cd /etc/haproxy/
 cp haproxy.cfg haproxy.cfg.old


# cat /etc/haproxy/haproxy.cfg
#---------------------------------------------------------------------
# Example configuration for a possible web application.  See the
# full configuration options online.
#
#   http://haproxy.1wt.eu/download/1.4/doc/configuration.txt
#
#---------------------------------------------------------------------

#---------------------------------------------------------------------
# Global settings
#---------------------------------------------------------------------
global
    # to have these messages end up in /var/log/haproxy.log you will
    # need to:
    #
    # 1) configure syslog to accept network log events.  This is done
    #    by adding the '-r' option to the SYSLOGD_OPTIONS in
    #    /etc/sysconfig/syslog
    #
    # 2) configure local2 events to go to the /var/log/haproxy.log
    #   file. A line like the following can be added to
    #   /etc/sysconfig/syslog
    #
    #    local2.*                       /var/log/haproxy.log
    #
    log         127.0.0.1 local2

    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    maxconn     40000
    user        haproxy
    group       haproxy
    daemon

    # turn on stats unix socket
    stats socket /var/lib/haproxy/stats

#---------------------------------------------------------------------
# common defaults that all the 'listen' and 'backend' sections will
# use if not designated in their block
#---------------------------------------------------------------------
defaults
    mode                    http
    log                     global
    option                  httplog
    option                  dontlognull
    option http-server-close
    option forwardfor       except 127.0.0.0/8
    option                  redispatch
    retries                 3
    timeout http-request    10s
    timeout queue           1m
    timeout connect         10s
    timeout client          1m
    timeout server          1m
    timeout http-keep-alive 10s
    timeout check           10s
    maxconn                 40000

#---------------------------------------------------------------------
# main frontend which proxys to the backends
#---------------------------------------------------------------------
frontend  main *:80
#    acl url_static       path_beg       -i /static /images /javascript /stylesheets
#    acl url_static       path_end       -i .jpg .gif .png .css .js

#    use_backend static          if url_static
    default_backend             app

#---------------------------------------------------------------------
# static backend for serving up images, stylesheets and such
#---------------------------------------------------------------------
#backend static
#    balance     roundrobin
#    server      static 172.16.0.6:80 check

#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
backend app
    balance     roundrobin
    server  app1 10.0.0.68:80 check
    server  app2 10.0.0.69:80 check
#    server  app3 127.0.0.1:5003 check
#    server  app4 127.0.0.1:5004 check


[root@r610 haproxy]# /etc/init.d/haproxy start
Starting haproxy:                                          [  OK  ]
			
			

lobal
        log 127.0.0.1   local0
        log 127.0.0.1   local1 notice
        #log loghost    local0 info
        maxconn 4096
        #debug
        #quiet
        user haproxy
        group haproxy

defaults
        log     global
        mode    http
        option  httplog
        option  dontlognull
        retries 3
        redispatch
        maxconn 2000
        contimeout      5000
        clitimeout      50000
        srvtimeout      50000

listen web 192.168.0.1:80
       mode http
       balance roundrobin
       cookie JSESSIONID prefix
       option httpclose
       option forwardfor
       option httpchk HEAD /index.html HTTP/1.0
       server web1 192.168.0.2:80 cookie A check
       server web2 192.168.0.3:80 cookie B check
				

listen tomcat *:8080
        maxconn 4096
        mode http
        balance leastconn
        option httpclose # disable keep-alive
        option forwardfor
        option httpchk GET /index.jsp
		server tomcat_A 172.19.35.33:8080 check port 8080 inter 2000 rise 2 fall 3
		server tomcat_B 172.19.35.44:8080 check port 8080 inter 2000 rise 2 fall 3
				

			
global
	log 127.0.0.1	local0
	log 127.0.0.1	local1 notice
	#log loghost	local0 info
	maxconn 4096
	#chroot /usr/share/haproxy
	user haproxy
	group haproxy
	daemon
	#debug
	#quiet

defaults
	log	global
	mode	http
	option	httplog
	option	dontlognull
	retries	3
	option redispatch
	maxconn	2000
	contimeout	5000
	clitimeout	50000
	srvtimeout	50000

listen proxy	0.0.0.0:3128
	server	proxy_node_1	203.185.193.198:3128
	server	proxy_node_2	219.190.126.147:3128
			
			

生成自签名证书的步骤, 如果你有购买的证书，此处略过

$ sudo mkdir /etc/ssl/example.com
$ sudo openssl genrsa -out /etc/ssl/example.com/example.com.key 1024
$ sudo openssl req -new -key /etc/ssl/example.com/example.com.key -out /etc/ssl/example.com/example.com.csr
> Country Name (2 letter code) [AU]:CN
> State or Province Name (full name) [Some-State]:Guangdong
> Locality Name (eg, city) []:Shenzhen
> Organization Name (eg, company) [Internet Widgits Pty Ltd]:example
> Organizational Unit Name (eg, section) []:
> Common Name (e.g. server FQDN or YOUR name) []:*.example.com
> Email Address []:
> Please enter the following 'extra' attributes to be sent with your certificate request
> A challenge password []:
> An optional company name []:
$ sudo openssl x509 -req -days 365 -in /etc/ssl/example.com/example.com.csr -signkey /etc/ssl/example.com/example.com.key -out /etc/ssl/example.com/example.com.crt

$ sudo cat /etc/ssl/example.com/example.com.crt /etc/ssl/example.com/example.com.key | sudo tee /etc/ssl/example.com/example.com.pem			
			

/etc/haproxy/haproxy.cfg

frontend localhost
    bind *:80
    bind *:443 ssl crt /etc/ssl/example.com/example.com.pem
    mode http
    default_backend nodes
    
backend nodes
    mode http
    balance roundrobin
    option forwardfor
    option httpchk HEAD / HTTP/1.1\r\nHost:www.example.com
    server web01 172.16.0.1:80 check
    server web02 172.16.0.2:80 check
    server web03 172.16.0.3:80 check
    http-request set-header X-Forwarded-Port %[dst_port]
    http-request add-header X-Forwarded-Proto https if { ssl_fc }    			
			

HTTP强行跳转倒HTTP的配置方法

frontend localhost
    bind *:80
    bind *:443 ssl crt /etc/ssl/example.com/example.com.pem
    redirect scheme https if !{ ssl_fc }
    mode http
    default_backend nodes			
			

frontend localhost
    bind *:80
    bind *:443
    option tcplog
    mode tcp
    default_backend nodes
    
backend nodes
    mode tcp
    balance roundrobin
    option ssl-hello-chk
    server web01 172.16.0.3:443 check
    server web02 172.16.0.4:443 check    
			

listen smtp
	bind *:25
	mode tcp
	balance leastconn
	option smtpchk
	server smtp1 173.254.223.53:25 check
	server smtp2 45.33.242.42:25 check