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  • keepalived+haproxy 安装配置

    1.安装配置keepalived

    修改配置文件/etc/keepalived/keepalived.conf
    
    ! Configuration File for keepalived
    
    global_defs {
          router_id Node_A (另一台Node_B)
    }
    
    #vrrp_script check_haproxy {
    #    script "/etc/keepalived/check_haproxy.sh"  (如果启用脚本则打开注释)
    #    interval 2
    #    weight 2
    #}
    
    vrrp_instance VI_1 {
        state BACKUP
        interface eth0
        virtual_router_id 51
        priority 100 (另一台改为50)
        nopreempt
        advert_int 1
        authentication {
            auth_type PASS
            auth_pass 密码(自定义)
        }
    
    #    track_script {
    #        check_haproxy
    #    }
    
        virtual_ipaddress {
            VIP/掩码 dev eth0 label eth0:0
        }
    }

    check_haproxy.sh脚本内容

    #!/bin/bash
    
    /etc/init.d/haproxy status &> /dev/null || /etc/init.d/haproxy restart &> /dev/null
    
    if [ $? -ne 0 ]; then
      /etc/init.d/keepalived stop &> /dev/null
    fi

    2.安装haproxy,修改配置/etc/haproxy/haproxy.cfg

    删除frontend,backend块的内容,然后添加如下内容

    listen server (自定义名称)
        bind *:PORT(端口)
        mode tcp
        timeout connect         30s
        timeout client          30s
        timeout server          180s
        timeout check           180s
        no option dontlog-normal
        balance leastconn
        option socket-stats
        option tcplog
        option tcp-check
        tcp-check connect
        server rs1(自定义名称) IP:PORT weight 1 check inter 6000 rise 2 fall 3
        server rs2(自定义名称) IP:PORT weight 1 check inter 6000 rise 2 fall 3

    3.如果haproxy要配置监听在具体VIP上面

    listen server VIP:PORT
    
    如果遇到本机没有VIP,不能启动haproxy
    修改/etc/sysctl.conf文件
    net.ipv4.ip_nonlocal_bind = 1
    
    sysctl -p

     4.开启haproxy日志

    修改/etc/rsyslog.conf
    
    打开下面两行的注释
    $ModLoad imudp
    $UDPServerRun 514
    
    添加
    local2.*       /var/log/haproxy.log
    
    重启/etc/init.d/rsyslog restart
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  • 原文地址:https://www.cnblogs.com/wsl222000/p/7270042.html
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