Keepalived+Nginx双机热备

Keepalived实现nginx双机热备，实现高可用

安装nginx

# docker pull nginx

创建nginx配置文件

# vi /home/n1/nginx.conf

nginx.conf配置文件

user  nginx;
worker_processes  1;
 
error_log  /var/log/nginx/error.log warn;
pid        /var/run/nginx.pid;
 
events {
    worker_connections  1024;
}
 
http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;
 
    log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
                      '$status $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';
 
    access_log  /var/log/nginx/access.log  main;
 
    sendfile        on;
    #tcp_nopush     on;
 
    keepalive_timeout  65;
 
    #gzip  on;
    
    proxy_redirect          off;
    proxy_set_header        Host $host;
    proxy_set_header        X-Real-IP $remote_addr;
    proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
    client_max_body_size    10m;
    client_body_buffer_size   128k;
    proxy_connect_timeout   5s;
    proxy_send_timeout      5s;
    proxy_read_timeout      5s;
    proxy_buffer_size        4k;
    proxy_buffers           4 32k;
    proxy_busy_buffers_size  64k;
    proxy_temp_file_write_size 64k;
    
    upstream tomcat {
        server 192.168.186.129:6001;
        server 192.168.186.129:6002;
    }
    server {
        listen       6101;
        server_name  192.168.186.129; 
        location / {  
            proxy_pass   http://tomcat;
            index  index.html index.htm;  
        }  
 
    }
}

启动容器

# docker run -it -d --name n1 -v /home/n1/nginx.conf:/etc/nginx/nginx.conf --net=host --privileged nginx

进入容器

# docker exec -it n1 bash

安装keepalived

# apt-get update
# apt-get install keepalived
# apt-get install vim

创建keepalived配置文件

# vim /etc/keepalived/keepalived.conf

keepalived配置文件

  vrrp_instance VI_1{
    state MASTER
    interface  ens33
    virtual_router_id  51
    priority  100
    advert_int  1
    authentication{
        auth_type  PASS
        auth_pass  123456
    }
    virtual_ipaddress{
        192.168.186.151
    }  
  }
  
virtual_server 192.168.186.151 6201 {
    delay_loop 3
    lb_algo rr
    lb_kind NAT
    persistence_timeout 50
    protocol TCP
    real_server 192.168.186.129 6101 {
        weight 1
    } 
}

启动keepalived

# service keepalived start