ZEO-Cluster automatisch starten

Das Skript /srv/myproject/zeo kann z.B. so aussehen:

#!/bin/sh
# /etc/rc.d/init.d/zeo
# Startup script for a ZEOCluster
#
# chkconfig: 345 80 20
# description: Zope, a scalable web application server
#
# config: /srv/myproject/deploy.cfg
#
# LSB Source function library
. /lib/lsb/init-functions

RETVAL=0
# list zeo clients in the list below
zeoclients="instance"
# this is for the default install path
clusterpath="/srv/myproject"
prog="ZEOCluster"

start() {
    echo -n $"Starting $prog: "
    output=`${clusterpath}/bin/zeoserver start`
    # the return status of the zeoserver is not reliable, we need to parse
    # its output via substring match
    if echo $output | grep -q "start"; then
            # success
            touch /var/lock/zope/$prog
            log_success_msg "zeoserver started successfully"
            echo
            RETVAL=0
    else
            # failed
            log_failure_msg "zeo failed to start or was already started"
            echo
            RETVAL=1
    fi
    for client in $zeoclients
        do
            echo -n $"Starting $client: "
            output=`${clusterpath}/bin/${client} start`
            # the return status of the instance is not reliable, we need to parse
            # its output via substring match
            if echo $output | grep -q "start"; then
                # success
                touch /var/lock/zope/${client}
                log_success_msg "$client started successfully"
                echo
                RETVAL=0
            else
                # failed
                log_failure_msg "$client failed to start or was already started"
                echo
                RETVAL=1
            fi
        done
        return $RETVAL
}

stop() {

for client in $zeoclients
    do
       echo -n $"Stopping $client: "
       output=`${clusterpath}/bin/${client} stop`
       # the return status of the instance is not reliable, we need to parse
        # its output via substring match
        if echo $output | grep -q "stop"; then
            # success
            rm /var/lock/zope/${client}
            log_success_msg "$client stopped successfully"
            echo
            RETVAL=0
        else
            # failed
            log_failure_msg "$client failed to stop or was already stopped"
            echo
            RETVAL=1
        fi
    done
    echo -n $"Stopping $prog: "
    output=`${clusterpath}/bin/zeoserver stop`
    # the return status of the instance is not reliable, we need to parse
    # its output via substring match
    if echo $output | grep -q "stop"; then
            # success
            rm /var/lock/zope/$prog
            log_success_msg "zeoserver stopped successfully"
            echo
            RETVAL=0
    else
            # failed
            log_failure_msg "zeoserver failed to stop or was already stopped"
            echo
            RETVAL=1
    fi
        return $RETVAL
}

restart() {
   stop
   start
}

case "$1" in
  start)
    start
    ;;
  stop)
    stop
    ;;
  status)
        echo "ZEO Server:"
        output=`${clusterpath}/bin/zeoserver status`
        echo $output
        for client in $zeoclients
        do
                echo "Zope Client" $client
                output=`${clusterpath}/bin/${client} status`
                echo $output
        done
        ;;
  restart)
    restart
    ;;
  condrestart)
    [ -e /var/lock/zope/$prog ] && restart
    ;;
  *)
    echo $"Usage: $0 {start|stop|status|restart|condrestart}"
    RETVAL=2
esac

exit $RETVAL

Dabei enthält das Skript folgende Optionen:

• start
• stop
• status
• restart
• condrestart

Anmerkung 1: Da der effective-user auf zope gesetzt wurde (s.a. Buildout für Produktivserver) sollte der Nutzer zope nun selbstverständlich in /var/lock/zope/ schreiben dürfen.

Anmerkung 2: Gegebenenfalls sollte auch die Environment-Variable für den PYTHON_EGG_CACHE in der deploy.cfg-Datei festgelegt werden:

[instance1]
…
environment-vars =
    PYTHON_EGG_CACHE = /home/zope/.python-eggs

$ cd /etc/init.d
$ sudo ln -s /srv/myproject/zeo .
$ sudo /etc/init.d/zeo start

$ sudo chkconfig --level 345 zeo off

[buildout]
…
parts =
    …
    reboot

[reboot]
recipe = z3c.recipe.usercrontab
times = @reboot
command = ${buildout:directory}/zeo start

$ svn propset svn:executable ON zeo