AWS CloudFormation Template to Create a VPC with Public and Private Subnets
vpc.yaml
Hands-On DevOps & Homelab Experiments
From Kubernetes and Ceph to Proxmox, Kafka, Jenkins, Vault, Android, and CI/CD, every guide here is a tested, step-by-step walkthrough from my lab.
AWS EC2, OPNsense
Create an EC2 AMI from Official OPNsense 25.1 Nano (raw) Image
This post shows how to convert the official OPNsense 25.1 Nano disk image (.img.bz2) into an EC2 AMI using VM
OPNsense
Build OPNsense 25.1.3 Nano Image from Source
OPNsense 25.1.3 is based on FreeBSD 14.2, but follow the build host version recommended by opnsense/tools for your chosen tag.
Let's Encrypt
Automatically Renew Let’s Encrypt Certificates Using Certbot on Ubuntu 24.04
Certbot is designed to automatically renew certificates before they expire. The process works as follows: To verify the timer is
Zabbix
Install Zabbix on Ubuntu 24.04
Start new shell session with root privileges. Make sure you have a database server up and running (I use MariaDB
AWS CodeBuild, Jenkins
Trigger AWS CodeBuild in Jenkins Pipeline
Your IAM user should have the policy with the following permissions: Replace ACCOUNT with your AWS Account ID. Open Jenkins
AWS CodeBuild
Build Android App from GitHub Repository Using AWS CodeBuild
Go to AWS Console → CodeBuild. Click Create project. Fill in the Project Name (e.g., android-sample-build). In Source: Inside your
Docker
Build a Docker Image and Push it to Docker Hub
Create a new file called Dockerfile: Run the following command to build your custom image: If you haven’t logged in
Docker, Jenkins
Use Jenkins Docker Plugin to Run Jenkins Jobs Inside Docker Containers
If Docker is not installed yet, install it first. Then, add Jenkins to the Docker group to allow it to
Docker
Install Docker on Ubuntu 24.04
Remove any existing Docker packages to avoid conflicts: Ensure your package index is up-to-date: Add Docker’s GPG key to verify