docker上的Nginx，curl获取连接被拒绝

Question

我正在使用 docker 在本地环境中工作。 我有一个 nginx web 容器和一个 php 容器，它们在同一个网络中。

我从自己的 dockerfile 构建 php 容器（使用 phpfpm 和 phpcli）；并且，我在 docker-compose 中从nginx:stable 集线器图像中编写了 nginx。

我有 2 个项目：一个 symfony(http://i-r4y.kaiza.lh/) 和一个在其中运行的 drupal(http://i-z4r4.kaiza.lh/)。 symfony 公开了一个 api，drupal 必须使用它。问题是当我从drupal cURL error 7: Failed to connect to i-r4y.kaiza.lh port 80: Connection refused调用symfony 时出错

我以为是symfony侧api路由的配置；喜欢它必须是公开的或接受 CORS 等...

但是当我进入 bash 在 php 容器中，并且我卷曲了 symfony 或 drupal url 时，我遇到了同样的错误。

app@kz-php74:/var/www$ curl http://i-r4y.kaiza.lh
curl: (7) Failed to connect to i-r4y.kaiza.lh port 80: Connection refused
app@kz-php74:/var/www$ curl http://i-z4r4.kaiza.lh
curl: (7) Failed to connect to i-z4r4.kaiza.lh port 80: Connection refused

我在 php 容器中检查了主机是否存在于/etc/hosts

app@kz-php74:/var/www$ cat /etc/hosts | grep i-
127.0.0.1   i-r4y.kaiza.lh
127.0.0.1   i-z4r4.kaiza.lh

这里是 docker-compose.yml ：

version: '2.4'

services:
  php7.4:
    build:
      context: ../../../dockerfile
      dockerfile: Dockerfile.php
      args:
        PHP_VERSION: 7.4
    container_name: "kz-php74"
    hostname: "kz-php74"
    user: 1000:1000
    working_dir: /var/www
    volumes:
      - "${LOCAL_PATH}/../www:/var/www"
    extra_hosts:
      - "i-r4y.kaiza.lh:127.0.0.1"
      - "i-z4r4.kaiza.lh:127.0.0.1"
    networks:
      - kz_local

  mysql:
    container_name: kz-mysql
    image: mariadb:10.4.0
    volumes:
      - ${LOCAL_PATH}/.data/mariadb:/var/lib/mysql
      - ${LOCAL_PATH}/config/mariadb/conf.d/custom.cnf:/etc/mysql/conf.d/custom.cnf
      - ${LOCAL_PATH}/../www:/var/www
    ports:
      - ${MYSQL_PORT:-3306}:3306
    environment:
      MYSQL_ROOT_PASSWORD: password
    networks:
      - kz_local

  web:
    image: nginx:stable
    container_name: kz-web
    volumes:
      - ${LOCAL_PATH}/config/nginx/conf.d:/etc/nginx/conf.d
      - ${LOCAL_PATH}/../www:/var/www
    ports:
      - 80:80
    networks:
      - kz_local

networks:
  kz_local:
    external: true

drupal的nginx配置：

server {
    listen 80;
    listen [::]:80;
    server_name i-z4r4.kaiza.lh;

    root /var/www/i-z4r4/web;

    resolver 127.0.0.11 ipv6=off;
    
    location @rewrite {
        rewrite ^/(.*)$ /index.php?q=$1;
    }

    # In Drupal 8, we must also match new paths where the '.php' appears in
    # the middle, such as update.php/selection. The rule we use is strict,
    # and only allows this pattern with the update.php front controller.
    # This allows legacy path aliases in the form of
    # blog/index.php/legacy-path to continue to route to Drupal nodes. If
    # you do not have any paths like that, then you might prefer to use a
    # laxer rule, such as:
    #   location ~ \.php(/|$) {
    # The laxer rule will continue to work if Drupal uses this new URL
    # pattern with front controllers other than update.php in a future
    # release.
    location ~ '\.php$|^/update.php' {
        set $fastcgi_pass "kz-php74:9000";

        fastcgi_split_path_info ^(.+?\.php)(|/.*)$;
        # Security note: If you're running a version of PHP older than the
        # latest 5.3, you should have "cgi.fix_pathinfo = 0;" in php.ini.
        # See http://serverfault.com/q/627903/94922 for details.
        include fastcgi_params;
        # Block httpoxy attacks. See https://httpoxy.org/.
        fastcgi_param HTTP_PROXY "";
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param PATH_INFO $fastcgi_path_info;
        fastcgi_param QUERY_STRING $query_string;
        fastcgi_intercept_errors on;
        fastcgi_pass $fastcgi_pass;
    }

  ...

    upstream php {
        server kz-php74:8080;
    }
}

对于 symfony：

server {
    listen 80;
    listen [::]:80;
    server_name i-r4y.kaiza.lh;

    root /var/www/i-r4y/public;

    resolver 127.0.0.11 ipv6=off;

    location / {
        # try to serve file directly, fallback to index.php
        try_files $uri /index.php$is_args$args;
    }

    location ~ ^/index\.php(/|$) {
        set $fastcgi_pass "kz-php74:9000";

        fastcgi_pass $fastcgi_pass;
        fastcgi_split_path_info ^(.+\.php)(/.*)$;
        include fastcgi_params;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param HTTPS on;
    }

    location @rewriteapp {
        rewrite ^(.*)$ /app.php/$1 last;
    }
...
    upstream php {
        server kz-php74:8080;
    }
...
}

有人知道为什么这不起作用吗？

谢谢

Answer 1

您需要将端口 80 暴露给您的 docker 主机。

看起来您正试图从 docker 主机（运行 docker 的真实机器）卷曲到在 docker 容器中运行的 nginx。

您可以在 docker-compose 中执行以下操作：

web:
  image: nginx:stable
  …
  ports: 
    - 80:80

这将使您进入 nginx。但是，您的下一个障碍可能是 ngxinx 访问您的 php 服务。

就像@AmyDev 提到的那样，使用 docker 的名称解析会更好地为您服务。

在您的 nginx 配置中，您需要以下行将 nginx 指向 docker 的内部 DNS：

resolver 127.0.0.11 ipv6=off;

然后您可以使用以下内容声明您的upstream：

upstream php {
    # use the docker service name. I removed the . b/c I don't know if that works in a docker service name
    # This assumes the docker service has been renamed from php7.4 to php74 in docker-compose.yml
    server php74:8080; # or whatever port to which php is listening
}

Answer 2

当您运行 curl http://i-r4y.kaiza.lh 时，您向同一个容器 (php7.4) 发出请求，而不是在 web (nginx) 上。如果要向其他容器发起请求，可以使用容器服务名作为域。

尝试在 php 容器中运行curl http://web

Answer 3

我通过在 web 容器的网络中添加一个别名解决了这个问题，我可以通过该别名从 php 容器访问。

...
  web:
    image: nginx:stable
    ....
    networks:
      kz_local:
        # To allow fetch (call, curl) from php container.
        aliases:
          - api.i-r4y.kaiza.lh
          - api.i-z4r4.kaiza.lh
...

当然，我需要在配置 nginx 中添加 url 别名：

...
server_name i-z4r4.kaiza.lh api.i-z4r4.kaiza.lh;
...