Detailed explanation of haproxy
CentOS自带了haproxy,但可能版本比较老。可以在IUS源上找到最新稳定版的haproxy。
cat /yum.repos.d/ius.repo [ius] name=iusrepo baseurl=https://mirrors.tuna.tsinghua.edu.cn/ius/stable/CentOS/$releasever/\$basearch gpgcheck=0 enable=1 eof yum -y install haproxy17u
以下是编译安装haproxy-1.7.10的过程。
编译安装haproxy时,可以借助于pcre环境,该环境下编译时借助正则表达式分析编译速度会快很多,但是没有该环境也可以安装。
yum -y install pcre pcre-devel tar xf haproxy-1.7.10.tar.gz cd haproxy-1.7.10 make TARGET=linux2628 ARCH=x86_64 PREFIX=/usr/local/haproxy USE_PCRE=1 make install PREFIX=/usr/local/haproxy
make时需要使用TARGET指定内核及版本,版本如下:
- 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 5.7 and above - aix51 for AIX 5.1 - aix52 for AIX 5.2 - cygwin for Cygwin - haiku for Haiku - generic for any other OS or version. - custom to manually adjust every setting
使用ARCH指定架构,不过ARCH选项可省。使用USE_PCRE=1表示使用PCRE环境编译,加快编译速度。
编译安装完成后,只有3个目录:doc、share和sbin,sbin里面只有一个haproxy的主程序haproxy。为了方便管理haproxy服务,可以从yum安装的haproxy中复制/etc/init.d/haproxy。
常用的几个:
# 检查配置文件语法 haproxy -c -f /etc/haproxy/haproxy.cfg # 以daemon模式启动,以systemd管理的daemon模式启动 haproxy -D -f /etc/haproxy/haproxy.cfg [-p /var/run/haproxy.pid] haproxy -Ds -f /etc/haproxy/haproxy.cfg [-p /var/run/haproxy.pid] # 启动调试功能,将显示所有连接和处理信息在屏幕 haproxy -d -f /etc/haproxy/haproxy.cfg # restart。需要使用st选项指定pid列表 haproxy -f /etc/haproxy.cfg [-p /var/run/haproxy.pid] -st `cat /var/run/haproxy.pid` # graceful restart,即reload。需要使用sf选项指定pid列表 haproxy -f /etc/haproxy.cfg [-p /var/run/haproxy.pid] -sf `cat /var/run/haproxy.pid` # 显示haproxy编译和启动信息 haproxy -vv
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