Level up with Kubernetes

What you should know

Troubleshooting effectively with the many whys

Finding problems quickly with Spot the Pattern

Kubernetes is hard. Why

kubectl, curl, and yq are all you need

Installing kind and troubleshooting tools

Installing Docker Desktop

Creating clusters with kind

Debugging missing Pod tolerations and taints

Troubleshooting Pods that won't fit in the cluster

Solving network-related ImagePullBackOff errors

Debugging ImagePullBackOff errors for non-existent images

Debugging failing liveness probes

Conquering Pods with pending dependencies

Debugging CrashLoopBackOff errors and crashing Pods

Solving ImagePullBackOff errors related to private registries

Solving failing Pod readiness checks

Challenge A troublemaking deployment

Solving slow Pods

Solution A troublemaking deployment

Debugging Pods running outdated Alpine Linux

Conquering DNS misconfigurations within Pods

Conquering CoreDNS and other DNS issues

Troubleshooting NetworkPolicies

Troubleshooting Pod networking

Debugging unreachable Kubernetes Services

Solving failing Ingress resources

Challenge The flaky web app

Troubleshooting Ingress resources with unavailable services

Debugging aggressive ingress path types

Solution The flaky web app

Why Kubernetes authentication issues occur

Confirming kubeconfig certificate validity

Quick refresher on kubeconfig files

Retrieving user certificates from kubeconfig files

Retrieving data from kubeconfig contexts

Generating new Kubernetes user certificates

Understanding NotReady Kubernetes nodes

Identifying kubelets that are not started

Understanding slow kubectl commands

Restarting the kubelet service

Troubleshooting missing CNIs

Understanding slow Kubernetes resource deletions

Safely removing Kubernetes resource finalizers

Removing finalizers from namespaces

Identifying Kubernetes resource finalizers

Deploy your next big project on Kubernetes

Provision your own Kubernetes cluster from scratch

Get Kubernetes certified