haproxy部署

环境	主机名	主机	IP地址
centos7	localhost1	服务端	192.168.88.128
centos7	localhost2	客户端	192.168.88.129
centos7	localhost3	客户端	192.168.88.130

1. 服务端安装haproxy

//下载haproxy安装包并解压
[root@localhost1 ~]# wget http://www.haproxy.org/download/2.2/src/haproxy-2.2.1.tar.gz
[root@localhost1 ~]# tar xf haproxy-2.2.1.tar.gz//安装依赖环境
[root@localhost1 ~]# yum -y install gcc gcc-c++ pcre-devel openssl-devel systemd-devel//创建haproxy用户
[root@localhost1 ~]# useradd -r -M -s /sbin/nologin haproxy//编译安装
[root@localhost1 ~]# cd haproxy-2.2.1/
[root@localhost1 haproxy-2.2.1]# make -j $(nproc) TARGET=linux-glibc USE_OPENSSL=1 USE_ZLIB=1 USE_PCRE=1 USE_SYSTEMD=1
[root@localhost1 haproxy-2.2.1]# make install

2. 配置各个负载的内核参数

[root@localhost1 ~]# echo 'net.ipv4.ip_nonlocal_bind = 1' >>  /etc/sysctl.conf
[root@localhost1 ~]# echo 'net.ipv4.ip_forward = 1' >> /etc/sysctl.conf
[root@localhost1 ~]# sysctl  -p
net.ipv4.ip_nonlocal_bind = 1
net.ipv4.ip_forward = 1

3. 编辑配置文件

[root@localhost1 ~]# mkdir /etc/haproxy
[root@localhost1 ~]# cat > /etc/haproxy/haproxy.cfg <<EOF
#--------------全局配置----------------
globallog 127.0.0.1 local0  info#log loghost local0 infomaxconn 20480
#chroot /usr/local/haproxypidfile /var/run/haproxy.pid#maxconn 4000user haproxygroup haproxydaemon
#---------------------------------------------------------------------
#common defaults that all the 'listen' and 'backend' sections will
#use if not designated in their block
#---------------------------------------------------------------------
defaultsmode httplog globaloption dontlognulloption httpcloseoption httplog#option forwardforoption redispatchbalance roundrobintimeout connect 10stimeout client 10stimeout server 10stimeout check 10smaxconn 60000retries 3
#--------------统计页面配置------------------
listen admin_statsbind 0.0.0.0:8189stats enablemode httplog globalstats uri /haproxy_statsstats realm Haproxy\ Statisticsstats auth admin:admin#stats hide-versionstats admin if TRUEstats refresh 30s
#---------------web设置-----------------------
listen webclusterbind 0.0.0.0:80mode http#option httpchk GET /index.htmllog globalmaxconn 3000balance roundrobincookie SESSION_COOKIE insert indirect nocacheserver web01 192.168.88.129:80 check inter 2000 fall 5server web02 192.168.88.130:80 check inter 2000 fall 5#server web01 192.168.80.102:80 cookie web01 check inter 2000 fall 5
EOF

4. 添加systemctl支持

[root@localhost1 ~]# cat > /usr/lib/systemd/system/haproxy.service <<EOF
[Unit]
Description=HAProxy Load Balancer
After=syslog.target network.target[Service]
ExecStartPre=/usr/local/sbin/haproxy -f /etc/haproxy/haproxy.cfg   -c -q
ExecStart=/usr/local/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg  -p /var/run/haproxy.pid
ExecReload=/bin/kill -USR2 $MAINPID[Install]
WantedBy=multi-user.target
EOF[root@localhost1 ~]# systemctl daemon-reload

5. 启用日志

[root@localhost1 ~]# vim /etc/rsyslog.conf
# Save boot messages also to boot.log
local7.*                                                /var/log/boot.log
local0.*                                       /var/log/haproxy.log    //添加此行[root@localhost1 ~]# systemctl restart rsyslog.service

6. 启动服务

[root@localhost1 ~]# systemctl enable --now haproxy
[root@localhost1 ~]# ss -antl
State       Recv-Q Send-Q Local Address:Port               Peer Address:Port              
LISTEN      0      100    127.0.0.1:25                   *:*                  
LISTEN      0      128      *:8189                 *:*                  
LISTEN      0      128      *:80                   *:*                  
LISTEN      0      128      *:22                   *:*                  
LISTEN      0      100      [::1]:25                    [::]:*                  
LISTEN      0      128       [::]:22                    [::]:*

7. 客户端安装apache

[root@localhost2 ~]# yum -y install httpd
[root@localhost2 ~]# systemctl enable --now httpd.service    //设置开机自动启动
[root@localhost2 ~]# echo 'localhost2' > /var/www/html/index.html    //设置首页[root@localhost3 ~]# yum -y install httpd
[root@localhost3 ~]# systemctl enable --now httpd.service    //设置开机自动启动
[root@localhost3 ~]# echo 'localhost3' > /var/www/html/index.html    //设置首页

8. 在浏览器上测试

• 第一次访问192.168.88.128显示localhost2
  
• 第二次访问192.168.88.128显示localhost3，多尝试几次看是否循环
  

9. 访问haproxy web界面控制台

在浏览器上输入：192.168.88.128:8189/haproxy_stats

看到这个界面表示登陆成功

10. 对haproxy进行压力测试

使用第四台虚拟机进行ab压测

//安装工具
[root@localhost ~]# yum -y install httpd-tools
[root@localhost ~]# ab -n 100000 -c 5 http://192.168.88.128:80/index/html

11. 停止localhost2的httpd服务测试

[root@localhost2 ~]# systemctl stop httpd.service 
[root@localhost2 ~]# ss -antl
State       Recv-Q Send-Q Local Address:Port               Peer Address:Port              
LISTEN      0      100    127.0.0.1:25                   *:*                  
LISTEN      0      128      *:22                   *:*                  
LISTEN      0      100      [::1]:25                    [::]:*                  
LISTEN      0      128       [::]:22                    [::]:*