docker安装和配置nginx

配置nginx

docker配置nginx

本机ip是192.168.0.200
docker pull nginx

配置nginx主机

vi /root/docker/nginx/nginx01.conf

写入

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 192.168.0.200:8080;
		server 192.168.0.200:8081;
		server 192.168.0.200:8082;
	}
	server {
        listen       5050;
        server_name  192.168.0.200;
        location / {
            proxy_pass   http://tomcat;
            index  index.html index.htm;
        }
    }
}

docker运行:

docker run -d --net=host -v /root/docker/nginx/nginx01.conf:/etc/nginx/nginx.conf --name=n1 --privileged nginx

配置nginx备机

vi /root/docker/nginx/nginx02.conf

写入

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 192.168.0.200:8080;
		server 192.168.0.200:8081;
		server 192.168.0.200:8082;
	}
	server {
        listen       5051;
        server_name  192.168.0.200;
        location / {
            proxy_pass   http://tomcat;
            index  index.html index.htm;
        }
    }
}

运行:

docker run -d --net=host -v /root/docker/nginx/nginx02.conf:/etc/nginx/nginx.conf --name=n2 --privileged nginx

配置 keepalived实现双机热备

配置前环境了解

• 虚拟ip: 192.168.0.201
• nginx主机ip: 192.168.0.200:5050
• nginx备机ip: 192.168.0.200:5051

配置主机

• 进入 docker 容器虚拟机

docker exec -it n1 bash

• 更新下apt

apt update

• 下载 keepalived

apt-get install keepalived -y

• 下载 vim

apt-get install vim -y

• 修改keepalived配置

vi /etc/keepalived/keepalived.conf

写入配置

global_defs {
   # 路由id：当前安装keepalived的节点主机标识符，保证全局唯一
   router_id keep_104
}

vrrp_instance VI_1 {
    # 表示状态是MASTER主机还是备用机BACKUP
    state MASTER
    # 该实例绑定的网卡名称
    interface ens33
    # 保证主备节点一致即可
    virtual_router_id 51
    # 权重，master权重一般高于backup，如果有多个，那就是选举，谁的权重高，谁就当选
    priority 100
    # 主备之间同步检查时间间隔，单位秒
    advert_int 2
    # 认证权限密码，防止非法节点进入
    authentication {
        auth_type PASS
        auth_pass 123456
    }
    # 虚拟出来的ip，可以有多个（vip）
    virtual_ipaddress {
        192.168.0.199
    }
}

virtual_server 192.168.0.199 5000 {
    delay_loop 3
    lb_algo rr
    lb_kind NAT
    persistence_timeout 50
    protocol TCP
    real_server 192.168.0.200 5050 {
        weight 1
    }
}

• 启动keepalived

root@centOS:/# service keepalived start
[ ok ] Starting keepalived: keepalived.

配置备机

• 进入 docker 容器虚拟机

docker exec -it n2 bash

• 更新下apt

apt update

• 下载 keepalived

apt-get install keepalived -y

• 下载 vim

apt-get install vim -y

• 修改keepalived配置

vi /etc/keepalived/keepalived.conf

global_defs {
   router_id keep_105
}

vrrp_instance VI_1 {
    # 备用机设置为BACKUP
    state BACKUP
    interface ens33
    virtual_router_id 51
    # 权重低于MASTER
    priority 80
    advert_int 2
    authentication {
        auth_type PASS
        auth_pass 123456
    }
    virtual_ipaddress {
        # 注意：主备两台的vip都是一样的，绑定到同一个vip
        192.168.0.199
    }
}

virtual_server 192.168.0.199 5000 {
    delay_loop 3
    lb_algo rr
    lb_kind NAT
    persistence_timeout 50
    protocol TCP
    real_server 192.168.0.200 5051 {
        weight 1
    }
}

• 启动keepalived

root@centOS:/# service keepalived start
[ ok ] Starting keepalived: keepalived.

记得退出
exit

开启docker容器内的ps指令: apt-get install procps -y

接下来我们可以知道
nginx配置的ip地址:

http://192.168.0.200:5050/renren-fast/swagger/index.html
http://192.168.0.200:5051/renren-fast/swagger/index.html

此时keepalivedIP地址和端口
192.168.0.199:5000
一主一备