Docker add warfile to official Tomcat image

Question

I pulled official Docker image for Tomcat by running this command.

docker run -it --rm tomcat:8.0

By using this as base image I need to build new image that contains my war file in the tomcat webapps folder. I created Dockerfile like this.

From tomcat8
ADD warfile /usr/local/tomcat

When I run this Dockerfile by building image I am not able to see Tomcat front page.

Can anybody tell me how to add my warfile to official Tomcat images webapp folder.

Answer 1

Reading from the documentation of the repo you would do something like that

FROM tomcat
MAINTAINER xyz

ADD your.war /usr/local/tomcat/webapps/

CMD ["catalina.sh", "run"]

Then build your image with docker build -t yourName <path-to-dockerfile>

And run it with:

docker run --rm -it -p 8080:8080 yourName

• --rm removes the container as soon as you stop it
• -p forwards the port to your host (or if you use boot2docker to this IP)
• -it allows interactive mode, so you see if something get's deployed

Answer 2

Building on @daniel's answer, if you want to deploy your WAR to the root of tomcat, I did this:

FROM tomcat:7-jre7
MAINTAINER xyz

RUN ["rm", "-fr", "/usr/local/tomcat/webapps/ROOT"]
COPY ./target/your-webapp-1.0-SNAPSHOT.war /usr/local/tomcat/webapps/ROOT.war

CMD ["catalina.sh", "run"]

It deletes the existing root webapp, copies your WAR to the ROOT.war filename then executes tomcat.

Answer 3

docker run -it --rm --name MYTOMCAT -p 8080:8080 -v .../wars:/usr/local/tomcat/webapps/ tomcat:8.0

where wars folder contains war to deploy