Simple java project demos how to build a war file to be deployed on a Tomcat server.
The build script uses mvn package to produce a demo.war file and then bundles it with a Docker image that runs Tomcat. Usage:
bin/build
- mvn package was ran and the
target/demo.warwas moved intoNick-docker.war - a docker image was built which copied the ``Nick-docker.war
to/opt/tomcatdocker/docker`. Check out the Dockerfile for details.
Here's an example of some things to check after running the build script:
$ ls pkg/demo.war
pkg/demo.war
$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
Nick-docker latest 88092dfb7325 6 minutes ago 591MB
tomcat 8.5 a92c139758db 2 weeks ago 558MB
$
The app is a small demo of a java servlet app. Here's the source code to url mapping:
| Source | Url |
|---|---|
| src/main/java/Hello.java | localhost:8080/demo/Hello |
| src/main/webapp/index.jsp | localhost:8080/demo/index.jsp |
Here are the summarized commands to run and test that Tomcat is serving the war file:
docker run --rm -p 8080:8080 -d demo-java
docker exec -ti $(docker ps -ql) bash
curl localhost:8080/demo/Hello
curl localhost:8080/demo/index.jsp
exit
docker stop $(docker ps -ql)
Then you can hit the the [HOSTNAME]:8080/demo/Hello and to verify that Tomcat is servering the demo.war file. You should see an html page that says "Hello World". The output should look similar:
$ docker run --rm -p 8080:8080 -d demo-java
2ba7323481fa5c4068b90f2edf38555d9551303e9c2e4c27137ab0545688555b
$ docker exec -ti $(docker ps -ql) bash
root@2ba7323481fa:/usr/local/tomcat# curl localhost:8080/demo/Hello
<h1>Hello World Hello.java</h1>
root@2ba7323481fa:/usr/local/tomcat# curl localhost:8080/demo/index.jsp
<html>
<body>
<h2>Hello World index.jsp!</h2>
</body>
</html>
root@2ba7323481fa:/usr/local/tomcat# exit
exit
$ docker stop $(docker ps -ql)
2ba7323481fa
$ docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
$