1 Oct 2015 in Series: Ready Made, Containers, Docker, Round-up

Five More Popular Java-based Docker Images

In my last post, I looked at a few Java-based Docker images that can streamline your container workflow. I highlighted some of the issues you can run into when working with Apache Hadoop, Apache Tomcat, Apache Maven, Stash, and Glassfish in containers. I also provided a few workarounds.

In this post, we’ll review five more Java-based Docker repositories, along with some of the current bugs that you might run into when working with them.

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24 Sep 2015 in Overview, Perspective

A Developer’s Journey into Linux Containers

Frustrated Developer

I’ll let you in on a secret: all that DevOps cloud stuff that goes into getting my applications into the world is still a bit of a mystery to me. But, over time I’ve come to realize that understanding the ins and outs of large scale machine provisioning and application deployment is important knowledge for a developer to have. It’s akin to being a professional musician. Of course you need know how to play your instrument. But, if you don’t understand how a recording studio works or how you fit into a symphony orchestra, you’re going to have a hard time working in such environments.

In the world of software development getting your code into our very big world is just as important as making it. DevOps counts and it counts a lot.

So, in the spirit of bridging the gap between Dev and Ops I am going to present container technology to you from the ground up. Why containers? Because there is strong evidence to suggest that containers are the next step in machine abstraction: making a computer a place and no longer a thing. Understanding containers is a journey that we’ll take together.

In this article I am going to cover the concepts behind containerization. I am going to cover how a container differs from a virtual machine. I am going to go into the logic behind containers construction as well as how containers fit into application architecture. I’ll discussion how lightweight versions of the Linux operating system fits into the container ecosystem. I’ll discuss using images to create reusable containers. Lastly I’ll cover how clusters of containers allow your applications to scale quickly.

In later articles I’ll show you the step by step process to containerize a sample application and how to create a host cluster for your application’s containers. Also, I’ll show you how to use a Deis to deploy the sample application to a VM on your local system as well as a variety of cloud providers.

So let’s get started.

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17 Sep 2015 in Docker, Overview

Dockerfile Instructions and Syntax

In my previous post we learnt about Docker basics and its installation process on a non-Linux system. We also learnt about Docker architecture and the terminology used while dealing with Docker. But what next?

All this knowledge is no good if can’t solve a real life problem.

We all know that Docker simplifies application deployment via containerization. But how does that happen, and how can you use Docker to deploy your own application quickly?

To understand this, we need to understand the image creation process and the steps to spawn a container from an image.

So, let’s start with the process of creating Docker images.

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15 Sep 2015 in Docker, Perspective

Why I'm Excited About Docker

Docker is already being used in production by big companies, has received a tremendous amount of publicity, and continues to spur excitement in the tech industry. For a project that is only two years old, this success is unprecedented.

In the first post of this miniseries, I’d like to share the reasons behind my excitement about Docker and explain why I think Docker has made my work as a developer easier. In the second post in this miniseries, I will summarise what I learnt from the interesting announcements and demos at DockerCon, which took place in San Francisco in June.

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10 Sep 2015 in Series: Ready Made, Java, Round-up

Ready-made Java-based Containers, Part One

Despite not being seen as very "trendy", Java is a hugely popular and important language that dominates the mobile market, open source, and of course, the enterprise. Did you know, for instance, that 63% of the projects at The Apache Software Foundation are written in Java?

Fortunately, Java developers aren’t left out in the cold by advances in container technology. And this post highlights four popular Java-based Docker images, their configuration, and how they can help your team work more efficiently.

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