I’m sure you’ve thought about how to update SQL Server containers running on a Kubernetes cluster at some point. So, this blog attempts to answer the question. According to the Kubernetes documentation, there are two Update strategies for statefulset workloads. For your convenience, I’m quoting the summary below:
OnDelete update : When a StatefulSet’s .spec.updateStrategy.type is set to OnDelete, the StatefulSet controller will not automatically update the Pods in a StatefulSet. Users must manually delete Pods to cause the controller to create new Pods that reflect modifications made to a StatefulSet’s .spec.template. Rolling update : When a statefuleset’s .spec.updateStrategy.type