OCI错误“/ opt / docker / bin / my_job”：没有使用sbt docker的这样的文件或目录：publishLocal

Question

如果您使用sbt docker:publishLocal从scala项目构建docker镜像，您将看到以下行打印出来：

[info] Packaging /home/user123/myUser/repos/my_job/target/scala-2.12/app_internal_2.12-0.1.jar ...
[info] Done packaging.
[info] Sending build context to Docker daemon  129.7MB
[info] Step 1/7 : FROM openjdk:11-jre
[info]  ---> 8c8b7f0ab84c
[info] Step 2/7 : LABEL MAINTAINER="[email protected]"
[info]  ---> Using cache
[info]  ---> d5caf9a92999
[info] Step 3/7 : WORKDIR /opt/docker
[info]  ---> Using cache
[info]  ---> d887eeb10e8e
[info] Step 4/7 : ADD --chown=root:root opt /opt
[info]  ---> 1b43a84a5e32
[info] Step 5/7 : USER root
[info]  ---> Running in 282c7f7de8ad
[info] Removing intermediate container 282c7f7de8ad
[info]  ---> 11fed4892683
[info] Step 6/7 : ENTRYPOINT ["/opt/docker/bin/my_job"]
[info]  ---> Running in 1d297dd1e960
[info] Removing intermediate container 1d297dd1e960
[info]  ---> 1923a8df3fcf
[info] Step 7/7 : CMD []
[info]  ---> Running in 3d9f7a4a262b
[info] Removing intermediate container 3d9f7a4a262b
[info]  ---> d67ed46fd3fe
[info] Successfully built d67ed46fd3fe
[info] Successfully tagged docker_app_internal:0.1
[info] Built image docker_app_internal with tags [0.1]
[success] Total time: 25 s, completed Mar 27, 2019 10:23:35 AM

您可能会对错误感到困惑。为什么：这个工作：

docker run -it --entrypoint=/bin/bash docker_app_internal:0.1  -i

不起作用：

docker run docker_app_internal:0.1

感谢@Muki创建这个有用的项目。

参考：https://github.com/sbt/sbt-native-packager

Answer 1

如果您的项目根文件夹与MainClass名称不同，那么使用entrypoint的sbt docker:publishLocal将变为/your/linuxpath/bin/rootFolder。但是，在docker镜像中创建的实际文件是/your/linuxpath/bin/main-class（如果您的主类名是MainClass）

要解决此问题，请明确提及build.sbt中的入口点，如下所示：

dockerEntrypoint := Seq("/opt/docker/bin/main-class")