NGINX容器作为其他容器的代理

Question

我试图在我的UBUNTU服务器上运行容器，这些容器是：

1. DNS服务器与bind9.
2. NTP服务器与
3. 进行反向代理=>反向代理和NTP

我把这些容器放在同一个yaml文件中：

version: '3'
services:
  reverse-proxy-engine:
    image: nginx
    container_name: reverse-proxy-engine
    volumes:
      - ~/core/reverse-proxy/:/usr/share/nginx/
    ports:
      - "80:80"
      - "443:443"
      - "53:53"
      - "123:123/udp"
    depends_on:
      - "DNS-SRV"
      - "ntp"
  DNS-SRV:
    container_name: DNS-SRV
    image: ubuntu/bind9
    user: root
    environment:
      - TZ=UTC
    volumes:
      - ~/core/bind9/:/etc/bind/
  ntp:
    image: cturra/ntp
    container_name: ntp
    restart: always
    read_only: true
    tmpfs:
      - /etc/chrony:rw,mode=1750
      - /run/chrony:rw,mode=1750
      - /var/lib/chrony:rw,mode=1750
    environment:
      - NTP_SERVERS=time.cloudflare.com
      - LOG_LEVEL=0

运行此yaml文件后，将创建容器，我看到正确映射的端口：

admin@main-srv:~/core/yamls$ docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                            PORTS                                                                                NAMES
4720bae2a44c        nginx               "/docker-entrypoint.…"   5 seconds ago       Up 4 seconds                      0.0.0.0:53->53/tcp, 0.0.0.0:80->80/tcp, 0.0.0.0:443->443/tcp, 0.0.0.0:123->123/udp   reverse-proxy-engine
1681814f651e        cturra/ntp          "/bin/sh /opt/startu…"   6 seconds ago       Up 5 seconds (health: starting)   123/udp                                                                              ntp
dde2f9094b45        ubuntu/bind9        "docker-entrypoint.sh"   6 seconds ago       Up 5 seconds                      53/tcp                                                                               DNS-SRV

我可以使用带有的端口80访问浏览器上的nginx网页，但我无法使用相同的IP解析同一网络上的DNS或NTP，但在容器网络中，它是工作的。

所以我认为NGINX端口是向UBUNTU服务器公开的，但是DNS和NTP端口没有公开给NGINX，对吗？我遗漏了什么？

下面是我的NginX配置文件：

events {
  worker_connections 1024;
}

stream {

    upstream dns_servers {
        server DNS-SRV:53;
    }

    upstream ntp_server {
      server ntp:123;
    }

    server {
        listen 53 udp;
        listen 53; #tcp
        proxy_pass dns_servers;
        error_log  /var/log/nginx/dns.log info;
        proxy_responses 1;
        proxy_timeout   1s;
    }

    server {
      listen 123 udp;
      listen 123; #tcp

      proxy_pass ntp_server;
      error_log  /var/log/nginx/ntp.log info;
      proxy_responses 1;
      proxy_timeout   1s;
    }
}

到目前为止，我觉得这是合乎逻辑的，有什么想法吗？

Answer 1

我认为这是因为您没有为bind和ntp容器设置主机名，我使用下面的配置并使其正常工作

version: '3'
services:
  reverse-proxy-engine:
    image: nginx
    container_name: reverse-proxy-engine
    volumes:
      - ~/core/reverse-proxy/:/usr/share/nginx/
      - $PWD/nginx.conf:/etc/nginx/nginx.conf
    ports:
      - "80:80"
      - "443:443"
      - "53:53"
      - "123:123/udp"
    depends_on:
      - "DNS-SRV"
      - "ntp"
  DNS-SRV:
    container_name: DNS-SRV
    hostname: DNS-SRV
    image: ubuntu/bind9
    user: root
    environment:
      - TZ=UTC
    volumes:
      - ~/core/bind9/:/etc/bind/
  ntp:
    image: cturra/ntp
    container_name: ntp
    hostname: ntp
    restart: always
    read_only: true
    tmpfs:
      - /etc/chrony:rw,mode=1750
      - /run/chrony:rw,mode=1750
      - /var/lib/chrony:rw,mode=1750
    environment:
      - NTP_SERVERS=time.cloudflare.com
      - LOG_LEVEL=0

在上面的配置中，我为bind和ntp容器添加了主机名，还安装了nginx配置并替换了默认配置。

下面的nginx.conf配置

user  nginx;
worker_processes  auto;

error_log  /var/log/nginx/error.log notice;
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;

    include /etc/nginx/conf.d/*.conf;
}

stream {

    upstream dns_servers {
        server DNS-SRV:53;
    }

    upstream ntp_server {
      server ntp:123;
    }

    server {
        listen 53 udp;
        listen 53; #tcp
        proxy_pass dns_servers;
        error_log  /var/log/nginx/dns.log info;
        proxy_responses 1;
        proxy_timeout   1s;
    }

    server {
      listen 123 udp;
      listen 123; #tcp

      proxy_pass ntp_server;
      error_log  /var/log/nginx/ntp.log info;
      proxy_responses 1;
      proxy_timeout   1s;
    }
}

注意:确保使用80、443、53、123的绑定端口不被其他应用程序使用。