Reference

knife-xargs(1)

The man page for the knife xargs subcommand. The knife xargs subcommand is used to take patterns from standard input, download as JSON, run a command against the downloaded JSON, and then upload any changes. Syntax This subcommand has the following syntax: Options This subcommand has the following options: Examples The following examples show various ways of listing all nodes on the server, and then using Perl to replace grantmc with gmc: or without quotes and the backslash escaped: or by using the --pattern option:

NAME

knife-xargs - The man page for the knife xargs subcommand.

The knife xargs subcommand is used to take patterns from standard input, download as JSON, run a command against the downloaded JSON, and then upload any changes.

Syntax

This subcommand has the following syntax:

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

Options

This subcommand has the following options:

-0

Use to show a NULL character (\0) instead of white space as the separator. Default: false.

--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.

--concurrency

The number of allowed concurrent connections. Default: 10.

--[no-]diff

Use to show a diff when a file changes. Default: --diff.

--dry-run

Use to prevent changes from being uploaded to the Chef server. Default: false.

--[no-]force

Use to force the upload of files even if they haven't been changed. Default: --no-force.

-I REPLACE_STRING, --replace REPLACE_STRING

Use to define a string that will be used to replace all occurrences of a file name. Default: nil.

-J REPLACE_STRING, --replace-first REPLACE_STRING

Use to define a string that will be used to replace the first occurrence of a file name. Default: nil.

--local

Use to build or execute a command line against a local file. Set to false to build or execute against a remote file. Default: false.

-n MAX_ARGS, --max-args MAX_ARGS

The maximum number of arguments per command line. Default: nil.

-p [PATTERN...], --pattern [PATTERN...]

One (or more) patterns for a command line. If this option is not specified, a list of patterns may be expected on standard input. Default: nil.

--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 value: default.

-s LENGTH, --max-chars LENGTH

The maximum size (in characters) for a command line. Default: nil.

-t

Use to run the print command on the command line. Default: nil.

-c CONFIG_FILE, --config CONFIG_FILE

The configuration file to use.

--chef-zero-port PORT

The port on which chef-zero will listen.

-d, --disable-editing

Use to prevent the $EDITOR from being opened and to accept data as-is.

--defaults

Use to have knife use the default value instead of asking a user to provide one.

-e EDITOR, --editor EDITOR

The $EDITOR that is used for all interactive commands.

-E ENVIRONMENT, --environment ENVIRONMENT

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.

--[no-]color

Use to view colored output.

--print-after

Use to show data after a destructive operation.

--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.

Examples

The following examples show various ways of listing all nodes on the server, and then using Perl to replace grantmc with gmc:

$ knife list 'nodes/*' | knife xargs "perl -i -pe 's/grantmc/gmc'"

or without quotes and the backslash escaped:

$ knife list /nodes/\* | knife xargs "perl -i -pe 's/grantmc/gmc'"

or by using the --pattern option:

$ knife xargs --pattern '/nodes.*' "perl -i -pe 's/grantmc/gmc'"

AUTHOR

Chef

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