#2026

9 tutorials tagged with "2026"

Kubernetes 1.35 Will Not Boot Your cgroup v1 Nodes. Check Before You Type Upgrade.

KEP-5573 turns failCgroupV1 on by default. 1.35 is also the last release that speaks containerd 1.x. Here is the stat command and the part the blogs disagree on.

devops

ZcopyReaper Is in RDS Zerocopy. User Namespaces Will Not Save You

CVE-2026-43502 is a local root in the RDS zerocopy path, present since Linux 4.17. Mainline fix is 7.1-rc3. Ubuntu lists 7.0.0-28, 6.8.0-136, and 5.15.0-186. Restricting user namespaces does nothing.

security

Fragnesia Is a Host Breakout. If Your GKE Nodes Are Ubuntu, Read the Bulletin

CVE-2026-46300 lets an unprivileged process inside a container reach root on the host. Google says Standard plus Ubuntu is in. COS, Autopilot, and GKE Sandbox are out. Patch versions are on GCP-2026-033.

docker

Docker VMM: How to Switch to Docker's New Virtualization Engine

Docker has replaced its third-party virtualization library with a first-party hypervisor. Here's what changed, why it matters, and how to switch.

docker

Docker Container Has No Internet? A Systematic Guide to Diagnosing and Fixing Network Issues

Your Docker container can't reach the outside world. Before you start randomly changing settings, follow this systematic diagnostic workflow to identify whether the problem is DNS, routing, firewall rules, or IP forwarding — and fix it correctly the first time.

troubleshooting

Platform Engineering in 2026: Building an Internal Developer Platform That Actually Works

Stop drowning in Kubernetes YAML. Platform engineering gives developers self-service infrastructure without the DevOps bottleneck. Here's how to build one.

devops

Systemd Service Management in 2026: Best Practices for Production Servers

A complete guide to creating, managing, and hardening systemd services for production Linux environments. Covers unit file structure, logging, security sandboxing, and resource limits.

linux

Microsoft's July 2026 Patch Tuesday: 570 Flaws, 3 Zero-Days, and Why Your Patching Window Just Shrunk

Microsoft dropped a record-breaking 570 security fixes this Patch Tuesday, including two actively exploited zero-days. But the real story is why patch volumes are exploding — and what AI-powered exploit generation means for server admins.

security

Cloud Server Performance Optimization in 2026: A Practical Guide for DevOps Teams

Step-by-step techniques for optimizing cloud server performance in 2026 — from resource allocation and container tuning to AI-driven scaling and cost-performance tradeoffs.

devops