Gnbd-servidor

Este demonio RedHat/CentOS exporta las particiones definidas para GNBD.

gnbd-servidor

#!/bin/bash
#
#
#
# chkconfig: 345 23 77
# description: export/import/whatever the gnbd block devices configured in /etc/gnbdtab
#
#
### BEGIN INIT INFO
# Provides:
### END INIT INFO

. /etc/init.d/functions

GNBD_SRV_TIMEOUT=5

start() {
        local GNBD

        if [ ! -f /etc/gnbdtab ] ; then
                echo "Please create /etc/gnbdtab"
                echo "Sample conf: /etc/gnbdtab"
                failure "Falta crear el archivo"
                echo
                return 1
        fi

        echo "Loading needed kernel modules for gnbd"
        modprobe gnbd
        rtrn=$?
        if [ $rtrn -ne 0 ]; then
                failure "Failed to load needed kernel modules for gnbd"
                echo
                return 1
        fi

        echo "Starting gnbd_serv"
        /sbin/gnbd_serv -q
        rtrn=$?
        if [ $rtrn -ne 0 ]; then
                failure "Failed to start gnbd_serv"
                echo
                return 1
        fi

        GNBD=`cat /etc/gnbdtab | egrep '^export'`
        if [ -n "$GNBD" ] ; then
                awk '/^export/ { print "--> device:", $4, "as", $3 }' /etc/gnbdtab
                cat /etc/gnbdtab | awk '/^export/ { print "-d", $4, "-e", $3 }'| xargs -l gnbd_export ${GNBD_SRV_OPTS} > /dev/null
                rtrn=$?
                if [ $rtrn -ne 0 ]; then
                        failure "Failed to export gnbd devices"
                        echo
                        return 1
                fi
        fi
        success "Iniciado"
        echo
        return 0
}

stop() {

        local GNBD_SRV_PROCS GNBD_CLUSTERD_PROC

        echo "Unexporting all GNBDs devices"
        gnbd_export -q -R &> /dev/null
        rtrn=$?
        if [ $rtrn -ne 0 ]; then
                failure "Failed to unexport all gnbd devices"
                echo
                return 1
        fi

        GNBD_SRV_PROCS="$(pgrep gnbd_serv)"
        while [ -n "${GNBD_SRV_PROCS}" ] && [ ${GNBD_SRV_TIMEOUT} -gt 0 ] ; do
                gnbd_serv -k &> /dev/null
                sleep 1
                GNBD_SRV_TIMEOUT=$(( ${GNBD_SRV_TIMEOUT}-1 ))
                GNBD_SRV_PROCS="$(pgrep gnbd_serv)"
        done

        if [ -n "${GNBD_SRV_PROCS}" ]; then
                gnbd_serv -K &> /dev/null
        fi
        rtrn=$?
        if [ $rtrn -ne 0 ]; then
                failure "Failed to stop gnbd_serv"
                echo
                return 1
        fi

        GNBD_CLUSTERD_PROC="$(pgrep gnbd_clusterd)"
        if [ -n "${GNBD_CLUSTERD_PROC}" ]; then
                echo "Stopping gnbd_clusterd"
                killall gnbd_clusterd &> /dev/null
                rtrn=$?
                if [ $rtrn -ne 0 ]; then
                        echo "Failed to stop gnbd_clusterd"
                fi
        fi

        echo "Unloading gnbd kernel module"
        modprobe -r gnbd
        rtrn=$?
        if [ $rtrn -ne 0 ]; then
                failure "Failed to unload gnbd kernel module"
                echo
                return 1
        fi
        success "Finalizado"
        echo
        return 0
}

status() {
        gnbd_export -l
        rtrn=$?
        if [ $rtrn -ne 0 ]; then
                echo "No hay exportados"
                return $rtrn
        fi
        return 0
}

case "$1" in
  start)
        start
        rtrn=$?
        ;;
  stop)
        stop
        rtrn=$?
        ;;
  status)
        status
        rtrn=$?
        ;;
  restart)
        stop
        start
        rtrn=$?
        ;;
  *)
        echo $"Usage: $0 {start|stop|restart|status}"
        ;;
esac

exit $rtrn