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Welcome to the 90 Days of DevOps Challenge! I'll covers everything from Linux basics to advanced cloud-native DevOps.

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# 🌟 90 Days of DevOps — Challenge Roadmap

Welcome to the **90 Days of DevOps Challenge**!  
This journey takes you from **Linux basics** ➝ **Cloud-native DevOps mastery**.

Each day unlocks a new concept with hands-on learning, so by Day 90 you’ll have a **portfolio-ready, production-grade DevOps setup**.

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## 🗓️ Daily Topics

### 🔹 Phase 1: Foundations (Days 1–10)  
- ✅ **Day 1**: Linux Files & Permissions  
- ✅ **Day 2**: Shell Text Processing (grep/awk/sed)  
- ✅ **Day 3**: Git Advanced Branching  
- ✅ **Day 4**: Python CLI with Click  
- ✅ **Day 5**: Python + Boto3 S3 Tool  
- ✅ **Day 6**: Shell Script: Backup & Rotate Logs  
- ✅ **Day 7**: Git Hooks (pre-commit, pre-push)  
- ✅ **Day 8**: Python Unit Testing with Pytest  
- ✅ **Day 9**: Makefiles for DevOps Automation  
- ✅ **Day 10**: Regex for Log Parsing

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### 🔹 Phase 2: Terraform & AWS (Days 11–30)  
🌐 Build strong **Infrastructure-as-Code** foundations with Terraform and AWS.

- **Day 11**: Terraform Remote State  
- **Day 12**: IAM Users & Policies  
- **Day 13**: S3 Bucket + Versioning & Lifecycle  
- **Day 14**: VPC, Subnets, IGW, NAT  
- **Day 15**: Route Tables & Endpoints  
- **Day 16**: Security Groups & NACLs  
- **Day 17**: EC2 + User Data + SSM  
- **Day 18**: ALB with Terraform  
- **Day 19**: Auto Scaling Groups  
- **Day 20**: CloudWatch Alarms  
- **Day 21**: RDS with Terraform  
- **Day 22**: ElastiCache (Redis)  
- **Day 23**: SSM Parameters & Secrets  
- **Day 24**: ECR Repositories  
- **Day 25**: CloudFront Static Site  
- **Day 26**: Route53 DNS Records  
- **Day 27**: AWS Backup Plans  
- **Day 28**: Budgets & Cost Alerts  
- **Day 29**: AWS Config Rules  
- **Day 30**: AWS Organizations & SCPs

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### 🔹 Phase 3: CI/CD with Jenkins (Days 31–45)  
⚡ Build reliable pipelines with Jenkins, Terraform, Docker, and Helm.

- **Day 31**: Jenkins Docker Agent  
- **Day 32**: Declarative Pipelines  
- **Day 33**: Multibranch Pipelines  
- **Day 34**: Shared Libraries  
- **Day 35**: Terraform Pipeline  
- **Day 36**: Docker Build + Push to ECR  
- **Day 37**: Helm Deploy to EKS  
- **Day 38**: Approval Gates  
- **Day 39**: Parallel Stages  
- **Day 40**: Artifact Archiving  
- **Day 41**: Secrets & Credentials Binding  
- **Day 42**: Quality Gates (tfsec, checkov)  
- **Day 43**: Nightly Synthetic Tests  
- **Day 44**: Webhook Triggers  
- **Day 45**: Backup & Restore Jenkins

---

### 🔹 Phase 4: Containers & Kubernetes (Days 46–60)  
🐳 Containerization + Kubernetes at scale.

- **Day 46**: Docker Multi-stage Builds & Security  
- **Day 47**: Docker Compose for Local Dev  
- **Day 48**: EKS Cluster with Terraform  
- **Day 49**: EKS Managed Nodegroups  
- **Day 50**: K8s Deployment & Service  
- **Day 51**: ConfigMaps & Secrets  
- **Day 52**: Ingress + ALB Controller  
- **Day 53**: Horizontal Pod Autoscaler  
- **Day 54**: Helm Chart for API Service  
- **Day 55**: Helm Chart for Worker Service  
- **Day 56**: Kustomize Overlays  
- **Day 57**: Fluent Bit + CloudWatch Logs  
- **Day 58**: Prometheus Stack  
- **Day 59**: Grafana Dashboards  
- **Day 60**: OpenTelemetry Collector

---

### 🔹 Phase 5: Security & Policy (Days 61–70)  
🛡️ DevSecOps principles to secure your cloud workloads.

- **Day 61**: tfsec + checkov Integration  
- **Day 62**: OPA/Conftest Policies  
- **Day 63**: Gitleaks & Pre-commit Hooks  
- **Day 64**: IAM Least Privilege  
- **Day 65**: KMS Keys & Encryption  
- **Day 66**: GuardDuty & Security Hub  
- **Day 67**: AWS SSO/SAML Notes  
- **Day 68**: Network ACL Best Practices  
- **Day 69**: AWS WAF WebACL  
- **Day 70**: AWS Shield Advanced Notes

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### 🔹 Phase 6: Serverless & Eventing (Days 71–80)  
⚙️ Serverless compute and event-driven patterns.

- **Day 71**: Lambda with Python (Terraform)  
- **Day 72**: API Gateway HTTP API Integration  
- **Day 73**: EventBridge Scheduled Events  
- **Day 74**: Step Functions Flow  
- **Day 75**: SQS + Dead Letter Queue  
- **Day 76**: SNS Notifications  
- **Day 77**: S3 Event Triggers  
- **Day 78**: Glue & Athena Basics  
- **Day 79**: Kinesis Firehose to S3  
- **Day 80**: CloudTrail Org Trail

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### 🔹 Phase 7: Advanced Ops & Capstone (Days 81–90)  
🏁 Wrapping it all up with advanced ops and a capstone project.

- **Day 81**: Blue/Green Deployment with Helm  
- **Day 82**: Argo Rollouts Canary Deployment  
- **Day 83**: Cost Explorer Scripts with Boto3  
- **Day 84**: Compute Optimizer Review  
- **Day 85**: Chaos Engineering (Pod Delete)  
- **Day 86**: Locust Load Testing  
- **Day 87**: Performance Profiling (py-spy)  
- **Day 88**: SLOs, SLIs, Error Budgets  
- **Day 89**: On-call Runbook Templates  
- **Day 90**: Final Capstone Project (Infra + App + CI/CD)

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## 🏆 Outcome
By the end of this challenge you will:  
- 🚀 Build **CI/CD pipelines** with Jenkins, Terraform & Helm  
- ☁️ Deploy full AWS infra (VPC, RDS, EKS, ALB, S3, Lambda, etc.)  
- 📊 Create observability stack (Prometheus, Grafana, OpenTelemetry)  
- 🔐 Apply **DevSecOps** practices (IAM, tfsec, OPA, WAF)  
- 🎓 Deliver a **capstone project** that proves your DevOps mastery

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✨ Let’s begin this journey together — **Day 1 starts now!**

90daysofdevops

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