当我想要重建docker镜像时，它会生成一个错误

Question

我制作了docker镜像并使用docker-compose.yml构建它们，第一次一切都很好，但当我在Dockerfiles上添加/更新一些配置并重建镜像时，关于我在镜像中创建的组或用户的错误会生成：

> [ 2/11] RUN addgroup -g 1000 laravel && adduser -G laravel -g laravel -s /bin/sh -D laravel:
#5 0.396 addgroup: group 'laravel' in use

在这里，我添加了laravel作为用户和组。

我唯一的解决办法是删除所有构建的图像：docker system prune -a

以下是Docker文件和docker-compose.yml文件配置：

.env文件：

PROJECT_NAME=myproject
DEV_DOMAIN=docker.local
USERNAME=laravel
UID=1000
PHP_VERSION=7.4-fpm-alpine
MYSQL_VERSION=latest
MYSQL_DATABASE=local_db
MYSQL_USER=homestead
MYSQL_PASSWORD=secret
XDEBUG_REMOTE_HOST=172.31.33.213
XDEBUG_IDE_KEY=VSCODE
XDEBUG_PORT=7765

docker-compose.yml:

version: "3.5"
services:
nginx:
build:
args:
user: ${USERNAME}
uid: ${UID}
context: .
dockerfile: ./docker/nginx/Dockerfile
image: "nginx:stable-alpine"
container_name: ${PROJECT_NAME}-nginx
ports:
- 80:80
volumes:
- "./code:/var/www/html"
- "./docker/nginx/vhost:/etc/nginx/conf.d/default.conf"
- "./docker/nginx/nginx.conf:/etc/nginx/nginx.conf"
depends_on:
- php
- mysql
networks:
- devproject
php:
build:
args:
PHP_VERSION: ${PHP_VERSION}
user: ${USERNAME}
uid: ${UID}
XDEBUG_REMOTE_HOST: ${XDEBUG_REMOTE_HOST}
XDEBUG_IDE_KEY: ${XDEBUG_IDE_KEY}
XDEBUG_PORT: ${XDEBUG_PORT}
context: .
dockerfile: ./docker/php/Dockerfile
image: php:${PHP_VERSION}
container_name: ${PROJECT_NAME}-php
volumes:
- "./code:/var/www/html"
- "./docker/php/www.conf:/usr/local/etc/php-fpm.d/www.conf"
ports:
- 9000:9000
networks:
- devproject
mysql:
image: mysql:${MYSQL_VERSION}
container_name: ${PROJECT_NAME}-mysql
restart: unless-stopped
tty: true
ports:
- 3306:3306
environment:
MYSQL_DATABASE: ${MYSQL_DATABASE}
MYSQL_USER: ${MYSQL_USER}
MYSQL_PASSWORD: ${MYSQL_PASSWORD}
MYSQL_ROOT_PASSWORD: ${MYSQL_PASSWORD}
SERVICE_TAGS: dev
SERVICE_NAME: mysql
volumes:
- devprojectmysql:/var/lib/mysql
networks:
- devproject
networks:
devproject:
driver: bridge
volumes:
devprojectmysql:
driver: local

docker/php/Dockerfile:

ARG PHP_VERSION
FROM php:$PHP_VERSION
ARG XDEBUG_REMOTE_HOST
ARG XDEBUG_IDE_KEY
ARG XDEBUG_PORT
ARG user
ARG uid
ENV XDEBUG_REMOTE_HOST $XDEBUG_REMOTE_HOST
ENV XDEBUG_IDE_KEY $XDEBUG_IDE_KEY
ENV XDEBUG_PORT $XDEBUG_PORT
RUN addgroup -g $uid $user && adduser -G $user -g $user -s /bin/sh -D $user
RUN mkdir -p /var/www/html
RUN chown $user:$user /var/www/html
WORKDIR /var/www/html
RUN apk add --no-cache --update icu-dev gettext gettext-dev git curl libpng-dev libzip-dev 
libmcrypt-dev libpng-dev libjpeg-turbo-dev libxml2-dev icu-dev postgresql-dev curl-dev 
libmemcached-dev build-base autoconf zip unzip oniguruma-dev &&
apk add --update --virtual build-dependencies build-base gcc wget autoconf
RUN pecl install xdebug-3.0.4
RUN docker-php-ext-install gd ctype fileinfo mysqli pdo pdo_mysql mbstring exif pcntl bcmath xml curl json intl gettext tokenizer zip simplexml
RUN docker-php-ext-configure intl &&
docker-php-ext-configure gettext &&
docker-php-ext-enable xdebug
RUN apk del build-dependencies &&
rm -rf /var/cache/apk/* &&
rm -rf /var/lib/apt/lists/*
RUN echo "xdebug.remote_autostart=1" >> /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini 
&& echo "xdebug.remote_enable=1" >> /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini 
&& echo "xdebug.remote_handler=dbgp" >> /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini 
&& echo "xdebug.remote_connect_back=0" >> /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini 
&& echo "xdebug.remote_log=/tmp/xdebug_remote.log" >> /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini 
&& echo "xdebug.remote_port=$XDEBUG_PORT" >> /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini 
&& echo "xdebug.idekey=$XDEBUG_IDE_KEY" >> /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini 
&& echo "xdebug.remote_host=$XDEBUG_REMOTE_HOST" >> /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini

docker/nginx/Dockerfile:

FROM nginx:stable-alpine
# Arguments defined in docker-compose.yml
ARG user
ARG uid
RUN mkdir -p /var/www/html
RUN addgroup -g $uid $user && adduser -G $user -g $user -s /bin/sh -D $user
RUN chown $user:$user /var/www/html

Answer 1

compose文件中的图像字段，例如

image: php:${PHP_VERSION}

是您正在创建的图像。您已将创建的图像命名为与Dockerfile中的基本图像相同的图像，从而覆盖上游名称。这是撰写文件中的一个错误，其他人会感到困惑，因为运行具有该名称的映像会根据您是提取上游映像还是运行本地构建的映像而执行不同的操作。

相反，您的compose文件应该在您自己的注册表命名空间中使用一些东西来命名图像，以避免冲突。在Hub中，包括准备您的Hub用户名：

image: <hubuser>/<appname>:<tag>