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Lessons (7)

• EC2, Storage and Auto Scaling

  … Stopping an EBS-backed instance preserves attached EBS data but storage can continue to incur charges. Termination may …

• Cost Optimization and the Well-Architected Framework

  … unused EC2, unattached EBS volumes, old snapshots, idle load balancers, dev environments running overnight. 2. NAT gateway data …

• Internals, Upgrades, Resilience and Interview Questions

  … kube-proxy (or eBPF) rules send traffic to ready pod IPs in the EndpointSlices that match the Service …

• Resilience, Disaster Recovery and Multi-Region Design

  … Cross-region read replica or automated backup replication EBS / EC2 Snapshots copied cross-region; AWS Elastic Disaster Recovery …

• Cluster Networking, DNS and NetworkPolicies

  … Cilium can replace kube-proxy using eBPF. mermaid flowchart LR C[Client pod] -- my-svc:80 V[ClusterIP …

• Multi-Account Strategy, Governance and Security Operations

  … isolate instance, disable key] Preventive controls checklist - Block public S3 access at the account level. - Enforce encryption (EBS …

• Containers at Scale: ECS Deep Dive and EKS

  … Plan for the support window of each version. - Manage add-ons (CoreDNS, kube-proxy, VPC CNI, EBS CSI …