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We currently have one foot in Docker swarm (and single node compose), and considering k8s. One thing I'm uncertain of, is the state of shared storage/volumes in swarm - none of the options seem well supported or stable. I'm leaning towards trying nfs based volumes, but it feels like it might be fragile.

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Sure. Our solution so far has been both simple and pragmatic - the main DB's do not live inside containers. It's a bit of manual ops, but it works for us. All the 'media' in the stacks I am dealing with is minor enough to serve over a custom API e.g. no massive image/audio/etc datasets where files need to be first class citizens.

We generally avoid mounting volumes at all costs. The challenge of mapping host uid:gid to container uid:gid (and keeping that mapping from breaking) proved painful and not worth the effort

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