haproxy的官方地址：http://www.haproxy.org

HAproxy的官方学习文档：http://cbonte.github.io/haproxy-dconv/1.7/intro.html

下载：http://www.haproxy.org/download/1.7/src/haproxy-1.7.2.tar.gz

# tar xzf haproxy-1.7.2.tar.gz
# cd haproxy-1.7.2
# make PREFIX=/usr/local/haproxy/ TARGET=linux2628 USE_PCRE=1 USE_OPENSSL=1 USE_ZLIB=1
# make install PREFIX=/usr/local/haproxy/

安装可参考：https://github.com/haproxy/haproxy-1.5

Tips 1：为什么目录中没有configure？先来熟悉下一般软件的安装过程

1. 使用configure配置软件（例如：prefix=/usr/local/xxx），会生成 Makefile
2. make，开始编译，把源代码编译成可执行二进制代码
3. make install，把可执行程序移动到指定位置，权限赋值等操作

而在HAproxy中已经存在配置好的 Makefile 文件，所以直接执行 make 命令即可。

Tips 2：为什么在make 和 make install 中，可以需要指定PREFIX 、TARGET呢？

从 1 中的安装过程可以看出来，安装的重要过程是make 编译，只要有Makefile 文件，就可以执行make，而Makefile 其实是一个 shell 脚本，从HAproxy的Makefile的shell脚本中，可以看到是允许传入prefix和Target参数的，打开Makefile的脚本，也可以看到默认的PREFIX=/usr/local ，而此处指定为/usr/local/haproxy/。至于TARGET参数，在Makefile的文件中，也可以看到，类似于

ifeq ($(TARGET),generic)
  # generic system target has nothing specific
  USE_POLL   = implicit
  USE_TPROXY = implicit
else
ifeq ($(TARGET),haiku)
  # For Haiku
  TARGET_LDFLAGS = -lnetwork
  USE_POLL = implicit
  USE_TPROXY = implicit
else
ifeq ($(TARGET),linux22)
  # This is for Linux 2.2
  USE_GETSOCKNAME = implicit
  USE_POLL        = implicit
  USE_TPROXY      = implicit
  USE_LIBCRYPT    = implicit
  USE_DL          = implicit
else
ifeq ($(TARGET),linux24)
  # This is for standard Linux 2.4 with netfilter but without epoll()
  USE_GETSOCKNAME = implicit
  USE_NETFILTER   = implicit
  USE_POLL        = implicit
  USE_TPROXY      = implicit
  USE_LIBCRYPT    = implicit
  USE_DL          = implicit
else
ifeq ($(TARGET),linux24e)
  # This is for enhanced Linux 2.4 with netfilter and epoll() patch > 0.21
  USE_GETSOCKNAME = implicit
  USE_NETFILTER   = implicit
  USE_POLL        = implicit
  USE_EPOLL       = implicit
  USE_MY_EPOLL    = implicit
  USE_TPROXY      = implicit
  USE_LIBCRYPT    = implicit
  USE_DL          = implicit
else
ifeq ($(TARGET),linux26)
  # This is for standard Linux 2.6 with netfilter and standard epoll()
  USE_GETSOCKNAME = implicit
  USE_NETFILTER   = implicit
  USE_POLL        = implicit
  USE_EPOLL       = implicit
  USE_TPROXY      = implicit
  USE_LIBCRYPT    = implicit
  USE_FUTEX       = implicit
  EXTRA          += haproxy-systemd-wrapper
  USE_DL          = implicit
else
ifeq ($(TARGET),linux2628)
  # This is for standard Linux >= 2.6.28 with netfilter, epoll, tproxy and splice
  USE_GETSOCKNAME = implicit
  USE_NETFILTER   = implicit
  USE_POLL        = implicit
  USE_EPOLL       = implicit
  USE_TPROXY      = implicit
  USE_LIBCRYPT    = implicit
  USE_LINUX_SPLICE= implicit
  USE_LINUX_TPROXY= implicit
  USE_ACCEPT4     = implicit
  USE_FUTEX       = implicit
  USE_CPU_AFFINITY= implicit
  ASSUME_SPLICE_WORKS= implicit
  EXTRA          += haproxy-systemd-wrapper
  USE_DL          = implicit
else
ifeq ($(TARGET),solaris)
  # This is for Solaris 8
  # We also enable getaddrinfo() which works since solaris 8.
  USE_POLL       = implicit
  TARGET_CFLAGS  = -fomit-frame-pointer -DFD_SETSIZE=65536 -D_REENTRANT
  TARGET_LDFLAGS = -lnsl -lsocket
  USE_TPROXY     = implicit
  USE_LIBCRYPT    = implicit
  USE_CRYPT_H     = implicit
  USE_GETADDRINFO = implicit
else
ifeq ($(TARGET),freebsd)
  # This is for FreeBSD
  USE_POLL       = implicit
  USE_KQUEUE     = implicit
  USE_TPROXY     = implicit
  USE_LIBCRYPT   = implicit
else
ifeq ($(TARGET),osx)
  # This is for Mac OS/X
  USE_POLL       = implicit
  USE_KQUEUE     = implicit
  USE_TPROXY     = implicit
else
ifeq ($(TARGET),openbsd)
  # This is for OpenBSD >= 5.7
  USE_POLL       = implicit
  USE_KQUEUE     = implicit
  USE_TPROXY     = implicit
  USE_ACCEPT4    = implicit
else
ifeq ($(TARGET),netbsd)
  # This is for NetBSD
  USE_POLL       = implicit
  USE_KQUEUE     = implicit
  USE_TPROXY     = implicit
else
ifeq ($(TARGET),aix51)
  # This is for AIX 5.1
  USE_POLL        = implicit
  USE_LIBCRYPT    = implicit
  TARGET_CFLAGS   = -Dss_family=__ss_family
  DEBUG_CFLAGS    =
else
ifeq ($(TARGET),aix52)
  # This is for AIX 5.2 and later
  USE_POLL        = implicit
  USE_LIBCRYPT    = implicit
  TARGET_CFLAGS   = -D_MSGQSUPPORT
  DEBUG_CFLAGS    =
else
ifeq ($(TARGET),cygwin)
USE_POLL   = implicit
  USE_TPROXY = implicit
  TARGET_CFLAGS  = $(if $(filter 1.5.%, $(shell uname -r)), 
-DUSE_IPV6 -DAF_INET6=23 -DINET6_ADDRSTRLEN=46, )
endif # cygwin
endif # aix52
endif # aix51
endif # netbsd
endif # openbsd
endif # osx
endif # freebsd
endif # solaris
endif # linux2628
endif # linux26
endif # linux24e
endif # linux24
endif # linux22
endif # haiku
endif # generic

从以上的代码中，可以看到，根据系统的内核不同，配置会不一样，编译会不一样。这里附上一个查看Linux版本的文章：[centos7]查看系统版本、CPU的方法

启动haproxy

# /usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/conf/haproxy.cfg

重启haproxy

# /usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/conf/haproxy.cfg 
-st `cat /run/haproxy.pid`

停止haproxy

# kill all haproxy

制作 haproxy启动/关闭/重启SHELL脚本

复制 /haproxy-1.7.2/examples/haproxy.init 到/etc/init.d/haproxy，并相应的更改

vim /etc/init.d/haproxy
＃更改BIN和CFG的路径

#BIN=/usr/sbin/$BASENAME
BIN=/usr/local/bin/haproxy

#CFG=/etc/$BASENAME/$BASENAME.cfg
CFG=/usr/local/haproxy/conf/haproxy.cfg

错误：haproxy: 第 26 行:[: =: 期待一元表达式

[ ${NETWORKING} = "no" ] && exit 0
[ "$NETWORKING" = "no" ] && exit 0

这样就可以使用：

service start haporxy
service stop haproxy
service restart haproxy
service reload haproxy