running n2n-EdgeNode as a service¶
running n2n-EdgeNode as a service¶
if everything is working as expected we maybe want n2n-edgenode to survive a system-reboot.
The following should work without modification:
Create a folder /etc/n2n and create configuration files (as described below) using following file name format:
mkdir /etc/n2n
edge-host1.example.com edge-host2.example.com edge-*.example.com
The interesting contents of 'edge-host1.example.com' would look similar to this（默认）:
vim /etc/n2n/edge-host1.example.com
# == edge configuration values parsed by /etc/rc.d/init.d/edged == # Each value is read by the init script - do not modify variable names. # Read 'man edge' for details about these values... # Uncomment N2N_FORWARD if you want to route packets via VPN... # N2N_FORWARD="-r" # N2N_DAEMONISE="-f" N2N_TUN_IF="tun10" N2N_IP="10.10.10.11" N2N_NETMASK="255.255.255.0" N2N_KEY="MySecretCode" N2N_COMMUNITY="MyCommunityName" # Better to use numeric public IP rather than DNS hostname, but... N2N_SUPERNODE="gw1.example.com" N2N_PORT="8765" N2N_UID="99" N2N_GID="99" # Other options... # N2N_OPTIONS="-p 1234 -M 1200 -t -b -v" N2N_OPTIONS="" # === end edge-host1.example.com config. file ===================
Read comments in the scripts below to make more sense out of how they work.
Here is the init-script that works when used with configuration files as described above:
vim /etc/init.d/edged
#!/bin/sh
# $Id: n2n-edge.init,v 1.9 2009/10/23 12:34:56
# n2n edge startup script.
#
# chkconfig: 345 97 25
# processname: edge
# pidfile: /var/run/n2n-edge.pid
#
# short-description: Provides client-to-client VPN access via Internet
# description: This is startup script for n2n 'edge',
# n2n edge + supernode provide internet connection for vpn peers
#
# SEE:
# for more options n2n 'man edge' and 'man supernode'
#
# NOTE:
# Option to enter 'debug' as second var: e.g 'supernode start debug'
# Using grep -w switch searches for whole word reduces ambiguity
# Comment in/out the 'echo' stuff depending if things work as expected
# Config files located/named in: /etc/n2n/edge-your.example.com
# Assumes CentOS init scripts located in /etc/rc.d/init.d/
#
# Created: FOOFORCE RB 2009-10-24
# License GPL: free to copy, improve and use.
# ===========================================================
# ==== main init script variables ===========================
# Make sure you include path where 'edge' + sh + tools are installed..
# PATH="/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin"
PATH="/sbin:/bin:/usr/sbin:/usr/bin"
# The name + path to the executable program/daemon file...
NAME="edge"
DAEMON="/usr/sbin/${NAME}"
# Modify $NAME to filter on 'grep -w [s]supernode' - faster than 'grep -v grep'...
GREPNAME=$(echo "[e]${NAME#e}")
# Enable some simple debug messages when running this script...
if [[ "${2}" == "debug" ]]; then
echo "DEBUG: ${GREPNAME} ${2}"
fi
PIDFILE="/var/run/edge.pid"
LOGFILE="/var/log/n2n-${NAME}.log"
STAMP=$(/bin/date +%T)
# Get the host/domain name to identify local configfile..
HOST=$(/bin/hostname)
FQDN=$(/bin/hostname -f)
# Initialise configfile variable to empty value...
CONFIGDIR="/etc/n2n"
# Initialise configfile variable to empty value...
CONFIGFILE=""
# Load values from configfile using our local domain name:
# Example:
# Our local FQDN = 'myhost.example.com'
# Our configfile = 'edge-myhost.example.com'
#
if [[ "${HOST}" == "" ]]; then
#if [[ "${FQDN}" == "" ]]; then
#echo " ERROR: Missing ${FQDN} hostname in config file /etc/rc.d/init.d/${NAME}"
echo " ERROR: Missing ${HOST} hostname in config file /etc/rc.d/init.d/${NAME}"
exit 1
else
#CONFIGFILE="${CONFIGDIR}/edge-${FQDN}"
CONFIGFILE="${CONFIGDIR}/edge-${HOST}"
fi
if [[ -f "${CONFIGFILE}" ]]; then
# Get values from local configuration file...
echo " Found config file: ${CONFIGFILE}"
. ${CONFIGFILE}
else
echo "ERROR: Missing config file ${CONFIGFILE}"
exit 1
fi
# See if pid file exists and get pid number...
if [[ -f "${PIDFILE}" ]]; then
CURPID=$(cat ${PIDFILE})
fi
# Quit if we can't find application...
test -f ${DAEMON} || exit 0
set -e
# Set any value to enable this script...
# N2N_RUN=1
#
# test -n "${N2N_RUN}" || exit 0
# Optionaly change into n2n config directory...
if [[ -d "${CONFIGDIR}" ]]; then
cd ${CONFIGDIR}
fi
# =========================================================
# Should not need to change much below here...
# ==== see how we were called + act accordingly ==========
case "${1}" in
start)
# echo " ${NAME} ${1} process is ${0} on pid: ${$})..."
echo "${STAMP} start n2n /etc/rc.d/init.d/${NAME}" > ${LOGFILE}
if [[ -n "${CURPID}" ]]; then
echo " A PID:${CURPID} already exists for ${0}:"
echo " To re-start with current config settings, run '$0 stop' then '$0 start' ..."
else
if [ -d /var/lock/subsys ] ; then
touch /var/lock/subsys/${NAME};
fi
# =====================================================
# If using third-part tools to set tun device..
# tunctl -t ${N2N_TUN_IF}
# All variables read from ${CONFIGFILE}...
# Use configfile ${FORWARD} = '-r' switch to enable packet forwarding/routing
# Use configfile ${DAEMONISE} = '-f' switch to daemonise in background....
#
# Uncomment to display all the variable source values...
# echo "DEBUG: ${DAEMON} ${FORWARD} ${N2N_DAEMONISE}\
# -d ${N2N_TUN_IF} -c ${N2N_COMMUNITY} -k ${N2N_KEY} -u ${N2N_UID} -g ${N2N_GID} \
# -a ${N2N_IP} -s ${N2N_NETMASK} -p ${N2N_UDP} -l ${N2N_SUPERNODE}:${N2N_PORT} ${N2N_OPTIONS}"
# If variable value not empty then add command-line switch to variable...
if [[ -n "${N2N_TUN_IF}" ]]; then N2N_TUN_IF="-d ${N2N_TUN_IF}"; fi
if [[ -n "${N2N_IP}" ]]; then N2N_IP="-a ${N2N_IP}"; fi
if [[ -n "${N2N_NETMASK}" ]]; then N2N_NETMASK="-s ${N2N_NETMASK}"; fi
if [[ -n "${N2N_COMMUNITY}" ]]; then N2N_COMMUNITY="-c ${N2N_COMMUNITY}"; fi
if [[ -n "${N2N_KEY}" ]]; then N2N_KEY="-k ${N2N_KEY}"; fi
if [[ -n "${N2N_UID}" ]]; then N2N_UID="-u ${N2N_UID}"; fi
if [[ -n "${N2N_GID}" ]]; then N2N_GID="-g ${N2N_GID}"; fi
if [[ -n "${N2N_SUPERNODE}" ]]; then N2N_SUPERNODE="-l ${N2N_SUPERNODE}"; fi
if [[ -n "${N2N_PORT}" ]]; then N2N_PORT=":${N2N_PORT}"; fi
if [[ "${2}" == "debug" ]]; then
echo "DEBUG: display values for ${DAEMON} from configfile:"
echo " ${FORWARD} ${N2N_DAEMONISE} ${N2N_TUN_IF} ${N2N_IP} ${N2N_NETMASK} ${N2N_COMMUNITY}"
echo " ${N2N_KEY} ${N2N_UID} ${N2N_GID} ${N2N_SUPERNODE}${N2N_PORT} ${N2N_OPTIONS}"
fi
# Execute the command + switches + values sources from config file...
${DAEMON} ${FORWARD} ${N2N_DAEMONISE} ${N2N_TUN_IF} ${N2N_IP} ${N2N_NETMASK} ${N2N_COMMUNITY} \
${N2N_KEY} ${N2N_UID} ${N2N_GID} ${N2N_SUPERNODE}${N2N_PORT} ${N2N_OPTIONS}
# ====================================================
echo " NOTICE: Starting:${NAME}"
rm -f ${PIDFILE}
touch ${PIDFILE}
for PID in $(ps ax | grep -w "${GREPNAME}" | grep -v "(restart|stop|start)" | awk '{ print $1 }')
do
echo " Setting PID: ${PID}"
echo ${PID} >> ${PIDFILE}
done
fi
;;
stop)
# echo " DEBUG: Searching for at least one live process id..."
PID=$(ps ax | grep -w "${GREPNAME}" | grep -v "(restart|stop|start)" | awk '{ print $1 }')
if [[ "${2}" == "debug" ]]; then
echo " ${NAME} ${1} process is ${0} on pid: ${$}) for ${PID}..."
fi
echo "${STAMP} stop /etc/rc.d/init.d/${NAME}" >> ${LOGFILE}
# echo " NOTICE: Kill name:${NAME} pid:${pid} before stopping..."
# kill -9 $(cat /var/run/${NAME}_pid) && rm /var/run/${NAME}_pid
# If a pid value found in file or in process id, then kill it...
if [[ -n "${PID}" ]]; then
echo " Stopping; ${NAME} pid:${PID}..."
# kill -9 $(cat /var/run/${NAME}.pid) && rm /var/run/${NAME}.pid
kill ${PID}
sleep 2s
rm -f ${PIDFILE}
else
# Else assume stale pid...
if [[ "${2}" == "debug" ]]; then
echo " NOTICE: No current active process ${PID}..."
fi
if [[ -f "${PIDFILE}" ]]; then
echo "removing stale pidfile..."
rm -f ${PIDFILE}
fi
fi
# Indiscriminate pid killer...
# for PID in $(ps ax | grep -w ${NAME} | grep -v grep | awk '{ print $1 }')
# do
# echo " Killing currently active ${NAME} pid(s): ${PID}"
# # kill -HUP $PID
# kill ${PID}
# done
if [[ -f /var/lock/subsys/${NAME} ]]; then
echo " Removing stale lock file..."
rm -f /var/lock/subsys/${NAME}
fi
if [[ -f "${PIDFILE}" ]]; then
echo " Removing stale pid file..."
rm -f /var/lock/subsys/${NAME}
fi
;;
restart)
echo "* Re-start ${NAME}..."
${0} stop ${2}
# Not a race....
sleep 4s
${0} start ${2}
;;
status)
# status ${NAME}
PID=$(ps ax | grep -w "${GREPNAME}" | grep -v "status" | awk '{ print $1 }')
if [[ "${2}" == "debug" ]]; then
echo " This ${NAME} ${1} init query is ${0} running on pid: ${$})..."
fi
# If at least one active session, look for more...
if [[ -n "${PID}" ]]; then
for PID in $(ps ax | grep -w "${GREPNAME}" | grep -v "status" | awk '{ print $1 }')
do
if [[ -n "${PID}" ]]; then
echo " * Found current active ${GREPNAME} pid(s): ${PID}"
else
echo " * No active session found for ${0}"
fi
done
else
echo " * No active session(s) found for ${0}"
fi
;;
*)
echo " Usage: ${0} {start|stop|status|restart|any debug}" >&2
exit 1
;;
esac
exit 0
# === end edged =============================================make init-script executeable
chmod +x /etc/init.d/edged
Using CentOS tools to activate the sys.v init scripts:
chkconfig --add edged chkconfig edged on
Command line syntax:
service edged [start|stop|restart|any debug]
For example:
service edged restart
…OR…
service edged restart debug
provides some extra clues.
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