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Kubernetes provides several workload controllers for running containers in a GKE cluster. Each controller is designed for a specific type of application. Understanding when to use each one is fundamental to building reliable applications on GKE.
A Deployment is the most common workload controller. It manages a set of identical, stateless pods and handles rolling updates, rollbacks, and scaling. Deployments are the right choice for stateless applications such as web servers, APIs, and microservices.
| Feature | Description |
|---|---|
| Rolling updates | New pods are gradually created while old pods are terminated |
| Rollback | Revert to any previous revision |
| Scaling | Scale up or down by changing the replica count |
| Self-healing | Failed pods are automatically replaced |
| ReplicaSet | A Deployment manages a ReplicaSet, which manages pods |
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