环境： 两台Centos 7.4 最小化安装 软件：ipvsadm-1.27 keepalived-2.10.tar.gz IP： lvs01 192.168.189.81 lvs02 192.168.189.82 VIP 192.168.189.181 先清除lvs01 上面的VIP rm -rf /etc/sysconfig/network-scripts/ifcfg-ens33:1 systemctl restart network ++++++++++++++ nginx 01 nginx 02 +++++++++++++++++++++++ 后端Nginx负载均衡服务器配置VIP ifconfig lo:0 192.168.189.181 netmask 255.255.255.255 up chmod +x /etc/rc.d/rc.local echo "ifconfig lo:0 192.168.189.181 netmask 255.255.255.255 up" >>/etc/rc.local ARP抑制： vim /etc/sysctl.conf net.ipv4.conf.all.arp_ignore=1 net.ipv4.conf.lo.arp_ignore=1 net.ipv4.conf.all.arp_announce=2 net.ipv4.conf.lo.arp_announce=2 保存退出。 sysctl -p +++++++++++++++++++++++++++++++++++++++++++++++++++++ 一、安装ipvsadm lvs01 lvs02 安装ipvsadm keepalived yum install ipvsadm wget vim -y 安装依赖包： yum install -y gcc gcc-c++ openssl openssl-devel libnl libnl-devel libnfnetlink-devel cd /opt wget http://www.keepalived.org/software/keepalived-2.0.10.tar.gz tar zxvf keepalived-2.0.10.tar.gz cd keepalived-2.0.10/ ./configure --prefix=/usr/local/keepalived make && make install mkdir -p /etc/keepalived cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/二、修改配置文件 （lvs01 上操作） vim /etc/keepalived/keepalived.conf vrrp_instance LVS_1 { tate BACKUP interface ens33 nopreempt virtual_router_id 151 priority 100 advert_int 3 authentication { auth_type PASS auth_pass 654852 } virtual_ipaddress { 192.168.189.181/24 } } virtual_server 192.168.189.181 80 { delay_loop 3 lb_algo rr lb_kind DR protocol TCP real_server 192.168.189.79 80 { weight 1 TCP_CHECK { connect_port 80 connect_timeout 6 nb_get_retry 3 delay_before_retry 3 } } real_server 192.168.189.80 80 { weight 1 TCP_CHECK { connect_port 80 connect_timeout 6 nb_get_retry 3 delay_before_retry 3 } } } keepalived 安装完后，直接是支持systemctl 来启动的，只需要把配置文件拷贝到/etc/keepalived/ systemctl start keepalived systemctl enable keepalived ++++++++++++++++++++++++++++++++++++++++++++++ lvs02 上面的keepalived.conf priority 98 其余都相同。 systemctl start keepalived ++++++++++++++++++++++++++++++ keepalived + lvs 配置说明： delay_loop 3 # 3 秒检查一次 lb_algo rr # 使用的 轮循 算法 lb_kind DR # LVS的工作模式， protocol TCP # LVS使用的协议 real_server #配置后端真实服务器 real_server 配置说明： weight #配置后端真实服务器的权重 TCP_CHECK #对后端真实服务器进行健康检测 TCP_CHECK 配置说明 connect_port #检测端口 connect_timeout #超时时间 nb_get_retry #重试的次数 delay_before_retry #重试等待的时间 ++++++++++++++++++++++++++++++++++++++++++++++++++
检测配置： /usr/local/keepalived/sbin/keepalived -t -f /etc/keepalived/keepalived.conf
启动keepalived /usr/local/keepalived/sbin/keepalived -f /etc/keepalived/keepalived.conf 前面配置成了systemctl管理，就不需要用这条命令启动。
+++++++++++++++++++++++++++++++++++++++++++ 三、测试keepalived 自动添加、删除 后端真实服务器
模拟keepalived 自动删除后端服务器 在nginx01 上面，停掉 nginx pkill nginx 在lvs01 192.168.189.81上面查看：查看日志
在nginx01 ，再启动nginx systemctl start nginx lvs01 上面查看日志：
测试VIP飘移： kill 掉lvs01 上面的keepalived ，查看 VIP 以及 lvs 数据是否飘移
LVS01：
LVS02：
查看 lvs02 日志：
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