keepalived高可用与nginx反向代理实战

柔光的暖阳◎ 2022-05-16 02:08 258阅读 0赞

*  1.环境
 *  2.查看nginx与keepalived的配置
    
     *  2.1查看lb-01主节点配置
     *  2.2查看lb-02备节点配置
 *  3.启动nginx+keepalived
 *  4.测试nginx反向代理
    
     *  4.1lb-01主节点测试nginx反向代理
     *  4.2lb-02备节点测试nginx反向代理
 *  5.测试keepalived
    
     *  5.1关掉主节点的keepalived后，查看备节点是否接管
     *  5.2开启主节点，查看备节点是否释放
 *  6.网页访问测试
    
     *  6.1配置本地hosts,访问
     *  6.2关闭主节点，网页测试

# 1.环境 #

nginx+keepalived
    lb-01（主节点）10.0.0.10
    lb-02（备节点）10.0.0.11
    web服务
    client-01 10.0.0.12
    client-02 10.0.0.13

# 2.查看nginx与keepalived的配置 #

## 2.1查看lb-01主节点配置 ##

[root@lb01 ~]# cat /application/nginx-1.6.2/conf/nginx.conf
    worker_processes  1;
    events {
        worker_connections  1024;
    }
    http {
        include       mime.types;
        default_type  application/octet-stream;
        sendfile        on;
        upstream jingtai {
        server 10.0.0.12:80 weight=5;
        }
        upstream dongtai {
        server 10.0.0.13:80 weight=5;
        }
        upstream lbproxy {
        server 10.0.0.12:80 weight=5;
        server 10.0.0.13:80 weight=5;
        #server 10.0.0.11:80 backup;
        }
        keepalive_timeout  65;
        server {
            listen       80;
            server_name  lb.liang.com;
            location / {
                root   html;
                index  index.html index.htm;
                proxy_pass http://lbproxy;
                include proxy.conf;
            }
            location /jingtai/ {
                proxy_pass http://jingtai;
                include proxy.conf;
            }
            location /dongtai/ {
                proxy_pass http://dongtai;
                include proxy.conf;
            }
        }
    }
    
    keepalived配置
    [root@lb01 ~]# cat /etc/keepalived/keepalived.conf
    global_defs {
       notification_email {
         123456-@qq.com
       }
       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 eth0 virtual_router_id 51 priority 150 advert_int 1 authentication { 
            auth_type PASS
            auth_pass 1111
        }
        virtual_ipaddress {
            10.0.0.100/24
        }

## 2.2查看lb-02备节点配置 ##

[root@lb02 ~]# cat /application/nginx-1.6.2/conf/nginx.conf
    worker_processes  1;
    events {
        worker_connections  1024;
    }
    http {
        include       mime.types;
        default_type  application/octet-stream;
        sendfile        on;
        upstream jingtai {
        server 10.0.0.12:80 weight=5;
        }
        upstream dongtai {
        server 10.0.0.13:80 weight=5;
        }
        upstream lbproxy {
        server 10.0.0.12:80 weight=5;
        server 10.0.0.13:80 weight=5;
        #server 10.0.0.11:80 backup;
        }
        keepalive_timeout  65;
        server {
            listen       80;
            server_name  lb.liang.com;
            location / {
                root   html;
                index  index.html index.htm;
                proxy_pass http://lbproxy;
                include proxy.conf;
            }
            location /jingtai/ {
                proxy_pass http://jingtai;
                include proxy.conf;
            }
            location /dongtai/ {
                proxy_pass http://dongtai;
                include proxy.conf;
            }
        }
    }
    keepalived配置
    
    [root@lb02 ~]# cat /etc/keepalived/keepalived.conf 
    global_defs {
       notification_email {
         123456-@qq.com
       }
       notification_email_from Alexandre.Cassen@firewall.loc
       smtp_server 192.168.200.1
       smtp_connect_timeout 30
       router_id LVS_02
    }
    
    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 {
            10.0.0.100/24
        }

# 3.启动nginx+keepalived #

[root@lb01 ~]# ansible lb -m shell -a "nginx -s reload" 
    [root@lb01 ~]# ansible lb -m service -a "name=keepalived state=started"

# 4.测试nginx反向代理 #

## 4.1lb-01主节点测试nginx反向代理 ##

[root@lb01 ~]# curl www.liang.com
    10.0.0.13 www
    [root@lb01 ~]# curl www.liang.com
    10.0.0.12 www

## 4.2lb-02备节点测试nginx反向代理 ##

[root@lb02 ~]# curl www.liang.com
    10.0.0.12 www
    [root@lb02 ~]# curl www.liang.com
    10.0.0.13 www

# 5.测试keepalived #

## 5.1关掉主节点的keepalived后，查看备节点是否接管 ##

[root@lb01 ~]# ansible 10.0.0.10 -m service -a "name=keepalived state=stopped"
    10.0.0.10 | SUCCESS => {
        "changed": true, 
        "name": "keepalived", 
        "state": "stopped"
    }
    [root@lb01 ~]# ansible lb -m shell -a "ip add|grep 10.0.0.100" 
    10.0.0.10 | FAILED | rc=1 >>
    non-zero return code
    
    10.0.0.11 | SUCCESS | rc=0 >>
        inet 10.0.0.100/24 scope global secondary eth0

## 5.2开启主节点，查看备节点是否释放 ##

[root@lb01 ~]# ansible 10.0.0.10 -m service -a "name=keepalived state=started"
    10.0.0.10 | SUCCESS => {
        "changed": true, 
        "name": "keepalived", 
        "state": "started"
    }
    [root@lb01 ~]# ansible lb -m shell -a "ip add|grep 10.0.0.100"
    10.0.0.11 | SUCCESS | rc=0 >>
        inet 10.0.0.100/24 scope global secondary eth0
    
    10.0.0.10 | FAILED | rc=1 >>
    non-zero return code

# 6.网页访问测试 #

## 6.1配置本地hosts,访问 ##

![这里写图片描述][70]  
![这里写图片描述][70 1]  
![这里写图片描述][70 2]

## 6.2关闭主节点，网页测试 ##

\[root@lb01 ~\]\# ansible 10.0.0.10 -m service -a “name=keepalived state=started” 10.0.0.10 | SUCCESS => \{  
“changed”: false,  
“name”: “keepalived”,  
“state”: “started”  
\}  
\[root@lb01 ~\]\# ansible lb -m shell -a “ip add|grep 10.0.0.100” 10.0.0.10 | SUCCESS | rc=0 >>  
inet 10.0.0.100/24 scope global secondary eth0

10.0.0.11 | FAILED | rc=1 >>  
non-zero return code  
![这里写图片描述][70 3]  
![这里写图片描述][70 4]

[70]: /images/20220516/3472b49109574bdfaed5d73cdddf9ed0.png
[70 1]: /images/20220516/e4e25568edc34255ac15aec8ea2c9dd6.png
[70 2]: /images/20220516/966017441b6f457f8138d4415355afe6.png
[70 3]: /images/20220516/42f5e6a160ff459e9c5e55cf517183f0.png
[70 4]: /images/20220516/4142e3ba4231451eb4d8f16751aaec5d.png