DOCKER04_详解Dockerfile基本指令、FROM、LABEL、RUN、CMD、ENTRYPOINT、ARG、ENV、VOLUME、USER（七）

# 这是我的第一个dockerfile镜像
FROM alpine
# 相当于给当前容器开一个用户,以后的命令可以用这个用户运行 有可能没有执行权限
# 容器中的ROOT虽然不是lunux宿主机的真实root,但是可以改掉这个镜像的所有
USER 1000:1000
# 不自动解压
# 以linux主机的用户为准,默认是root用户,如果我们不指定权限将复制失败
COPY --chown=1000:1000 *.txt /a.txt
# RUN 指令上下并没有上下文关系
RUN  ls -l

[root@i-id8g0yu9 ~]# docker build --no-cache -t dockerfileworkuser:v1 -f dockerfileUSER .
Sending build context to Docker daemon  2.473MB
Step 1/4 : FROM alpine
 ---> 6dbb9cc54074
Step 2/4 : USER 1000:1000
 ---> Running in 7d4fd2b2a54c
Removing intermediate container 7d4fd2b2a54c
 ---> 2561ad4ce2c2
Step 3/4 : COPY --chown=1000:1000 *.txt /a.txt
 ---> a21c8da0fb0c
Step 4/4 : RUN  ls -l
 ---> Running in c9cbef9eac65
total 12
-rw-r--r--    1 1000     1000             5 Apr 18 13:46 a.txt
drwxr-xr-x    2 root     root          4096 Apr 14 10:25 bin
drwxr-xr-x    5 root     root           340 Apr 18 14:22 dev
drwxr-xr-x    1 root     root            66 Apr 18 14:22 etc
drwxr-xr-x    2 root     root             6 Apr 14 10:25 home
drwxr-xr-x    7 root     root           247 Apr 14 10:25 lib
drwxr-xr-x    5 root     root            44 Apr 14 10:25 media
drwxr-xr-x    2 root     root             6 Apr 14 10:25 mnt
drwxr-xr-x    2 root     root             6 Apr 14 10:25 opt
dr-xr-xr-x  115 root     root             0 Apr 18 14:22 proc
drwx------    2 root     root             6 Apr 14 10:25 root
drwxr-xr-x    2 root     root             6 Apr 14 10:25 run
drwxr-xr-x    2 root     root          4096 Apr 14 10:25 sbin
drwxr-xr-x    2 root     root             6 Apr 14 10:25 srv
dr-xr-xr-x   13 root     root             0 Apr 18 12:58 sys
drwxrwxrwt    2 root     root             6 Apr 14 10:25 tmp
drwxr-xr-x    7 root     root            66 Apr 14 10:25 usr
drwxr-xr-x   12 root     root           137 Apr 14 10:25 var
Removing intermediate container c9cbef9eac65
 ---> db89e3d275a2
Successfully built db89e3d275a2
Successfully tagged dockerfileworkuser:v1
[root@i-id8g0yu9 ~]# 

# 最终版本
FROM maven:3.5.2-jdk-8-slim AS buildapp
WORKDIR /app
COPY src .
COPY pom.xml .
RUN mvn clean package
RUN cp target/*.jar app.jar
RUN ls -l
FROM openjdk:8u282-slim
RUN ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && echo 'Asia/Shanghai' >/etc/timezone
LABEL maintainer="845195485@qq.com"
COPY --from=buildapp /app/app.jar /app.jar
# COPY demo-0.0.1-SNAPSHOT.jar /app.jar
EXPOSE 8080
# CMD ["--server.prot=8080"]
ENV JAVA_OPTS=""
ENV PARAMS=""
ENTRYPOINT [ "sh", "-c", "java -Djava.security.egd=file:/dev/./urandom $JAVA_OPTS -jar /app.jar $PARAMS" ]