/postgresql
  26 else
  27         nls "Error: %s not found" /etc/sysconfig/postgresql
  28         nls " PostgreSQL can't be run."
  29         exit 1
  30 fi
  31
  32 if [ ! "$PG_DB_CLUSTERS" ]; then
  33         nls "Error: PG_DB_CLUSTERS not found or is empty"
  34         nls " PostgreSQL can't be run."
  35         exit 1
  36 fi
  37
  38 # Check that networking is up.
  39 if is_yes "${NETWORKING}"; then
  40         if [ ! -f /var/lock/subsys/network -a "$1" != stop -a "$1" != status -a "$1" != init ]; then
  41                 msg_network_down PostgreSQL
  42                 exit 1
  43         fi
  44 else
  45         exit 0
  46 fi
  47
  48 action="$1"
  49
  50 # any db cluster as command line argument?
  51 if [ $# -gt 1 ]; then
  52         shift
  53         # perform action for specified clusters only
  54         DB_CLUSTERS="$@"
  55 else
  56         DB_CLUSTERS="$PG_DB_CLUSTERS"
  57 fi
  58
  59 #
  60 # Useful functions.
  61 #
  62
  63 #
  64 # check for postgresql status
  65 #
  66 # arguments:
  67 # $1 - db cluster
  68 #
  69 # sets variables:
  70 # PG_STATUS = running | not running
  71 # PG_PID    = pid of postmaster process
  72 #
  73 pgstatus() {
  74         PG_STATUS="unknown"
  75         PG_PID="unknown"
  76         output=$(LC_ALL=C TMPDIR=/tmp su postgres -c "/usr/bin/pg_ctl -D $1 status")
  77         status=$?
  78
  79         if [ $status -eq 1 ]; then
  80                 PG_STATUS="not running"
  81         elif [ $status -eq 0 ]; then
  82                 PG_STATUS="running"
  83         # or maybe grab it from postmaster.pid file?
  84                 PG_PID=$(echo "$output" | awk '/PID: / { match($0, "PID: [0-9]+"); print substr($0,RSTART+5,RLENGTH-5) }')
  85         fi
  86 }
  87
  88 #
  89 # start postgresql and display appropriate messages
  90 #
  91 # arguments:
  92 # $1 - db cluster
  93 #
  94 pgstart() {
  95         is_no "$RC_LOGGING" && fork=--fork
  96         msg_starting "PostgreSQL $1"
  97         daemon $fork --user postgres /usr/bin/pg_ctl -s -w -D $1 start
  98 }
  99
 100 #
 101 # check for running postgresql instances; if any instance is running then
 102 # create subsys lock file
 103 #
 104 pgsubsys() {
 105         # check for every defined db cluster in sysconfig file
 106         for pgdir in $PG_DB_CLUSTERS; do
 107                 pgstatus "$pgdir"
 108                 if [ "$PG_STATUS" = "running" ]; then
 109                         touch /var/lock/subsys/postgresql
 110                         return
 111                 fi
 112         done
 113         rm -f /var/lock/subsys/postgresql
 114 }
 115
 116 #
 117 # End of useful functions.
 118 #
 119
 120 start() {
 121         for pgdir in $DB_CLUSTERS; do
 122                 pgstatus "$pgdir"
 123                 if [ "$PG_STATUS" = "running" ]; then
 124                         # pg_ctl status can misinform us about postgresql status
 125                         # so let's check if postmaster is really alive
 126                         if ps -p "$PG_PID" >/dev/null; then
 127                                 msg_already_running "PostgreSQL $pgdir"
 128                         else
 129                                 # pg_ctl has misinformed us about postgresql status;
 130                                 # remove pid file and run postgresql
 131                                 msg_not_running "PostgreSQL $pgdir"
 132                                 rm -f $pgdir/postmaster.pid
 133                                 pgstart "$pgdir"
 134                         fi
 135                 else
 136                         pgstart "$pgdir"
 137                 fi
 138         done
 139         pgsubsys
 140 }
 141
 142 stop() {
 143         for pgdir in $DB_CLUSTERS; do
 144                 pgstatus "$pgdir"
 145                 if [ "$PG_STATUS" = "not running" ]; then
 146                         msg_not_running "PostgreSQL $pgdir"
 147                 else
 148                         msg_stopping "PostgreSQL $pgdir"
 149                         busy
 150                         # is postgresql really alive?
 151                         if ps -p "$PG_PID" >/dev/null; then
 152                                 TMPDIR=/tmp su postgres -c "/usr/bin/pg_ctl -w -D $pgdir stop -m fast 2>&1 >/dev/null"
 153                                 pgstatus "$pgdir"
 154                                 if [ "$PG_STATUS" != "not running" ]; then
 155                                         fail
 156                                 else
 157                                         ok
 158                                 fi
 159                         else
 160                                 # postgresql is not really alive; pg_ctl misinformed us
 161                                 # about the status
 162                                 died
 163                         fi
 164                         rm -f $pgdir/postmaster.pid
 165                 fi
 166         done
 167         pgsubsys
 168 }
 169
 170 RETVAL=0
 171 # See how we were called.
 172 # Every action is performed for all given (all configured by default)
 173 # db clusters.
 174 case "$action" in
 175   start)
 176         start
 177         ;;
 178   stop)
 179         stop
 180         ;;
 181   status)
 182         for pgdir in $DB_CLUSTERS; do
 183                 pgstatus "$pgdir"
 184                 if [ "$PG_STATUS" = "running" ]; then
 185                         show "PostgreSQL cluster %s, PID %s" "$pgdir" "$PG_PID"
 186                         progress "$PG_STATUS"
 187                 else
 188                         show "PostgreSQL cluster %s" "$pgdir"
 189                         progress "$PG_STATUS" "$CFAIL"
 190                 fi
 191                 echo
 192         done
 193         ;;
 194   restart)
 195         stop
 196         start
 197         ;;
 198   reload|force-reload|try-restart)
 199         if [ "$action" = "reload" ]; then
 200                 # "reload" must not restart service - so let it reload only what's possible
 201                 pgctlact="reload"
 202         else
 203                 pgctlact="restart"
 204         fi
 205         for pgdir in $DB_CLUSTERS; do
 206                 pgstatus "$pgdir"
 207                 if [ "$PG_STATUS" = "not running" ]; then
 208                         msg_not_running "PostgreSQL $pgdir"
 209                         if [ "$action" != "try-restart" ]; then
 210                                 RETVAL=7
 211                         fi
 212                 else
 213                         msg_reloading "PostgreSQL $pgdir"
 214                         busy
 215                         # is postgresql really alive?
 216                         if ps -p "$PG_PID" >/dev/null; then
 217                                 TMPDIR=/tmp su postgres -c "/usr/bin/pg_ctl -D $pgdir $pgctlact 2>&1 >/dev/null"
 218                                         pgstatus "$pgdir"
 219                                 if [ "$PG_STATUS" = "running" ]; then
 220                                         ok
 221                                 else
 222                                         fail
 223                                 fi
 224                         elif [ "$action" != "try-restart" ]; then
 225                                 # postgresql died and pg_ctl has misinformed us about
 226                                 # the status - i.e. service is actually not running
 227                                 RETVAL=7
 228                         else
 229                                 # postgresql died and pg_ctl has misinformed us about
 230                                 # the status; remove pid file and start it again
 231                                 deltext; died
 232                                 rm -f $pgdir/postmaster.pid
 233                                 pgstart "$pgdir"
 234                         fi
 235                 fi
 236         done
 237         pgsubsys
 238         ;;
 239   init)
 240         nls "Note: this is only simple init action for convenience."
 241         nls "If you want some non-standard options, consider using initdb(1)."
 242         echo
 243         for pgdir in $DB_CLUSTERS; do
 244                 if [ -f $pgdir/PG_VERSION ]; then
 245                         echo $(nls "Skipping existing cluster %s" "$pgdir")
 246                 else
 247                         echo $(nls "Initializing cluster %s" "$pgdir")
 248                         mkdir -p $pgdir
 249                         chmod 700 $pgdir
 250                         chown postgres:postgres $pgdir
 251                         LC_ALL=$PG_INIT_LOCALE TMPDIR=/tmp su postgres -s /bin/sh -c "initdb -E UNICODE -D $pgdir"
 252                 fi
 253         done
 254         echo $(nls "REMEMBER to setup password for user \"postgres\"")'!'
 255         ;;
 256   *)
 257         msg_usage "$0 {start|stop|init|restart|reload|force-reload|status}"
 258         exit 3
 259 esac
 260
 261 exit $RETVAL