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My mid-sized shop uses managed offerings for MySQL and Postgres but we run several stateful workloads, including ElasticSearch and MongoDB, in GKE.

I personally haven't experienced the issues the OP is describing. It might be that StatefulSets and PVCs are more stable now then when OP tried them. Of course using managed/hosted K8s makes a big difference.

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We use managed K8s. And we dropped StatefulSet maybe 4 months ago.

There might have been a way to support our use case better. But this was managed service and we couldn't easily tweak every settings. But also, we didn't want to.

Our goal of using Kubernetes is to make difficult stuff easy. Not to make easy stuff difficult. And in our skillset and capacity moving stateful services outside K8s was easier, cheaper and more reliable.

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