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coolvds.com › Blog › Security & Compliance

Zero-Trust Architecture on Linux: Killing the VPN Before It Kills You

· CoolVDS Team

The perimeter is dead. In a post-Schrems II world, relying on a single VPN gateway is negligence. We break down how to implement true Zero-Trust using WireGuard, mTLS, and sovereign Norwegian infrastructure.

coolvds.com › Blog › Database Management

Database Migration: Zero-Downtime Strategies for the Paranoid Sysadmin

· CoolVDS Team

Moving a live database is like performing open-heart surgery while the patient is running a marathon. Here are the battle-tested strategies for migrating critical data to Norwegian infrastructure without triggering a 500 error.

coolvds.com › Blog › DevOps & Infrastructure

Serverless on Metal: Implementing FaaS Patterns Without the Hyperscaler Tax

· CoolVDS Team

Dissecting serverless architecture patterns for Nordic enterprises. We move beyond the AWS Lambda hype to explore self-hosted FaaS on KVM, addressing GDPR compliance, latency in Norway, and the specific configurations required to make OpenFaaS sing on CoolVDS NVMe instances.

coolvds.com › Blog › DevOps & Infrastructure

Observability vs Monitoring: Why Your "Green" Dashboard is Lying to You

· CoolVDS Team

Monitoring tells you the server is online. Observability tells you why the checkout API is failing for users in Bergen. In this deep dive, we move beyond simple uptime checks to implement full-stack observability using OpenTelemetry, Prometheus, and Grafana on high-performance infrastructure.

coolvds.com › Blog › DevOps & Infrastructure

Microservices Architecture Patterns: Building Resilient Systems in the Nordic Cloud

· CoolVDS Team

A battle-hardened guide to implementing the Circuit Breaker, Sidecar, and Saga patterns in 2023. Learn why network latency in Oslo matters, how to handle GDPR compliance with distributed databases, and why KVM-based NVMe infrastructure is non-negotiable for high-traffic clusters.

coolvds.com › Blog › DevOps & Infrastructure

Surviving the Microservices Hype: Patterns That Won't Wake You at 3 AM

· CoolVDS Team

Microservices solve scalability but introduce network chaos. Here are three battle-tested architecture patterns—Gateway Aggregation, Circuit Breaking, and Async Eventing—that prevent distributed monolith disasters. Written for the Norwegian DevOps engineer dealing with GDPR and latency constraints.