Story Tag: operators

Stories Tag: operators

ElasticSearch (Operator) and Graylog on Kubernetes | by Valerijs Zemlanikins | Apr, 2021 | Medium

admin 2 months ago in

ElasticSearch now looks like the standard solution for logging. Many companies want to use and install it. The main problem is that if you want to make your ElasticSearch system production-ready, you must have an ElasticSearch cluster. You have to maintain and configure master nodes and data nodes. You can find lots of manuals and pre-existing manifests for it, or use navigational diagrams, but you…

Getting Started to Write Your First Kubernetes Admission Webhook Part 1✨ | by Batuhan Apaydın | Trendyol Tech | Apr,...

admin 2 months ago in

Kubernetes Admission Controllers concept is very popular these days, especially dynamic ones: MutatingAdmissionWebhook and ValidatingAdmissionWebhook. 🌟 Before jump into the details of how we can write one of these, let’s explain a little bit about, what are they, what we can do with them. An admission controller is a piece of code that intercepts requests to the Kubernetes API server prior to the persistence of…

Kubernetes operators best practices: understanding conflict errors | by Alena Varkockova | Apr, 2021 | Medium

admin 3 months ago in

One of the most prevalent errors one encounters when developing an operator is ‘the object has been modified; please apply your changes to the latest version and try again’. Please raise your hand if you’ve seen this in your logs… Yeah, that’s what I thought 🙂 To understand why this is happening, it’s worth noting that API server uses an optimistic concurrency control to deal…

Kubernetes operator best practices: Implementing observedGeneration | by Alena Varkockova | Feb, 2021 | Medium

admin 4 months ago in

There’s a lot of hidden knowledge in core controllers and api conventions doc that is not followed by many controllers in the wild. One of these patterns is observedGeneration. Let’s take a closer look at what problems it can help solve. Kubernetes resources typically enforce spec and status separation. That means that the desired state (‘spec’ part of the object) and status (‘status’ part of…

How to deploy Splunk in an OpenShift environment | by Eduardo Patrocinio | IBM Garage | Dec, 2020 | Medium

admin 6 months ago in

The introduction of Operators made it very simple to install complicated things in OpenShift (and any Kubernetes environment). Take, for example, Splunk Enterprise. It used to take a long sequence of commands to install all the Kubernetes artifacts. Now, with the Splunk Operator (https://splunk.github.io/splunk-operator/), it’s straightforward to install it in an OpenShift environment. In this article, I will show how to deploy Splunk Enterprise using…

Build your Microservices the Easy Way with OperatorHub | by masamh | Dec, 2020 | Medium

admin 6 months ago in

On the 19th of December, Lungelo Sikobi and I delivered a workshop on OperatorHub on Red Hat OpenShift as part of the IBM Developer Series.In the workshop, we gave an overview of Operators and OperatorHub then we moved on to the code lab where we demonstrated the OpenShift Serverless Operator. In this blog, I’m sharing an overview of the workshop which you can also watch…

Introducing ds-operator, the ForgeRock Directory Services Operator for Kubernetes | by Warren Strange | Dec, 2020 | Medium

admin 6 months ago in

Originally published at https://warrenstrange.blogspot.com on December 16, 2020. ForgeRock Directory Services 7.0 was a big achievement for the Grenoble Directory team. It is the only “Kubernetes native” directory where you can add a new replica using kubectl: kubectl scale sts/ds-idrepo — replicas=3 The 7.0 deployment is assembled using standard Kubernetes primitives such as StatefulSets, Persistent Volume Claims, and Services. This is all built and orchestrated…

Build Your Kubernetes Operator with the Right Tool | by Rafał Leszko | Nov, 2020 | Medium

admin 7 months ago in

You want to build a Kubernetes Operator for your software. Which tool to choose from? Operator SDK with Helm, Ansible, or Go? Or maybe start from scratch with Python, Java, or any other programming language? In this blog post, I discuss different approaches to writing Kubernetes Operators and list each solution’s pros and cons. All that to help you decide which tool is the right…

Kubernetes Secret and Configmap sync | by Kaan Karakaya | Oct, 2020 | Medium

admin 8 months ago in

Hi, Today I want to talk about why I wrote k8s secret sync operator and how did I Code it. Sometimes we want to use secrets in different namespaces, unfortunately, we can’t do without any helper operators or manual copying because in kubernetes secrets and configmaps are namespace. We can copy secrets and configmaps when we have a couple of namespaces and secrets. But when…