What is the difference between Docker Containerization and Kubernetes Container Orchestration?
Quick Revision Summary
Docker packages applications into standardized containers; Kubernetes coordinates, scales, and self-heals hundreds of containers across distributed server clusters.
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Model Answer & Deep-Dive Explanation
Docker is a platform and runtime for creating, packaging, and running applications inside isolated lightweight containers that share the host OS ke el.
Kube etes (K8s) is an open-source container orchestration platform that automates deployment, scaling, healing, and management of containerized applications across a cluster of multiple host machines.
| Dimension | Docker (Standalone) | Kube etes |
|---|---|---|
| Scope | Single container lifecycle on one host | Fleet orchestration across multiple nodes |
| Auto-scaling | Manual or basic scripts | Horizontal Pod Autoscaler (HPA) based on CPU/RAM/metrics |
| Self-healing | Restarts failed container locally | Replaces dead nodes, reschedules pods across healthy nodes |
| Networking | Bridge, Host, Overlay drivers | Cluster-wide CNI, Ingress Controllers, Service mesh |
Interviewer Evaluation Points & Scoring Rubric
- 1 1. Clearly articulates container runtime vs orchestration platform. 2. Mentions self-healing, rolling deployments, and auto-scaling. 3. Shows understanding of K8s primitives (Pods, Deployments, Services).
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