Kubernetes

Portal | Tag Cloud | 138 assets across 31 topics

K8s core, networking, storage, RBAC, autoscaling, operators, etcd

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Core Skills (Tier 1)

Start here — these are the topics a mid-level engineer uses weekly.

• Kubernetes Core — Topic Pack ×8, Exercise Set ×2, Lab ×3, Drill, Scenario ×2, Runbook ×9, Assessment ×2, Reference ×2, Case Study ×24
• Kubernetes Pods & Scheduling — Topic Pack
• Kubernetes Services & Ingress — Topic Pack, Runbook
• Progressive Delivery — Topic Pack
• cert-manager — Topic Pack
• Container Base Images — Topic Pack

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All Content

📘 Topic Packs

Asset	Topics	Level	Time	Status
API Gateways & Ingress	API Gateways & Ingress, Kubernetes Networking	L2	5h	solid
Argo Workflows	Argo Workflows	L2	4h	solid
Chaos Engineering & Fault Injection	Kubernetes Core	L2	5h	solid
Cilium & eBPF Networking	Cilium & eBPF Networking, Kubernetes Networking	L2	4h	solid
Container Images	Container Base Images, Container Image Optimization (alias → container_images)	L1	3h	solid
CrashLoopBackOff	CrashLoopBackOff (alias)	L1	2h	solid
Database Operations on Kubernetes	Kubernetes Storage	L2	4h	solid
K8s Ecosystem	K8s Ecosystem, Kubernetes Operators	L0	6h	solid
K8s Networking	Kubernetes Networking	L1	2h	solid
K8s RBAC	RBAC	L1	2h	solid
K8s Storage	Kubernetes Storage	L1	2h	solid
Kubernetes Concept Chain	Kubernetes Core	L0	2h	solid
Kubernetes Debugging Playbook	Kubernetes Core, Kubernetes Debugging	L2	4h	solid
Kubernetes Node Lifecycle	Node Lifecycle & Maintenance	L2	4h	solid
Kubernetes Ops (Production)	CrashLoopBackOff, HPA / Autoscaling, K8s HPA (alias → k8s_ops)	L2	5h	solid
Kubernetes Pods & Scheduling	Kubernetes Core, Kubernetes Pods & Scheduling	L1	4h	solid
Kubernetes Services & Ingress	Kubernetes Networking, Kubernetes Services & Ingress	L1	4h	solid
Kustomize	Kubernetes Core, Kustomize	L1	3h	solid
Mental Models (Core Concepts)	Kubernetes Core	L0	4h	solid
Multi-Tenancy Patterns	Kubernetes Networking, RBAC, Multi-Tenancy Patterns	L2	5h	solid
Node Maintenance	Node Lifecycle & Maintenance	L1	2h	solid
OOMKilled	OOMKilled (alias)	L1	2h	solid
Platform Engineering Patterns	Kubernetes Core	L2	5h	solid
Policy Engines (OPA / Kyverno)	RBAC, Policy Engines	L2	4h	solid
Progressive Delivery	Progressive Delivery	L2	4h	solid
Service Mesh	Kubernetes Networking, Service Mesh	L3	5h	solid
The Ops of AI/ML Workloads	Kubernetes Core	L2	4h	solid
cert-manager	cert-manager	L1	3h	solid
etcd	etcd	L1	2h	solid

🏋️ Exercise Sets

Asset	Topics	Level	Time	Status
Chaos Engineering Scripts (CLI)	Kubernetes Core	L2	2h	solid
Incident Simulator (18 scenarios) (CLI)	CrashLoopBackOff, HPA / Autoscaling, OOMKilled	L2	4h	solid
Kubernetes Exercises (Quest Ladder) (CLI)	HPA / Autoscaling, Kubernetes Core, Kubernetes Networking	L1	10h	solid

🔬 Labs

Asset	Topics	Level	Time	Status
Lab: HPA Live Scaling (CLI)	HPA / Autoscaling, Kubernetes Core	L1	30m	solid
Lab: Readiness Probe Failure (CLI)	Kubernetes Core, Probes (Liveness/Readiness)	L1	30m	solid
Lab: Resource Limits OOMKilled (CLI)	Kubernetes Core, OOMKilled	L1	30m	solid

⚡ Drills

Asset	Topics	Level	Time	Status
Kubernetes Operators Drills	K8s Ecosystem	L3	30m	solid
Policy Engine Drills	Policy Engines	L2	30m	solid
Service Mesh Drills	Service Mesh	L3	30m	solid
etcd Drills	etcd	L2	30m	solid
kubectl Drills	Kubernetes Core	L1	45m	solid

🎯 Scenarios

Asset	Topics	Level	Time	Status
Adversarial Interview Gauntlet (30 sequences)	Kubernetes Core	L2	15h	solid
Interview: Deployment Stuck Progressing	Kubernetes Core, Probes (Liveness/Readiness)	L2	15m	solid
Interview: HPA Not Scaling	HPA / Autoscaling	L2	15m	solid
Interview: Ingress 404	Kubernetes Networking	L2	15m	solid
Interview: Kyverno Blocking Deploys	Policy Engines	L2	15m	solid
Interview: Pods OOMKilled	OOMKilled	L2	15m	solid
Interview: RBAC Forbidden	RBAC	L2	15m	solid
Interview: Service Mesh 503s	Service Mesh	L3	15m	solid
Interview: etcd Space Exceeded	etcd	L3	15m	solid
Scenario: etcd Troubleshooting	etcd	L3	30m	solid

📋 Runbooks

Asset	Topics	Level	Time	Status
Runbook: DNS Resolution Failure	Kubernetes Networking	L1	15m	solid
Runbook: Deployment Stuck / Rollout Stalled	Kubernetes Core	L1	15m	solid
Runbook: Disaster Recovery	Kubernetes Core	L2	20m	solid
Runbook: HPA Not Scaling	HPA / Autoscaling	L2	15m	solid
Runbook: HPA Thrashing (Rapid Scale Up/Down)	HPA / Autoscaling, Kubernetes Core	L2	15m	solid
Runbook: ImagePullBackOff	Kubernetes Core	L1	15m	solid
Runbook: Ingress 404	Kubernetes Networking	L1	15m	solid
Runbook: Ingress 502 Bad Gateway	Kubernetes Networking, Kubernetes Services & Ingress	L2	15m	solid
Runbook: Istio 503 Errors	Service Mesh	L3	15m	solid
Runbook: Kyverno Blocking Workloads	Policy Engines	L2	15m	solid
Runbook: NetworkPolicy Block	Kubernetes Networking	L2	15m	solid
Runbook: Node NotReady	Node Lifecycle & Maintenance	L1	15m	solid
Runbook: OOMKilled Container	Kubernetes Core, OOMKilled	L1	15m	solid
Runbook: PVC Stuck in Pending	Kubernetes Storage	L1	15m	solid
Runbook: Pod CrashLoopBackOff	CrashLoopBackOff, Kubernetes Core	L1	15m	solid
Runbook: Pod Eviction	Kubernetes Core	L2	15m	solid
Runbook: RBAC Forbidden	RBAC	L2	15m	solid
Runbook: Readiness Probe Failed	Kubernetes Core, Probes (Liveness/Readiness)	L1	15m	solid
Runbook: Velero Backup & Restore	Kubernetes Core	L2	15m	solid
Runbook: etcd Backup & Restore	etcd	L2	20m	solid
Runbook: etcd High Latency / Slow Operations	etcd	L3	20m	solid

📝 Assessments

Asset	Topics	Level	Time	Status
Skillcheck: Kubernetes	HPA / Autoscaling, Kubernetes Core, Probes (Liveness/Readiness)	L1	45m	solid
Skillcheck: Kubernetes Operators	K8s Ecosystem	L3	30m	solid
Skillcheck: Kubernetes Under the Covers	Kubernetes Core, Kubernetes Networking, Node Lifecycle & Maintenance	L2	45m	solid
Skillcheck: Policy Engines	Policy Engines	L2	30m	solid
Skillcheck: Service Mesh	Service Mesh	L3	30m	solid
Skillcheck: etcd	etcd	L2	30m	solid

📎 References

Asset	Topics	Level	Time	Status
Track: Kubernetes Core	Kubernetes Core, Kubernetes Networking, RBAC	L1	15h	solid
kubectl Debugging Cheatsheet	Kubernetes Core	L1	15m	solid

🔍 Case Studys

Asset	Topics	Level	Time	Status
Case Study: Alert Storm — Flapping Health Checks	Kubernetes Core	L2	30m	solid
Case Study: CNI Broken After Restart	Kubernetes Networking	L2	30m	solid
Case Study: Canary Deploy Routing to Wrong Backend — Ingress Misconfigured	Kubernetes Core, Kubernetes Networking	L2	30m	solid
Case Study: CoreDNS Timeout Pod DNS	Kubernetes Networking	L2	30m	solid
Case Study: CrashLoopBackOff No Logs	Kubernetes Core	L1	30m	solid
Case Study: DNS Looks Broken — TLS Expired, Fix Is Cert-Manager	Kubernetes Core	L2	30m	solid
Case Study: DaemonSet Blocks Eviction	Kubernetes Core, Node Lifecycle & Maintenance	L2	30m	solid
Case Study: Deployment Stuck — ImagePull Auth Failure, Vault Secret Rotation	Kubernetes Core	L2	30m	solid
Case Study: Drain Blocked by PDB	Kubernetes Core	L2	30m	solid
Case Study: Grafana Dashboard Empty — Prometheus Blocked by NetworkPolicy	Kubernetes Networking	L2	30m	solid
Case Study: HPA Flapping — Metrics Server Clock Skew, Fix Is NTP	Kubernetes Core	L2	30m	solid
Case Study: ImagePullBackOff Registry Auth	Kubernetes Core	L1	30m	solid
Case Study: Job Queue Backlog — Worker Pod CPU Throttled by cgroup	Kubernetes Core	L2	30m	solid
Case Study: Node NotReady — NIC Firmware Bug, Fix Is Ansible Playbook	Kubernetes Core	L2	30m	solid
Case Study: Node Pressure Evictions	Kubernetes Core, OOMKilled	L2	30m	solid
Case Study: Persistent Volume Stuck Terminating	Kubernetes Core, Kubernetes Storage	L2	30m	solid
Case Study: Pod OOMKilled — Memory Leak in Sidecar, Fix Is Helm Values	Kubernetes Core, OOMKilled	L2	30m	solid
Case Study: Resource Quota Blocking Deploy	Kubernetes Core	L2	30m	solid
Case Study: Service Mesh 503s — Envoy Misconfigured, RBAC Policy	Kubernetes Networking	L2	30m	solid
Case Study: Service No Endpoints	Kubernetes Core, Kubernetes Networking	L1	30m	solid
Case Study: User Auth Failing — OIDC Cert Expired, Cloud KMS Rotation	Kubernetes Core	L2	30m	solid
Ops Archaeology: The 5% That Can't Resolve	Kubernetes Networking	L2	30m	solid
Ops Archaeology: The Alerts That Stopped Firing	Kubernetes Core	L2	30m	solid
Ops Archaeology: The Cluster That Disagrees With Itself	Kubernetes Core	L2	30m	solid
Ops Archaeology: The DR That Looks Ready But Isn't	Kubernetes Core	L2	30m	solid
Ops Archaeology: The Deploy That Didn't Deploy	Kubernetes Core	L1	30m	solid
Ops Archaeology: The Job That Succeeded Wrong	Kubernetes Core	L2	30m	solid
Ops Archaeology: The Pods That Won't Schedule	Kubernetes Core	L1	30m	solid
Ops Archaeology: The Requests That Vanish	Kubernetes Networking	L2	30m	solid
Ops Archaeology: The Session Store That Keeps Dying	Kubernetes Core, OOMKilled	L2	30m	solid

Related Areas

• Docker (2 shared topics)