Red Hat Universal Base Images (UBIs) allow developers using Docker on Windows and Mac platforms to tap into the benefits of the large Red Hat ecosystem. This article demonstrates how to use Red Hat Universal Base Images with Docker from a non-Red Hat system, such as a Windows or Mac workstation.
Red Hat Enterprise Linux and Docker
When Red Hat Enterprise Linux (RHEL) 8 was released almost a year ago, and it came with lots of new features related to containers. The biggest ones were the new container tools (Podman, Buildah, and skopeo) and the new Red Hat Universal Base Images. There was also confusion because RHEL 8 dropped support for the Docker toolset. Some developers thought that they could not work with Docker anymore, and had to either migrate to a Red Hat-ecosystem Linux system such as CentOS or stay away from Red Hat customers.
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Systems management can be a difficult task. Not only does one need to determine what the end state should be but, more importantly, how to ensure systems attain and remain at this state. Doing so in an automated fashion is just as critical, because there may be a large number of target instances. In regard to enterprise Java middleware application servers, these instances are typically configured using a set of XML based files. Although these files may be manually configured, most application servers have a command-line based tool or set of tools that abstracts the end user from having to worry about the underlying configuration. WebSphere Liberty includes a variety of tools to manage these resources, whereas JBoss contains the jboss-cli tool.
Although each tool accomplishes its utilitarian use case as it allows for proper server management, it does fail to adhere to one of the principles of automation and configuration management: idempotence. Ensuring the desired state does not equate to executing the same action with every iteration. Additional intelligence must be introduced. Along with idempotence, another core principle of configuration management is that values be expressed declaratively and stored in a version control system.
Jcliff is a Java-based utility that is built on top of the JBoss command-line interface and allows for the desired intent for the server configuration to be expressed declaratively, which in turn can be stored in a version control system. We’ll provide an overview of the Jcliff utility including inherent benefits, installation options, and several examples showcasing the use.
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If you’ve ever worked with your hands, you know that you can’t do the job right without the right tools. That adage carries over quite well to software development as well. The right tools can make the difference between success or failure, regardless of the underlying technology. In the Kubernetes ecosystem, more and more tools are being introduced as folks find ways to solve a common problem. This article looks are four of those tools.
Continue reading “Command-line tools for Kubernetes: kubectl, stern, kubectx, kubens”
I have been talking about systemd in a container for a long time. Way back in 2014, I wrote “Running systemd within a Docker Container.” And, a couple of years later, I wrote another article, “Running systemd in a non-privileged container,” explaining how things hadn’t gotten much better. In that article, I stated, “Sadly, two years later if you google Docker systemd, this is still the article people see—it’s time for an update.” I also linked to a talk about how upstream Docker and upstream systemd would not compromise. In this article, I’ll look at the progress that’s been made and how Podman can help.
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In a previous article, “OpenShift 4.0 Developer Preview on AWS is up and running” I included instructions for using macOS or Linux to install and manage your Red Hat OpenShift 4.0 cluster. Since I recently added a Windows 10 PC to my technology mix, I decided to try to use Windows as my only choice.
I was saddened to learn that the installer,
openshift-install, isn’t available for Windows. But, like any developer who won’t be denied; I found a way.
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You’ve crushed the whole containers thing—it was much easier than you anticipated, and you’ve updated your resume. Now it’s time to move into the spotlight, walk the red carpet, and own the whole Kubernetes game. In this blog post, we’ll get our Kubernetes environment up and running on Windows 10, spin up an image in a container, and drop the mic on our way out the door—headed to Coderland.
Continue reading “How to set up your first Kubernetes environment on Windows”
By following my previous article in this series, you’ve crushed the whole containers thing. It was much easier than you anticipated, and you’ve updated your resume. Now it’s time to move into the spotlight, walk the red carpet, and own the whole Kubernetes game. In this blog post, we’ll get our Kubernetes environment up and running on macOS, spin up an image in a container, and head to Coderland.
Continue reading “How to set up your first Kubernetes environment on macOS”
You’ve probably already read about Quarkus, but you may not know that the superfast startup speed of Quarkus makes it the best candidate for working with Knative and serverless for your Function-as-a-Service (FaaS) projects.
Quarkus, also known as Supersonic, Subatomic Java, is a Kubernetes native Java stack tailored for GraalVM and OpenJDK HotSpot, crafted from the best-of-breed Java libraries and standards. Knative is a Kubernetes-based platform to build, deploy, and manage modern serverless workloads. You can learn more in this article series.
This article does not provide a full deep dive on Knative or Quarkus. Instead, I aim to give you a quick and easy way to start playing with both technologies so you can further explore on your own.
Continue reading “From zero to Quarkus and Knative: The easy way”
JBoss Tools 4.11.0 and Red Hat CodeReady Studio 12.11 for Eclipse 2019-03 are here and are waiting for you. In this article, I’ll cover the highlights of the new releases and show how to get started.
Continue reading “Announcing Red Hat CodeReady Studio 12.11.0.GA and JBoss Tools 4.11.0.Final for Eclipse 2019-03”
We are extremely pleased to announce that the preview release of the Red Hat OpenShift Connector for JetBrains products (IntelliJ IDEA, WebStorm, etc.) is now available in Preview Mode and supports Java and Node.js components. You can download the OpenShift Connector plugin from the JetBrains marketplace or install it directly from the plugins gallery in JetBrains products.
In this article, we’ll look at features and benefits of the plugin and installation details, and show a demo of how using the plugin improves the end-to-end experience of developing and deploying Spring Boot applications to your OpenShift cluster.
Continue reading “What Red Hat OpenShift Connector for JetBrains products offers developers”