Migrating Kubernetes Cluster Networking from Flannel to Calico
Preparing the Calico Configuration
To begin the migration, download the Calico manifest that utilizes etcd as the datastore. This is common in custom-provisioned clusters where etcd is managed independently.
curl https://docs.projectcalico.org/manifests/calico-etcd.yaml -o calico-config.yaml
Configuring etcd Secrets and Endpoints
Calico needs ...
Posted on Thu, 06 Aug 2026 16:05:04 +0000 by Marijnn
Deploying a Single-Node Kubernetes Cluster with kubeadm
Prerequisites
Before starting, ensure you're machines meet these requirements:
One or more machines running CentOS 7.x (x86_64)
Hardware: minimum 2GB RAM, 2 CPUs, 30GB disk space
Network connectivity between all machines
Internet access for pulling container images
Swap disabled
Objectives
Install Docker and kubeadm on all nodes
Initialize t ...
Posted on Fri, 29 May 2026 21:10:42 +0000 by phrozenflame
Installing Kubernetes with kubeadm Using Vagrant
Setting Up a Kubernetes Cluster with kubeadm
Infrastructure Overview
We will create a Kubernetes cluster using Vagrant. The environment consists of three CentOS-based virtual machines:
Hostname
IP Address
master1
192.168.33.11
node1
192.168.33.12
node2
192.168.33.13
Vagrantfile Configuration
Below is the Vagrantfile used to define ...
Posted on Thu, 21 May 2026 20:42:59 +0000 by programmingjeff
Kubernetes and Istio Setup in VirtualBox
Prerequisites
Download the folllowing files for Kubernetes and Istio setup:
Oracle VM VirtualBox
k8s-base.ova (Base Kubernetes image)
istio-integrated.ova (Pre-configured Istio image)
istio-1.11.1-linux-amd64.tar.gz
kube-flannel.yaml
Virtual Machine Setup
Import the base Kbuernetes OVA file into VirtualBox:
Launch VirtualBox and select File ...
Posted on Sun, 10 May 2026 06:14:30 +0000 by artic