Istio Routing Basics

When learning a new technology like Istio, it’s always a good idea to take a look at sample apps. Istio repo has a few sample apps but they fall short in various ways. BookInfo is covered in the docs and it is a good first step. However, it is too verbose with too many services for me and the docs seem to focus on managing the BookInfo app, rather than building it from ground up. There’s a smaller helloworld sample but it’s more about autoscaling than anything else.


Prevent DNS (and other) spoofing with Calico

AquaSec’s Daniel Sagi recently authored a blog post about DNS spoofing in Kubernetes. TLDR is that if you use default networking in Kubernetes you might be vulnerable to ARP spoofing which can allow pods to spoof (impersonate) the IP addresses of other pods. Since so much traffic is dialed via domain names rather than IPs, spoofing DNS can allow you to redirect lots of traffic inside the cluster for nefarious purposes.


Extend CI/CD with CR for Continuous App Resilience

The radical shift towards DevOps and the continuous everything movement have changed how organizations develop and deploy software. As the consolidation and standardization of continuous integration and continuous delivery (CI/CD) processes and tools occur in the enterprise, a standardized DevOps model helps organizations deliver faster software functionality at a large scale.


How to enable serverless computing in Kubernetes

In the first two articles in this series about using serverless on an open source platform, I described how to get started with serverless platforms and how to write functions in popular languages and build components using containers on Apache OpenWhisk.Here in the third article, I’ll walk you through enabling serverless in your Kubernetes environment.


Big Data and Kubernetes - Why Your Spark & Hadoop Workloads Should Run Containerized...(1/4)

Starting this week, we will do a series of four blogposts on the intersection of Spark with Kubernetes. The first blog post will delve into the reasons why both platforms should be integrated. The second will deep-dive into Spark/K8s integration. The third will discuss usecases for Serverless and Big Data Analytics. The last post will round off with insights on best practices.


5 reasons to use Kubernetes

Kubernetes is the de facto open source container orchestration tool for enterprises. It provides application deployment, scaling, container management, and other capabilities, and it enables enterprises to optimize hardware resource utilization and increase production uptime through fault-tolerant functionality at speed. The project was initially developed by Google, which donated the project to the Cloud-Native Computing Foundation. In 2018, it became the first CNCF project to graduate.


Simplify Migration from OpenShift 3 to 4

This is a guest post written by Appranix. Now that Red Hat OpenShift 4 has officially been released, it’s time to start thinking about migration from Red Hat OpenShift Container Platform 3 to OpenShift Container Platform 4. You can check out the details about the differences between OpenShift 3 and 4 here. One of the biggest differences between OpenShift 3 and 4 is how OpenShift 4 clusters operate using immutable and automated infrastructure enabled by RHEL CoreOS and automation.

How To Extend Firewalls to Kubernetes to Stop Breaking Existing Security Architectures

Security teams use firewalls to secure their production environments, often using a zone-based architecture, and Kubernetes does not deploy well to that architecture. Application teams are launching new business-critical applications on Kubernetes and are aggressively moving to production. A clash is bound to happen.