How to run undertow java app with docker

Question

I am using undertow for my applications with docker.

I am able to do the following

create fat jar
create docker image from that
Run that docker image
Listing on 8080 and added EXPOSE 8080 in Docker file
curl my url from INSIDE the CONTAINER , curl localhost:8080/sample

I am facing some weird problem,

And My compose file is

version: '2'
services:
  login:
    image: my-image
    ports:
     - "8080:8080"

with 8080 port I am not able to access the url.

My Dockerfile

FROM openjdk:8-jre
COPY ./target/*-with-dependencies.jar /jars/service-jar.jar
EXPOSE 8080
CMD java  -cp /jars/service-jar.jar my.Main

My Undertow Listener

Undertow server = Undertow.builder()
        .addHttpListener(8080, "localhost")
        .setHandler(path)
        .build();

I got some link in google still not able to make it work

http://lists.jboss.org/pipermail/undertow-dev/2014-October/000999.html

score 4 · Accepted Answer · answered Jan 14 '17 at 16:40

4

fixed the issue , by listening the ip to the docker containers ip address .

I changed my listener to

Undertow server = Undertow.builder()
        .addHttpListener(8080, InetAddress.getLocalHost().getHostAddress())
        .setHandler(path)
        .build();

Now it working fine.

"The external IP is something completely different. So in summary you must set the host server for undertow as the Internal IP in the Iptables created by docker"

I missed to read this line in my reference link (http://lists.jboss.org/pipermail/undertow-dev/2014-October/000999.html).

My boss find out that .

answered Jan 14 '17 at 16:40

vimal prakash

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Keep in mind though that you will run into issues if you use multiple docker-networks for this container. In this scenario, you should use `.addHttpListener(8080,"0.0.0.0")`, which basically says: "listen on all ip addresses" – ShrimpPhaser Jan 14 '17 at 19:34
@ShrimpPhaser,thank you for the suggestion. this also works. – vimal prakash Jan 14 '17 at 20:52

score 0 · Answer 2 · answered Jan 14 '17 at 08:42

0

How are you running your docker image? Are you publishing port?

docker run -p 8080:8080 ...

How to run undertow java app with docker

2 Answers2