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DevOps

Managed PostgreSQL vs Self-Hosting: Which Should You Choose?

Managed PostgreSQL or self-hosted? Compare backups, PITR, failover, upgrades, monitoring, security and total cost, plus when running it yourself makes sense.

Sep 25, 20266 min read

DevOps

Multi-Layer Load Balancing: DNS, Anycast and Ingress

How multi-layer load balancing works from DNS to pod: scaling the ingress controller, DNS round-robin limits, GSLB and geo routing, Anycast with BGP, Cloudflare pools, and externalTrafficPolicy.

Sep 24, 202610 min read

DevOps

Running Kafka with KRaft on Kubernetes: A Practical Setup

A practical guide to Kafka KRaft on Kubernetes: broker and controller roles, ZooKeeper vs KRaft, replication and min.insync.replicas, StatefulSet with a headless Service, and advertised listeners.

Sep 24, 202610 min read

DevOps

Kubernetes Operator and CRDs: Build a Reconcile Loop in Go

Learn how a Kubernetes operator works: define CRDs, write a controller with a level-triggered reconcile loop, and build a small database operator in Go with kubebuilder, plus a kopf example.

Sep 24, 202610 min read

DevOps

Kubernetes Probes and CrashLoopBackOff: A Debugging Guide

Learn what CrashLoopBackOff really means, how liveness, readiness and startup probes work, and a step-by-step routine to debug it with describe, logs --previous, events and exit codes.

Sep 24, 202610 min read

DevOps

Kubernetes Rolling Update: Zero-Downtime Deployments

Make a Kubernetes rolling update truly zero-downtime: tune maxSurge and maxUnavailable, add readiness probes, graceful shutdown and a preStop hook, set PodDisruptionBudgets, and roll back safely.

Sep 24, 202610 min read

DevOps

Kubernetes Requests and Limits: Scheduling and QoS

How Kubernetes requests and limits drive scheduling, why CPU gets throttled but memory gets OOMKilled, how QoS classes affect eviction, and how to spread pods with anti-affinity and topology rules.

Sep 24, 202610 min read

DevOps

Kubernetes Autoscaling: HPA, VPA and Cluster Autoscaler

How Kubernetes autoscaling works across three layers: the HPA formula with a worked example, choosing metrics, right-sizing with VPA, adding nodes with Cluster Autoscaler, and common pitfalls.

Sep 24, 202610 min read

DevOps

Kubernetes Ingress: Host Routing, IngressClass and TLS

Learn how Kubernetes Ingress routes HTTP traffic by host and path, how IngressClass picks a controller, and how to automate TLS with cert-manager, plus what Ingress can't do.

Sep 24, 202610 min read

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