编译安装haproxy

编译安装HAproxy

具体的安装方法和注意事项请参考源码包中自带的README文件
这里安装的是haproxy-1.6.4
系统为centos6.4 i386

一.安装声明
1.To build haproxy, you will need :
  - GNU make. Neither Solaris nor OpenBSD's make work with the GNU Makefile.
    If you get many syntax errors when running "make", you may want to retry
    with "gmake" which is the name commonly used for GNU make on BSD systems.
  - GCC between 2.95 and 4.8. Others may work, but not tested.
  - GNU ld
  
Also, you might want to build with libpcre support, which will provide a very
efficient regex implementation and will also fix some badness on Solaris' one.

2.To build haproxy, you have to choose your target OS amongst the following ones
and assign it to the TARGET variable :

  - linux22     for Linux 2.2
  - linux24     for Linux 2.4 and above (default)
  - linux24e    for Linux 2.4 with support for a working epoll (> 0.21)
  - linux26     for Linux 2.6 and above
  - linux2628   for Linux 2.6.28, 3.x, and above (enables splice and tproxy)
  - solaris     for Solaris 8 or 10 (others untested)
  - freebsd     for FreeBSD 5 to 10 (others untested)
  - netbsd      for NetBSD
  - osx         for Mac OS/X
  - openbsd     for OpenBSD 3.1 and above
  - aix51       for AIX 5.1
  - aix52       for AIX 5.2
  - cygwin      for Cygwin
  - generic     for any other OS or version.
  - custom      to manually adjust every setting


3.You may also choose your CPU to benefit from some optimizations. This is
particularly important on UltraSparc machines. For this, you can assign
one of the following choices to the CPU variable :

  - i686 for intel PentiumPro, Pentium 2 and above, AMD Athlon
  - i586 for intel Pentium, AMD K6, VIA C3.
  - ultrasparc : Sun UltraSparc I/II/III/IV processor
  - native : use the build machine's specific processor optimizations. Use with
    extreme care, and never in virtualized environments (known to break).
  - generic : any other processor or no CPU-specific optimization. (default)

二.编译安装
1.
[root@localhost haproxy-1.6.4]# uname -r
2.6.32-431.el6.i686

2.[root@localhost haproxy-1.6.4]# pwd
/root/haproxy-1.6.4

[root@localhost haproxy-1.6.4]# make TARGET=linux26 ARCH=i386

[root@localhost haproxy-1.6.4]# make install
install -d "/usr/local/sbin"
install haproxy  "/usr/local/sbin"    
install -d "/usr/local/share/man"/man1
install -m 644 doc/haproxy.1 "/usr/local/share/man"/man1
install -d "/usr/local/doc/haproxy"
for x in architecture close-options configuration cookie-options intro linux-syn-cookies lua management network-namespaces proxy-protocol; do \
                install -m 644 doc/$x.txt "/usr/local/doc/haproxy" ; \
        done

三.其他事项
1.创建配置文件
[root@localhost haproxy-1.6.4]# pwd
/root/haproxy-1.6.4
[root@localhost haproxy-1.6.4]# cp -p examples/option-http_proxy.cfg /etc/haproxy/haproxy.cfg
或者
将准备好的内容直接覆盖源配置文件，这里我用的是后面的配置(最后面有)，未用option-http_proxy.cfg配置；

2.创建启动文件(也可以无需启动文件来启动服务)
[root@localhost haproxy-1.6.4]# cp -p examples/haproxy.init /etc/rc.d/init.d/haproxy

[root@localhost haproxy-1.6.4]# chmod +x /etc/rc.d/init.d/haproxy

[root@localhost haproxy-1.6.4]# chkconfig --add haproxy


3.启动haproxy服务
因为配置文件中说明了运行haproxy的用户和组为haproxy，因此先创建：
[root@localhost haproxy-1.6.4]# useradd haproxy

[root@localhost haproxy-1.6.4]# groupadd haproxy


启动服务时出现以下错误：
[root@localhost haproxy]# service haproxy start
/etc/init.d/haproxy: line 98: /usr/sbin/haproxy: No such file or directory
Errors found in configuration file, check it with 'haproxy check'.

解决办法：
编辑/etc/rc.d/init.d/haproxy,将第98行的BIN=/usr/sbin/$BASENAME  改为 BIN=/usr/local/sbin/$BASENAME
因为安装时显示install haproxy  /usr/local/sbin而不是/usr/sbin

再次启动：
[root@localhost haproxy]# service haproxy start
Starting haproxy: [ALERT] 099/171716 (21186) : [/usr/local/sbin/haproxy.main()] Cannot chroot(/var/lib/haproxy).
[FAILED]

解决办法：将配置文件中的chroot    /var/lib/haproxy一行注释掉

再次启动(注意，此时的80端口不要被占用)：
[root@localhost haproxy]# service haproxy start
Starting haproxy: [  OK  ]
[root@localhost haproxy]# netstat -ntlp | grep :80
tcp        0      0 0.0.0.0:80       0.0.0.0:*       LISTEN      21201/haproxy 

另一种启动方式(如果出现错误请根据提示解决)：
[root@localhost haproxy]# haproxy -f /etc/haproxy/haproxy.cfg
[root@localhost haproxy]# netstat -ntlp | grep :80
tcp        0      0 0.0.0.0:80                  0.0.0.0:*                   LISTEN      21244/haproxy       
 
4.测试设置的监控页面
浏览器地址栏中输入ip:1080/haproxyadmin?stats显示如下这说明没问题


附：haproxy.cfg配置文件示例
global
    log         127.0.0.1 local2
    pidfile     /var/run/haproxy.pid
    maxconn     4000
    user        haproxy
    group       haproxy
    daemon


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                 30000


listen stats
    mode http
    bind 0.0.0.0:1080
    stats enable
    stats hide-version
    stats uri     /haproxyadmin?stats
    stats realm   Haproxy\ Statistics
    stats auth    admin:admin
    stats admin if TRUE


frontend http-in
    bind *:80
    mode http
    log global
    option httpclose
    option logasap
    option dontlognull
    capture request  header Host len 20
    capture request  header Referer len 60
    default_backend servers


frontend healthcheck
    bind :1099
    mode http
    option httpclose
    option forwardfor
    default_backend servers


backend servers
  balance roundrobin
    server websrv1 192.168.85.156:80 check maxconn 2000
    server websrv2 192.168.85.157:80 check maxconn 2000