Docker

Snoop..what…?

An explanation may be in order. Snoop is an experimental open source discovery service for Java EE that I created as a demo for my presentation at JavaLand earlier this year. After that I have developed it a little further and now I deem it good enough to be showcased more publicly.

The artifacts are published in Maven Central and has the following coordinates:

<dependency>
   <groupId>eu.agilejava</groupId>
   <artifactId>snoop</artifactId>
   <version>1.0.0</version>
</dependency>

<groupId>eu.agilejava</groupId>

<artifactId>snoop</artifactId>

</dependency>

<dependency>
   <groupId>eu.agilejava</groupId>
   <artifactId>snoop-client</artifactId>
   <version>1.0.0</version>
</dependency>

<groupId>eu.agilejava</groupId>

<artifactId>snoop-client</artifactId>

</dependency>

The Snoop Service is also available in Maven Central and for convenience available as a Docker image.

$ docker run -it -p 8081:8080 ivargrimstad/snoop-service:1.0.0

1	$ docker run -it -p 8081:8080 ivargrimstad/snoop-service:1.0.0

The GitHub project contains the source code as well as more documentation.

https://github.com/ivargrimstad/snoop

Here is a blog post I posted on my blog at Cybercom.

If I should mention one topic that has been more or less on everybody’s lips at every conference I have attended in 2014, it would be Docker. I do not think I have ever seen a technology that has been embraced by so many so fast before.

So what is Docker then?

In short, it is a platform for building, shipping and running applications using containerization.

Read more about it at https://www.docker.com/whatisdocker/

Here are a couple of examples:

Get ubuntu images from Docker Hub:

$ docker pull ubuntu

1	$ docker pull ubuntu

Starting a container running Ubuntu 14.04 is as easy as this:

$ docker run -it ubuntu/14.04 /bin/bash

1	$ docker run -it ubuntu/14.04 /bin/bash

Deploying an application in a container running Wildfly on Ubuntu can be done by creating a Dockerfile similar to this (ivargrimstad/ubuntu-wildfly is a Docker image I have uploaded to my repository at Docker Hub (https://hub.docker.com/u/ivargrimstad/):

FROM ivargrimstad/ubuntu-wildfly
ADD ./app.war /opt/jboss/wildfly/standalone/deployments/app.war

1 2	FROM ivargrimstad/ubuntu-wildfly ADD ./app.war /opt/jboss/wildfly/standalone/deployments/app.war

Build the image:

$ docker build --rm -t myapp .

1	$ docker build --rm -t myapp .

And run the application on port 80:

$ docker run -it -p 80:8080 myapp

1	$ docker run -it -p 80:8080 myapp

These were just a couple of easy examples to get you startet. Try the Docker tutorial at https://www.docker.com/tryit/ to try it out without installing anything locally.

agilejava.eu

by Ivar Grimstad

Snoop 1.0.0 Released

Docker is Everywhere