Add support for setting storage size on ZFS containers #21946
Add support for setting storage size on zfs containers
Now supports setting a containers storage size when using zfs as the storage engine. By passing in `--storage-opt size=<size>`, the created container's storage size will be limited to the given size. Note that the way zfs works, the given specified storage size will be given in addition to the base container size. Example: The node image reports a size of `671M` from `df -h` when started. Setting `--storage-opt size=2G` will result in a drive the size of `671M` + `2G`, `2.7G` in total. Available space will be `2.0G`. The storage size is achieved by setting the zfs option `quota` to the given size on the zfs volume. Signed-off-by: Ken Herner <firstname.lastname@example.org>
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