本文已参与「新人创作礼」活动，一起开启掘金创作之路。
Dockerfile 多阶段构建参数传递
dockerfile
ARG SVC1
ARG SVC2
##### BUILD STAGE
FROM mcr.microsoft.com/dotnet/sdk:3.1 AS BUILD
ARG SVC1
WORKDIR /workspace
RUN mkdir ${SVC1}
##### RUN STAGE
FROM mcr.microsoft.com/dotnet/aspnet:3.1
ARG SVC2
ENV SVC2=${SVC2}
COPY --from=BUILD /workspace /workspace
WORKDIR /workspace
RUN mkdir ${SVC2}
- ARG 声明传入的参数
- FROM 分隔了不同的构建阶段
- 不同构建阶段必须先声明 ARG 后才能使用
ARG SVC FROM mcr.microsoft.com/dotnet/sdk:3.1 AS BUILD ARG SVC ... FROM mcr.microsoft.com/dotnet/aspnet:3.1 ARG SVC ...
COPY --from=BUILD从 BUILD 阶段拷贝
docker build 构建镜像
docker build -t test --build-arg SVC1="text1" --build-arg SVC2="text2" .
通过
--build-arg KEY="VAL"传入参数
docker run 启动容器并进入shell
[root@localhost ~]# docker run -it test /bin/bash
检查容器查看结果
检查目录是否被创建
root@0cc3f0c70904:/workspace# ls
text1 text2 ##### BUILD STAGE & RUN STAGE 创建的东西都在
检查环境变量是否被创建
root@0cc3f0c70904:/workspace# env
HOSTNAME=0cc3f0c70904
ASPNETCORE_URLS=http://+:80
PWD=/workspace
HOME=/root
TERM=xterm
SHLVL=1
SVC2=text2 ##### 环境变量OK
DOTNET_RUNNING_IN_CONTAINER=true
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
_=/usr/bin/env
