nginx负载均衡三:keepalive+nginx双机热备 和负载均衡
环境 centos7.0 nginx:1.15
1.主备四台服务器
f1:负载均衡 192.168.70.169
f2:web站点 192.168.70.170
f3:web站点 192.168.70.172
f4:web站点 192.168.70.173
2.安装keepalived需要的依赖包
yum install openssl-devel yum install popt-devel yum install ipvsadm yum install libnl*
3.下载keepalived
yum install keepalived
4.修改主服务器配置文件
vim /etc/keepalived/keepalived.conf
主服务器配置 192.168.70.169
global_defs { notification_email { acassen@firewall.loc // 没有配置服务器邮箱,可以去掉 failover@firewall.loc sysadmin@firewall.loc } notification_email_from Alexandre.Cassen@firewall.loc smtp_server 192.168.200.1 smtp_connect_timeout 30 router_id LVS_DEVEL } vrrp_instance VI_1 { state MASTER // 双机热备(主) interface eth4 // 选择网络(用ip add 查看网络,选择其中1个) virtual_router_id 51 // 和(副机)一样 priority 100 // 主机选100(副机要低于100) advert_int 1 authentication { auth_type PASS auth_pass 1111 // 密码(主副要保持一直) } virtual_ipaddress { 192.168.70.84 // 虚拟ip(随便写一个没用过的),通常写1个(也可以多个),注意:这里不是填写web服务器ip(如:192.168.70.172,192.168.70.173) #192.168.70.83 } }
副服务器配置 192.168.70.170
global_defs { notification_email { acassen@firewall.loc failover@firewall.loc sysadmin@firewall.loc } notification_email_from Alexandre.Cassen@firewall.loc smtp_server 192.168.200.1 smtp_connect_timeout 30 router_id LVS_DEVEL } vrrp_instance VI_1 { state BACKUP interface eth4 virtual_router_id 51 priority 50 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { #192.168.70.83 192.168.70.84 } }
5.浏览器打开
5.1启动主服务器
service keepalived start // 或者 #systemctl start keepalived
再浏览器打开:192.168.70.84
5.2关闭主服务器,打开BACKUP服务器
service keepalived start // 或者 #systemctl start keepalived
再浏览器打开:192.168.70.84
总结:打开192.168.70.84 都可以访问到内容
最后nginx负载均衡
总结:
准备
f1:负载均衡 192.168.70.169 (keepalived主)
f2:web站点 192.168.70.170(keepalived副)
f3:web站点 192.168.70.172(web站点)
f4:web站点 192.168.70.173(web站点)
步骤1:给192.168.70.169配置负载均衡,给192.168.70.170配置负载均衡
步骤2:keepalived创建虚拟ip:192.168.70.84把192.168.70.169和192.168.70.170进行关联