SBT Native Packager Plugin Docker Error - docker

Question

I have used the sbt docker plugin for one of my project and I get the following error when I ran:
sbt docker:publishLocal
Joes-MacBook-Pro:my-projects joe$ sbt docker:publishLocal
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=724M; support was removed in 8.0
[info] Loading project definition from /Users/joe/projects/my-projects/proj1/project
[info] Set current project to sally (in build file:/Users/joe/projects/my-projects/proj1/)
[info] Wrote /Users/joe/projects/my-projects/proj1/target/scala-2.11/sally_2.11-2.1.pom
java.io.IOException: Cannot run program "docker" (in directory "/Users/joe/projects/my-projects/proj1/target/docker/docker/stage"): error=2, No such file or directory
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1048)
at sbt.SimpleProcessBuilder.run(ProcessImpl.scala:349)
at sbt.AbstractProcessBuilder.run(ProcessImpl.scala:128)
at sbt.AbstractProcessBuilder$$anonfun$runBuffered$1.apply(ProcessImpl.scala:159)
at sbt.AbstractProcessBuilder$$anonfun$runBuffered$1.apply(ProcessImpl.scala:159)
at com.typesafe.sbt.packager.docker.DockerPlugin$$anon$1.buffer(DockerPlugin.scala:275)
at sbt.AbstractProcessBuilder.runBuffered(ProcessImpl.scala:159)
at sbt.AbstractProcessBuilder.$bang(ProcessImpl.scala:156)
at com.typesafe.sbt.packager.docker.DockerPlugin$.publishLocalDocker(DockerPlugin.scala:285)
at com.typesafe.sbt.packager.docker.DockerPlugin$$anonfun$projectSettings$14.apply(DockerPlugin.scala:106)
at com.typesafe.sbt.packager.docker.DockerPlugin$$anonfun$projectSettings$14.apply(DockerPlugin.scala:105)
at scala.Function4$$anonfun$tupled$1.apply(Function4.scala:35)
at scala.Function4$$anonfun$tupled$1.apply(Function4.scala:34)
at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:40)
at sbt.std.Transform$$anon$4.work(System.scala:63)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228)
at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17)
at sbt.Execute.work(Execute.scala:237)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228)
at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:159)
at sbt.CompletionService$$anon$2.call(CompletionService.scala:28)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: error=2, No such file or directory
at java.lang.UNIXProcess.forkAndExec(Native Method)
at java.lang.UNIXProcess.<init>(UNIXProcess.java:248)
at java.lang.ProcessImpl.start(ProcessImpl.java:134)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:1029)
at sbt.SimpleProcessBuilder.run(ProcessImpl.scala:349)
at sbt.AbstractProcessBuilder.run(ProcessImpl.scala:128)
at sbt.AbstractProcessBuilder$$anonfun$runBuffered$1.apply(ProcessImpl.scala:159)
at sbt.AbstractProcessBuilder$$anonfun$runBuffered$1.apply(ProcessImpl.scala:159)
at com.typesafe.sbt.packager.docker.DockerPlugin$$anon$1.buffer(DockerPlugin.scala:275)
at sbt.AbstractProcessBuilder.runBuffered(ProcessImpl.scala:159)
at sbt.AbstractProcessBuilder.$bang(ProcessImpl.scala:156)
at com.typesafe.sbt.packager.docker.DockerPlugin$.publishLocalDocker(DockerPlugin.scala:285)
at com.typesafe.sbt.packager.docker.DockerPlugin$$anonfun$projectSettings$14.apply(DockerPlugin.scala:106)
at com.typesafe.sbt.packager.docker.DockerPlugin$$anonfun$projectSettings$14.apply(DockerPlugin.scala:105)
at scala.Function4$$anonfun$tupled$1.apply(Function4.scala:35)
at scala.Function4$$anonfun$tupled$1.apply(Function4.scala:34)
at scala.Function1$$anonfun$compose$1.apply(Function1.scala:47)
at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:40)
at sbt.std.Transform$$anon$4.work(System.scala:63)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228)
at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:228)
at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:17)
at sbt.Execute.work(Execute.scala:237)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228)
at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:228)
at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:159)
at sbt.CompletionService$$anon$2.call(CompletionService.scala:28)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
[error] (docker:publishLocal) java.io.IOException: Cannot run program "docker" (in directory "/Users/joe/projects/my-projects/proj1/target/docker/docker/stage"): error=2, No such file or directory

Answer 1

Check if docker is running? Try restarting the docker daemon. That should do the trick! Alternatively try setting the docker environment in every command line shell:
eval "$(docker-machine env default)"
where default is the name of the docker machine that you created. Make sure to replace with the one that you created.
Next, try giving the current user docker previliges:
sudo usermod -aG docker $USER