Monitoring tutorial - IT technology blog
Posted inMonitoring

How to Install and Configure Grafana Beyla: Automatic Application Monitoring Without Code Changes Using eBPF for Go, Python, and Node.js

Grafana Beyla uses eBPF to automatically collect metrics and traces from Go, Python, and Node.js applications — no code changes, no SDK installation required. This post walks through installing and configuring Beyla, and shares real-world results after 6 months running on production with Prometheus + Grafana.
Fedora tutorial - IT technology blog
Posted inFedora

Installing and Configuring Redis on Fedora Server: Handling SELinux and firewalld for High-Performance Cache Server Deployment

Redis on Fedora Server won't connect after installation — the root cause typically comes from three layers: the default localhost bind address, firewalld blocking port 6379, and SELinux enforcing mode denying network connections. This article goes straight to fixing all three, with a production security deployment checklist included.
Network tutorial - IT technology blog
Posted inNetwork

Deploying QinQ (Double VLAN 802.1ad) on Linux: Multi-Tenant Traffic Isolation and VLAN Space Expansion

QinQ (Double VLAN 802.1ad) expands the VLAN address space to ~16 million and provides fully independent traffic isolation between tenants over a single physical link. This guide covers configuring QinQ on Linux with ip link — from a 5-minute quick start to a production-ready setup with systemd-networkd — along with MTU debugging tips and a real-world intermittent packet loss story.