Containers

Within Red Hat knowledge sharing and collaboration are important. As a part of that many Red Hatters write books and we get the honor of sharing their knowledge with other developers. We have 7 more books in queue for the coming year and thought we would share the books you can currently download. Learn how to get started with a new technology. Learn why you would want to use new methodologies or technologies. Or just dive in a little deeper...

A few years back (2013-2016) I was working as a C++ Software Development Engineer at Intel on a monolithic product with a backend written in C++ and a web frontend written in Java. The product was shipped complete with hardware and as a VMware image. Internally we kept ISO CD images on a shared server for every released or QA approved version of the product. Built into the product was a very clever issue reporting mechanism that allowed us, developers...

Building a docker formatted container image for a Node.js application There are 2 main strategies for building an image for a Node.js Application. The most common strategy is simply using a Dockerfile with a base image of something like FROM node:4-onbuild. Then do a docker build. This will produce an image with your application in it, ready to be run. This strategy is known as the Docker strategy in an OpenShift BuildConfig. Another strategy is using the s2i tool for...

As I mentioned prior to Red Hat Summit, there was a whole lot of activity around the complementary aspects of microservices, containers, open source, and cloud, so I've assembled this recorded set of sessions on the topic Cloud Native Development. Enjoy! Lessons Learned - From Legacy to Microservices - The Road to Success of Miles & More, by Torben Jaeger, Matthias Krohnen (Miles & More), Serge Pagop An introduction to OpenShift.io, an end-to-end OpenShift development platform in the cloud, by...

Red Hat Summit provides an experience for every type of attendee: Whether it be to attend as many presentations as possible to glean the best practices related to open source technology, to visit as many booths in the Partner Pavilion to see how vendors are enabling open source solutions (or to snag as much swag as possible), or to attend hands-on labs and training sessions to get practical experience with experts to provide guidance. 2017 was my fourth Red Hat...

The content of the previous post discussed creating the open-vm-tools container’s Dockerfile and automating its started up via systemd with a unit file. Open-vm-tools as a service might need to start before the docker runtime or even the network stack, this leads us to runc and system containers. If you’ve finished the first article you have a running open-vm-tools Docker container. docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 5428906cd366 open-vm-tools "/bin/sh -c /usr/bin/" 13 seconds ago Up...

Container application development is hotter than ever, and the Red Hat Development Tools team is continually adding new features to simplify configuration and setup, as well as help developers with coding. Today, Red Hat has released new versions of the following: Red Hat Development Suite 1.4 Red Hat JBoss Developer Studio 10.4 Red Hat Container Development Kit 3 (CDK) New features in Development Suite 1.4 are: The size of the download in MB displays during the installation process. The estimated...

Over the past few months, we’ve been building and releasing a variety of technical cheat sheets and we’ve been getting many requests for more. We are working on new cheat sheets every day, ok maybe not weekends, but almost every day. Here are the cheat sheets available today: Linux Commands Cheat Sheet, Advanced Linux Commands Cheat Sheet, Wildfly Swarm Cheat Sheet, Containers Cheat Sheet, MongoDB Cheat Sheet, Kubernetes Cheat Sheet and the Eclipse Vert.x Cheat Sheet. While you wait for...

JBoss Tools 4.4.4 and Red Hat JBoss Developer Studio 10.4 for Eclipse Neon.3 are here waiting for you. Check it out! Installation JBoss Developer Studio comes with everything pre-bundled in its installer. Simply download it from our Red Hat Developers and run it like this: java -jar devstudio-.jar JBoss Tools or Bring-Your-Own-Eclipse (BYOE) JBoss Developer Studio require a bit more: This release requires at least Eclipse 4.6.3 (Neon.3) but we recommend using the latest Eclipse 4.6.3 Neon JEE Bundle since...

Overview The week of April 3, I attended a meeting of WG14, the C standardization committee, in Markham, ON. Markham is a suburb of Toronto about 40 minutes drive north. Unlike Toronto itself, it's not a particularly interesting destination. We had four days of rain followed by snow, freezing temperatures, and the wind, which was perfect for spending time indoors and made it easy to resist any temptation to go sightseeing. Location The meeting was hosted by IBM at their...

An introduction to microservices through a complete example Today I want to talk about the demo we presented @ OpenShift Container Platform Roadshow in Milan & Rome last week. The demo was based on JBoss team's great work available on this repo: https://github.com/jbossdemocentral/coolstore-microservice In the next few paragraphs, I'll describe in deep detail the microservices CoolStore example and how we used it for creating a great and useful example of DevOps practices. We made some edits to the original project...

Dan Walsh, of SELinux Coloring Book fame, presented on the work he and his team have been doing with containers. Dan has long been a technical leader in the container and SELinux spaces and is an amazing guy. If you take a moment to think back to the PDF format, it was originally created by Adobe to solve representing a document in a consistent way. However, that is not what made it popular and useful. The power of the PDF...

Mandus Momberg, AWS Partner Solutions Architect, presented mechanisms to integrate OpenShift with AWS native features. Many of these concepts are covered in the Red Hat reference architecture for deploying OpenShift Container Platform 3.5 on AWS. To begin with, if you are running or considering RHEL on AWS, check out the Cloud Access Program. This allows you to convert standard RHEL subscription to cloud access licensing at a ratio of 1:2, 2 cloud VMs for every standard license. A lot of...

Recently, the focus on the continuous delivery of value has created a lot of interest in microservices, CI/CD, and containers. The idea is that microservices are small and well defined enough to enable rapid innovation, automated testing, and frequent deployments with minimal risk. This is made possible by adopting continuous integration and continuous delivery pipelines. CI/CD requires the ability to quickly, easily, reliably, and automatically create and tear down complete execution environments. Linux containers address this need by creating lightweight...

Yesterday, at Red Hat Summit, Red Hat announced OpenShift.io. OpenShift.io is the next generation OpenShift platform, based on OpenShift 3, for building and running applications in the cloud. It gives you complete control of your application's lifecycle, from build to production-- regardless of deploying from source or running a pre-built container. In the Developer tools, Overview and Roadmap Part I summit session, Todd Mancini, Peter Muir, and James Strachan take a packed house through an introduction to OpenShift.io (in addition...

Today's announcement of Red Hat OpenShift.io was followed by a full day of developer toolset Summit sessions. These were presented by the OpenShift.io product development team and covered some truly amazing OpenShift.io features. While there are too many features to cover in a single blog post, these were my top 7 items. 1. A Kanban board that is actually useful OpenShift.io is built from the ground up for development teams to rapidly release software. This is one of the primary...

Installing software is a drag Getting a team set up to work on a new software project can be quite time consuming. You have some great ideas for the code you want to write, but you can’t get down to writing it until you have a development environment for yourself and the rest of the team. First, you have to select, download, and install tools. There are usually some settings that need to be configured for each one. Then, every...

Digital transformation is about evolving into a technology business to compete in the digital economy. Businesses can’t transform without relying on the developer to implement the transformation strategy and deliver value. Unfortunately, as developers look to adopt new approaches that let them deliver business value more quickly, they find it challenging to get started in a timely fashion. First, they have to pick a software stack to use as a foundation. In the world of open source, there is an...

In the first part of this series, you can see how to use and configure Red Hat JBoss Developer Studio in order to develop and deploy on the Next-Gen OpenShift platform. A step-by-step guide was given allowing us to: connect to the Next-Gen OpenShift platform from Red Hat JBoss Developer Studio deploy and tune a JBoss Enterprise Application Platform based application debug the deployed JBoss Enterprise Application Platform based application In this second part, we will follow the same pattern...

The OpenShift Next-Gen platform is available for evaluation: visit https://console.preview.openshift.com/. It is based on Red Hat OpenShift Container Platform 3.4. This preview allows you to play with OpenShift Container Platform 3.4 and deploy artifacts. The evaluation is limited to one month. The purpose of the article is to describe how to use Red Hat JBoss Developer Studio or JBoss Tools together with this online platform. Install Red Hat JBoss Developer Studio If you have not already installed Red Hat JBoss...

Hi there! It's been a while since I last wrote an article. Today, I want to show you how to easily setup some persistent storage for your projects in minishift / CDK 3 (Red Hat's Containers Development Kit 3). Prerequisites First, let's start planning what you'll need: A working minishift or CDK 3. That's all, I swear! I won't go deep into how to set up a minishift or CDK 3, there are many articles on the Internet to cover...

What can be done to help the OpenJDK JVM play well in the world of Linux Containers? I thought I'd start tackling this issue by answering some frequently asked questions: Why is it when I specify -Xmx=1g my JVM uses up more memory than 1gb of memory? Specifying -Xmx=1g is telling the JVM to allocate a 1gb heap. It's not telling the JVM to limit its entire memory usage to 1gb. There are card tables, code caches, and all sorts...