AWS ECS Docker - nginx: [emerg] 在上游找不到主机

Question

我正在尝试运行 php + mysql 应用程序与 AWS ECS 使用 docker。应用程序堆栈由 mysql、elk、php-fpm 和 nginx docker 容器组成。这些容器都运行在同一台 docker 机器上。当任务启动时，nginx 容器退出并出现以下错误： nginx: [emerg] host not found in upstream "php:9001" in /etc/nginx/conf.d/upstream.conf:1 .

Nginx Dockerfile:

FROM alpine:3.4

RUN apk add --update nginx

#Clear Cache and Temp Data
RUN rm -rf /var/cache/apk/* && rm -rf /tmp/*

ADD nginx.conf /etc/nginx/
ADD symfony.conf /etc/nginx/conf.d/

RUN echo "upstream php-upstream { server php:9001; }" > /etc/nginx/conf.d/upstream.conf

RUN adduser -D -g '' -G www-data www-data

CMD ["nginx"]

EXPOSE 80
EXPOSE 443

RUN echo "upstream php-upstream { server php:9001; }" > /etc/nginx/conf.d/upstream.conf

php:9001 部分引用了在 AWS ECS 任务定义中定义的 php 容器。

nginx.conf:

user www-data;
worker_processes 4;
pid /run/nginx.pid;

events {
  worker_connections  2048;
  multi_accept on;
  use epoll;
}

http {
  server_tokens off;
  sendfile on;
  tcp_nopush on;
  tcp_nodelay on;
  keepalive_timeout 15;
  types_hash_max_size 2048;
  include /etc/nginx/mime.types;
  default_type application/octet-stream;
  access_log off;
  error_log off;
  gzip on;
  gzip_disable "msie6";
  include /etc/nginx/conf.d/*.conf;
  include /etc/nginx/sites-enabled/*;
  open_file_cache max=100;
}

daemon off;

symfony.conf:

server {
    server_name _;
    root /var/www/symfony/web;

    location / {
        try_files $uri @rewriteapp;
    }

    location @rewriteapp {
        rewrite ^(.*)$ /app.php/ last;
    }

    location ~ ^/(app|app_dev|config)\.php(/|$) {
        fastcgi_pass php-upstream;
        fastcgi_split_path_info ^(.+\.php)(/.*)$;
        include fastcgi_params;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param HTTPS off;
    }

    error_log /var/log/nginx/symfony_error.log;
    access_log /var/log/nginx/symfony_access.log;
}

/etc/php7/php-fpm.conf:

[symfony]
user = nobody
group = nobody
listen = 0.0.0.0:9001
pm = dynamic
pm.max_children = 1000
pm.start_servers = 1
pm.min_spare_servers = 1
pm.max_spare_servers = 3
env[DB_1_ENV_MYSQL_DATABASE] = $DB_1_ENV_MYSQL_DATABASE
env[DB_1_ENV_MYSQL_USER] = $DB_1_ENV_MYSQL_USER
env[DB_1_ENV_MYSQL_PASSWORD] = $DB_1_ENV_MYSQL_PASSWORD
catch_workers_output = yes

我还尝试根据对 nginx 配置的更改来更改监听 listen = /var/run/php-fpm/php-fpm.sock 或 listen = 127.0.0.1:9001，但这导致了其他各种错误消息。

Answer 1

我没有在 php 和 nginx 容器之间的 AWS ECS 任务定义中设置 links。

要为容器设置 link，请转到 NETWORK SETTINGS，然后在 Links 字段中输入 link。

Answer 2

正如@OnurDemir 所说，当您的网络模式为 awsvpc - "networkMode": "awsvpc",.

时，您不能使用 links

使用这种网络模式，您可以仅使用名称来调用容器。

任务-definition.json

{
    "family": "app-backend",
    "containerDefinitions": [
        {
            "name": "nginx",
            "image": "my-url-to-the-docker-image",
            "portMappings": [
                {
                    "containerPort": 80,
                    "hostPort": 80,
                    "protocol": "tcp"
                }
            ],
            "dependsOn": [
                {
                    "containerName": "php-fpm",
                    "condition": "START"
                }
            ],
            "essential": true
        },
        {
            "name": "php-fpm",
            "image": "my-url-to-the-docker-image",
            "portMappings": [
                {
                    "containerPort": 9000
                }
            ],
            "essential": true
        }
    ],
    "executionRoleArn": "ecsTaskExecutionRole",
    "cpu": "1024",
    "memory": "2048",
    "networkMode": "awsvpc"
}

在这里你可以看到：

nginx 容器dependsOnphp-fpm 容器。
当你想引用 php-fpm 中的容器时，f.前任。 nginx 中的一个 vhost 文件，你可以通过它的名字来调用它 php-fpm.

示例 1：fastcgi_pass php-fpm:9000;

另一种方法，当使用 AWS Fargate 时，您可以只调用环回 127.0.0.1 或 localhost。 Described in some AWS blog 当使用 awsvpc 时，容器间连接就像所有容器都在同一台机器上一样，即使它们是单独的容器。

示例 2：fastcgi_pass 127.0.0.1:9000;

AWS ECS Docker - nginx: [emerg] 在上游找不到主机

AWS ECS Docker - nginx: [emerg] host not found in upstream

php

nginx

amazon-web-services

amazon-ecs

docker