Admission Controllers
Mutating and validating admission controllers, request flow, enabling and disabling plugins.
ReadStudy notes on Kubernetes — from cluster architecture and networking to workloads, troubleshooting, and day-to-day operations. 27 notes
Mutating and validating admission controllers, request flow, enabling and disabling plugins.
ReadAPI versioning scheme, deprecation policy, checking and migrating deprecated APIs.
ReadPKI certificates, certificate signing requests, checking expiration, and renewal.
ReadCustom Resource Definitions, creating custom resources, and the Operator pattern.
ReadBacking up and restoring etcd snapshots, configuration, and health checks.
ReadHelm charts, repositories, releases, and Kustomize overlays for manifest management.
ReadPrerequisites, installing kubeadm/kubelet/kubectl, initializing control plane, joining workers.
Readmetrics-server installation, kubectl top for node and pod resource usage.
ReadRole-based access control, Roles, ClusterRoles, bindings, and permission checking.
ReadStep-by-step cluster upgrade process for control plane and worker nodes using kubeadm.
ReadHigh-availability control plane topologies, load balancer setup, and multi-master kubeadm configuration.
ReadContainer Runtime Interface, Container Storage Interface, and Container Network Interface — Kubernetes extensibility model.
ReadKubernetes networking model, IP ranges, pod networking, veth pairs, and bridges.
ReadClusterIP, NodePort, LoadBalancer, ExternalName, headless services, and kube-proxy.
ReadService and pod DNS records, DNS policies, CoreDNS configuration and troubleshooting.
ReadIngress controllers, IngressClass, path/host-based routing, and TLS termination.
ReadGatewayClass, Gateway, HTTPRoute, traffic splitting, and TLS — the evolution of Ingress.
ReadIngress/egress rules, pod/namespace selectors, default deny policies, and CIDR blocks.
ReadContainer Network Interface plugins, checking and installing CNI, pod CIDR configuration.
ReadPod lifecycle, common issues (Pending, CrashLoopBackOff, ImagePullBackOff), and debugging services.
ReadCluster health checks, node troubleshooting, control plane logs, and failure modes.
ReadDNS debugging, service connectivity flow, kube-proxy, network policy, and CNI troubleshooting.
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