Kubernetes vs Docker Compose: When to Use Which
Docker Compose is not a stepping stone to Kubernetes — they solve different problems. Understanding when each is appropriate saves months of unnecessary complexity.
I get this question on almost every scoping call. The short answer: use Docker Compose for development and single-server deployments, use Kubernetes when you need multi-node scaling, self-healing, or zero-downtime deploys in production.
When Docker Compose is enough
If your application runs on a single server, handles moderate traffic, and a 5-minute deploy window is acceptable — Docker Compose with a reverse proxy (Nginx or Traefik) is often the right choice. Simpler, faster to iterate, easier to debug.
When Kubernetes makes sense
Zero-downtime rolling deployments, automatic pod rescheduling on node failure, horizontal scaling based on CPU or custom metrics, and multi-tenant workload isolation — these are genuine Kubernetes use cases. If you need any of these, the operational overhead is justified.
The middle ground: k3s
For teams that want Kubernetes features without the full overhead, k3s on 2-3 small VMs is a practical choice. I have migrated several e-commerce platforms to this setup — Kubernetes-compatible API, 512MB RAM footprint per node, and easy to manage.