Keepalived是一个类似于layer3, 4 & 7交换机制的软件，也就是我们平时说的第3层、第4层和第7层交换。Keepalived是自动完成，不需人工干涉。
调度服务器： 需要在LVS的基础上面做。
参考 https://www.linuxidc.com/Linux/2018-03/151514.htm
一块网卡： Vmnet1：192.168.80.100 主与从调度器上都做下面的3步的：加载、安装ipvsadm包 下载地址：http://www.keepalived.org/download.html [root@lss ~]# modprobe ip_vs [root@lss ~]# rpm -ivh /mnt/Packages/ipvsadm-1.27-7.el7.x86_64.rpm ---------keepalived安装配置（主、从都要配置的）---- [root@lss ~]# yum -y install popt-devel kernel-devel openssl-devel WinSCP上传keepalived到主从服务器
[root@lss ~]# tar fx keepalived-1.4.2.tar.gz -C /opt [root@lss opt]# cd /opt/keepalived-1.4.2/ [root@lss keepalived-1.4.2]# yum -y install gcc gcc-c make [root@lss keepalived-1.4.2]# ./configure --prefix=/ [root@lss keepalived-1.4.2]# make && make install [root@lss keepalived]# cp -r /opt/keepalived-1.4.2/keepalived/etc/keepalived/ /etc/init.d [root@lss keepalived]# systemctl enable keepalived --------------------------------修改配置文件（主调度器）------------- [root@lss keepalived]# vi /etc/keepalived/keepalived.conf ! Configuration File for keepalived global_defs { notification_email {br/>acassen@firewall.loc failover@firewall.locbr/>sysadmin@firewall.loc } notification_email_from Alexandre.Cassen@firewall.loc smtp_server 192.168.200.1 smtp_connect_timeout 30 router_id LVS_01 }
vrrp_instance VI_1 { state MASTER interface ens33 virtual_router_id 51 priority 110 advert_int 1 authentication { auth_type PASS auth_pass 6666 } virtual_ipaddress { 192.168.80.188 } } virtual_server 192.168.80.188 80 { delay_loop 6 lb_algo rr lb_kind DR persistence_timeout 60 protocol TCP real_server 192.168.80.101 80 { weight 1 TCP_CHECK { connect_port 80 connect_timeout 3 nb_get_retry 3 delay_before_retry 3 } } real_server 192.168.80.102 80 { weight 1 TCP_CHECK { connect_port 80 connect_timeout 3 nb_get_retry 3 delay_before_retry 3 } } } [root@lss keepalived]# service keepalived start [root@lss keepalived]# ip addr show dev ens33 //验证绑定了虚拟地址 inet 192.168.80.188/32 scope global ens33 [root@lss keepalived]# ipvsadm -L [root@lss keepalived]# tail -f /var/log/messages //对业务服务器和主调度器进行关闭验证热备及健康检查效果。 MASTER STATE代表主服务器 BACKUP STATE代表备用服务器
---------------------------------修改配置文件（从调度器）----------------- [root@LSS03 ~]# modprobe ip_vs [root@LSS03 ~]# rpm -ivh /mnt/Packages/ipvsadm-1.27-7.el7.x86_64.rpm [root@LSS03 ~]# yum -y install gcc gcc-c make [root@LSS03 ~]# tar fx keepalived-1.4.2.tar.gz -C /opt [root@LSS03 ~]# cd /opt/keepalived-1.4.2/ [root@LSS03 keepalived-1.4.2]# ./configure --prefix=/ [root@LSS03 keepalived-1.4.2]# make && make install [root@LSS03 keepalived-1.4.2]# cp -r keepalived/etc/init.d/keepalived /etc/init.d/ [root@LSS03 keepalived-1.4.2]# systemctl enable keepalived [root@LSS03 keepalived-1.4.2]# vi /etc/keepalived/keepalived.conf ! Configuration File for keepalived
global_defs { notification_email { root@localhost.localdomain } notification_email_from benet root@localhost.localdomain smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id LVS_02 //主从要不相同 }
vrrp_instance VI_1 { state BACKUP //从调度器的热备状态 interface ens33 virtual_router_id 51 //编号主与从的两边要一样的 priority 105 //从调度器的优先级 advert_int 1 authentication { //主、从热备认证信息 auth_type PASS auth_pass 6666 } virtual_ipaddress { //指定群集VIP地址（虚拟服务器地址），可以指定多个的 192.168.80.188 } }
virtual_server 192.168.80.188 80 { //虚拟服务器地址（VIP）、端口 delay_loop 6 //健康检查的间隔时间（秒）正常情况下。 lb_algo rr //轮询（rr）调度算法 lb_kind DR //直接路由（DR）群集工作模式 persistence_timeout 60 //连接保持时间，（秒），若注释掉加个"!"在这个时间内同一客户端的请求被同一服务器处理 protocol TCP //应用服务采用的是TCP协议
real_server 192.168.80.101 80 { //第一个web节点的地址、端口 weight 1 //节点的权重 TCP_CHECK { //健康检查方式 connect_port 80 //检查的目标端口 connect_timeout 3 //连接超时（秒） nb_get_retry 3 //重试次数 delay_before_retry 3 //重试间隔（秒） } } real_server 192.168.80.102 80 { //第二个web节点的地址、端口 weight 1 TCP_CHECK { connect_port 80 connect_timeout 3 nb_get_retry 3 delay_before_retry 3 } } } [root@LSS03 keepalived-1.4.2]# service keepalived start [root@LSS03 keepalived-1.4.2]# ip addr show dev ens33 [root@LSS03 keepalived-1.4.2]# tail -f /var/log/messages MASTER STATE代表主服务器 BACKUP STATE代表备用服务器
以下是WEB服务器： 192.168.80.101服务器： [root@lss01 ~]# yum install -y httpd [root@lss01 ~]# vi /etc/httpd/conf/httpd.confServerName www.aa.com [root@lss01 ~]# vi /var/www/html/index.html <h1>Server aa </h1>
192.168.80.102服务器： [root@lss02 ~]# yum install -y httpd [root@lss02 ~]# vi /etc/httpd/conf/httpd.conf ServerName www.bb.com [root@lss02 ~]# vi /var/www/html/index.html <h1>Server bb </h1>
