Play Framework 2.5 in production: "bad root server path"

Question

I would like to use a prod.conf file in production inside a Docker container. I added this to my Dockerfile:

ENTRYPOINT ["bin/myapp", "-D", "config.resource=prod.conf"]

But I got this error:

Bad root server path: /opt/docker/-D

I get the same error when I try to run the command manually as root

/opt/docker/bin/myapp -D config.resource=prod.conf

If I run

/opt/docker/bin/myapp

It works but using the default application.conf file.

I guess there is no permission issue.

Here is my full Dockerfile:

FROM openjdk:8u121-alpine
WORKDIR /opt/docker
ADD opt /opt
RUN ["chown", "-R", "daemon:daemon", "."]
EXPOSE 9000
USER daemon
ENTRYPOINT ["bin/myapp", "-D", "config.resource=prod.conf"]
CMD []

Edit:

I got the same error locally:

activator clean stage
target/universal/stage/bin/myapp -D config.resource=prod.conf
Bad root server path: /home/me/Documents/MyApp-D

Answer 1

There should be no space between the -D and the config value. Use this instead:

ENTRYPOINT ["bin/myapp", "-Dconfig.resource=prod.conf"]

Answer 2

JAVA_OPTS shall be used to avoid such errors.

JAVA_OPTS="-Dconfig.resource=prod.conf" bin/myapp

Worsk with command line, systemctl.

Answer 3

If you use sbt plugin "DockerPlugin" you can type

dockerEntrypoint := Seq("")

in your build.sbt file. It will cause

ENTRYPOINT [""]

in your Dockerfile. So, then you run docker with your image you should specify in run command the following

bin/myapp "-Dconfig.resource=prod.conf"

i.e.

docker run YOUR_DOCKER_IMAGE bin/myapp "-Dconfig.resource=prod.conf"

Pay attention to quotes on -D