Fabian Lee : Software Engineer

Mac: bare-metal virtualization on Apple Silicon with virtualbuddy

January 5, 2024
Categories: Mac, Virtualization

The Apple Virtualization Framework (AVF) provides the ability to run completely independent virtual machines on top of M family Apple Silicon. For example, you can run multiple versions of MacOS virtualized for validating an application or its dependencies against different environments. Additionally, cloning an existing VM (with little cost thanks to APFS copy-on-write) allows you … Mac: bare-metal virtualization on Apple Silicon with virtualbuddy

Bash: indirect reference to evaluate a variable value

December 6, 2023
Categories: Linux

If you want a variable to reference another variable in Bash, that is possible using a concept called indirect reference. Below is a simple example where ‘varname’ contains the name of another variable ‘foo’. # our variable foo=bar # our reference varname=foo # the following syntax will ERROR and DOES NOT work !!! echo “${$varname}” … Bash: indirect reference to evaluate a variable value

Ansible: generating templates with deep directory structure using with_filetree

April 15, 2023
Categories: Automation

If you have a simple directory containing multiple template files that should be generated on a target host, the ‘with_fileglob‘ lookup plugin provides an easy way to render them. Below is an example rendering all the files from the ‘templates’ directory of a role. – name: create file out of every file in template directory … Ansible: generating templates with deep directory structure using with_filetree

yq: update deeply nested elements in yaml

December 20, 2022
Categories: Scripting

Mike Farah’s yq yaml processor has a a rich set of operators and functions for advanced usage. In this article, I will illustrate how to update a deeply nested element in yaml. Install yq Here are the steps for installing the latest yq on Snap enabled systems like Ubuntu/Debian. See the notes at bottom if … yq: update deeply nested elements in yaml

Kubernetes: Anthos GKE on-prem 1.13 on nested VMware environment

October 11, 2022
Categories: Kubernetes

Anthos GKE on-prem is a managed platform that brings GKE clusters to on-premise datacenters. This product offering brings best practice security measures, tested paths for upgrades, basic monitoring, platform logging, and full enterprise support. Setting up a platform this extensive requires many steps as officially documented here. However, if you want to practice in a … Kubernetes: Anthos GKE on-prem 1.13 on nested VMware environment

Kubernetes: Anthos GKE on-prem 1.11 on nested VMware environment

May 9, 2022
Categories: Hyperscaler, Kubernetes

Kubernetes: Anthos GKE on-prem 1.10 on nested VMware environment

January 7, 2022
Categories: Containers

Kubernetes: Anthos GKE on-prem 1.9 on nested VMware environment

December 5, 2021
Categories: Containers

Kubernetes: Anthos GKE on-prem 1.8 on nested VMware environment

December 4, 2021
Categories: Containers

Update Dec 2021: I have written an updated version of this article for vCenter 7.0U1 and Anthos 1.9. Anthos GKE on-prem is a managed platform that brings GKE clusters to on-premise datacenters. This product offering brings best practice security measures, tested paths for upgrades, basic monitoring, platform logging, and full enterprise support. Setting up a … Kubernetes: Anthos GKE on-prem 1.8 on nested VMware environment

KVM: Deploying a nested version of VMware ESXi 7.0 on KVM

November 18, 2021
Categories: Linux, Virtualization

If you are running KVM on an Ubuntu server, you already have an excellent Type 1 virtualization engine. Luckily, if you need to test something specific to VMware you can always run ESXi 7.0 nested inside a KVM virtual machine. In this article, I’ll be using a bare metal server running Ubuntu and KVM as … KVM: Deploying a nested version of VMware ESXi 7.0 on KVM

Kubernetes: Anthos GKE on-prem 1.4 on nested VMware environment

August 20, 2021
Categories: Containers

Update Dec 2021: I have written an updated version of this article for vCenter 7.0U1 and Anthos 1.8. Anthos GKE on-prem is a managed platform that brings GKE clusters to on-premise datacenters. This product offering brings best practice security measures, tested paths for upgrades, basic monitoring, platform logging, and full enterprise support. Setting up a … Kubernetes: Anthos GKE on-prem 1.4 on nested VMware environment

KVM: Deploying a nested version of VMware ESXi 6.7 inside KVM

September 19, 2018
Categories: Linux, Virtualization

Update Nov 2021: I have written a newer article that deploys ESXi 7.0U1. If you are running KVM on an Ubuntu server, you already have an excellent Type 1 virtualization engine. Luckily, if you need to test something specific to VMware you can always run ESXi 6.7 nested inside a KVM virtual machine. In this … KVM: Deploying a nested version of VMware ESXi 6.7 inside KVM

KVM: Bare metal virtualization on Ubuntu with KVM

August 27, 2018
Categories: Linux, Virtualization

Update September 2022: Validated these instructions on Ubuntu 22.04 If you are running an Ubuntu host, you have multiple choices for a virtualization hypervisor. I have written up several articles on using VirtualBox, but now let’s consider a bare metal hypervisor like KVM. KVM is a type 1 hypervisor implemented as a Linux kernel module … KVM: Bare metal virtualization on Ubuntu with KVM