On 17 August 2016 at 20:26, 郑圆杰 <[email protected]> wrote:
> We run docker image on lx zone, and captured an snapshot as zfs snapshot
> stream.
> Is there a way to export the dataset as tar?
We have a program that you can point at a ZFS snapshot and create a
tar file. We include this in "cn-agent", the component that creates
Docker layers as part of "docker build" or "docker commit" in Triton.
https://github.com/joyent/zfs_snapshot_tar
You'll need to compile it first. You can use it to create a tar file
from an entire snapshot, or an incremental tar file that just includes
the changes between one snapshot and another. The help message should
hopefully be relatively self-explanatory:
zfs_snapshot_tar: This program requires 2 or 3 positional arguments.
Usage:
zfs_snapshot_tar [OPTIONS] <dataset> [<parent_snapshot>] <snapshot>
zfs_snapshot_tar [OPTIONS] -e <parentdataset@snapshot> <dataset@snapshot>
-h This help message.
-e Use explicit "dataset@snapshot" arguments.
-t Print details about the archive that would be
created without creating the archive itself.
-f FILE Output tarball name. Without -f, output is to
stdout.
-r SUBDIR Subdirectory within dataset to consider as the
root directory for the tarball
-x PATH Exclude a file or directory (and subdirectories)
from the archive. Takes effect after -r, if that
option is used.
Cheers.
--
Joshua M. Clulow
UNIX Admin/Developer
http://blog.sysmgr.org
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