Practical Kubernetes tutorials covering cluster installation, workloads, networking, storage, scaling, security, and operations.
Fast Kubernetes troubleshooting follows evidence, not guesses: identify the failing layer, read current state and events, inspect logs including the previous container, test DNS and Service endpoints, then change one thing and…
A StatefulSet gives Pods stable identities and per-replica claims. This single-replica PostgreSQL lab demonstrates a headless Service, Secret-backed password, volumeClaimTemplates, readiness, backup, and controlled deletion.
Scheduling controls decide where a Pod may or should run. This lab labels a node, demonstrates required node affinity, protects a dedicated node with a NoSchedule taint, and adds a matching toleration.
Requests influence scheduling; limits constrain runtime use. Readiness controls traffic, liveness restarts a stuck container, and startup probes protect slow initialization. This manifest makes all four behaviors explicit.
The HorizontalPodAutoscaler changes replica count from observed metrics. This guide installs Metrics Server, deploys a workload with CPU requests, creates an autoscaler, generates load, and watches scale-up and scale-down.
RBAC answers whether an authenticated identity may perform an API action. This lab creates a namespace-scoped read-only ServiceAccount, binds a Role, verifies allowed and denied verbs, and avoids distributing cluster-admin credentials.
Pod Security Admission can enforce baseline or restricted Pod Security Standards per namespace. This lab labels a namespace for restricted enforcement and deploys a workload that runs non-root with no added capabilities…
Helm renders parameterized Kubernetes manifests and tracks releases. This guide installs the client, creates a small chart, renders it locally, installs atomically, upgrades values, inspects history, and rolls back.
PersistentVolumes represent storage capacity, PersistentVolumeClaims request it, and StorageClasses define dynamic provisioning behavior. This lab uses a hostPath PV only to make the binding lifecycle visible on a single-node lab.
The NFS subdir external provisioner dynamically creates a subdirectory for each PVC on an existing NFS export. This guide validates the export, installs the maintained Helm chart, creates a claim, and tests…
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