Build a Web cluster using Haproxy

Build a Web cluster using Haproxy

Experimental Introduction: Haproxy is a popular cluster scheduling tool, compared to similar cluster scheduling tools such as LVs and Nginx, LVS performance is the best, but the building is relatively complex, nginx upstream module support cluster function, However, the health function of the cluster node is not strong, the performance is not haproxy good, so this time we use Haproxy to build the cluster.

Case Environment

Host	Operating System	IP Address	main software
Haproxy Server	Centos 7	192.169.100.222	Haproxy-1.5.19.tar.gz
Nginx server 1	Centos 7	192.168.100.221	Nginx-1.15.0.tar.gz
Nginx server 2	Centos 7	192.168.100.220	Nginx-1.15.0.tar.gz
Client	Win7	192.168.100.100	IE browser

1. First compile and install two Nginx server as node (real) server. First install the required Toolkit and development package for the compilation.

yum install -y pcre-devel \               #pcre语言开发包zlib-devel \               #压缩模块开发包gcc \                      #c语言包gcc-c++ \                  #c++语言包make                       #make工具包

2, Nginx service program by default is run as nobody, add users and groups running Nginx, do not establish the host folder, and also prohibit logging into the shell environment.

useradd -M -s /sbin/nologin nginx    #-M 不建立家目录 -s 指定shell环境

3, unzip the nginx-1.15.0.tar.gz to the/OPT directory, easy to compile and install

tar zxvf nginx-1.15.0.tar.gz -C /opt/

4. Switch to the/opt/nginx-1.15.0 directory for configuration

cd /opt/nginx-1.15.0./configure \                    #指定配置程序--prefix=/usr/local/nginx \      #指定安装路径--user=nginx \                   #指定运行用户--group=nginx                    #指定运行组

5, to compile and install

make && make install

6, after installation, to the default home storage directory, set up a test page

cd /usr/local/nginx/htmlecho "this is accp web" > test.html

7, the Nginx Start command to establish a soft link to the/usr/local/sbin, directory.

ln -s /usr/local/nginx/sbin/nginx /usr/local/sbin/

8. Start the Nginx and see if the 80 port of the system is turned on.

nginxnetstat -ntap | grep nginx

9, in order to facilitate the experiment, the URL is not configured domain name, directly with IP access, in the client Access http://192.168.100.220/test.html test, as shown in.

10, build another Nginx server, the same steps, the difference is to establish a test page.

cd /usr/local/nginx/htmlecho "this is benet web" > test.html

11. Test the client Access http://192.168.100.221/test.html as shown in

12. Compile and install Haproxy in the dispatch server, install the required development kits and kits with the Yum repository

yum install -y pcre-devel bzip2-devel \               #安装bzip2压缩模块gcc gcc-c++ make

13. Unzip the haproxy-1.5.19 into the/opt directory

tar zxvf haproxy-1.5.19.tar.gz -C /opt/

14, to the haproxy-1.5.19 directory, to compile and install

cd haproxy-1.5.19/make TARGET=linux26        #指定为64位系统make install

15, establish the Haproxy configuration file

16, configure the Haproxy configuration file, where globle is the global configuration, defaults is the default setting, listen for the application component configuration, delete the following statement.

chroot /usr/share/haproxy  #更换haproxy根目录redispatch                 #强制发送请求到已经down掉的服务器

17. Remove all listen items and replace them with the following statements, and then save the exit.

listen  webcluster 0.0.0.0:80        option httpchk GET /test.html        balance roundrobin        server inst1 192.168.100.221:80 check inter 2000 fall 3        server inst2 192.168.100.222:80 check inter 2000 fall 3

18. Copy the Haproxy Boot command to the system startup directory and add the Execute permission to join the system administration.

cp /opt/haproxy-1.5.19/examples/haproxy.init /etc/init.d/haproxychmod +x haproxychkconfig --add /etc/init.d/haproxyln -s /usr/local/sbin/haproxy /usr/sbin/haproxy

19. Open Haproxy Service

service haproxy start

20, test the Web cluster, open http://192.168.100.222/test.html in the client browser, access two times

Build a Web cluster using Haproxy