Nginx+keepalived实现七层的负载均衡的高可用(最新解决方案),
Nginx+keepalived实现七层的负载均衡的高可用(最新解决方案),
目录
- Nginx+keepalived实现七层的负载均衡的高可用
- 一、准备服务器
- 1、主机清单
- 2、配置安装nginx 所有的机器,关闭防火墙和selinux
- 二、部署负载均衡
- 1、修改nginx的配置文件,添加以下内容,
- 2、重启nginx
- 3.修改server1、server2的web页面测试
- 4..访问负载均衡
- 三、Keepalived实现调度器HA
- 1、 主/备调度器安装软件
- 2、备份keepalived配置文件
- 3、修改配置文件
- 4、启动keepalived(主备均启动)
- 5、通过停止keepalived来测试VIP是否飘逸
- 四、解决nginx服务故障
- 1、作用
- 2、检查nginx健康的脚本
- 3、测试
Nginx+keepalived实现七层的负载均衡的高可用
一、准备服务器
1、主机清单
主机名 | ip | 系统 |
---|---|---|
Proxy-master | 10.12.153.105 | centos7.5 |
Proxy-slave | 10.12.153.176 | centos7.5 |
Real-server1 | 10.12.153.114 | Centos7.5 |
Real-server2 | 10.12.153.187 | centos7.5 |
2、配置安装nginx 所有的机器,关闭防火墙和selinux
[root@proxy-master ~]# systemctl stop firewalld //关闭防火墙 [root@proxy-master ~]# sed -i 's/^SELINUX=.*/SELINUX=disabled/' /etc/sysconfig/selinux //关闭selinux,重启生效 [root@proxy-master ~]# setenforce 0 //关闭selinux,临时生效
3.安装nginx, 全部4台
[root@proxy-master ~]# cd /etc/yum.repos.d/ [root@proxy-master yum.repos.d]# vim nginx.repo [nginx-stable] name=nginx stable repo baseurl=http://nginx.org/packages/centos/$releasever/$basearch/ gpgcheck=0 enabled=1 [root@proxy-master yum.repos.d]# yum install yum-utils -y [root@proxy-master yum.repos.d]# yum install nginx -y
二、部署负载均衡
1、选择两台nginx服务器作为代理服务器。
2、给两台代理服务器安装keepalived制作高可用生成VIP
3、配置nginx的负载均衡
#两台代理配置一样
1、修改nginx的配置文件,添加以下内容,
#注意:将/etc/nginx/conf.d/default.conf改名,不然转发不过去
[root@proxy-slave conf.d]# mv default.conf default.conf.back
upstream backend { server 10.12.153.114:80 weight=1 max_fails=3 fail_timeout=20s; server 10.12.153.187:80 weight=1 max_fails=3 fail_timeout=20s; } server { listen 80; server_name localhost; location / { proxy_pass http://backend; proxy_set_header Host $host:$proxy_port; proxy_set_header X-Forwarded-For $remote_addr; } }
2、重启nginx
[root@proxy-master ~]# nginx -s reload
3.修改server1、server2的web页面测试
[root@server2 ~]# cat >>/usr/share/nginx/html/index.html<<EOF > 187 > EOF [root@server1 html]# cat >/usr/share/nginx/html/index.html<<EOF > 114 > EOF
4..访问负载均衡
负载均衡正常
三、Keepalived实现调度器HA
注:主/备调度器均能够实现正常调度
1、 主/备调度器安装软件
[root@proxy-master ~]# yum install -y keepalived [root@proxy-slave ~]# yum install -y keepalived
2、备份keepalived配置文件
[root@proxy-master ~]# cp /etc/keepalived/keepalived.conf /etc/keepalived/keepalived.conf.bak
3、修改配置文件
①修改master
[root@proxy-master ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived global_defs { router_id directory1 #辅助改为directory2 } : vrrp_instance VI_1 { state MASTER #定义主还是备 interface ens33 #VIP绑定接口 virtual_router_id 80 #整个集群的调度器一致 priority 100 #back改为50 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 10.12.153.151/24 # vip } }
②修改slave
[root@proxy-slave ~]# vim /etc/keepalived/keepalived.conf
! Configuration File for keepalived global_defs { router_id directory2 } vrrp_instance VI_1 { state BACKUP #设置为backup interface ens33 nopreempt #设置到back上面,不抢占资源 virtual_router_id 80 priority 50 #辅助改为50 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 10.12.153.151/24 } }
4、启动keepalived(主备均启动)
[root@proxy-master ~]# systemctl enable keepalived [root@proxy-slave ~]# systemctl start keepalived
5、通过停止keepalived来测试VIP是否飘逸
①在master,slave上查看
②停掉master的keepalived来模仿master宕机,看VIP是否飘逸
由此可见nginx的高可用成功
到此:
可以解决心跳故障keepalived
不能解决Nginx服务故障
四、解决nginx服务故障
扩展对调度器Nginx健康检查(可选)两台都设置
1、作用
让Keepalived以一定时间间隔执行一个外部脚本,脚本的功能是当Nginx失败,则关闭本机的Keepalived
2、检查nginx健康的脚本
! Configuration File for keepalived global_defs { router_id directory1 #辅助改为directory2 } : vrrp_script check_nginx { script "/etc/keepalived/check_nginx_status.sh" interval 5 } vrrp_instance VI_1 { state MASTER #定义主还是备 interface ens33 #VIP绑定接口 virtual_router_id 80 #整个集群的调度器一致 priority 100 #back改为50 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 10.12.153.151/24 # vip } track_script { check_nginx } }
注:必须先启动nginx,再启动keepalived
3、测试
停止master的nginx,VIP会飘逸到salve上,
再次启动master的nginx,重启master的keepalived,VIP会飘到master上。
到此这篇关于Nginx+keepalived实现七层的负载均衡的高可用的文章就介绍到这了,更多相关Nginx keepalived七层负载均衡内容请搜索PHP之友以前的文章或继续浏览下面的相关文章希望大家以后多多支持PHP之友!
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