haproxy.initd

#!/bin/sh
### BEGIN INIT INFO
# Provides:          haproxy
# Required-Start:    $local_fs $network $remote_fs
# Required-Stop:     $local_fs $remote_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: fast and reliable load balancing reverse proxy
# Description:       This file should be used to start and stop haproxy.
### END INIT INFO
 
# Author: Arnaud Cornet <[email protected]>
 
PATH=/sbin:/usr/sbin:/bin:/usr/bin
PIDFILE=/var/run/haproxy.pid
CONFIG=/etc/haproxy/haproxy.cfg
HAPROXY=/usr/local/sbin/haproxy
CONFIGTEST_LOG=/var/log/haproxy_configtest.log
EXTRAOPTS=
ENABLED=1
 
test -x $HAPROXY || exit 0
test -f "$CONFIG" || exit 0
 
if [ -e /etc/default/haproxy ]; then
    . /etc/default/haproxy
fi
 
test "$ENABLED" != "0" || exit 0
 
[ -f /etc/default/rcS ] && . /etc/default/rcS
. /lib/lsb/init-functions
 
 
haproxy_start()
{
    start-stop-daemon --start --pidfile "$PIDFILE" \
        --exec $HAPROXY -- -f "$CONFIG" -D -p "$PIDFILE" \
        $EXTRAOPTS || return 2
    return 0
}
 
haproxy_stop()
{
    if [ ! -f $PIDFILE ] ; then
        # This is a success according to LSB
        return 0
    fi
    for pid in $(cat $PIDFILE) ; do
        /bin/kill $pid || return 4
    done
    rm -f $PIDFILE
    return 0
}
 
haproxy_reload()
{
    $HAPROXY -f "$CONFIG" -p $PIDFILE -D $EXTRAOPTS -sf $(cat $PIDFILE) \
        || return 2
    return 0
}
 
haproxy_status()
{
    if [ ! -f $PIDFILE ] ; then
        # program not running
        return 3
    fi
 
    for pid in $(cat $PIDFILE) ; do
        if ! ps --no-headers p "$pid" | grep haproxy > /dev/null ; then
            # program running, bogus pidfile
            return 1
        fi
    done
 
    return 0
}
 
haproxy_configtest()
{
    $HAPROXY -f "$CONFIG" -c > "$CONFIGTEST_LOG" 2>&1
    ret=$?
    if [ $ret -eq 0 ]; then
        # Valid config - remove $CONFIGTEST_LOG
        rm "$CONFIGTEST_LOG"
    fi
 
    return $ret
}
 
 
case "$1" in
start)
    log_daemon_msg "Starting haproxy" "haproxy"
    haproxy_start
    ret=$?
    case "$ret" in
    0)
        log_end_msg 0
        ;;
    1)
        log_end_msg 1
        echo "pid file '$PIDFILE' found, haproxy not started."
        ;;
    2)
        log_end_msg 1
        ;;
    esac
    exit $ret
    ;;
stop)
    log_daemon_msg "Stopping haproxy" "haproxy"
    haproxy_stop
    ret=$?
    case "$ret" in
    0|1)
        log_end_msg 0
        ;;
    2)
        log_end_msg 1
        ;;
    esac
    exit $ret
    ;;
reload|force-reload)
    log_daemon_msg "Reloading haproxy" "haproxy"
    haproxy_reload
    case "$?" in
    0|1)
        log_end_msg 0
        ;;
    2)
        log_end_msg 1
        ;;
    esac
    ;;
restart)
    log_daemon_msg "Checking haproxy configuration" "haproxy"
    haproxy_configtest
    ret=$?
    case "$ret" in
    0)
        log_end_msg 0
        ;;
    1)
        log_end_msg 1
        echo "Restart process aborted."
        echo "Check $CONFIGTEST_LOG for details."
        # Abort restart
        exit $ret
        ;;
    esac
    log_daemon_msg "Restarting haproxy" "haproxy"
    haproxy_stop
    haproxy_start
    case "$?" in
    0)
        log_end_msg 0
        ;;
    1)
        log_end_msg 1
        ;;
    2)
        log_end_msg 1
        ;;
    esac
    ;;
status)
    haproxy_status
    ret=$?
    case "$ret" in
    0)
        echo "haproxy is running."
        ;;
    1)
        echo "haproxy dead, but $PIDFILE exists."
        ;;
    *)
        echo "haproxy not running."
        ;;
    esac
    exit $ret
    ;;
configtest)
    haproxy_configtest
    ret=$?
    case "$ret" in
    0)
        echo "haproxy configuration is valid."
        ;;
    1)
        echo "haproxy configuration is NOT valid. Check $CONFIGTEST_LOG for details."
        ;;
    esac
    exit $ret
    ;;
*)
    echo "Usage: /etc/init.d/haproxy {start|stop|reload|restart|status|configtest}"
    exit 2
    ;;
esac
 
:

haproxy.sample.cfg

global
    daemon
    maxconn 256
 
defaults
    mode http
    timeout connect 5000ms
    timeout client 50000ms
    timeout server 50000ms
 
frontend http-in
    bind *:80
    default_backend neo4j-slaves
 
backend neo4j-slaves
    option httpchk GET /db/manage/server/ha/slave
    server s1 10.0.1.10:7474 maxconn 32 check
    server s2 10.0.1.11:7474 maxconn 32 check
    server s3 10.0.1.12:7474 maxconn 32 check
 
listen admin
    bind *:8080
    stats enable

install.sh

apt-get build-dep -y haproxy
apt-get install -y libssl-dev
wget http://haproxy.1wt.eu/download/1.5/src/devel/haproxy-1.5-dev21.tar.gz
tar xzvf haproxy-1.5-dev21.tar.gz
cd haproxy-1.5-dev21/
make TARGET="linux26" USE_STATIC_PCRE=1 USE_OPENSSL=1
make install
curl https://gist.github.com/luhn/9038945/raw/haproxy.initd > /etc/init.d/haproxy
chmod +x /etc/init.d/haproxy
mkdir /etc/haproxy
update-rc.d haproxy defaults
adduser --system haproxy
groupadd haproxy
usermod -G haproxy haproxy
curl https://gist.github.com/luhn/9038945/raw/haproxy.sample.cfg > /etc/haproxy/haproxy.cfg