A Kubernetes Deployment manages a replicated stateless application on Kubernetes.
It describes the desired state for a set of Pods and lets Kubernetes roll changes out over time.
Deployments usually create and manage ReplicaSets, which then manage Pods.
Why use it
Deployments are useful when you want:
- Multiple replicas of the same application
- Rolling updates
- Rollbacks
- Self-healing when Pods fail
- Declarative application configuration
Good fit
Deployments are a good fit for stateless services where any Pod replica can handle any request.
For stateful systems, a Kubernetes StatefulSet is often a better fit.