Haproxy implementing the Web for balanced configuration

I system RedHat6.4, haproxy version is haproxy-1.3.15.10.tar.gz

Installation

installation PCRE

– [Email protected]~]# yum-y Install pcre pcre-devel

Unzip and enter the Haproxy directory

– [Email protected]~]# tar xvzf haproxy-1.4.24.tar.gz

– [[Email protected]~]# CD haproxy-1.4.24

View kernel version number

– [[Email protected]~]# uname-r

Installation

– [[email protected]~]# make target=linux2628 \

> use_pcre=1 prefix=/usr/local/haproxy Install ( use_pcre=1 enable regular)

2.

Establish Symbolic links for Haproxy

Ln-s/usr/local/haproxy/sbin/haproxy \

/usr/local/sbin/

Copy the sample configuration file from the installation source directory to the Haproxy installation directory

– [[Email protected]~]# mkdir/usr/local/haproxy/conf

– [email protected]~]# cp examples/haproxy.cfg \

>/usr/local/haproxy/conf/haproxy.cfg

3. Configuration Files

(1) Description

HAProxy configuration parameter source

– command line. Always has the highest priority

– Global section. Setting process-level parameters globally

– The proxy Declarations section. From default,listen,frontend, and backend

The configuration file can be composed of the following parts:

– Default

Set default parameters for other parts of the follow -up

Default parameters can be reset by subsequent parts

– frontend

describes the receive client listening socket (socket) Set

– Backend

A server set that describes forwarding links

– Listen

A complete statement that binds frontend and backend together

(2) Example

Globals// Global Settings

Log 127.0.0.1 local0// logging Output configuration

Maxconn 4096// maximum number of connections concurrent links

Chroot/usr/local/haproxy

UID// user uid of the owning run

GID// the user group that belongs to run

Daemon// running daemons in the background

Nbproc 2// start 2 haproxy instances and the number of CPUs

creation of the Pidfile/usr/local/haproxy/run/haproxy.pid run

Defaults// default settings

Log Global

Mode HTTP// default in HTTP mode 3 kinds :http TCP Health

Option Httplog// log category

Retries 3//3 Connection failed to consider server unavailable

option redispatch// when the serverid corresponding server is hung out ,

force directed to other health servers

Stats uri/haproxy-admin// set up monitoring and control directory just name it.

Contimeout//Connection time- out

Clitimeout 50000// Client connection time-out

Srvtimeout 50000// server-side connection time-out

Listen Websrv-rewrite 0.0.0.0:80//Listening address, can write Haproxy address, can also be written as 0.0.0.0, listen to all local addresses

Cookie ServerID Rewrite

Balance Roundrobin Load Balancing Method

Server App1_1 192.168.20.101:80cookie app1inst1 check Inter rise 2 Fall 5 weight 1 (realserver) Heartbeat Detection frequency:5 microseconds detection failure proof he's dead.

Server App1_2 192.168.20.102:80cookie app1inst2 check Inter rise 2 Fall 5 weight 1

Web server real IP address, and configure a good Web service

4. Control Server Status

start the service

– [Email protected]~]# haproxy-f \

>/usr/local/haproxy/conf/haproxy.cfg

Stop service

– [Email protected]~]# killall Haproxy

Restart service

– [email protected]~]# haproxy-f haproxy.cfg \

>-st ' pidof haproxy ' get pid restart

5. Monitor HAProxy status

Http://192.168.194.10/haproxy-admin

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