Microservices

Welcome to the fourth installment of That App You Love , a blog series in which I show you how to you can make almost any app into a first-class cloud citizen. If you want to start from the beginning, jump back and check out Part 1: Making a Connection . In Part 3 , we looked at how to customize the configuration of ZNC using an expect script and environment variables. But forget ZNC, because we’re really talking about...

One of our most popular Red Hat JBoss BRMS demo's, and one that has been available for quite some time, is the CoolStore demo . The CoolStore demo shows how business rules can be used to calculate values like promotional and shipping discounts in a shopping-cart. It furthermore illustrates concepts like ruleflow-groups and dynamic rule updates using KieScanner . Rules and micro-services: the JBoss BRMS Decision Server One of the more interesting features we've recently released in the Red Hat...

Welcome to the third installment of That App You Love , a blog series in which I show you how to you can make almost any app into a first-class cloud citizen. If you want to start from the beginning, jump back and check out Part 1: Making a Connection . In Part 2 of this series, we looked at ZNC’s configuration options to decide which settings we wanted to expose to the user, and which settings we could hard-code...

Inspired by a great blog post by Jakub Scholz on "Scalable AMQP infrastructure using Kubernetes and Apache Qpid", I wanted to write a post about the ongoing effort to build Messaging-as-a-Service at Red Hat. Messaging components such as the Apache Qpid Dispatch Router , ActiveMQ Artemis and Qpidd scales well individually, but scaling a large deployment can become unwieldy. As Scholtz demonstrates, there are a lot of manual setup when creating such a cluster using kubernetes directly. The EnMasse project...

Welcome to the second installment of That App You Love , a blog series in which I show you how to you can make almost any app into a first-class cloud citizen. If you want to start from the beginning, jump back and check out Part 1: Making a connection . In our last post, we met my ZNC container, good ol’ znc-cluster-app - but don’t fret about ZNC because we’re really talking about That App You Love - whatever...

I am going to show you how I took an everyday, off-the-shelf application and turned it into a cluster-ready juggernaut of persistent usefulness. Along the way, I’ll share the pitfalls that I hit in getting this all working so that you can chuckle at my misfortune and avoid having to make the same mistakes yourself. This series will run every Tuesday and Thursday until we've accomplished our goals, so stay tuned in, subscribe, and thanks for reading! Meet “That App...

Microservices are becoming a new trend, thanks to the modularity and granularity they provide on top of advantages like releasing applications in a continuous manner. There are various platforms and projects that are rising which aims to make writing and managing microservices easy. Keeping that in mind, I thought, why not make a demo application that can give an example of how microservices are built and how they interact. In this article, I will be building a small application using...

One of the greatest advantages of using docker containers is the fact that you can move them between environments. A promotion from Development to a Production environment, shouldn’t take more than some few seconds. This is one aspect of “Continuous Delivery” Because Microservices Architectures are “independently replaceable and upgradeable”, they are the best scenario to show a “Deployment Pipeline” . Red Hat Developers has produced a sample and free application called “Red Hat Helloworlds MSA” that demonstrates different aspects of...

The last 4-5 years have seen the debut of many new software products specifically targeting both infrastructure services and IT automation. The consumerization of IT has caused its architects to take a fresh look at their existing, often times monolithic apps and IT infrastructure and asking: Can we do better? How do I keep IT relevant? How do I keep track of all these VMs and data? How do I scale out my IT environment without a huge budget increase...

UPDATE: Read the new article " How to run systemd in a container " for the latest information. What is the scoop on running systemd in a container? A couple of years ago I wrote an article on Running systemd with a docker-formatted Container . Sadly, two years later if you google docker systemd this is still the article people see --- it's time for an update. This is a follow-up for my last article. docker upstream vs. systemd I...

Do you like JavaEE apps, but wonder how to fit them into a microservices-centric workflow? WildFly Swarm is the answer. I know—“Java” and “microservices” are not words that seem to go together. Java is an old, relatively unsexy programming language. It’s a pretty useful one, but it was created long before the era of Continuous Delivery, containers and microservices. But that doesn’t mean you have to give up on Java if you want to take advantage of microservices. WildFly Swarm...

In an earlier article, Debugging Java Applications using the Red Hat Container Development Kit , it was discussed how developer productivity could be improved through the use of remotely debugging containerized Java applications running in OpenShift and the Red Hat Container Development Kit. Not only does remote debugging provide real time insight into the operation and performance of an application, but reduces the cycle time a developer may face as they are working through a solution. Included in the discussion...

You’ve heard of microservices. You’ve heard of OpenShift. You’ve heard of Kubernetes. Actually, you may already have considerable experience with each of these three concepts and tools. But do you know how to combine all of them in order to deploy microservices effectively? If not, this article is for you. Below, I’ll explain how microservices, OpenShift and Kubernetes fit together, and provide an overview of how you can leverage the orchestration tools provided by OpenShift and Kubernetes in order to...

This year’s middleware keynote address at Red Hat Summit talked about microservices, the power of the pipeline, and how developers and devops can work together to release code to production at a much higher rate. The keynote also demonstrated how releases can be shipped so you can switch from the existing deployment to a new deployment (blue/green deployments), and demonstrated how to roll out a canary deployment to a subset of users to test out new features. (If the canary...

https://www.youtube.com/watch?v=MrV0DqTqpFU The challenge of data with microservices Of the reasons we attempt a microservices architecture , chief among them is allowing your teams to be able to work on different parts of the system at different speeds with minimal impact across teams. So we want teams to be autonomous, capable of making decisions about how to best implement and operate their services, and free to make changes as quickly as the business may desire. If we have our teams organized...

One of my favourite books is Antifragile by Nassim Taleb where the author talks about things that gain from disorder. Nacim introduces the concept of antifragility which is similar to hormesis in biology or creative destruction in economics and analyses it charecteristics in great details. If you find this topic interesting, there are also other authors who have examined the same phenomenon in different industries such as Gary Hamel , C. S. Holling , Jan Husdal . The concept of...

Following my introduction blog about why microservices should be event-driven , I’d like to take another few steps and blog about it. (Hopefully I saw you at jBCNconf and Red Hat Summit in San Francisco , where I spoke about some of these topics). Follow me on twitter @christianposta for updates on this project. In this article we discuss the first parts of carving up a monolith. The monolith I’m exploring in depth for these articles will be from the...

WildFly Swarm is a "Just Enough" Application Server. If you don't need EJB, don't bundle it. Likewise for JPA, JAX-RS, or whatever subsystem. Bringing only the portions of an App Server that you need is the strategy that makes Java EE and the JVM a real contender in the microservices space. Ken Finnigan, Co Founder/Lead of WildFly Swarm, walked us through how easy it is to move a monolith deployment to a WildFly Swarm Microservice. Getting Started Getting started is...

A huge problem facing modern enterprises is managing the large software systems and applications they deal with on a daily basis. Be it the CRM system purchased by a predecessor, a bundled HRM product thrown in to sweeten a deal, or the CMS that marketing could not live without, silos of information exist in the modern enterprise, and it can often be difficult to utilize the data that these systems contain. When an enterprise decides to buy a proprietary system...

If you'd like to receive this monthly newsletter with fresh news, register here . Red Hat Developers Newsletter - August 2015 Welcome to the Red Hat ® Developers Newsletter. This month, many of you are getting your kids ready to go back to school. Learning can be a lot of fun, and we Red Hatters wish them (and you) good luck for the new year. By the way, have you learned something new lately? How about containers or Red Hat...