Linux · 8 min
Logical Volume Management (LVM) in Linux
Add a disk to a VirtualBox VM and take it through every LVM layer: partition, physical volume, volume group and logical volume, then an ext4 mount in fstab.
virtualbox
6 notes
Kubernetes · 22 min
Kubernetes Cluster Setup with kubeadm and Amazon EKS
Build a three-node Kubernetes cluster with kubeadm on EC2 or VirtualBox, resolve common CNI and certificate errors, then create an Amazon EKS cluster and deploy a multi-tier app.
Kubernetes · 16 min
Kubernetes with minikube: Pods, Deployments and Services
Set up a local Kubernetes cluster with minikube, then create pods, ReplicaSets and Deployments from YAML, roll updates forward and back, and expose nginx with Services.
Docker · 10 min
Docker Swarm: Building a Cluster with Vagrant
Build a Docker Swarm cluster on Vagrant VMs, then initialise it, join nodes, run and scale services, and use overlay networks and volumes in swarm mode.
Infrastructure as Code · 8 min
Vagrant for Local VMs: Vagrantfile, Commands and SSH Shortcuts
Create and manage VirtualBox VMs with Vagrant: an Ubuntu 24.04 Vagrantfile, daily commands, synced folders, provisioning, and SSH config and aliases to reach VMs from anywhere.
Linux · 7 min
Introduction to Linux: Kernel, Shell, File System and SSH Login
The Linux foundations behind DevOps work: kernel and shell, distributions, the directory layout, the seven file types, and SSH login to a VirtualBox VM.