Script de inicialização do PostgreSQL 8 com suporte a acesso remoto - Fedora 7

Publicado por Rodrigo Padula de Oliveira 09/07/2007

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Homepage: http://www.rodrigopadula.com

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Script de inicialização do PostgreSQL com modificação para suporte a acesso remoto.

Testado em Fedora 7 e PostgreSQL 8.1.8

Este script é instalado no caminho /etc/init.d durante a instalação dos pacotes RPM do postgresql no Fedora.

  



Esconder código-fonte

#!/bin/sh
# postgresql    This is the init script for starting up the PostgreSQL
#               server
#
# chkconfig: - 64 36
# description: Starts and stops the PostgreSQL backend daemon that handles \
#              all database requests.
# processname: postmaster
# pidfile: /var/run/postmaster.pid

# Version 6.5.3-2 Lamar Owen
# Added code to determine if PGDATA exists, whether it is current version
#     or not, and initdb if no PGDATA (initdb will not overwrite a database).

# Version 7.0 Lamar Owen
# Added logging code
# Changed PGDATA.

# Version 7.0.2 Trond Eivind Glomsrd <teg@redhat.com>
# use functions, add conditional restart

# Version 7.0.3 Lamar Owen <lamar@postgresql.org>
# Check for the existence of functions before blindly using them
# in particular -- check for success () and failure () before using.
# More Cross-distribution support -- PGVERSION variable, and docdir checks.

# Version 7.1 Release Candidate Lamar Owen <lamar@postgresql.org>
# initdb parameters have changed.

# Version 7.1.2 Trond Eivind Glomsrd <teg@redhat.com>
# Specify shell for su
# Handle stop better - kill unwanted output, make it wait until the database is ready
# Handle locales slightly differently - always using "C" isn't a valid option
# Kill output from database initialization
# Mark messages for translation

# Version 7.1.2-2.PGDG Lamar Owen <lamar.owen@wgcr.org>
# sync up.
# Karl's fixes for some quoting issues.

# Version 7.2b2 Lamar Owen <lamar.owen@wgcr.org>
# version change.

# Version 7.2 final.  Lamar Owen <lamar.owen@wgcr.org>
# reload from Peter E.
# Eliminate the pidof postmaster test in stop -- we're using pg_ctl so we don't need pidof.
# Tested the $? return for the stop script -- it does in fact propagate.
# TODO: multiple postmasters.

# Version 7.3 Lamar Owen <lamar.owen@ramifordistat.net>
# Multiple postmasters, courtesy Karl DeBisschop
# Version 7.4 Lamar Owen.

# Version 7.4.3 Tom Lane <tgl@sss.pgh.pa.us>
# Support condstop for uninstall
# Minor other changes suggested by Fernando Nasser.

# Version 7.4.5 Tom Lane <tgl@sss.pgh.pa.us>
# Rewrite to start postmaster directly, rather than via pg_ctl; this avoids
# fooling the postmaster's stale-lockfile check by having too many
# postgres-owned processes laying about.


# PGVERSION is the full package version, e.g., 7.4.7
# Note: the specfile ordinarily updates this during install
PGVERSION=8.1.8
# PGMAJORVERSION is major version, e.g., 7.4 (this should match PG_VERSION)
PGMAJORVERSION=`echo "$PGVERSION" | sed 's/^\([0-9]*\.[0-9]*\).*$/\1/'`

# Source function library.
. /etc/rc.d/init.d/functions

# Get function listing for cross-distribution logic.
TYPESET=`typeset -f|grep "declare"`

# Get 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
PGDATA=/var/lib/pgsql
if [ -f "$PGDATA/PG_VERSION" ] && [ -d "$PGDATA/base/template1" ]
then
        echo "Using old-style directory structure"
else
        PGDATA=/var/lib/pgsql/data
fi
PGLOG=/var/lib/pgsql/pgstartup.log

# Override defaults from /etc/sysconfig/pgsql if file is present
[ -f /etc/sysconfig/pgsql/${NAME} ] && . /etc/sysconfig/pgsql/${NAME}

export PGDATA
export PGPORT

# Check that networking is up.
# Pretty much need it for postmaster.
[ "${NETWORKING}" = "no" ] && exit 1

[ -f "$PGENGINE/postmaster" ] || exit 1

script_result=0

start(){
        PSQL_START=$"Starting ${NAME} service: "

        # Make sure startup-time log file is valid
        if [ ! -e "$PGLOG" -a ! -h "$PGLOG" ]
        then
                touch "$PGLOG" || exit 1
                chown postgres:postgres "$PGLOG"
                chmod go-rwx "$PGLOG"
                [ -x /usr/bin/chcon ] && /usr/bin/chcon -u system_u -r object_r -t postgresql_log_t "$PGLOG" 2>/dev/null
        fi

        # Check for the PGDATA structure
        if [ -f "$PGDATA/PG_VERSION" ] && [ -d "$PGDATA/base" ]
        then
        # Check version of existing PGDATA

                if [ x`cat "$PGDATA/PG_VERSION"` != x"$PGMAJORVERSION" ]
                then
                        SYSDOCDIR="(Your System's documentation directory)"
                        if [ -d "/usr/doc/postgresql-$PGVERSION" ]
                        then
                                SYSDOCDIR=/usr/doc
                        fi
                        if [ -d "/usr/share/doc/postgresql-$PGVERSION" ]
                        then
                                SYSDOCDIR=/usr/share/doc
                        fi
                        if [ -d "/usr/doc/packages/postgresql-$PGVERSION" ]
                        then
                                SYSDOCDIR=/usr/doc/packages
                        fi
                        if [ -d "/usr/share/doc/packages/postgresql-$PGVERSION" ]
                        then
                                SYSDOCDIR=/usr/share/doc/packages
                        fi
                        echo
                        echo $"An old version of the database format was found."
                        echo $"You need to upgrade the data format before using PostgreSQL."
                        echo $"See $SYSDOCDIR/postgresql-$PGVERSION/README.rpm-dist for more information."
                        exit 1
                fi

        # No existing PGDATA! Initdb it.

        else
                echo -n $"Initializing database: "
                if [ ! -e "$PGDATA" -a ! -h "$PGDATA" ]
                then
                        mkdir -p "$PGDATA" || exit 1
                        chown postgres:postgres "$PGDATA"
                        chmod go-rwx "$PGDATA"
                fi
                # Clean up SELinux tagging for PGDATA
                [ -x /sbin/restorecon ] && /sbin/restorecon "$PGDATA"
                # Initialize the database
                $SU -l postgres -c "$PGENGINE/initdb --pgdata='$PGDATA' --auth='ident sameuser'" >> "$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"

                [ -f "$PGDATA/PG_VERSION" ] && echo_success
                [ ! -f "$PGDATA/PG_VERSION" ] && echo_failure
                echo
        fi

        echo -n "$PSQL_START"
        $SU -l postgres -c "$PGENGINE/postmaster -i -p '$PGPORT' -D '$PGDATA' ${PGOPTS} &" >> "$PGLOG" 2>&1 < /dev/null
        sleep 2
        pid=`pidof -s "$PGENGINE/postmaster"`
        if [ $pid ] && [ -f "$PGDATA/postmaster.pid" ]
        then
                success "$PSQL_START"
                touch /var/lock/subsys/${NAME}
                head -n 1 "$PGDATA/postmaster.pid" > "/var/run/postmaster.${PGPORT}.pid"
                echo
        else
                failure "$PSQL_START"
                echo
                script_result=1
        fi
}
stop(){
        echo -n $"Stopping ${NAME} service: "
        $SU -l postgres -c "$PGENGINE/pg_ctl stop -D '$PGDATA' -s -m fast" > /dev/null 2>&1 < /dev/null
        ret=$?
        if [ $ret -eq 0 ]
        then
                echo_success
        else
                echo_failure
                script_result=1
        fi
        echo
        rm -f "/var/run/postmaster.${PGPORT}.pid"
        rm -f "/var/lock/subsys/${NAME}"
}

restart(){
    stop
    start
}

condrestart(){
    [ -e /var/lock/subsys/${NAME} ] && restart
}

condstop(){
    [ -e /var/lock/subsys/${NAME} ] && stop
}

reload(){
    $SU -l postgres -c "$PGENGINE/pg_ctl reload -D '$PGDATA' -s" > /dev/null 2>&1 < /dev/null
}

# This script is slightly unusual in that the name of the daemon (postmaster)
# is not the same as the name of the subsystem (postgresql)

# See how we were called.
case "$1" in
  start)
        start
        ;;
  stop)
        stop
        ;;
  status)
        status postmaster
        script_result=$?
        ;;
  restart)
        restart
        ;;
        ;;
  condrestart)
        condrestart
        ;;
  condstop)
        condstop
        ;;
  reload|force-reload)
        reload
        ;;
  *)
        echo $"Usage: $0 {start|stop|status|restart|condrestart|condstop|reload|force-reload}"
        exit 1
esac

exit $script_result

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