umoci-raw-add-layer - Man Page

umoci raw add-layer --image=image [--tag=tag] [--compress=compression-type] [--no-history] [--history.comment=comment] [--history.created_by=created_by] [--history.author=author] [--history-created=date] new-layer.tar

Adds the uncompressed layer archive referenced by new-layer.tar verbatim to the image. Note that since this is done verbatim, no changes are made to the layer and thus any OCI-specific tar extensions (such as .wh. whiteout files) will be included unmodified. Use of this command is therefore only recommended for expert users, and more novice users should look at umoci-repack(1) to create their layers.

At the moment, umoci raw add-layer only supports appending layers to the end of the image layer list.

The global options are defined in umoci(1).

--image=image[:tag]

 The source tag to use as the base of the image containing the new layer.
 image must be a path to a valid OCI image and tag must be a valid tag in
 the image. If tag is not provided it defaults to "latest".

--tag=tag

The destination tag to use for the newly created image. tag must be a valid
 tag in the image. If tag is not provided it defaults to the tag specified
 in --image (overwriting it).

--compress=compression-type

Specify the compression type to use when creating a new layer. Supported
 compression types are none, gzip, and zstd. umoci-unpack(1)
 transparently supports all compression methods you can specify with
 --compress.
 
 The special value auto will cause umoci(1) to auto-select the most
 appropriate compression algorithm based on what previous layers are
 compressed with (it will try to use the most recent layer's compression
 algorithm which it supports). Note that auto will never select none
 compression automatically, as not compressing tar(1) archives is really
 not advisable.
 
 If no compression-type is provided, it defaults to auto.

--no-history

 Causes no history entry to be added for this operation. This is not
 recommended for use with umoci-raw-add-layer(1), since it results in the
 history not including all of the image layers -- and thus will cause
 confusion with tools that look at image history.

--history.comment=comment

Comment for the history entry corresponding to this modification of the image
 If unspecified, umoci(1) will generate an implementation-dependent value.

--history.created_by=created_by

CreatedBy entry for the history entry corresponding to this modification of
 the image. If unspecified, umoci(1) will generate an
 implementation-dependent value.

--history.author=author

Author value for the history entry corresponding to this modification of the
 image. If unspecified, this value will be the image's author value after
 any modifications were made by this call of umoci-config(1).

--history-created=date

Creation date for the history entry corresponding to this modifications of
 the image. This must be an ISO8601 formatted timestamp (see date(1)). If
 unspecified, the current time is used.

The following takes an existing diff directory, creates a new archive from it and then inserts it into an existing image. Note that the new archive is not compressed (umoci will compress the archive for you).

% tar cfC diff-layer.tar diff/ .
% umoci raw add-layer --image oci:foo diff-layer.tar

umoci(1), umoci-repack(1)

umoci-insert(1), umoci-raw(1).