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30-Day Plan to Crack Senior DevOps Interview Week 1 – Core Systems & Linux Mastery 1. Revise Linux internals: systemd, processes, file descriptors, signals. 2. Practice strace, lsof, netstat, tcpdump, debug 3 real scenarios. 3. Daily: Solve 1 bash scripting challenge. 4. Interview Edge: Most fail here. “Pod is healthy, service is green, users see 502.”, Only those who know syscalls + sockets survive. Week 2 – Kubernetes & Cloud Chaos 1. Re-learn Kubernetes internals: kubelet, controller manager, scheduler, kube-proxy. 2. Practice with KubeSim or minikube chaos: crash DNS, corrupt etcd, simulate node pressure. 3. AWS/GCP: Build multi-region HA VPC. 4. Run a Fault Injection Simulator drill. 5. Interview Edge: Expect: “HPA shows CPU >90%, but no scaling.” You’ll be ready to debug metrics pipeline, not YAML. Week 3 – CI/CD, Infra as Code & Observability 1. CI/CD: Build a pipeline in GitHub Actions + Jenkins. 2. Add rollback + artifact promotion logic. 3. Terraform/Ansible: Create + break infra, recover drift with terraform import & state rm. 4. Observability: Build Prometheus + Grafana dashboards. 5. Trace latency with eBPF or Jaeger. 6. Interview Edge: Be ready for: “Terraform apply failed mid-way” or “Latency doubled with no logs.” Week 4 – Real Prod Simulation & Story Building Run 3 outage simulations: 1. Pod OOMKilled, logs missing. 2. DB replication lag 5s under load. 3. Canary passed, but prod is failing. Write RCA documents using Google/Netflix templates. Practice answering in STAR format (Situation, Task, Action, Result). Mock Interview Drill: Round 1: Linux + Networking. Round 2: Kubernetes + Cloud Chaos. Round 3: Leadership + RCA storytelling. Interview Edge: Senior rounds don’t test YAML. They test if you can stay calm, narrate chaos, and recover with judgment. The Takeaway: In 30 days, you won’t just “learn tools.” You’ll build scars + stories that make interviewers listen. #DevOps #SRE #Cloud #Kubernetes #InfraThrone #ChaosEngineering