Kubernetes Workload Objects

StatefulSet

StatefulSet maintains a sticky identity for each of their Pods. These pods are created from the same spec but are not interchangeable: each has a persistent identifier that it maintains across any rescheduling.

Valuable for applications that require:

• Stable, unique network identifiers.
• Stable, persistent storage.
• Ordered, graceful deployment and scaling.
• Ordered, automated rolling updates.

[!NOTE] If an application doesn't require any stable identifiers or ordered deployment, deletion, or scaling, you should deploy your application using a workload object that provides a set of stateless replicas (e.g., Deployment or ReplicaSet).

CronJob & Issues

• CronJob Issue - Job is not cleaned up
• Kubernetes Issue 42649 - CronJob controller performance