196 lines
4 KiB
Bash
196 lines
4 KiB
Bash
#!/bin/bash
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#
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# consul Manage the consul agent
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#
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# chkconfig: 2345 95 95
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# description: Consul is a tool for service discovery and configuration
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# processname: consul
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# config: /etc/consul.conf
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# pidfile: /var/run/consul.pid
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### BEGIN INIT INFO
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# Provides: consul
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# Required-Start: $local_fs $network
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# Required-Stop:
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# Should-Start:
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# Should-Stop:
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# Default-Start: 2 3 4 5
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# Default-Stop: 0 1 6
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# Short-Description: Manage the consul agent
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# Description: Consul is a tool for service discovery and configuration
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### END INIT INFO
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# source function library
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. /etc/rc.d/init.d/functions
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prog="consul"
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exec="/usr/local/bin/$prog"
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pidfile="/var/run/$prog.pid"
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lockfile="/var/lock/subsys/$prog"
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logfile="/var/log/$prog"
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confdir="/etc/consul.d"
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# pull in sysconfig settings
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[ -e /etc/sysconfig/$prog ] && . /etc/sysconfig/$prog
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user=${CONSUL_USER:-consul}
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group=${CONSUL_GROUP:-consul}
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export GOMAXPROCS=${GOMAXPROCS:-2}
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start() {
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[ -x $exec ] || exit 5
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[ -d $confdir ] || exit 6
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umask 077
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touch $logfile $pidfile
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chown "$user:$group" $logfile $pidfile
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echo -n $"Starting $prog: "
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## holy shell shenanigans, batman!
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## daemon can't be backgrounded. we need the pid of the spawned process,
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## which is actually done via runuser thanks to --user.
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## you can't do "cmd &; action" but you can do "{cmd &}; action".
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## consul 0.2.1 added -pid-file; although the following creates $pidfile
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## owned by consul:consul, using -pid-file results in a permission error.
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daemon \
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--pidfile=$pidfile \
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--user="$user" \
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" { $exec agent -config-dir=$confdir &>> $logfile & } ; echo \$! >| $pidfile "
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RETVAL=$?
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echo
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[ $RETVAL -eq 0 ] && touch $lockfile
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echo -n $"Waiting for Consul ready: "
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## wait up to 60s for the rpc port to become listened-upon
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## consul 0.2.1 got much slower to start!
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count=0
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ready=0
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pid=$( cat ${pidfile} )
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while checkpid ${pid} && [ $count -lt 60 ] && [ $ready -ne 1 ]; do
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count=$(( count + 1 ))
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if netstat -lptn | egrep -q ":8400.*LISTEN +${pid}/" ; then
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ready=1
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else
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sleep 1
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fi
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done
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if [ $ready -eq 1 ]; then
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RETVAL=0
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success
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else
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RETVAL=1
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failure
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fi
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echo
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return $RETVAL
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}
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stop() {
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echo -n $"Shutting down $prog: "
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## graceful shutdown with leave
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$exec leave &> /dev/null
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RETVAL=$?
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## wait up to 10s for the daemon to exit
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if [ $RETVAL -eq 0 ]; then
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count=0
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stopped=0
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pid=$( cat ${pidfile} )
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while [ $count -lt 10 ] && [ $stopped -ne 1 ]; do
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count=$(( count + 1 ))
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if ! checkpid ${pid} ; then
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stopped=1
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else
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sleep 1
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fi
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done
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if [ $stopped -ne 1 ]; then
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RETVAL=125
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fi
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fi
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if [ $RETVAL -eq 0 ]; then
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success
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rm -f $lockfile $pidfile
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else
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failure
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fi
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echo
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return $RETVAL
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}
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restart() {
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stop
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start
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}
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reload() {
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echo -n $"Reloading $prog: "
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killproc -p $pidfile $exec -HUP
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echo
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}
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force_reload() {
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restart
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}
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rh_status() {
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status -p "$pidfile" -l $prog $exec
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RETVAL=$?
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[ $RETVAL -eq 0 ] && $exec members
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return $RETVAL
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}
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rh_status_q() {
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rh_status >/dev/null 2>&1
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}
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case "$1" in
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start)
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rh_status_q && exit 0
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$1
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;;
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stop)
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rh_status_q || exit 0
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$1
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;;
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restart)
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$1
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;;
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reload)
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rh_status_q || exit 7
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$1
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;;
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force-reload)
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force_reload
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;;
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status)
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rh_status
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;;
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condrestart|try-restart)
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rh_status_q || exit 0
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restart
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;;
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*)
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echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}"
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exit 2
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esac
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exit $?
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