tech

What is high availability, and how to make your infrastructure resilient to failures?

Leave a Comment / General, Kubernetes, tech

This post demonstrates how load balancers help achieve higher availability of the control plane nodes in a simple cluster environment. The post targets the beginner audience; with the concepts, procedure, and testing. The same concepts apply to setting up a high-available Kubernetes cluster. The post is divided into three parts; feel free to skip to …

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Create a Virtual Machine with cloud-init using libvert(Automated)

Leave a Comment / General, scripting, tech

In this post, we will see an automated approach to creating a guest VM with cloud-init using libvert/virt-install. In the Previous post described here, we have seen the manual procedure. Now, we will use a shell script wrapper to do the same for our convenience. For your convenience, the script is loaded with comments, so …

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Create Virtual Machines using virt-install(libvert) with cloud-init

Leave a Comment / General, Kubernetes, scripting, tech

This post will demonstrate creating a high-performance guest VM with cloud-init using virt-install. The Qemu/libvert/KVM stack is currently the best bet to get the near-native performance from the virtual machines. When combined with cloud-init, the stack gets more empowered and highly convenient to set up virtual machines. This is especially helpful if you require creating …

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Install LoadBalancer for Kubernetes for On-Prem or Home-Lab

Leave a Comment / Kubernetes, tech

If you are having a Kubernetes cluster running in an on-prem environment, unlike managed Kubernetes solutions you must be missing the fun of having an automatic assignment of load balancer IP to your exposed services. No more pending external IP 🙂 The solution is using an on-prem load balancer. This really beefs up the capabilities …

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How to setup longhorn block storage for Kubernetes cluster

Leave a Comment / Kubernetes, tech

In this post, we will see how to install longhorn into your Kubernetes cluster. If you are not familiar with longhorn block storage, it is a production-ready block storage solution specially designed for Kubernetes. you can install longhorn on any managed Kubernetes cluster, on-prem, or even in your home lab. It is a lightweight solution …

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How to setup a validation webhook in Kubernetes?

Leave a Comment / Kubernetes, tech

This post describes how to write and configure a Kubernetes validation webhook in a Kubernetes cluster. The details about “what is a validation webhook” is described here. You can find the code used in this post on this  GitHub page. Pre-requisites: You must have admin privileges in the cluster. Some knowledge of JSON. Some knowledge …

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What is Validation Webhook in Kubernetes

Leave a Comment / Kubernetes, tech

What is a validation webhook in Kubernetes? If you are a Kubernetes administrator or learning the security and administration in the Kubernetes environment, this post is for you. Here, I have described the importance of the webhooks, and their uses, and explained how these webhooks may benefit you in administrating your cluster. The out-of-the-box Kubernetes …

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Enforcing the Container Image Download Behavior in Kubernetes

Leave a Comment / Kubernetes, tech

In this post, we will see a few ways to control and enforce the container image download behavior of Kubernetes(kubelet). We will also see the various examples with different Image Pull policies used. The Default behavior When a pod creation is requested, it will be scheduled on the most suitable node by the Kube-scheduler—the kubelet …

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