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标题: CentOS8_Keepalived+LVS（二） [打印本页]

作者: admin 时间: 2020-7-27 13:38 标题: CentOS8_Keepalived+LVS（二）

笺注：这是在 CentOS8_Keepalived+LVS 的基础上进行的。以下是做MySQL/MariaDB的集群，使用TCP 3306端口。图片1.png

master和 slave在服务器池的配置是一样的： cat >>/etc/keepalived/keepalived.conf<< EOF virtual_server 192.168.168.180 3306 { protocol TCP ## 用TCP协议检查realserver的状态 delay_loop 10 ## 每隔10秒检查realserver的状态 lb_algo wlc ## LVS算法 lb_kind DR ## LVS模式 persistence_timeout 60 real_server 192.168.168.130 3306 { weight 100 ## 权重 TCP_CHECK { connect_timeout 10 ## 10秒无响应视为超时 connect_port 3306 nb_get_retry 3 delay_before_retry 4 } } real_server 192.168.168.190 3306 { weight 100 ## 权重 TCP_CHECK { connect_timeout 10 ## 10秒无响应视为超时 connect_port 3306 nb_get_retry 3 delay_before_retry 4 } } } EOF ## 注释：可以使用同一个VIP，但不同端口。重启Keepalived： [root@redhat8 ~]# systemctl restart keepalived 创建虚拟服务器： ipvsadm -A -t 192.168.168.180:3306 -s wlc 添加服务器节点： ipvsadm -a -t 192.168.168.180:3306 -r 192.168.168.130:3306 -g -w 100 ipvsadm -a -t 192.168.168.180:3306 -r 192.168.168.190:3306 -g -w 100 查看节点状态：（ ipvsadm -ln ）图片2.png

保存负载分配策略： [root@redhat8 ~]# ipvsadm-save > /etc/sysconfig/ipvsadm-config 确定保存结果： [root@redhat8 ~]# cat /etc/sysconfig/ipvsadm-config -A -t redhat8.zhuohua.store:http -s wlc -a -t redhat8.zhuohua.store:http -r 192.168.168.130:http -g -w 100 -a -t redhat8.zhuohua.store:http -r 192.168.168.190:http -g -w 100 -A -t redhat8.zhuohua.store:mysql -s wlc -a -t redhat8.zhuohua.store:mysql -r 192.168.168.130:mysql -g -w 100 -a -t redhat8.zhuohua.store:mysql -r 192.168.168.190:mysql -g -w 100 服务器的防火墙都要开启 TCP 3306 端口： firewall-cmd --zone=public --add-port=3306/tcp --permanent 使规则生效： firewall-cmd --reload web-1: mysql> grant all on *.* to zhuohua@'%' identified by '888'; Query OK, 0 rows affected (0.00 sec) mysql> create database db1; Query OK, 1 row affected (0.05 sec) 注释：服务器的防火墙都要开启 TCP 3306 端口。 web-2: MariaDB [(none)]> grant all on *.* to zhuohua@'%' identified by '888'; Query OK, 0 rows affected (0.090 sec) MariaDB [(none)]> create database db2; Query OK, 1 row affected (0.048 sec) 注释：服务器的防火墙都要开启 TCP 3306 端口。远程客户端测试：（要访问漂移IP地址）图片3.png

web-1: [root@Zabbix_server ~]# ifdown eth0 图片5.png

web-1: [root@Zabbix_server ~]# ifup eth0 web-2: [root@ser1 ~]# ifdown ens33 图片6.png

调度服务器查看轮询效果: [root@redhat8 ~]# ipvsadm -lnc IPVS connection entries pro expire state source virtual destination TCP 14:55 ESTABLISHED 192.168.168.159:1392 192.168.168.180:3306 192.168.168.130:3306 TCP 14:34 ESTABLISHED 192.168.168.159:1391 192.168.168.180:80 192.168.168.130:80 TCP 14:55 ESTABLISHED 192.168.168.159:1398 192.168.168.180:3306 192.168.168.190:3306 TCP 14:51 ESTABLISHED 192.168.168.159:1397 192.168.168.180:80 192.168.168.190:80 相关文章： CentOS8安装Mycat实现MySQL的读写分离

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