[cluster] haproxy load balancing

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Preface

The content of this blog is only to record the thoughts of bloggers , For reference only , Everything is subject to the results of their own practice .

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One 、haproxy Load balancing

1.0 Architecture Overview

effect	IP Address	Installation services
Main load balancer	192.168.13.10	haproxy-1.5.19
Node server 1	192.168.13.20	httpd
Node server 2	192.168.13.30	httpd
Log collector	192.168.13.40	ipvsadm/keepalived

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1.1 Load balancing scheduler

systemctl stop firewalld
setenforce 0
yum install -y pcre-devel bzip2-devel gcc gcc-c++ make
 Upload compressed package 
tar zxvf haproxy-1.5.19.tar.gz
cd haproxy-1.5.19/
make TARGET=linux2628 ARCH=x86_64
make install

mkdir /etc/haproxy
cp examples/haproxy.cfg /etc/haproxy/
vim /etc/haproxy/haproxy.cfg
	4 That's ok ：log /dev/log    local0
	5 That's ok ：log /dev/log    local1 notice
	
	8 That's ok ：#chroot /usr/share/haproxy
	26 Below row ： Delete all 
	26-30 That's ok ： Add node server information 
		listen  webcluster 0.0.0.0:80
        option httpchk GET /index.html
        balance roundrobin
        server inst1 192.168.13.20:80 check inter 2000 fall 3
        server inst1 192.168.13.30:80 check inter 2000 fall 3

cp /opt/haproxy-1.5.19/examples/haproxy.init /etc/init.d/haproxy
chmod +x /etc/init.d/haproxy
ln -s /usr/local/sbin/haproxy /usr/sbin/haproxy
service haproxy start

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1.2 Node server

systemctl stop firewalld
setenforce 0
yum install httpd -y
echo 'this is web1!' >/var/www/html/index.html
systemctl start httpd

 The other server repeats the operation 

Two 、 Conclusion

• Be steady , Wrong, take your time
• In the configuration file option httpchk GET /index.html This business , It corresponds to the last default file type of the node server , Must correspond to , Otherwise return to 503