CODEWITHSUNDEEP
scaladockersbt
d-_-b
d-_-b

Reputation: 4502

Sbt run command fails with "NoSuchFileException" on Docker container

I have a Play application(built with Scala) that I am trying to run on Docker container.

The following are the parts of docker-compose.yml and build.sbt I am using to spin up a container to run the sbt command.

↓ docker-compose.yml

version: '3.7'
services:
  service-name:
    entrypoint: >
       sh -c 'cd /root/project_dir && sbt service/run'
    volumes:
      - ./project:/root/project_dir/project
      - ./service_src:/root/project_dir/service_src
      - ./build.sbt:/root/project_dir/build.sbt
      - ./.ivy2/:/root/.ivy2/
      - ./.sbt/:/root/.sbt/

↓ build.sbt

lazy val service = project
  .in(file("./service_src"))
      :
  )

When I start a container with this setting, for some reason I end up getting the following error

[error] java.nio.file.NoSuchFileException: /root/.ivy2/cache/org.webjars.npm/wrappy/jars/wrappy-1.0.2.jar

which actually exists in the cache.

Where should I look into to figure out what could cause this?

Update:

From observation, I have figured out that mounting the Windows host directory in the container seems to be causing the problem.

Instead of mounting, copying the files/directories via docker copy eliminates the error...

How can I achieve the same using the volumes or it this something that cannot be done?

Upvotes: 0

Views: 791

Answers (2)

dvir
dvir

Reputation: 2566

You don't need to copy the .sbt and .ivy2 dirs.
I advise to use sbt native packager so it would create an image for you, instead of reinventing the wheel:
Add addSbtPlugin("com.typesafe.sbt" % "sbt-native-packager" % "1.3.18") to a file called project/plugins.sbt.
Then in your build.sbt add .enablePlugins(JavaAppPackaging, DockerPlugin) to your project: 

lazy val service = project
  .in(file("./service_src"))
      :
  ).enablePlugins(JavaAppPackaging, DockerPlugin)

You can change the image settings with sbt configuration:

dockerExposedPorts := Seq(9000)
dockerBaseImage := "openjdk:8-jre"
version in Docker := "1.0.0"

In order to build an image on your computer, run sbt docker:publishLocal.
You can see the created docker image by running sbt docker:stage.

See the documentation for further help, or ask here.
See the Alpine section if you want to run your app with Alpine (lightweight Linux distribution).

Upvotes: 2

Ivan Stanislavciuc
Ivan Stanislavciuc

Reputation: 7275

The problem might be related to access rights used within docker image.

Check that the file does exist and can be read manually with a bash/shell from within container.

docker-compose run service-name sh

Or if container is running

docker-compose exec service-name sh

This should yield sh command line and run 

ls -al /root/.ivy2/cache/org.webjars.npm/wrappy/jars/wrappy-1.0.2.jar

Check that file exists and what rights are assigned to it.

If rights are not the problem, do your debug within shell of the container.

Upvotes: 1

Related Questions