Do I need Kubernetes to run stateful services?

No — you do not need Kubernetes to run stateful services.

You can run stateful services without Kubernetes using:

• Virtual machines
• Bare metal servers
• Docker Compose
• Systemd / init scripts
• Managed cloud services like RDS, Cloud SQL, or managed Redis

Kubernetes can help with stateful services, but it’s not required

Kubernetes has features like:

• persistent volumes
• storage classes
• StatefulSets
• service discovery
• automated restarts and scheduling

These can make operating things like databases or queues easier in some environments, but they also add complexity.

Good reasons to use Kubernetes for stateful workloads

• you already run other workloads on Kubernetes
• you need consistent deployment and scaling patterns
• you want self-healing and automated scheduling
• you’re comfortable managing persistent storage carefully

Good reasons not to use it

• your stateful service is simple and stable
• you want lower operational complexity
• you need strong storage performance or simple recovery
• a managed service is available and cheaper to operate

Rule of thumb

For databases and core storage systems, Kubernetes is often not the first choice unless you have a strong reason. Managed services or traditional infrastructure are often simpler and safer.

If you want, I can also help you decide whether Kubernetes makes sense for a specific service like Postgres, Redis, Kafka, or Elasticsearch.