如何使多个docker化的PHP-FPM和Nginx应用程序在同一网络上相互通信

xcvxvxc
364 阅读2分钟

在这个例子中，我们将建立两个docker化的PHP-FPM和Nginx应用程序（"前端 "和 "后端"），并允许它们在同一网络上相互通信。这里有三个关键点。

  • 在两个项目的".env "文件中把COMPOSE_PROJECT_NAME 设为inanzzz 。这将创建一个名为inanzzz_default 的网络，并将两个项目的容器放入其中，这样它们就可以互相通信了。

  • 两个项目的nginx端口转发应该在 "docker-compose.yml "文件中不同，例如：8081 和8082 。

  • 在 "docker-compose.yml "文件中，两个项目的服务名称应该是不同的，例如：frontend_php 和backend_php 等等。

结构

正如你在下面看到的，为了简单起见，结构保持不变。

前端

$ tree
.
├── docker
│   ├── .env
│   ├── docker-compose.yml
│   ├── nginx
│   │   ├── app.conf
│   │   └── Dockerfile
│   └── php
│       ├── Dockerfile
│       └── www.conf
├── index.html
└── index.php

后台

$ tree
.
├── docker
│   ├── .env
│   ├── docker-compose.yml
│   ├── nginx
│   │   ├── app.conf
│   │   └── Dockerfile
│   └── php
│       ├── Dockerfile
│       └── www.conf
├── index.html
└── index.php

前台文件

index.html

Success: HTML page (Frontend)

index.php

echo 'Success: PHP page (Frontend)'.PHP_EOL;
 
//echo file_get_contents('http://backend_nginx');
//echo file_get_contents('http://backend_nginx/index.php').PHP_EOL;

docker/.env

COMPOSE_PROJECT_NAME=inanzzz
REPOSITORY_NAME=frontend
IMAGE_TAG=latest

docker/docker-compose.yml

version: "3"
 
services:
 
  frontend_php:
    build:
      context: ./php
    image: "${COMPOSE_PROJECT_NAME}/${REPOSITORY_NAME}_php:${IMAGE_TAG}"
    container_name: "${REPOSITORY_NAME}_php"
    hostname: "${REPOSITORY_NAME}-php"
    volumes:
      - ..:/app:cached
      - ./php/www.conf:/usr/local/etc/php-fpm.d/www.conf:cached
    working_dir: /app
 
  frontend_nginx:
    build:
      context: ./nginx
    image: "${COMPOSE_PROJECT_NAME}/${REPOSITORY_NAME}_nginx:${IMAGE_TAG}"
    container_name: "${REPOSITORY_NAME}_nginx"
    hostname: "${REPOSITORY_NAME}-nginx"
    ports:
      - "8081:80"
    volumes:
      - ..:/app:cached
      - ./nginx/app.conf:/etc/nginx/conf.d/default.conf:cached
    depends_on:
      - frontend_php

docker/php/www.conf

[www]
 
user = www-data
group = www-data
 
listen = frontend_nginx:9000
 
pm = dynamic
pm.max_children = 40
pm.start_servers = 2
pm.min_spare_servers = 2
pm.max_spare_servers = 4
pm.max_requests = 500

docker/php/Dockerfile

FROM php:7.2-fpm-alpine
 
ENV PS1="\u@\h:\w\\$ "
 
RUN apk add --no-cache bash
 
CMD ["php-fpm"]

docker/nginx/app.conf

server {
    listen 80 default_server;
 
    server_name frontend.com www.frontend.com;
 
    root /app;
 
    location ~ \.php$ {
        try_files $uri =404;
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_pass frontend_php:9000;
        fastcgi_index index.php;
        include fastcgi_params;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param PATH_INFO $fastcgi_path_info;
    }
 
    error_log /var/log/nginx/app_error.log;
    access_log /var/log/nginx/app_access.log;
}

docker/nginx/Dockerfile

FROM nginx:1.15-alpine
 
ENV PS1="\u@\h:\w\\$ "
 
RUN apk add --no-cache bash

后台文件

index.html

Success: HTML page (Backend)

index.php

echo 'Success: PHP page (Backend)'.PHP_EOL;
 
//echo file_get_contents('http://frontend_nginx');
//echo file_get_contents('http://frontend_nginx/index.php').PHP_EOL;

docker/.env

COMPOSE_PROJECT_NAME=inanzzz
REPOSITORY_NAME=backend
IMAGE_TAG=latest

docker/docker-compose.yml

version: "3"
 
services:
 
  backend_php:
    build:
      context: ./php
    image: "${COMPOSE_PROJECT_NAME}/${REPOSITORY_NAME}_php:${IMAGE_TAG}"
    container_name: "${REPOSITORY_NAME}_php"
    hostname: "${REPOSITORY_NAME}-php"
    volumes:
      - ..:/app:cached
      - ./php/www.conf:/usr/local/etc/php-fpm.d/www.conf:cached
    working_dir: /app
 
  backend_nginx:
    build:
      context: ./nginx
    image: "${COMPOSE_PROJECT_NAME}/${REPOSITORY_NAME}_nginx:${IMAGE_TAG}"
    container_name: "${REPOSITORY_NAME}_nginx"
    hostname: "${REPOSITORY_NAME}-nginx"
    ports:
      - "8081:80"
    volumes:
      - ..:/app:cached
      - ./nginx/app.conf:/etc/nginx/conf.d/default.conf:cached
    depends_on:
      - backend_php

docker/php/www.conf

[www]
 
user = www-data
group = www-data
 
listen = backend_nginx:9000
 
pm = dynamic
pm.max_children = 40
pm.start_servers = 2
pm.min_spare_servers = 2
pm.max_spare_servers = 4
pm.max_requests = 500

docker/php/Dockerfile

FROM php:7.2-fpm-alpine
 
ENV PS1="\u@\h:\w\\$ "
 
RUN apk add --no-cache bash
 
CMD ["php-fpm"]

docker/nginx/app.conf

server {
    listen 80 default_server;
 
    server_name backend.com www.backend.com;
 
    root /app;
 
    location ~ \.php$ {
        try_files $uri =404;
        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_pass backend_php:9000;
        fastcgi_index index.php;
        include fastcgi_params;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_param PATH_INFO $fastcgi_path_info;
    }
 
    error_log /var/log/nginx/app_error.log;
    access_log /var/log/nginx/app_access.log;
}

docker/nginx/Dockerfile

FROM nginx:1.15-alpine
 
ENV PS1="\u@\h:\w\\$ "
 
RUN apk add --no-cache bash

构建

前台

frontend/docker$ docker-compose up -d
Creating network "inanzzz_default" with the default driver
Building frontend_php
Successfully tagged inanzzz/frontend_php:latest
Building frontend_nginx
Successfully tagged inanzzz/frontend_nginx:latest
Creating frontend_php ... done
Creating frontend_nginx ... done

后台

backend/docker$ docker-compose up -d
Creating network "inanzzz_default" with the default driver
Building backend_php
Successfully tagged inanzzz/backend_php:latest
Building backend_nginx
Successfully tagged inanzzz/backend_nginx:latest
Creating backend_php ... done
Creating backend_nginx ... done

验证

图片

$ docker images
REPOSITORY               TAG                 IMAGE ID            CREATED              SIZE
inanzzz/backend_nginx    latest              e96f12e76433        About a minute ago   21.6MB
inanzzz/frontend_nginx   latest              e96f12e76433        About a minute ago   21.6MB
inanzzz/backend_php      latest              cec808e6aa5c        About a minute ago   79.5MB
inanzzz/frontend_php     latest              cec808e6aa5c        About a minute ago   79.5MB
nginx                    1.15-alpine         63356c558c79        10 days ago          17.8MB
php                      7.2-fpm-alpine      9966b8ea0bdc        3 weeks ago          78.1MB

容器

$ docker ps
CONTAINER ID        IMAGE                           COMMAND                  PORTS                  NAMES
fdd64ac7a7cb        inanzzz/backend_nginx:latest    "nginx -g 'daemon of…"   0.0.0.0:8082->80/tcp   backend_nginx
45e99c7b3e26        inanzzz/backend_php:latest      "docker-php-entrypoi…"   9000/tcp               backend_php
0eacaa22ff8f        inanzzz/frontend_nginx:latest   "nginx -g 'daemon of…"   0.0.0.0:8081->80/tcp   frontend_nginx
3d2e0c42e47f        inanzzz/frontend_php:latest     "docker-php-entrypoi…"   9000/tcp               frontend_php

网络

$ docker network ls
NETWORK ID          NAME                DRIVER              SCOPE
b16749701349        inanzzz_default     bridge              local

$ docker inspect inanzzz_default 
[
    {
        "Name": "inanzzz_default",
        "IPAM": {
            "Driver": "default",
            "Options": null,
            "Config": [
                {
                    "Subnet": "192.168.112.0/20",
                    "Gateway": "192.168.112.1"
                }
            ]
        },
        "Containers": {
            "0eacaa22ff8fad197b94acdfd6abcdab25a782065fc8551996b008603b380dc3": {
                "Name": "frontend_nginx",
                "IPv4Address": "192.168.112.3/20"
            },
            "3d2e0c42e47fda99ada7f53414130fff35b0f4e708d8ce83e55d564ef3e4f81e": {
                "Name": "frontend_php",
                "IPv4Address": "192.168.112.2/20"
            },
            "45e99c7b3e26669f6c50479ba50982a9b1e9aa230d03595ebd44d251734c5272": {
                "Name": "backend_php",
                "IPv4Address": "192.168.112.4/20"
            },
            "fdd64ac7a7cbcce6be75f0f3da3746496aac09ceb553279fd6485c5cc9ade1a5": {
                "Name": "backend_nginx",
                "IPv4Address": "192.168.112.5/20"
            }
        },
        "Labels": {
            "com.docker.compose.network": "default",
            "com.docker.compose.project": "inanzzz"
        }
    }
]

容器bash提示

$ docker exec -it backend_php bash
root@backend-php:/app#
 
$ docker exec -it backend_nginx bash
root@backend-nginx:/# 
 
$ docker exec -it frontend_php bash
root@frontend-php:/app#
 
$ docker exec -it frontend_nginx bash
root@frontend-nginx:/#

测试

静态的前台调用：

$ curl http://localhost:8081 # or /index.html
Success: HTML page (Frontend)

静态后端调用：

$ curl http://localhost:8082 # or /index.html
Success: HTML page (Backend)

前端消耗后端：

$ curl http://localhost:8081/index.php
Success: HTML page (Backend)
Success: PHP page (Backend)

后端消耗前端：

$ curl http://localhost:8082/index.php
Success: HTML page (Frontend)
Success: PHP page (Frontend)
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