দারুণ 👍
তুমি যেহেতু ইতিমধ্যেই VPS, CyberPanel, manual deployment, PHP/Python/Node.js, GitHub Actions দিয়ে CI/CD পারো—তুমি beginner না, বরং mid → senior DevOps path এ আছো।
আমি তোমাকে Industry-ready Complete DevOps Syllabus (0 → Professional DevOps Engineer) দিচ্ছি।

আমি এটাকে Phase-wise Roadmap আকারে দিলাম, যাতে তুমি বুঝতে পারো কি শিখবে, কেন শিখবে, আর বাস্তবে কোথায় ব্যবহার হবে।

🔥 COMPLETE DEVOPS SYLLABUS (PRO LEVEL)

🟢 PHASE 1: Core Foundations (Already known but must be solid)

1️⃣ Linux (ADVANCED LEVEL)

Linux filesystem internals
Systemd (services, timers)
Process management (nice, top, htop)
Disk management (LVM, mount, fstab)
Network tools (ss, ip, netstat, tcpdump)
Log analysis (journalctl, /var/log)
User, permission, ACL, sudo policy

👉 Goal: Production server debug করতে পারা

2️⃣ Networking for DevOps (VERY IMPORTANT)

TCP/IP deep dive
DNS (A, AAAA, CNAME, MX, TXT)
HTTP vs HTTPS
TLS/SSL handshake
Reverse Proxy (Nginx)
Load Balancer concepts
Firewall (iptables, ufw)

👉 Real use: Cloudflare, SSL issue, downtime debug

🟢 PHASE 2: Git & CI/CD (Advanced)

3️⃣ Git (Professional Usage)

Git internals (objects, refs)
Rebase vs Merge
Git hooks
Monorepo vs Multirepo
GitFlow, Trunk Based Dev

4️⃣ CI/CD (You already know basics)

GitHub Actions (Advanced)
- Matrix builds
- Self-hosted runners
- Secrets management
- Reusable workflows
GitLab CI
Jenkins (Pipeline as Code)
Blue-Green & Canary deployment
Rollback strategy

👉 Target: Zero-downtime deployment

🟢 PHASE 3: Containers & Orchestration (CORE DEVOPS)

5️⃣ Docker (ADVANCED)

Dockerfile best practices
Multi-stage build
Docker networking
Docker volumes
Security scanning (Trivy)
Docker Compose (production use)

6️⃣ Kubernetes (MUST HAVE)

Kubernetes architecture
Pod, Deployment, ReplicaSet
Service (ClusterIP, NodePort, LoadBalancer)
Ingress Controller (NGINX)
ConfigMap, Secret
Persistent Volume / PVC
Horizontal Pod Autoscaler
Helm charts
Kustomize
Kubernetes security (RBAC, PSP)

👉 Real skill: Microservice production deploy

🟢 PHASE 4: Cloud Platforms (Choose at least ONE deeply)

7️⃣ AWS (Recommended)

EC2, AMI
VPC, Subnet, NAT
IAM (critical)
ALB / NLB
S3
RDS
ECR, ECS
EKS (Kubernetes)
CloudWatch

👉 Alternative:

GCP (GKE)
Azure (AKS)

🟢 PHASE 5: Infrastructure as Code (IaC)

8️⃣ Terraform (VERY IMPORTANT)

Terraform basics
Providers
Modules
State management
Remote backend
Terraform + AWS
Terraform + Kubernetes

👉 Goal: 1 command = full infrastructure

9️⃣ Configuration Management

Ansible
- Playbooks
- Roles
- Inventory
Secrets with Ansible Vault

🟢 PHASE 6: Monitoring, Logging & Security

🔟 Monitoring

Prometheus
Grafana
Node Exporter
Alertmanager
Uptime monitoring

1️⃣1️⃣ Logging

ELK Stack (Elasticsearch, Logstash, Kibana)
Loki + Promtail
Centralized logging

1️⃣2️⃣ Security & DevSecOps

OWASP Top 10
CI security scanning
Secret scanning
SSL hardening
Fail2Ban
WAF (Cloudflare / AWS WAF)

🟢 PHASE 7: Advanced DevOps (PRO LEVEL)

1️⃣3️⃣ Architecture

Monolith → Microservice
Event-driven architecture
High availability system design
Disaster recovery

1️⃣4️⃣ Performance & Cost

Load testing (k6)
Autoscaling
Cost optimization (FinOps)

🟢 PHASE 8: Real-World Projects (MOST IMPORTANT)

🔥 Must-Do Projects

Full CI/CD pipeline
👉 GitHub → Docker → Kubernetes → AWS EKS
Blue-Green deployment project
Monitoring + Alerting setup
Terraform project (Full infra)
Secure production setup (WAF + SSL + Backup)

🟢 BONUS (Job Ready)

Resume for DevOps Engineer
DevOps interview questions
System design interview
Freelancing / Remote job preparation

🔥 Suggested Learning Order (90 Days Plan)

Day 1–15: Linux + Networking
Day 16–30: Docker + CI/CD
Day 31–60: Kubernetes + AWS
Day 61–75: Terraform + Monitoring
Day 76–90: Real Projects + Interview

🧠 Next Step

তুমি চাইলে আমি:
1️⃣ এই syllabus অনুযায়ী daily study plan
2️⃣ Real project based roadmap
3️⃣ DevOps interview Q&A
4️⃣ AWS + Kubernetes deep dive
5️⃣ DevOps roadmap PDF বানিয়ে দিতে পারি

👉 বলো, পরের step কোনটা চাই?

DEVOPS