And using strace on libvirtd, I see it's running this:
[pid 5806] execve("/sbin/zpool", ["/sbin/zpool", "get", "-Hp",
"health,size,free,allocated", "zfs/images"], 0x7fffedc8b6c8 /* 6 vars
*/) = 0
Which is not a valid command:
root@beaver:~# /sbin/zpool get -Hp health,size,free,allocated zfs/images
cannot open 'zfs/images': invalid character '/' in pool name
Right. It seems that this part of libvirt thinks that it has full reign
over a zfs *pool*, whereas everything else is happy to create child
datasets of an existing *dataset*
Furthermore: when the zpool command fails, libvirt is still happy to zap
all the existing defined libvirt volumes (or it has already done so).
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https://bugs.launchpad.net/bugs/1767997
Title:
virt-manager destroys all volumes in libvirt zfs pool
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