Have unprivileged container request snapshot/other ZFS management.

I have a container running a workload that takes unpredictable amounts of time to finish. I would like to have it be able to notify the host when a job is finished so that it can be snapshotted. I'm wondering if there are any inbuilt tools for managing this. At a glance I have not found any.

I could cobble together a shell script that remotes into the host and requests that, but that has security implications unless I configure a user on the host with a restricted command set. I could also...

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