Install Haproxy under Redhat

install Haproxy under Redhat

First view the system kernel version number and system name

Uname-a
Linux rh64pfcrm01kf 2.6.32-358.el6.x86_64 #1 SMP Tue, 11:47:41 EST 2013 x86_64 x86_64 x86_64 gnu/linux

Haproxy Installation

Haproxy official website Download source code installation package http://www.haproxy.org/download/1.7/src/haproxy-1.7.5.tar.gz, and copy the source package to a Linux directory

Perform the following command to install Haproxy

TAR–XZVF haproxy-1.7.5.tar.gz  #解压文件
cd haproxy-1.7.5 make
target=linux2628 make
install PREFIX=/USR /local/haproxy

Problem encountered: Execute make target=linux2628 error: Make:gcc:Command not found
Workaround: GCC not installed, yum install GCC

Configure Haproxy.cfg
Examples of installation packages: Examples/option-http_proxy.cfg
My final configuration:

Global
    log 127.0.0.1 local3 info
    chroot/usr/local/haproxy
    pidfile     /var/run/haproxy.pid 
    User Haproxy
    Group haproxy
    Daemon
    stats socket/var/lib/haproxy/stats level admin
    maxconn 1024

Defaults
    log global
    mode TCP
    option Tcplog
    timeout Connect 5000
    timeout client 50000
    Timeout server 50000
    balance roundrobin
    Retries 3

Listen mysql_proxy_1
    bind ip.5451  #ip
    mode TCP
    server PlfA ip1:3306 Check weight 5 #mysql数据库服务器
    server PLFB ip2:3306 Check weight 5

Listen Stats
    bind 0.0.0.0:1080
    mode http
    maxconn 
    stats refresh 30s 
    stats 
    uri/stats stats Realm hapcloud\ haproxy 
    stats auth admin:** # user name and password stats hide-version 
    admin if TRUE

Configure script startup and shutdown Haproxy
There are also examples in the installation package:

Cp-p examples/haproxy.init/etc/rc.d/init.d/haproxy
chmod +x/etc/rc.d/init.d/haproxy
chkconfig–-add Haproxy
vi/etc/rc.d/init.d/haproxy  #这里需要把BIN的值替换为BIN =haproxy installation directory/sbin/$BASENAME

Start Service Haproxy Start
Turn off service Haproxy stop
Restart Service Haproxy Restart

Can be viewed through the Http://ip.1080/stats page after startup

Common instructions
Dynamic setting Weights: Weight value is 0-256

echo "Set weight Mysql_proxy_1/plfa 0" |socat stdio/var/lib/haproxy/stats set weight <backend>/<server> < weight>[%]

Dynamic shutdown and open background service

echo "Disable Server Mysql_proxy_1/plfa" | Socat stdio/var/lib/haproxy/stats Disable Server <backend>/<server>

echo "Enable Server Mysql_proxy_1/plfa" | Socat stdio/var/lib/haproxy/stats Enable server <backend>/<server>

MySQL Test

Mysql-uhaproxy-phaproxy123456-h*.*.*.*-p5451-d test-e "SELECT COUNT (1) from Test;"

Follow-up research on how to combine keepalived.