Hello.java

Dockerfile

FROM java:8
COPY . /var/www/java  
WORKDIR /var/www/java  
RUN javac Hello.java  
CMD ["java", "Hello"]



# java:8
FROM openjdk:8-jre-alpine
ADD HelloApp.java /demo/HelloApp.java
ADD HelloApp.class /demo/
WORKDIR /demo/
# openjdk:8-jre-alpine  no javac
# RUN javac HelloApp.java
# CMD VS ENTRYPOINT
CMD ["java", "HelloApp"]




COPY 拷贝文件或目录到镜像中，用法同ADD，只是不支持自动下载和解压 

openjdk:8-jre-alpine  没有 javac

docker build -t helloapp:v1 .

docker images
REPOSITORY   TAG       IMAGE ID       CREATED          SIZE
helloapp     v1        3d705a162ac8   13 minutes ago   83.4MB

docker run --name helloappv1 helloapp:v1

传递环境变量
docker run --name helloappv1 -it  -e envvalue1="envvalue1_hello" helloapp:v1

System.getenv("envvalue1")

docker run --name helloappv1 -d helloapp:v1
-d 后台运行

docker stop helloappv1

docker exec -it helloappv1 /bin/sh
Error response from daemon: Container 32d57cb8e7cda7681ee2d406147e736ffdcc781df1a2cd31b6078b68e492f84a is not running

dockefile中 使用 CMD ，没有用 ENTRYPOINT
/bin/sh 命令替换 CMD 中 的 java HelloApp
docker run --name helloappv1 -it helloapp:v1 /bin/sh
进入容器
top
java HelloApp

docke rm helloappv1 -f



完整例子

https://gitee.com/dyyx/hellocode/tree/master/demo/springboot-docker-demo/docs/helloapp


 springboot应用打docker镜像  
 dockerfile 写法   
 docker命令实战