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Kourier: A lightweight Knative Serving ingress

Kourier: A lightweight Knative Serving ingress

Until recently, Knative Serving used Istio as its default networking component for handling external cluster traffic and service-to-service communication. Istio is a great service mesh solution, but it can add unwanted complexity and resource use to your cluster if you don’t need it.

That’s why we created Kourier: To simplify the ingress side of Knative Serving. Knative recently adopted Kourier, so it is now a part of the Knative family! This article introduces Kourier and gets you started with using it as a simpler, more lightweight way to expose Knative applications to an external network.

Let’s begin with a brief overview of Knative and Knative Serving.

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Ramp up on Quarkus: A Kubernetes-native Java framework

Ramp up on Quarkus: A Kubernetes-native Java framework

Java has been in a bit of an awkward spot since containers took off a few years ago. In the world of Kubernetes, microservices, and serverless, it has been getting harder and harder to ignore that Java applications are, by today’s standards, bloated. Well, until now. In this article, I explore the basics of Quarkus, a Kubernetes-native Java framework built to specifically address Java’s bloatedness problem.

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Migrating applications to OpenShift, Part 1: Overview

Migrating applications to OpenShift, Part 1: Overview

I help teams migrate their applications onto Red Hat OpenShift, so I can’t help but notice patterns and considerations that arise regarding the migration process. Such operations have many domain-specific factors, but in regards to getting the applications up and running on OpenShift, there appear to be several common patterns that teams use to migrate successfully.

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Kogito 0.8.0 features online editors and cloud-native business automation

Kogito 0.8.0 features online editors and cloud-native business automation

Kogito is a cloud-native business automation solution that offers a powerful, developer-friendly experience. Based on production-tested open source projects Drools and jBPM, Kogito has business rules and processes down to a science. Kogito also aligns with popular lightweight runtimes such as Quarkus and Spring Boot to support developers building business-driven applications.

This article is an overview of the new enhancements for Kogito 0.8.0, which was released on March 10, 2020.

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Metrics and traces correlation in Kiali

Metrics and traces correlation in Kiali

Metrics, traces, and logs might be the Three Pillars of Observability, as you’ve certainly already heard. This mantra helps us focus our mindset around observability, but it is not a religion. “There is so much more data that can help us have insight into our running systems,” said Frederic Branczyk at KubeCon last year.

These three kind of signals do have their specificities, but they also have common denominators that we can generalize. They could all appear on a virtual timeline and they all originate from a workload, so they are timed and sourced, which is a good start for enabling correlation. If there’s anything as important as knowing the signals that a system can emit, it’s knowing the relationships between those signals and being able to correlate one with another, even when they’re not strictly of the same nature. Ultimately, we can postulate that any sort of signal that is timed and sourced is a good candidate for correlation as well, even if we don’t have hard links between them.

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Installing Kubeflow v0.7 on OpenShift 4.2

Installing Kubeflow v0.7 on OpenShift 4.2

As part of the Open Data Hub project, we see potential and value in the Kubeflow project, so we dedicated our efforts to enable Kubeflow on Red Hat OpenShift. We decided to use Kubeflow 0.7 as that was the latest released version at the time this work began. The work included adding new installation scripts that provide all of the necessary changes such as permissions for service accounts to run on OpenShift.

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DevNation Live Bengaluru: Sail into cloud — An introduction to Istio

DevNation Live Bengaluru: Sail into cloud — An introduction to Istio

Our first DevNation Live regional event was held in Bengaluru, India in July. This free technology event focused on open source innovations, with sessions presented by elite Red Hat technologists.

In this session, Kamesh Sampath provides an overview of Envoy and Istio, two open source projects that will change the way you write cloud-native Java applications on Kubernetes. We’ll show how to download and set up Istio on your local laptop, then deploy Java microservices as part of the Istio service mesh with Istio sidecar proxy.

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Looking up a hash table library for caching in the 3scale Istio adapter

Looking up a hash table library for caching in the 3scale Istio adapter

You have probably already heard about the service mesh concept and one of its leading implementations, Istio. In the 3scale engineering team at Red Hat, we are working on a component to extend the functionality of Istio (and Red Hat’s distribution, Maistra) by integrating some API Management features via the 3scale platform. In this article, I’ll describe this work and some of the decisions made along the way.

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Manage your APIs deployed with Istio service mesh

Manage your APIs deployed with Istio service mesh

With the rise of microservices architectures, companies are looking for a way to connect, secure, control, and observe their microservices. Currently, a service mesh such as Istio is the best option to reach this goal.

  • Connect: Istio can intelligently control the flow of traffic between services, conduct a range of tests and upgrade gradually with blue/green deployments.
  • Secure: Automatically secure your services through managed authentication, authorization, and encryption of communication between services.
  • Control: Apply policies and ensure that they are enforced and that resources are fairly distributed among consumers.
  • Observe: See what’s happening with rich automatic tracing, monitoring, logging of all your services.

And, as explained in “Distributed microservices architecture: Istio, managed API gateways and, enterprise integration”, a service mesh does not relieve the need for an API management solution. A service mesh manages services and the connections between them, whereas an API management solution manages APIs and their consumers. In this article, I’ll describe how to manage APIs using the Red Hat Integration adapter for Istio.

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