github.com/nf/docker@v1.8.1/docs/reference/commandline/import.md (about)

     1  <!--[metadata]>
     2  +++
     3  title = "import"
     4  description = "The import command description and usage"
     5  keywords = ["import, file, system, container"]
     6  [menu.main]
     7  parent = "smn_cli"
     8  weight=1
     9  +++
    10  <![end-metadata]-->
    11  
    12  # import
    13  
    14      Usage: docker import URL|- [REPOSITORY[:TAG]]
    15  
    16      Create an empty filesystem image and import the contents of the
    17  	tarball (.tar, .tar.gz, .tgz, .bzip, .tar.xz, .txz) into it, then
    18  	optionally tag it.
    19  
    20        -c, --change=[]     Apply specified Dockerfile instructions while importing the image
    21  
    22  URLs must start with `http` and point to a single file archive (.tar,
    23  .tar.gz, .tgz, .bzip, .tar.xz, or .txz) containing a root filesystem. If
    24  you would like to import from a local directory or archive, you can use
    25  the `-` parameter to take the data from `STDIN`.
    26  
    27  The `--change` option will apply `Dockerfile` instructions to the image
    28  that is created.
    29  Supported `Dockerfile` instructions:
    30  `CMD`|`ENTRYPOINT`|`ENV`|`EXPOSE`|`ONBUILD`|`USER`|`VOLUME`|`WORKDIR`
    31  
    32  ## Examples
    33  
    34  **Import from a remote location:**
    35  
    36  This will create a new untagged image.
    37  
    38      $ docker import http://example.com/exampleimage.tgz
    39  
    40  **Import from a local file:**
    41  
    42  Import to docker via pipe and `STDIN`.
    43  
    44      $ cat exampleimage.tgz | docker import - exampleimagelocal:new
    45  
    46  **Import from a local directory:**
    47  
    48      $ sudo tar -c . | docker import - exampleimagedir
    49  
    50  **Import from a local directory with new configurations:**
    51  
    52      $ sudo tar -c . | docker import --change "ENV DEBUG true" - exampleimagedir
    53  
    54  Note the `sudo` in this example – you must preserve
    55  the ownership of the files (especially root ownership) during the
    56  archiving with tar. If you are not root (or the sudo command) when you
    57  tar, then the ownerships might not get preserved.
    58