Docker Swarm - 两个容器之间的通信？

Question

我创建了 docker-compose.yml，它可以在我的计算机（本地）上运行，但不能在服务器（docker swarm、portainer）上运行。容器 nginx 看不到 php-fpm。

docker-compose.yml:

version: "3"

services:
  nginx:
    image: nginx-php-test:8
    ports:
    - "8888:80"
    restart: always
    environment:
    - ROLE=nginx #run nginx

  fpm:
    image: nginx-php-test:8
    environment:
    - ROLE=fpm #run php
    restart: always

在 /etc/nginx/conf.d/default:

...
fastcgi_pass fpm:9000;
...

和 nginx-php-test 的 entrypoint.sh：

#!/bin/bash

if [ "$ROLE" == "nginx" ]; then
    exec /usr/sbin/nginx
elif [ "$ROLE" == "fpm" ]; then
    exec /usr/sbin/php-fpm7.4 -F
fi

如何连接到 fpm 容器？

Answer 1

我找到了解决办法：

version: "3"

services:
  nginx:
    image: nginx-php-test:8
    ports:
    - "8888:80"
    restart: always
    environment:
    - ROLE=nginx #run nginx

  fpm:
    image: nginx-php-test:8
    environment:
    - ROLE=fpm #run php
    restart: always
networks:
    nginx-php:
      driver: overlay