Being a regular citizen of India who gets wooed by the meaningless debates in news channels, there was a time when I thought voting for alternative political power in India would be the solution to curbing the rampant corruption in our country. It was with time that I realized that…

Disclaimer: This is just one single case of this error. There can be other causes as well We use kube-prometheus for monitoring and alerting in our k8s clusters. This means that the alerting and recording rules in prometheus are not written by us and they come out of the box…

Our Kubernetes cluster is deployed in a private cloud. In this post, we see how ebpf helped us debug node port services timing out. Kubernetes Setup in the DC We were evaluating Kubernetes as a scheduler for our data center and as part of this, we had decided to run Kubernetes on VMs initially. The…

During my recent work on setting up Kubernetes for our org, I came across the kubernetes components authenticating with each other using ca certs. That is when I realised that digital signatures, SSL certificates, certification authority are some terms that I’ve come across regularly as a developer but never understood…

This post is not a tutorial on linux traffic control. Please refer to lartc or the traffic control howto. This article would be a howto on using linux tc with kvm/lxc guests. Background: Networking for lxc and kvm guests are configured using a host bridge solution as described here. …

We run a private cloud using proprietary software. We had implemented networking for our KVM and lxc guests using a host bridge as described here. …

I’m a developer used to intellij line of products like goland and pycharm for most of my official work. I rely heavily of keyboard shortcuts for navigation and use vim as the editor within intellij. Recently I had to analyse some kernel crash dumps in our datacenter. I’ll write about…

In case of lxc containers created on Azure VMs with networking done using host bridge mode, the containers are not able to ping other VMs in the subnet even though no NSGs are attached to either the subnet or the NICs of the VMs. How do I fix it? Add an…

I had a hard time understanding the editorial of WalkOverATree. Finally I’ve wrapped my head around it and would like to ramble about the same while being as articulate as possible. The solutions is L ≤ d ? L + 1 : min(n, 1 + d + floor((L-d)/2)) as explained…