The potential of pod migrations in Kubernetes
How it can improve cluster utilization and prevent progress loss of stateful workloads
Nov 30, 20223 min read
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Calico config for kubeadm cluster on Azure
Contents Recently, I tried to configure calico networking on a self-managed Kubernetes cluster on Azure. It did not work out of the box and many instructions on the internet did not work for me. In the following, I want to share my setup. To set up t...
Apr 21, 20223 min read[Tutorial]: Bootsrapping your custom Kubernetes with kubeadm
Contents Requirements Build images Tag images and push to registry Kubeadm bootstrap In this tutorial, I want to show you how to bootstrap a Kubernetes cluster with kubeadm using your customized Kubernetes fork. This might be useful if you want to ...
Apr 7, 20223 min read[Tutorial]: Kubernetes stateful pod migration
Contents Why Status quo Goal Demo 1. Cluster setup Network setup VM provisioning 2. Kernel downgrade Worker 3. Install Prequisites Master node Containerd + Kubelet Kubeadm Kubectl Worker node CRIU Golang Containerd Install dependencies Systemd...
Apr 6, 202214 min read[Tutorial]: K8s Monitoring with InfluxDB's Telegraf
Contents 1. Download helm chart repo and add to helm: 2. Deploy Influxdb2 3. Add Telegraf Configuration in Influxdb 4. Deploy Telegraf 5. View metrics data 6. Connect local client with DB InfluxDB is an Open-Source timeseries database which can ...
Mar 4, 20222 min readTestable code has few mocks
Testing can sometimes seem hard and tedious. We might be faced with complex setup logic and many mocks. But this is a smell of poor code design. When properly done, mocks are rarely needed. TDD helps to avoid tight coupling and it naturally tends tow...
Nov 24, 20216 min read