HAProxy负载均衡配置实战-优快云博客

负载均衡

vim /etc/haproxy/haproxy.cfg
 监听80端口，可以监听很多端口的
 62 #---------------------------------------------------------------------
 63 frontend  main
 64     bind    *:80
 65     default_backend             webserver
 66     #默认后端服务器组        后端服务器组名
 67 #---------------------------------------------------------------------

 73 #---------------------------------------------------------------------
 74 backend webserver        #后端服务器组
 75     balance     roundrobin
 76     server  server1 172.25.27.102:80 check        #节点1
 77     server  server2 172.25.27.103:80 check        #节点2
 78

源码编译

haproxy-1.7.3可以生成rpm,因为他的examples下有.spec文件

修改日至格式

vim /etc/rsyslog.conf
    #打开这两行注释，接收外来日志
    15 $ModLoad imudp
    16 $UDPServerRun 514
    复制这一行代码 24 local2.*                       /var/log/haproxy.log
    到/etc/rsyslog.conf的72行
systemctl start rsyslog.service
systemctl start haproxy.service
测试：
    curl 172.25.27.101
cat /var/log/haproxy.log

监控

stats uri    /admin/stats    监控后端状态
stats auth    admin:westos    设置访问密码
stats refresh     5s        5妙刷新状态
monitor-uri    /monitoruri    获取状态码

访问控制

  frotend     mian
    bind    *:80
    acl blacklist src 172.25.25.100       不允许100这台主机访问
    http-request deny if blacklist
    errorloc 403 http://172.25.27.101:8080/index.html    报403时，指定到101的默认页面
    default_backend        webserver

动静分离

frontend main
    bind    *:80
    use_backend dynamic if { path_end .php }    如果时以php结尾的请求，访问dynamic服务器组
     
    default_backend    static    默认访问static服务器组

backend dynamic        动态资源组
    balance    roundrobin
    server    web1 172.25.27.102:80 check    
backend static        静态资源组
    balance    roundrobin
    server    web2 172.25.27.103:80 check

读写分离

frontend main
    bind    *:80
    acl read method HEAD
    acl read method GET
    acl write method POST
    acl write method PUT

    use_backend dynamic if write
    use_backend static if read
    
    default_backend    static
backend dynamic
    balance    roundrobin
    server    web1 172.25.27.102:80 check

backend static
    balance    roundrobin
    server    web2 172.25.27.103:80 check