Tutorials
In-depth technical tutorials, guides, and infrastructure best practices.
KEDA Troubleshooting: ScaledObject Ready, Auth, and Scaling Delay Fixes
Fix KEDA ScaledObject Not Ready errors, TriggerAuthentication failures, HPA conflicts, and scaling delays with this KEDA troubleshooting guide.
PostgreSQL 18 AIO Tuning Guide: io_uring vs Worker vs Sync
Learn PostgreSQL 18 AIO tuning: install PostgreSQL 18.6, benchmark sync, worker, and io_uring, and tune effective_io_concurrency with real NVMe test results.
Install Proxmox VE 9.2: ZFS Mirror Setup on a Dedicated Server
Install Proxmox VE 9.2 on a dedicated server: ZFS mirror storage, network and hostname setup, free HTTPS certificate, updates, and your first VM.
Kueue GPU Topology Aware Scheduling: Install, Configure, Run AI Jobs
Learn Kueue GPU topology-aware scheduling: install Kueue, set up ResourceFlavors, ClusterQueues, and TAS so multi-GPU AI jobs avoid fragmented, pending clusters.
How to Split and Share GPUs in Kubernetes Using NVIDIA GPU Operator
Learn how to share NVIDIA GPUs in Kubernetes using the GPU Operator's time-slicing and MIG features, with config maps, node labels, test pods, and utilization checks.
Event-Driven Autoscaling on K3s with KEDA, RabbitMQ, and Prometheus
Learn how to install KEDA on K3s and autoscale two real workers: one on RabbitMQ queue depth, one on Prometheus metrics. Full setup, ScaledObjects, and verification.
Kubernetes Disaster Recovery Drill: Restore Test With Velero/Longhorn
Run a real Kubernetes disaster recovery drill: destroy a K3s cluster, then restore etcd, Velero resources, and Longhorn volumes on new servers, with RPO/RTO checks.
The Complete Longhorn Troubleshooting Guide for Kubernetes Storage
Fix Longhorn degraded volume issues with this step-by-step guide covering failed replicas, stuck attachments, disk pressure, engine image errors, and backup target failures.
Enforce Signed Container Images in Kubernetes with Cosign and Kyverno
Learn how to sign container images with Cosign, store the signature in your registry, and use Kyverno's ImageValidatingPolicy to block unsigned images from running in Kubernetes.
How to Run GPU Workloads on K3s Using NVIDIA GPU Operator 26.7
Learn how to install NVIDIA GPU Operator 26.7 on K3s for bare-metal servers, verify drivers, container toolkit, device plugin, and DCGM Exporter, then run a real CUDA test workload.
Migrate Kyverno ClusterPolicy Rules to CEL Policies Before v1.20
Kyverno drops ClusterPolicy in v1.20. Learn how to migrate Kyverno ClusterPolicy to CEL with real ValidatingPolicy, MutatingPolicy, GeneratingPolicy, and ImageValidatingPolicy examples with staged rollout and PolicyException migration.
Fix SecretStore, Auth, and Sync Failures in External Secrets Operator
Fix External Secrets Operator errors: SecretStore not Ready, provider auth failures, missing keys, stale secrets, refresh issues, and RBAC problems.