Too young, too simple. Sometimes, naive & stupid

使用HAPROXY和KEEPALIVED负载均衡简单示例

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防火墙配置

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firewall-cmd --zone=public --add-port=80/tcp --permanent
firewall-cmd --reload

指定自己需要开放的端口来替换80/tcp

安装配置Keepalived

  1. 两个节点安装Keepalived

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    yum -y install keepalived

  2. 编辑Keepalived配置文件

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    vim /etc/keepalive/keepalived.conf

    内容如下：

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    vrrp_script chk_haproxy {
      script "killall -0 haproxy" # check the haproxy process
      interval 2 # every 2 seconds
      weight 2 # add 2 points if OK
    }

    vrrp_instance VI_1 {
      interface eth0 # interface to monitor
      state MASTER # MASTER on haproxy, BACKUP on haproxy2
      virtual_router_id 51
      priority 101 # 101 on haproxy, 100 on haproxy2
      virtual_ipaddress {
        192.168.0.100 # virtual ip address
      }
      track_script {
        chk_haproxy
      }
    }

  3. 启动服务：

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    systemctl enable keepalived ; systemctl start keepalived

安装配置HAProxy

  1. 安装HAProxy。

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    yum -y install haproxy

  2. 配置HAProxy。

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    vim /etc/haproxy/haproxy.cfg

    内容：

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    frontend http_web *:80
        mode http
        default_backend rgw

    backend rgw
        balance roundrobin
        mode http
        server  rgw1 10.0.0.71:80 check
        server  rgw2 10.0.0.80:80 check

  3. 启动服务：

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    systemctl enable haproxy ; systemctl start haproxy