Open Sourcerers
Adopting Kubernetes in an Enterprise is a daunting task. In this series of articles I am trying to give you an opinionated view on what you might need to consider when you are in the middle of rolling out Kubernetes within your organisation. Whether you are a developer or an IT operator, I am trying […]
How we came here Everyday we get in touch with the hottest trends in IT, try out thrilling (new) Open Source projects, and hear from our customers about the business perspective on technology. This has been happening for years now. We realized that all this knowledge and experience was more or less distributed across our […]
Retailers who operate facilities, both physical stores and online stores want to constantly optimize the shopping experience of their customers. Why? Because an easy and pleasant experience increases sales. Simple as that. So shopping experience need to be permanently changed for the better. But does really every change lead to increased sales? How can this […]
If you think about Release Management with OpenShift, you’re automatically thinking about Jenkins. With Jenkins you can easily setup a Release Pipeline for your App(s) and Jenkins is tightly integrated into OpenShift. There are a lot of Demos out there which are describing the best practices of using it. And OpenShift becomes more and more […]
Continuing our journey to build Alexa Skills, we’ll leverage the Alexa Skill SDK (ASK) to create a Custom Skill providing news towards our end-user. Let’s recap the first part of this article series: Skills come in different flavours: Flash Briefing: These skills provide original content for users’ flash briefings Smart Home: With these skills, users […]
Amazon’s Alexa enabled devices, such as the Echo, Dot and most recently Tap provide a hands-free voice controlled environment, to make calls, send and receive messages, provide information and more — instantly. Alexa is the cloud-based voice service that powers this category of devices. All the user has to do is ask Alexa to perform […]
OpenShift 3.3 and later contain the functionality to route pod traffic to the external world via a well-defined IP address. This is useful for example if your external services are protected using a firewall and you do not want to open the firewall to all cluster nodes. The way it works is that a egress […]
In the OpenShift world, Services take place on the OSI Layer 3 / IP, while Routing is an OSI Layer 7 / HTTP/TLS concept. Once you’ve wrapped your head around this backwards choice of naming, things are fairly easy: An OpenShift Router is a component which listens on a physical host’s HTTP/S ports for incoming […]
To allow stable endpoints in an environment of ever changing starting and stopping Pods (and therefore constantly changing IP addresses), Kubernetes introduces (and OpenShift uses) the concept of services. Services are stable IP addresses (taken per default from the 172.30.0.0/16 subnet) that remain the same as long as the service exists. Connection requests to a […]
So far, this sounds like a lot of effort to achieve a little more than a plain docker host – containers that can talk to each other and to the host network, potentially segregated based on kubernetes namespace. However OpenShift SDN also allows pods on different nodes to communicate with each other. To this end, […]