docker java spring-boot tomcat war

Deploying Java webapp to Tomcat 8 running in Docker container

I am pretty new to Tomcat and Docker – so I am probably missing a Tomcat fundamental somewhere in this question.

What I am trying to do is build a Docker container that runs a SpringBoot Restful web service that just returns some static data. This is all running on OSX so I am using Boot2Docker as well.

I’ve written my own Dockerfile to build the container that my app runs in:

FROM tomcat:8.0.20-jre8
RUN mkdir /usr/local/tomcat/webapps/myapp
COPY /1.0-SNAPSHOT/my-app-1.0-SNAPSHOT.war /usr/local/tomcat/webapps/myapp/

This Dockerfile works fine and I am able to start the container from the created image.

docker build -t myapp .
docker run -it --rm -p 8888:8080 myapp

This container starts correctly and outputs no errors and displays the message saying my app was deployed.

22-Mar-2015 23:07:21.217 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory 
Deploying web application directory /usr/local/tomcat/webapps/myapp

The container also correctly has the myapp.war copied to the path described in the Dockerfile. Moreover I am able to navigate to Tomcat default page to confirm that Tomcat is running, I can also hit all the examples, etc.

To the problem, when I navigate to I get a 404. I can’t quite figure out why. Am I missing something regarding a .war deploy to Tomcat?