Kubernetes

First steps with the data virtualization Operator for Red Hat OpenShift

First steps with the data virtualization Operator for Red Hat OpenShift

The Red Hat Integration Q4 release adds many new features and capabilities with an increasing focus around cloud-native data integration. The features I’m most excited about are the introduction of the schema registry, the advancement of change data capture capabilities based on Debezium to technical preview, and data virtualization (technical preview) capabilities.

Data integration is a topic that has not received much attention from the cloud-native community so far, and we will cover it in more detail in future posts. Here, we jump straight into demonstrating the latest release of data virtualization (DV) capabilities on Red Hat OpenShift 4. This is a step-by-step visual tutorial describing how to create a simple virtual database using Red Hat Integration’s data virtualization Operator. By the end of the tutorial, you will learn:

  • How to deploy the DV Operator.
  • How to create a virtual database.
  • How to access the virtual database.

The steps throughout this article work on any Openshift 4.x environment with operator support, even on time- and resource-constrained environments such as the Red Hat OpenShift Interactive Learning Portal.

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Move your APIs into the serverless era with Camel K and Knative

Move your APIs into the serverless era with Camel K and Knative

In the past few years, developers have addressed the challenge of evolving from monolith systems to microservices architecture. These days, we hear about the adoption of serverless systems.

Like many trends in software, there’s no one clear view of how to define serverless or how this approach offers added value for our software architecture. The perfect place to start with serverless systems and discover serverless capabilities is through a use case.

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CodeReady Workspaces devfile, demystified

CodeReady Workspaces devfile, demystified

With the exciting advent of CodeReady Workspaces (CRW) 2.0 comes some important changes. Based on the upstream project Eclipse Che 7, CRW brings even more of the “Infrastructure as Code” idea to fruition. Workspaces mimic the environment of a PC, an operating system, programming language support, the tools needed, and an editor. The real power comes by defining a workspace using a YAML file—a text file that can be stored and versioned in a source control system such as Git. This file, called devfile.yaml, is powerful and complex. This article will attempt to demystify the devfile.

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Red Hat CodeReady Workspaces 2: New tools to speed Kubernetes development

Red Hat CodeReady Workspaces 2: New tools to speed Kubernetes development

We are pleased to announce the release of Red Hat CodeReady Workspaces 2.0. Based on Eclipse Che, its upstream project CodeReady Workspaces is a Red Hat OpenShift-native developer environment enabling cloud-native development for developer teams.

CodeReady Workspaces 2.0 is available now on OpenShift 3.11 and OpenShift 4.x.

This new version introduces:

  • Kubernetes-native developer sandboxes on OpenShift: Bring your Kubernetes application into your development environment, allowing you to code, build, test, and run as in production.
  • Integrated OpenShift experience: OpenShift plugin and integration into the OpenShift 4 Developer Console.
  • New editor and Visual Studio (VS) Code extensions compatibility: New browser-based editor, providing a fast desktop-like experience and compatibility with Visual Studio Code extensions.
  • Devfile, developer environment as code: Developer environments are codified with a devfile making them consistent, repeatable, and reproducible.
  • Centrally hosted on OpenShift with AirGap: Deploy on your OpenShift cluster, behind your firewall. AirGap capabilities. Easier to monitor and administer.

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Pod Lifecycle Event Generator: Understanding the “PLEG is not healthy” issue in Kubernetes

Pod Lifecycle Event Generator: Understanding the “PLEG is not healthy” issue in Kubernetes

In this article, I’ll explore the “PLEG is not healthy” issue in Kubernetes, which sometimes leads to a “NodeNotReady” status. When understanding how the Pod Lifecycle Event Generator (PLEG) works, it is helpful to also understand troubleshooting around this issue.

What is PLEG?

The PLEG module in kubelet (Kubernetes) adjusts the container runtime state with each matched pod-level event and keeps the pod cache up to date by applying changes.

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OpenShift Connector: Visual Studio Code extension for Red Hat OpenShift

OpenShift Connector: Visual Studio Code extension for Red Hat OpenShift

The new release of Red Hat OpenShift 4.2 has many developer-focused improvements. In that context, we have released a new version of OpenShift Connector 0.1.1, a Visual Studio (VS) Code extension with more improved features for a seamless developer experience. Developers can now focus on higher-level abstractions like their application and components and can drill down deeper to get to the OpenShift and Kubernetes resources that make up their application directly from VS Code.

Let’s take a deep tour of the new features with respect to OpenShift Connector.

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Getting started with Golang Operators by using Operator SDK

Getting started with Golang Operators by using Operator SDK

The open source Operator Framework is a toolkit to manage Kubernetes-native applications. The framework and its features provide the ability to develop solutions to simplify some complexities, such as the process to install, configure, manage and package applications on Kubernetes and Red Hat OpenShift. It provides the ability to use a client to perform CRUD actions, that is, operations to create, read, update, and delete data on these platforms.

By using operators, it’s possible not only to provide all expected resources but also to manage them dynamically, programmatically, and at execution time. To illustrate this idea, imagine if someone accidentally changed a configuration or removed a resource by mistake; in this case, the operator could fix it without any human intervention. We’ll take a look at Operators and the Operator SDK in this article.

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Using Red Hat OpenShift image streams with Kubernetes deployments

Using Red Hat OpenShift image streams with Kubernetes deployments

This article demonstrates an application update scenario which leverages Red Hat OpenShift image streams together with standard Kubernetes native resources. It also shows how image streams automatically redeploy application pods after an update to their container image.

Best of all, Kubernetes resources enhanced with OpenShift image streams are still compatible with standard Kubernetes clusters. This fact enables the use of the same resource definitions to support multiple Kubernetes distributions, and at the same time take advantage of features unique to OpenShift.

At the end of this article, we present a few considerations around using image IDs and image name tags to manage your ability to roll back to previous versions of an application.

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Eclipse Che, Kubernetes-native IDE, version 7 now available

Eclipse Che, Kubernetes-native IDE, version 7 now available

Today, the Eclipse Foundation announced the release of Eclipse Che 7, the Kubernetes-native IDE, enabling developer teams to code, build, test, and run cloud-native applications. We are excited by this announcement and the new capabilities that this version offers the community and developers building containerized applications.

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