项目分布17:部署HA高可用集群

拓扑结构

调度器高可用集群拓扑

拓扑图

Ip规划

IP规划

准备备用调度器主机

主机haproxy98做如下配置

– 安装haproxy软件

[root@haproxy98 ~]# yum -y install haproxy

– 修改配置文件(配置与haproxy99主机相同)

[root@haproxy98 ~]# vim /etc/haproxy/haproxy.cfg

– 启动服务

[root@haproxy98 ~]# systemctl start haproxy

[root@haproxy98 ~]# systemctl enable haproxy

[root@haproxy98 ~]# ps -C haproxy

[root@haproxy98 ~]# ss -antulp | grep haproxy

– 测试配置

MySQL [(none)]> select @@hostname;

查询结果

MySQL [(none)]> select @@hostname;

查询结果

多次连接访问显示不同的主机名

安装软件

在主机haproxy99/98分别安装软件keepalived

[root@haproxy99 ~]# yum -y install keepalived

[root@haproxy98 ~]# yum -y install keepalived

修改配置文件

修改主haproxy99 的 /etc/keepalived/keepalived.conf

global_defs {

   notification_email {

     acassen@firewall.loc

     failover@firewall.loc

     sysadmin@firewall.loc

   }

   notification_email_fromAlexandre.Cassen@firewall.loc

   smtp_server 192.168.200.1

   smtp_connect_timeout 30

   router_id LVS_DEVEL

   vrrp_skip_check_adv_addr

   vrrp_strict

   vrrp_garp_interval 0

   vrrp_gna_interval 0

   vrrp_iptables

}

vrrp_instance VI_1 {

    state MASTER

    interface eth0

    virtual_router_id 51

    priority 150

    advert_int 1

    authentication {

        auth_type PASS

        auth_pass 1111

    }

    virtual_ipaddress {

        192.168.4.100

    }

}

修改haproxy98的/etc/keepalived/keepalived.conf

[root@haproxy98 ~]# vim

/etc/keepalived/keepalived.conf

global_defs {

   notification_email {

     acassen@firewall.loc

     failover@firewall.loc

     sysadmin@firewall.loc

   }

   notification_email_fromAlexandre.Cassen@firewall.loc

   smtp_server 192.168.200.1

   smtp_connect_timeout 30

   router_id LVS_DEVEL

   vrrp_skip_check_adv_addr

   vrrp_strict

   vrrp_garp_interval 0

   vrrp_gna_interval 0

   vrrp_iptables

}

vrrp_instance VI_1 {

    state BACKUP

    interface eth0

    virtual_router_id 51

    priority 100

    advert_int 1

    authentication {

        auth_type PASS

        auth_pass 1111

    }

    virtual_ipaddress {

        192.168.4.100

    }

}

启动服务

在两台主机上分别启动keepalived服务

启动主的keepalived服务

[root@haproxy99 ~]# systemctl start keepalived

[root@haproxy99 ~]# systemctl enable keepalived

[root@haproxy99 ~]# systemctl status keepalived

启动备的keepalived服务

[root@haproxy98 ~]# systemctl start keepalived.service

[root@haproxy98 ~]# systemctl enable keepalived.service

[root@haproxy98 ~]# systemctl status keepalived

测试配置

在客户端连接vip地址访问数据

[root@client ~]# mysql -h 192.168.4.100 -uyaya99 -p123qqq...A

连接vip地址

MySQL [(none)]> select @@hostname;

[root@client ~]# ping 192.168.4.100 查看vip地址能不能ping通

[root@haproxy99 ~]# ip addr show | grep 192.168.4.100

    inet 192.168.4.100/32 scopeglobal eth0

[root@haproxy98 ~]# ip addr show | grep 192.168.4.100 //查找不到

在haproxy99上关闭keepalived服务,查看vip会不会转移到haproxy98上去,测试高可用

[root@haproxy99 ~]# systemctl stop keepalived

[root@haproxy98 ~]# ip addr show | grep 192.168.4.100

    inet 192.168.4.100/32 scopeglobal eth0

Vip地址转移到了haproxy98上

重启服务,查看vip地址是否回到优先级高的haproxy99

[root@haproxy99 ~]# systemctl start keepalived

[root@haproxy99 ~]# ip addr show | grep 192.168.4.100

    inet 192.168.4.100/32 scopeglobal eth0