Provided by: nbdkit-plugin-perl_1.16.2-1ubuntu3_amd64
nbdkit-tar-plugin - read and write files inside tar files without unpacking
nbdkit tar tar=FILENAME.tar file=PATH_INSIDE_TAR
Serve a single file inside a tarball nbdkit tar tar=file.tar file=some/disk.img guestfish --format=raw -a nbd://localhost Opening a disk image inside an OVA file The popular "Open Virtual Appliance" (OVA) format is really an uncompressed tar file containing (usually) VMDK-format files, so you could access one file in an OVA like this: $ tar tf rhel.ova rhel.ovf rhel-disk1.vmdk rhel.mf $ nbdkit -r tar tar=rhel.ova file=rhel-disk1.vmdk $ guestfish --ro --format=vmdk -a nbd://localhost
"nbdkit-tar-plugin" is a plugin which can read and writes files inside an uncompressed tar file without unpacking the tar file. The "tar" and "file" parameters are required, specifying the name of the uncompressed tar file and the exact path of the file within the tar file to access as a disk image. This plugin will not work on compressed tar files. Use the nbdkit -r flag to open the file readonly. This is the safest option because it guarantees that the tar file will not be modified. Without -r writes will modify the tar file. Also writing to the tar file does not change data checksums stored in other files (the "rhel.mf" file in the example above), and as these will become incorrect you probably won't be able to open the file with another tool afterwards. The disk image cannot be resized.
"nbdkit-tar-plugin" first appeared in nbdkit 1.2.
https://github.com/libguestfs/nbdkit/blob/master/plugins/tar/tar.pl, nbdkit(1), nbdkit-plugin(3), nbdkit-perl-plugin(3).
Richard W.M. Jones. Based on the virt-v2v OVA importer written by Tomáš Golembiovský.
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