我正在尝试运行执行maven构建的docker构建。
这是我的Dockerfile：
FROM maven:3.5.4-jdk-8-slim
COPY * /myapp/src/
WORKDIR /myapp/src/
RUN mvn clean package
RUN ls -la target
RUN ls -la ./target
COPY ./target/myapp.jar ../
COPY config.yml ../
WORKDIR /myapp/
CMD ["java", "-jar", "myapp.jar"]
我收到的问题是
COPY failed: stat /var/snap/docker/common/var-lib-docker/tmp/docker-builder185918822/target/myapp.jar: no such file or directory
我添加了两个ls语句用于调试，这是输出：
...
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 01:27 min
[INFO] Finished at: 2018-10-30T13:59:42Z
[INFO] ------------------------------------------------------------------------
Removing intermediate container 5c0f369c5f9d
---> d2b36b5070e3
Step 5/10 : RUN ls -la target
---> Running in 4de6062b1573
total 19104
drwxr-xr-x 4 root root 4096 Oct 30 13:59 .
drwxr-xr-x 5 root root 4096 Oct 30 13:59 ..
drwxr-xr-x 2 root root 4096 Oct 30 13:59 classes
drwxr-xr-x 2 root root 4096 Oct 30 13:59 maven-archiver
-rw-r--r-- 1 root root 19538983 Oct 30 13:59 myapp.jar
-rw-r--r-- 1 root root 3294 Oct 30 13:59 original-myapp.jar
Removing intermediate container 4de6062b1573
---> 47f4a7534ffb
Step 6/10 : RUN ls -la ./target
---> Running in 55c68b1fbbe9
total 19104
drwxr-xr-x 4 root root 4096 Oct 30 13:59 .
drwxr-xr-x 5 root root 4096 Oct 30 13:59 ..
drwxr-xr-x 2 root root 4096 Oct 30 13:59 classes
drwxr-xr-x 2 root root 4096 Oct 30 13:59 maven-archiver
-rw-r--r-- 1 root root 19538983 Oct 30 13:59 myapp.jar
-rw-r--r-- 1 root root 3294 Oct 30 13:59 original-myapp.jar
Removing intermediate container 55c68b1fbbe9
---> bbc8a395474c
Step 7/10 : COPY ./target/myapp.jar ../
COPY failed: stat /var/snap/docker/common/var-lib-docker/tmp/docker-builder185918822/target/myapp.jar: no such file or directory
从两个ls命令的输出中可以看到，jar文件在那里。为什么Docker无法找到它？