Question

我有一个sbt项目，可以说DemoProject依赖于另一个sbt项目commonsProject DemoProject使用了一个jars commonsProject，因为我为commonsProject创建了两个自定义图像，第二个为DemoProject创建了自定义图像这是commonsProject的DockerFile

FROM hseeberger/scala-sbt:11.0.2_2.12.8_1.2.8

MAINTAINER name <name@gmail.com>

ADD . /project-commons

WORKDIR /project-commons

# Define default command.
CMD ["sbt", "publishLocal"]

然后我用docker build project-commons:v1 .

构建图像

这是DemoProject的Dockerfile

FROM project-commons:v1 

MAINTAINER name <name@gmail.com>

WORKDIR /project-commons

ADD  . /home/user/.ivy2/local/project-commons_2.12/0.1.0-SNAPSHOT/jars/project-commons_2.12.jar
# Define default command.
CMD ["sbt","publishLocal"]

FROM hseeberger/scala-sbt:11.0.2_2.12.8_1.2.8

MAINTAINER name <name@gmail.com>

WORKDIR /project-demo

ADD . /project-demo

# Define default command.
CMD ["sbt", "run"]

并构建它docker build project-demo:v1并运行

docker run project-demo

但是在日志中，我得到了project-commons.jar的未解决依赖性的例外，它说找不到jar 我在这里想念什么？我是Docker的初学者，请指导我

Answer 1

您正在尝试做multi-stage build。在第二阶段（从第二个FROM开始），您必须指定要从上一个阶段添加哪些文件：

FROM project-commons:v1 as firstStage

MAINTAINER name <name@gmail.com>

WORKDIR /project-commons

ADD  . /home/user/.ivy2/local/project-commons_2.12/0.1.0-SNAPSHOT/jars/project-commons_2.12.jar
# Define default command.
CMD ["sbt","publishLocal"]

FROM hseeberger/scala-sbt:11.0.2_2.12.8_1.2.8

MAINTAINER name <name@gmail.com>

# Copy from previous stage
COPY --from=firstStage /projectCommons /projectCommons
COPY --from=firstStage /home/user/.ivy2/ /home/user/.ivy2/

WORKDIR /project-demo

ADD . /project-demo

# Define default command.
CMD ["sbt", "run"]

但是为什么不正常构建呢？（由于某种原因，您正在复制映像中的当前构建目录两次，ADD之一可能是多余的）

FROM project-commons:v1

MAINTAINER name <name@gmail.com>

ADD  . /home/user/.ivy2/local/project-commons_2.12/0.1.0-SNAPSHOT/jars/project-commons_2.12.jar

WORKDIR /project-demo

ADD . /project-demo

# Define default command.
CMD ["sbt", "run"]

如何在Docker中的另一个自定义映像中使用自定义映像

1 个答案: