DevOps

What is a Self-Signed Certificate? A self-signed certificate is a TLS/SSL certificate that is signed by the same entity whose identity it certifies. Unlike certificates signed by Certificate Authorities (CAs), self-signed certificates are not inherently trusted by clients or browsers. When to Use Self-Signed Certificates Development environments Internal testing and staging setups Internal services in private networks (e.g., Kubernetes clusters) ⚠️ Avoid using self-signed certificates in production for public-facing services unless you manage client trust manually. ...

How to Move K3s Data to a New Location Sometimes, you need to move K3s data to a different disk or partition — for example, when you run out of space or want to use a faster storage device. Here’s a safe way to do it. ⚠️ Prerequisites Root or sudo access Disk or mount point already prepared (e.g., /datadrive) 📦 What Will Be Moved We will migrate the following directories: ...

Basic IPVS Commands for Linux Networking IPVS (IP Virtual Server) is a powerful load balancing solution integrated into the Linux kernel. It is often used in Kubernetes environments as an alternative to iptables for service routing when kube-proxy is in IPVS mode. This guide covers the most useful IPVS commands using ipvsadm. What is IPVS? IPVS operates at the transport layer and allows you to load balance TCP and UDP traffic using multiple algorithms like round-robin, least connections, and more. ...

What is VolumeSnapshot in Kubernetes and How to Use It VolumeSnapshot is a Kubernetes feature that enables users to create point-in-time snapshots of Persistent Volumes (PVs). This functionality is essential for backup, disaster recovery, and data cloning scenarios. Why Use VolumeSnapshots? VolumeSnapshots provide: Data Protection: Easily back up data stored in PVs. Disaster Recovery: Restore volumes to a known-good state. Cloning: Create new volumes from snapshots. How VolumeSnapshots Work Snapshots are supported for specific storage classes that integrate with a CSI (Container Storage Interface) driver. The basic resources involved include: ...

Docker vs Buildah: Explained Simply Published on: 2025-08-13 When talking about containers, most people think of Docker first. But there are other players in the container world, like Buildah. Let’s break down the differences and help you decide which one fits your needs. What is Docker Docker is a platform that lets you build, ship, and run applications in containers. It includes everything: from client and server (Docker Engine) to tools for building and managing images. ...