knife-client (1)

The man page for the knife client subcommand. when a node runs the chef-client for the first time, it generally does not yet have an api client identity, and so it cannot make authenticated requests to the server. this is where the validation client---known as the chef-validator---comes in. when the chef-client runs, it checks if it has a client key. if the client key does not exist, it then attempts to borrow the identity of the chef-validator to register itself with the server. in order to register with the server, the private key for the chef-validator needs to be copied to the host and placed in /etc/chef/validation.pem. once the chef-client has registered itself with the server, it no longer uses the validation client for anything. it is recommended that you delete the private key for the chef-validator from the host after the host has registered or use the delete_validation recipe that can be found in the chef-client cookbook (https://github.com/opscode-cookbooks/chef-client). the knife client subcommand is used to manage an api client list and their associated rsa public key-pairs. this allows authentication requests to be made to the server by any entity that uses the chef server api, such as the chef-client and knife.

COMMON OPTIONS

The following options may be used with any of the arguments available to the knife client subcommand:

--chef-zero-port PORT: The port on which chef-zero will listen.
-c CONFIG_FILE, --config CONFIG_FILE: The configuration file to use.
-d, --disable-editing: Indicates that $EDITOR will not be opened; data will be accepted as-is.
--defaults: Indicates that Knife will 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 server.
--[no-]color: Indicates whether colored output will be used.
--print-after: Indicates that data will be shown after a destructive operation.
-s URL, --server-url URL: The URL for the server.
-u USER, --user USER: The user name used by Knife to sign requests made by the API client to the server. Authentication will fail if the user name does not match the private key.
-V, --verbose: Set for more verbose outputs. Use -VV for maximum verbosity.
-v, --version: The version of the chef-client.
-y, --yes: Indicates that the response to all confirmation prompts will be "Yes" (and that Knife will not ask for confirmation).
-z, --local-mode: Indicates that the chef-client will be run in local mode, which allows all commands that work against the server to also work against the local chef-repo.

BULK DELETE

The bulk delete argument is used to delete any API client that matches a pattern defined by a regular expression. The regular expression must be within quotes and not be surrounded by forward slashes (/).

Syntax

This argument has the following syntax:

$ knife client bulk delete REGEX

Options

This command does not have any specific options.

CREATE

The create argument is used to create a new API client. This process will generate an RSA key pair for the named API client. The public key will be stored on the server and the private key will be displayed on STDOUT or written to a named file.

For the chef-client, the private key should be copied to the system as /etc/chef/client.pem.
For Knife, the private key is typically copied to ~/.chef/client_name.pem and referenced in the knife.rb configuration file.
Syntax
This argument has the following syntax:
```
$ knife client create CLIENT_NAME (options)
```
Options
This argument has the following options:

-a, --admin

Indicates that a client will be created as an admin client. This is required when users of the open source server need to access the Chef Server API as an administrator. This option only works when used with the open source server and will have no effect when used with Enterprise Chef.

Examples

To create a Chef Admin client with the name "exampleorg" and save its private key to a file, enter:

$ knife client create exampleorg -a -f "/etc/chef/client.pem"

When running the create argument on Enterprise Chef, be sure to omit the -a option:

$ knife client create exampleorg -f "/etc/chef/client.pem"

DELETE

The delete argument is used to delete a registered API client.

Syntax

This argument has the following syntax:

$ knife client delete CLIENT_NAME

Options

This command does not have any specific options.

Examples

To delete a client with the name "client_foo", enter:

$ knife client delete client_foo

Type Y to confirm a deletion.

EDIT

The edit argument is used to edit the details of a registered API client. When this argument is run, Knife will open $EDITOR to enable editing of the admin attribute. (None of the other attributes should be changed using this argument.) When finished, Knife will update the server with those changes.

Syntax

This argument has the following syntax:

$ knife client edit CLIENT_NAME

Options

This command does not have any specific options.

Examples

To edit a client with the name "exampleorg", enter:

$ knife client edit exampleorg

LIST

The list argument is used to view a list of registered API client.

Syntax

This argument has the following syntax:

$ knife client list (options)

Options

This argument has the following options:

-w, --with-uri

Indicates that the corresponding URIs will be shown.

Examples

To verify the API client list for the server, enter:

$ knife client list

to return something similar to:

exampleorg
i-12345678
rs-123456

To verify that an API client can authenticate to the server correctly, try getting a list of clients using -u and -k options to specify its name and private key:

$ knife client list -u ORGNAME -k .chef/ORGNAME.pem

REREGISTER

The reregister argument is used to regenerate an RSA key pair for an API client. The public key will be stored on the server and the private key will be displayed on STDOUT or written to a named file.

Note: Running this argument will invalidate the previous RSA key pair, making it unusable during authentication to the server.

Syntax

This argument has the following syntax:

$ knife client reregister CLIENT_NAME (options)

Options

This argument has the following options:

-f FILE_NAME, --file FILE_NAME

Indicates that the private key will be saved to a specified file name.

Examples

To regenerate the RSA key pair for a client named "testclient" and save it to a file named "rsa_key", enter:

$ knife client regenerate testclient -f rsa_key

SHOW

The show argument is used to show the details of an API client.

Syntax

This argument has the following syntax:

$ knife client show CLIENT_NAME (options)

Options

This argument has the following options:

-a ATTR, --attribute ATTR

The attribute (or attributes) to show.

Examples

To view a client named "testclient", enter:

$ knife client show testclient

to return something like:

admin:       false
chef_type:   client
json_class:  Chef::ApiClient
name:        testclient
public_key:

To view information in JSON format, use the -F common option as part of the command like this:

$ knife role show devops -F json

Other formats available include text, yaml, and pp.

AUTHOR

Chef