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Manual Reference Pages  -  KNIFE-DIFF (1)


knife-diff - The man page for the knife diff subcommand. \$1 \n[an-margin] level \n[rst2man-indent-level] level margin: \n[rst2man-indent\n[rst2man-indent-level]] - \n[rst2man-indent0] \n[rst2man-indent1] \n[rst2man-indent2]

The knife diff subcommand is used to compare the differences between files and directories on the Chef server and in the chef-repo. For example, to compare files on the Chef server prior to an uploading or downloading files using the knife download and knife upload subcommands, or to ensure that certain files in multiple production environments are the same. This subcommand is similar to the git diff command that can be used to diff what is in the chef-repo with what is synced to a git repository.


This subcommand has the following syntax:

$ knife diff [PATTERN...] (options)


This subcommand has the following options:
  The configuration file to use.
--chef-repo-path PATH
  The path to the chef-repo. This setting will override the default path to the chef-repo. Default: same as specified by chef_repo_path in config.rb.
--chef-zero-port PORT
  The port on which chef-zero will listen.
  Use to view colored output.
--cookbook-version VERSION
  The version of a cookbook to be downloaded.
  The number of allowed concurrent connections. Default: 10.
-d, --disable-editing
  Use to prevent the $EDITOR from being opened and to accept data as-is.
  Use to have Knife use the default value instead of asking a user to provide one.
  Use to select only files that have been added (A), deleted (D), modified (M), and/or have had their type changed (T). Any combination of filter characters may be used, including no filter characters. Use * to select all paths if a file matches other criteria in the comparison. Default value: nil.
-e EDITOR, --editor EDITOR
  The $EDITOR that is used for all interactive commands.
  The name of the environment. When this option is added to a command, the command will run only against the named environment.
-F FORMAT, --format FORMAT
  The output format: summary (default), text, json, yaml, and pp.
-h, --help Shows help for the command.
-k KEY, --key KEY
  The private key that Knife will use to sign requests made by the API client to the Chef server.
  Use to show only the names of modified files.
  Use to show only the names of files with a status of Added, Deleted, Modified, or Type Changed.
  Use --no-recurse to disable listing a directory recursively. Default: --recurse.
  Use to show data after a destructive operation.
--repo-mode MODE
  The layout of the local chef-repo. Possible values: static, everything, or hosted_everything. Use static for just roles, environments, cookbooks, and data bags. By default, everything and hosted_everything are dynamically selected depending on the server type. Default: everything / hosted_everything.
-s URL, --server-url URL
  The URL for the Chef server.
-u USER, --user USER
  The user name used by Knife to sign requests made by the API client to the Chef server. Authentication will fail if the user name does not match the private key.
-v, --version
  The version of the chef-client.
-V, --verbose
  Set for more verbose outputs. Use -VV for maximum verbosity.
-y, --yes Use to respond to all confirmation prompts with "Yes". Knife will not ask for confirmation.
-z, --local-mode
  Use to run the chef-client in local mode. This allows all commands that work against the Chef server to also work against the local chef-repo.

knife.rb File Settings

In addition to the default settings in a knife.rb file, there are other subcommand-specific settings that can be added. When a subcommand is run, Knife will use:
1. A value passed via the command-line
2. A value contained in the knife.rb file
3. The default value

A value passed via the command line will override a value in the knife.rb file; a value in a knife.rb file will override a default value.

The following knife diff settings can be added to the knife.rb file:
  Use to add the --chef-repo-path option.
  Use to add the --concurrency option.
  Use to add the --name-only option.
  Use to add the --name-status option.
  Use to add the --recurse option.
  Use to add the --repo-mode option.


To compare the "base.json" role to a "webserver.json" role, enter:

$ knife diff roles/base.json roles/webserver.json

To compare the differences between the local chef-repo and the files that are on the Chef server, enter:

$ knife diff

To diff a node named node-lb and then only return files that have been added, deleted, modified, or changed, enter:

$ knife diff --name-status node-lb

to return something like:





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KNIFE-DIFF (1) Chef 11.14

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