如何在Scala中激活sbt DockerPlugin？

Question

I have two scala projects, one is already defined to build its docker container through the sbt docker plugin. The other one I want to dockerify as well.

The working one has in its build.sbt the following lines relevant to the docker config:

organization := "com.namespace"
name := "dockerized-app"
version := sys.env.getOrElse("PIPELINE_VERSION", "0.1.0_local")
scalaVersion := "2.12.4"
enablePlugins(JavaAppPackaging)
enablePlugins(DockerPlugin)
packageName in Docker := packageName.value
dockerRepository := Some("our-docker.io:5001")
dockerExposedPorts := Seq(8080)

I thought that I could copy paste the relevant lines to the new project, change the name, and make it work.

Yet when I add the line to the about to be dockerified scala project:

enablePlugins(DockerPlugin)

I get the error:

 Cannot resolve symbol DockerPlugin

I've looked through the prexisting projects libraryDependencies , yet it doesn't seem to be configured that way. In the the pre-configured project, IntellJ somehow knows the plugin, I can track that the DockerPlugin comes from com.typesafe.sbt.packager.docker . This made me assume that sbt comes shipped with it by default.

Yet apparently I have to activate it somehow.

Digging deeper I also tried adding this to my plugins.sbt to no avail:

addSbtPlugin("com.typesafe.sbt" % "sbt-native-packager" % "1.3.2")

How to activate DockerPlugin using sbt in scala?

Answer 1

In order to make it working properly you need to add the following line:

addSbtPlugin("com.typesafe.sbt" % "sbt-native-packager" % "1.3.2")

in your project/plugins.sbt file.

Then refresh your project and it should work.

For further information, please check the Sbt Native Packager documentation .