29 — The 10-Day Confidence Sprint: Revise · Do · Prove¶

Ye chapter kab padhen: Jab concepts clear ho chuke hain aur ab haath ka bharosa (confidence) chahiye — real project pe karke, recall karke, bol ke. Ye 27 — 10-Day Learning Plan ka agla step hai.

27 — Learning Plan = pehli baar — restaurant analogy se sab connect karo (understand).

29 (yeh) — Confidence Sprint = dusri baar — padhna band, karo + recall karo + bolo (drill).

The one honest truth about this sprint¶

Tera content gap mein nahi hai — execution mein hai.

Is handbook mein 28 module hain: recall gates, flashcards, incident playbook (26 issues), 2 capstones, chaos engineering. Ye kisi paid bootcamp se behtar hai. Par agar progress.md ke checkbox untick hain aur spaced-review log khaali hai — to matlab padha bahut, drill nahi kiya. Aur confidence content se nahi, reps se aata hai.

Ye 10 din isi ek cheez ke liye hain: har concept ko apne do real projects pe karo — VANTA-Boutique (kind, local) aur Billfree-techops (AWS, production) — padho mat, karo.

Before Day 1 — dono projects chalte hue chahiye

Ye sprint maanta hai ki VANTA aur Billfree tumhare paas clone + running hain. Agar nahi: pehle Lab A · BillFree ke Part 1–3 (clone → local run → Docker) aur Lab B · VANTA ka kind-cluster setup karo — wahi guided path hai in repos ke liye. Bina running project ke sprint "padhna" ban jaayega — exactly jo hum avoid kar rahe hain.

🎨 Visual dashboard

Isi sprint ka ek interactive, daily-open dashboard bhi hai: 10_Day_Confidence_Sprint.html (repo root). Roz kholo, aaj ka din expand karo, 3 lanes karo, tick karo. Ye chapter reference + progress tracking ke liye; wo daily driver ke liye.

Gap analysis — saaf baat (jo actually gaps hain)¶

Bucket	Kya	Sprint mein
✅ Poora + gehra	Linux, Git, Docker, K8s core+config+storage, CI/CD, GitOps, Helm, Kustomize, Terraform, Ansible, Observability, Incident playbook, Chaos	Bas drill karo
⚠️ Patla (concept hai, hands-on kam)	Secrets maturity (Vault / SealedSecrets / External Secrets), Service mesh (Istio/mTLS), Azure/AZ-900	Ek mini-lab / abhi optional
⏭️ Abhi skip (10-din ke baad)	Roadmap M11–M18 — progressive delivery, supply-chain security, distributed systems	Baad mein

🇮🇳 Hinglish intuition: Tere paas gadi (content) already hai — bas chalayi nahi. Ye sprint driving lessons hai, nayi gadi kharidna nahi.

Har din ka format — 3 lanes¶

Har din yehi teen lanes, isi order mein. Kabhi sirf padho mat.

Lane	Time	Kya
↩️ Revise	~15 min	Us din ke chapter ka recall gate memory se — dobara padho nahi, dobara nikaalo. Yehi active recall hai (spaced-review system).
▸ Do	60–90 min	Terminal kholo. VANTA/Billfree pe actual commands. Todo, banao, badlo. Haath se — koi tumhare liye execute na kare.
✅ Prove	~15 min	Blank page pe diagram banao, ya loud bolo jaise interview mein. Atka? Wahi kal ka revise.

The 10-day map¶

flowchart LR
  D1["Day 1\nLinux·Git·Docker"]:::a
  D2["Day 2\nK8s Core"]:::a
  D3["Day 3\nConfig·Secret·Storage"]:::b
  D4["Day 4\nNetworking"]:::c
  D5["Day 5\nCI/CD"]:::c
  D6["Day 6\nGitOps·Helm"]:::d
  D7["Day 7\nTerraform·Ansible"]:::e
  D8["Day 8\nObservability"]:::b
  D9["Day 9\nBreak & Fix"]:::e
  D10["Day 10\nEnd-to-end + Interview"]:::c
  D1-->D2-->D3-->D4-->D5-->D6-->D7-->D8-->D9-->D10
  classDef a fill:#e8f5e9,stroke:#2e7d32,color:#1b5e20
  classDef b fill:#fff3e0,stroke:#e65100,color:#bf360c
  classDef c fill:#e3f2fd,stroke:#1565c0,color:#0d47a1
  classDef d fill:#f3e5f5,stroke:#6a1b9a,color:#4a148c
  classDef e fill:#fce4ec,stroke:#880e4f,color:#880e4f

Day 1 — Fundamentals drill: Linux · Git · Docker¶

zameen pakki karo

↩️ Revise (15 min)▸ Do (60–90 min)✅ Prove (15 min)

21 — Linux toolkit + 04 — Docker ke recall gates, memory se
Ek line: image vs container vs registry vs layer?

VANTA: frontend ka Dockerfile padho → docker build → docker run → browser
docker exec -it <id> sh — andar ghuso, files/env dekho
Linux debug drill: top, df -h, ss -tlnp, journalctl, tail -f
Git: branch banao → change → commit → merge → git log --oneline

Blank page: Dockerfile → build → image → run → container flow likho
Loud bolo: "layer caching se rebuild fast kaise hota hai?"

📖 21-linux-toolkit · 04-M3-docker · 22-command-cheatsheets

Day 2 — Kubernetes Core: self-heal, scale, rollout¶

cook + manager + counter

↩️ Revise▸ Do✅ Prove

05 — K8s Core + 26 — Objects map recall gates
Pod vs ReplicaSet vs Deployment — kaun kya, labels ka role?

VANTA (kind ready hai): kubectl get pods,deploy,svc,rs -L app — label flow dekho
Self-heal: kubectl delete pod <frontend-pod> → khud wapas aata hai
Scale: kubectl scale deploy frontend --replicas=4 → watch
Rollout: image badlo → kubectl set image → kubectl rollout status → kubectl rollout undo

Blank page: self-heal loop (desired vs actual → controller → new pod)
Loud: "rolling update mein zero downtime kaise?"

📖 05-M4-kubernetes-core · 26-k8s-objects-map

Day 3 — Config · Secret · Storage: break & fix¶

masala + pantry

↩️ Revise▸ Do✅ Prove

ConfigMap vs Secret vs PVC — kab kaun? (visual: Helm_ConfigMap_Secret_Init_samjho.html)

VANTA: ek ConfigMap banao, frontend env usse inject karo, restart, verify
Secret banao kubectl create secret generic → Pod mein secretRef
Billfree: postgres StatefulSet + volumeClaimTemplates padho — PVC lifecycle
Break: galat secret key do → Pod fail → describe/logs se fix

Loud: "Secret Git mein kyun nahi? base64 encryption kyun nahi?"
Pod restart pe PVC ka data kyun bacha rehta hai — samjhao

📖 05-M4-kubernetes-core (config/storage) · 11-M9-advanced-k8s-internals

Day 4 — Networking: Service · Ingress · DNS · NetworkPolicy¶

request → pod tak

↩️ Revise▸ Do✅ Prove

Service 4 types, CoreDNS, kube-proxy, Calico

VANTA: pod-to-pod — ek pod mein exec → wget cartservice:7070 — DNS se baat
kubectl get svc,endpoints — Service ke peeche kaunse pod IPs
Billfree: ingress-nginx + host/path routing padho; NetworkPolicy yaml
Break: Service ka selector label galat karo → traffic gir jaye → fix

Blank page: User → DNS → Ingress → Service → Pod — poora hop draw
Loud: "Calico vs Service — kaun packet ko kahan pahunchata?"

📖 11-M9-advanced-k8s-internals · 20-confusions-and-tradeoffs

Day 5 — CI/CD: follow one commit¶

test kitchen

↩️ Revise▸ Do✅ Prove

CI vs CD, runner, image tag handoff, Trivy scan — kyun zaroori

Billfree: .github/workflows padho — test → build → push → tag update
Ek chhota code change → push → GitHub Actions run live dekho
Trace: image kahan build/push hui, config repo mein tag kaise badla
VANTA (local): docker build → kind load → kubectl set image

Loud: "CI cluster ko touch kyun nahi karta? handoff kahan hai?"
Blank page: git push → … → running pod (har box likho)

📖 07-M6-cicd · 19-cicd-hands-on-flow

Day 6 — GitOps + Helm: ArgoCD sync & drift¶

manager + meal deal

↩️ Revise▸ Do✅ Prove

Pull vs push CD, auto-sync, self-heal, prune; Helm chart vs values (visual: Helm_ConfigMap_Secret_Init_samjho.html)

VANTA: ArgoCD kind pe install → Application connect → sync dekho
Drift test: kubectl scale se manually badlo → ArgoCD wapas Git jaisa kar de
Billfree: Helm chart + values structure padho; helm template se rendered YAML
ApplicationSet + app-of-apps pattern samjho

Loud: "rollback GitOps mein kaise? (git revert)"
Kustomize vs Helm — ek line mein farak

📖 08-M7-gitops · 28-helm-real-projects

Day 7 — Outer loop: Terraform · Ansible · AWS¶

building banao

↩️ Revise▸ Do✅ Prove

IaC kyun, state file, plan-before-apply, idempotency, push vs pull

Billfree: infra/terraform padho — compute, network, cloud-init (kubeadm)
terraform plan chalao — kya banega, state kya kehti hai
Safe lab: ek S3 bucket apply → verify → destroy
Ansible playbook padho — nodes pe kya configure hota (containerd, kubeadm)

Loud: "Terraform → Ansible → K8s — kaun kya banata, handoff kahan?"
tfstate delete ho jaye to kya hota — samjhao

📖 02-M1-terraform · 03-M2-ansible · 06-M5-sizing-and-cost

Day 8 — Observability & SRE: 2 a.m. drill¶

health inspector

↩️ Revise▸ Do✅ Prove

RED vs USE metrics, logs vs metrics vs traces, SLO/alert

VANTA: kube-prometheus-stack Helm se install → Grafana port-forward
4 dashboards: compute, networking, node-exporter, ArgoCD
Billfree: ServiceMonitor + PrometheusRule padho — thresholds (error 5%, p95 1s)
Load daalo (loadgenerator) → CPU/latency graph move karte dekho

Loud: "app slow hai — main pehle kya dekhun, kis order mein?"

📖 10-M8-observability-sre

Day 9 — Break & fix: Incident + Chaos¶

yahi confidence deta hai

↩️ Revise▸ Do — jaan-boojh ke todo, phir fix karo✅ Prove

Debug order: describe → events → logs --previous → root cause
Exit codes: 137 (OOM/SIGKILL), 1, 0 — kya matlab

VANTA — CrashLoop: liveness timeout 1s karo → CrashLoop → diagnose → fix
OOMKilled: memory limit bahut kam karo → 137 → badhao
ImagePullBackOff: galat image tag → describe se pakdo
PVC Pending / Service no endpoints: playbook ke 26 issues mein se 5 chuno

Har issue: symptom → diagnose command → fix → prevent — likho
Ye war-stories interview mein sona hai

📖 23-production-incident-playbook · 25-production-gauntlet-chaos

Day 10 — Grand opening: end-to-end + interview¶

sab jodo, bolo

↩️ Revise▸ Do — one commit to prod✅ Prove — the final test

09 — Connected System: 2 loops + 8 bridges + 5 golden threads

Billfree: ek chhota change → push → CI green → ArgoCD sync → Grafana check — poora flow ek baar khud
VANTA + Billfree dono ka README/docs polish — portfolio ready

Blank page (no notes): 2 loops + 8 bridges + 5 threads draw karo
Whiteboard talk: "git push se user tak" 10 min bolo, loud
STAR stories: VANTA aur Billfree se 3 real "maine kya kiya" answers likho

📖 09-connected-system · 14-interview-bank · 18-career-job-ready

Har din chalta rahega — the recall habit¶

🔁 5-min daily recall (ye chhodna mat)

Kab	Kya
Subah	Kal wale din ka recall gate — memory se, 5 min
Din mein	Aaj ka Do lane — haath se, terminal pe
Raat	17 — Flashcards — us din ke module ke, 5 min
progress.md	Aaj ke checkbox tick karo — dikhta progress hi motivation hai

10 din baad — "confident" ka matlab¶

Padha nahi — kiya. Har din progress tick hua, har concept apne project pe chala.
Recall aaya. Blank page pe 2 loops + 8 bridges bina notes ke bana sakte ho.
Bol sakte ho. "git push se user tak" 10 min whiteboard pe, + VANTA/Billfree ki 3 STAR stories.
Toota, phir theek kiya. CrashLoop/OOM/502 khud banaye aur fix kiye — yehi "2.5-saal experience" dikhna hai.

🇮🇳 Final baat: Ye sprint ka maqsad naya seekhna nahi — jo aata hai use haath aur zubaan mein laana hai. Har din: revise karo (memory), karo (terminal), prove karo (blank page + loud). 10 din baad tum confident nahi mehsoos karoge — confident hoge.

Connected pages: 27 — 10-Day Learning Plan (conceptual) · 09 — Connected System · 23 — Incident Playbook · 17 — Flashcards · progress.md