Kubernetes for Docker Users

Short summary

Kubernetes automates containerized app deployment, scaling, and management using a control plane and worker nodes. Core concepts include pods, deployments, services, and namespaces—all managed via kubectl commands. Critical gotchas: set resource requests/limits to prevent node starvation, configure proper memory thresholds for pod eviction, and use shared Ingress controllers instead of LoadBalancers to avoid expensive multi-ELB costs.

• •Kubernetes automates container orchestration with control plane managing cluster state and worker nodes running containers
• •Core concepts: pods (smallest unit), deployments (manage replicas), services (stable endpoints), ConfigMaps/Secrets (config injection), namespaces (logical partitions)
• •Common pitfalls: unbounded CPU/memory consuming node resources, improper memory limits causing pod eviction, multiple LoadBalancers generating wasteful AWS costs

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