Deploying Java webapp to Tomcat 8 running in Docker container

Question

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 http   192 168 59 103 8888 myapp getData I get a 404  I can t quite figure out why  Am I missing something regarding a  war deploy to Tomcat

User · Accepted Answer

You are trying to copy the war file to a directory below webapps  The war file should be copied into the webapps directory   Remove the mkdir command  and copy the war file like this   COPY  1 0-SNAPSHOT my-app-1 0-SNAPSHOT war  usr local tomcat webapps myapp war   Tomcat will extract the war if autodeploy is turned on

User · Answer

Tomcat will only extract the war which is copied to webapps directory   Change Dockerfile as below   FROM tomcat 8 0 20-jre8 COPY  1 0-SNAPSHOT my-app-1 0-SNAPSHOT war  usr local tomcat webapps myapp war   You might need to access the url as below unless you have specified the webroot   http   192 168 59 103 8888 myapp getData

User · Answer

There s a oneliner for this one   You can simply run   docker run -v  1 0-SNAPSHOT my-app-1 0-SNAPSHOT war  usr local tomcat webapps myapp war -it -p 8080 8080 tomcat   This will copy the war file to webapps directory and get your app running in no time

[java] Deploying Java webapp to Tomcat 8 running in Docker container

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