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Cheat Sheets

Quick-reference cards for each topic area. Use alongside drills and topic packs for study.

Available Cheat Sheets

Topic Focus Areas File
Service Mesh Istio architecture, traffic mgmt, mTLS, port naming service-mesh.cheatsheet.md
GitOps & ArgoCD Applications, sync policies, App-of-Apps, sync waves gitops-argocd.cheatsheet.md
Secrets Management Sealed Secrets, SOPS, ESO, Vault, rotation secrets-management.cheatsheet.md
K8s Operators CRDs, Kubebuilder, reconciliation, finalizers k8s-operators.cheatsheet.md
Database Ops StatefulSets, pg_dump, PVC ops, CloudNativePG database-ops.cheatsheet.md
FinOps VPA, quotas, spot instances, right-sizing finops.cheatsheet.md
Cloud Deep-Dive IRSA, Workload Identity, VPC, ALB/NLB, storage cloud-deep-dive.cheatsheet.md
Alerting Rules PromQL alerts, recording rules, Alertmanager routing alerting-rules.cheatsheet.md
Postmortem & SLO SLI/SLO/SLA, error budgets, burn rate, templates postmortem-slo.cheatsheet.md
Container Debug crictl, nsenter, strace, /proc inspection containers-deep-dive.cheatsheet.md
TLS & PKI cert-manager, openssl, ACME challenges tls-pki.cheatsheet.md
Policy Engines Kyverno, OPA Gatekeeper, Pod Security Standards policy-engines.cheatsheet.md
etcd Ops Backup/restore, space recovery, health checks etcd-operations.cheatsheet.md

How to Use

  • Before an interview: Skim all cheat sheets for quick recall
  • During study: Use as a reference while working through drills
  • On the job: Quick lookup for commands and patterns