github.com/marksheahan/packer@v0.10.2-0.20160613200515-1acb2d6645a0/website/source/docs/builders/null.html.md (about)

     1  ---
     2  description: |
     3      The `null` Packer builder is not really a builder, it just sets up an SSH
     4      connection and runs the provisioners. It can be used to debug provisioners
     5      without incurring high wait times. It does not create any kind of image or
     6      artifact.
     7  layout: docs
     8  page_title: Null Builder
     9  ...
    10  
    11  # Null Builder
    12  
    13  Type: `null`
    14  
    15  The `null` Packer builder is not really a builder, it just sets up an SSH
    16  connection and runs the provisioners. It can be used to debug provisioners
    17  without incurring high wait times. It does not create any kind of image or
    18  artifact.
    19  
    20  ## Basic Example
    21  
    22  Below is a fully functioning example. It doesn't do anything useful, since no
    23  provisioners are defined, but it will connect to the specified host via ssh.
    24  
    25  ``` {.javascript}
    26  {
    27    "type":         "null",
    28    "ssh_host":     "127.0.0.1",
    29    "ssh_username": "foo",
    30    "ssh_password": "bar"
    31  }
    32  ```
    33  
    34  ## Configuration Reference
    35  
    36  The null builder has no configuration parameters other than the
    37  [communicator](/docs/templates/communicator.html) settings.