Portal | Level: L1: Foundations | Topics: Kubernetes Core, Probes (Liveness/Readiness), Kubernetes Networking, Kubernetes Storage | Domain: Kubernetes

Track: Kubernetes Core

Pods, deployments, services, config, DNS, probes, scaling, RBAC.

Goals

• Deploy and manage workloads declaratively
• Debug pod lifecycle issues (CrashLoop, ImagePull, OOM, Pending)
• Understand service discovery (selectors, endpoints, DNS)
• Configure probes, HPA, resource limits
• Apply RBAC and NetworkPolicies
• Perform rolling updates and rollbacks

Prerequisites

• Concepts: container, docker, linux
• Running k3s cluster or equivalent

Primary Path (15 steps)

1. Read: training/library/skillchecks/kubernetes.skillcheck.md — controller model, desired state
2. Practice: training/interactive/exercises/levels/level-01/k8s-pods/ — pod basics
3. Practice: training/interactive/exercises/levels/level-02/k8s-deployments/ — deployments
4. Practice: training/interactive/exercises/levels/level-03/k8s-imagepull/ — image pull issues
5. Practice: training/interactive/exercises/levels/level-05/k8s-labels/ — labels and selectors
6. Practice: training/interactive/exercises/levels/level-06/k8s-ports/ — services and ports
7. Study: training/kubectl-debugging-cheatsheet.md — command reference
8. Practice: training/interactive/exercises/levels/level-12/k8s-liveness/ — liveness probes
9. Practice: training/interactive/exercises/levels/level-13/k8s-readiness/ — readiness probes
10. Lab: training/interactive/runtime-labs/lab-runtime-01-rollout-probe-failure/ — break/fix readiness probe
11. Practice: training/interactive/exercises/levels/level-14/k8s-ops (HPA)/ — horizontal pod autoscaler
12. Lab: training/interactive/runtime-labs/lab-runtime-02-hpa-live-scaling/ — live HPA scaling
13. Lab: training/interactive/runtime-labs/lab-runtime-08-resource-limits-oom/ — OOMKilled
14. Practice: training/interactive/exercises/levels/level-23/k8s-dns/ — DNS debugging
15. Read: training/library/skillchecks/kubernetes.under.the.covers.md — internals deep dive

Optional Deepening

• training/interactive/exercises/levels/level-25/k8s-networkpolicy/ — network policies
• training/interactive/exercises/levels/level-41/k8s-rbac-permission/ — RBAC
• training/interactive/exercises/levels/level-31/ through level-35 — storage (PV, PVC, StorageClass)
• training/interactive/knowledge/data/cards/kubernetes.tsv — 1900+ K8s flashcards
• devops/docs/troubleshooting.md — diagnostic guide

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Wiki Navigation

Prerequisites

• Track: Containers (Reference, L0)

Next Steps

• Track: Helm & Release Ops (Reference, L1)
• Track: Incident Response (Reference, L2)
• Track: Observability (Reference, L2)

Related Content

• Kubernetes Exercises (Quest Ladder) (CLI) (Exercise Set, L1) — Kubernetes Core, Kubernetes Networking, RBAC
• Case Study: Canary Deploy Routing to Wrong Backend — Ingress Misconfigured (Case Study, L2) — Kubernetes Core, Kubernetes Networking
• Case Study: Persistent Volume Stuck Terminating (Case Study, L2) — Kubernetes Core, Kubernetes Storage
• Case Study: Service No Endpoints (Case Study, L1) — Kubernetes Core, Kubernetes Networking
• Interview: Deployment Stuck Progressing (Scenario, L2) — Kubernetes Core, Probes (Liveness/Readiness)
• Kubernetes Ops (Production) (Topic Pack, L2) — Kubernetes Networking, Probes (Liveness/Readiness)
• Lab: Readiness Probe Failure (CLI) (Lab, L1) — Kubernetes Core, Probes (Liveness/Readiness)
• Multi-Tenancy Patterns (Topic Pack, L2) — Kubernetes Networking, RBAC
• Runbook: Readiness Probe Failed (Runbook, L1) — Kubernetes Core, Probes (Liveness/Readiness)
• Skillcheck: Kubernetes (Assessment, L1) — Kubernetes Core, Probes (Liveness/Readiness)

Pages that link here

• Kubernetes - Skill Check
• Kubernetes Storage - Primer
• Kubernetes Under the Covers
• Multi-Tenancy Patterns
• Observability
• Primer
• Primer
• RBAC - Primer
• Runbook: PVC Stuck in Pending
• Runbook: RBAC Forbidden Error
• Runbook: Readiness Probe Failed
• Scenario: Deployment Stuck Progressing
• Scenario: RBAC Forbidden Error During Deploy
• Symptoms
• Symptoms