A brief Introduction to Cgroups in Linux
Nov 13, 2024
What is it? cgroups (abbreviated from control groups) is a Linux kernel feature1 that limits, accounts for, and isolates the resource (i.e CPU, memory, disk I/O, and network) usage of a collection of processes. It is essential for managing resource allocation in modern systems, especially in environments that require efficiency and isolation like containers, virtual machines, and multi-user servers. We can create multiple cgroups with parent-child relationships, as it is organized in a hierarchical structure.…
A Brief Introduction to the Test Pyramid
Oct 25, 2024
The Testing Pyramid1 is a conceptual framework that helps software developers and quality assurance (QA) teams optimize the process of ensuring software quality. By structuring different types of automated tests into a pyramid, it emphasizes focusing on fast, low-level tests like unit tests at the base, progressing to more comprehensive but slower integration tests, and finally minimal end-to-end tests at the top. This approach reduces the time needed to identify issues in the code and enhances the reliability of the test suite by offering rapid feedback on code changes, ensuring that new features don’t break existing functionality.…
Cloud Deployment Models
Oct 20, 2024
What is Cloud computing? Cloud computing may be desribed as the on-demand availability of IT resources via the internet, with a pay-as-you-go pricing model. Instead of purchasing, owning, and managing physical data centers and servers, you can use technology services like computing power, storage, and databases as needed from a cloud provider. This approach allows educational institutions to avoid tasks such as hardware procurement, maintenance, and capacity planning. When adopting cloud solutions, organizations can choose between several models: single cloud, hybrid cloud, and multicloud.…
Building Docker Images in Kubernetes with Kaniko for Jenkins CI
Jul 28, 2024
Kaniko in Kubernetes with Jenkins The Case for Kaniko If we need to build a Docker image inside a k8s cluster, Kaniko is the tool for the job. I tried using k8s agent executers in Jenkins on my k3s cluster running on Linux containers. Since I’m running containerd as the container runtime in k3s, and did not want to run a priviledged container for building the images, I did some research on the subject, which made me stumble upon Kaniko1.…
Kubernetes Setup on Proxmox with K3s, Terraform and Ansible
Jul 17, 2024
Kubernetes (aka K8s) vs K3s K3s is a lightweight K8s distribution suitable for edge computing and resource-constrained environments where a low resource footprint is sought. When combined with Proxmox, a powerful open-source virtualization platform, it allows for efficient and flexible cluster management. Utilizing Terraform for infrastructure provisioning and Ansible for configuration management streamlines the deployment process, ensuring a consistent and repeatable setup. Prerequisites Assuming we have Proxmox VE, along with Terraform and Ansible installed on their, we need to ensure our Proxmox server has a properly configured network bridge to allow communication between VMs and the external network.…
Common Deployment Strategies
Jul 14, 2024
Once we have the our code ready to be deployed, there are multiple ways that we could proceed with the deployment. This post looks into some of the most common deployment strategies. Big Bang Deployment This is one of the earliest methods of deployments, where we deploy all our changes at once, causing some downtime while we transition from the old system to the new. While usually short, the downtime depends on the scale of the system.…