About Knife Opc Subcommand

Config.rb Configuration 

The knife-opc plugin's subcommands, in contrast to other knife subcommands, make API calls to the root endpoint of your Chef Infra Server installation. 

Typical chef_server_url for your chef infra Server looks like this:

chef_server_url 'https://chef.yourdomain.com/organizations/ORG_NAME'

Set the chef server root parameter to the root of your Chef Infra Server installation to setup knife-opc:

chef_server_root 'https://chef.yourdomain.com/'

This parameter defaults to https://chef.yourdomain.com/ if your chef_server_url configuration ends with /organizations/ORG NAME (as demonstrated above).

Standard Knife Opc Subcommands 

Opc user List (plugin_knife_opc-opc-user-list)

List every user who has access to your Chef Infra Server installation.

Syntax 

The syntax is given below: 

Knife opc user List

Options 

This has the options given below: 

To show corresponding URL’s  

-w, –with-uri 

Examples 

knife opc user list
Ninja1 
Ninja2 
knife opc user list -w
Ninja1: https://chef-server.fqdn/users/ninja1
Ninja2: https://chef-server.fqdn/users/ninja2

Opc user show(plugin_knife_opc-opc-user-list)

It reveals a user's specifics in your Chef Infra Server installation.

Syntax 

The syntax is given below: 

knife opc user show USER_NAME

Options 

This has the options given below: 

Display the associations that the user is a part of.

-l, –with-uri 

Examples 

knife opc user show Ninja -l
display_name: Coding Ninja
email: Ninja@chef.io
first_name: Coding
last_name: Ninja
middle_name:
organizations: code
public_key: -----BEGIN PUBLIC KEY-----
[...]
-----END PUBLIC KEY-----

username: Coding

Opc user Create(plugin_knife_opc-opc-user-create)

It creates a fresh user for your installed Chef Infra Server. The reply will contain the user's private key.

Syntax 

The syntax is given below: 

knife opc user create USER_NAME FIRST_NAME [MIDDLE_NAME] LAST_NAME EMAIL PASSWORD (options)

 

Options 

This has the options given below: 

Instead of writing to STDOUT, write the private key to FILENAME.

-f FILENAME, --filename FILENAME

Examples 

knife opc user create Ninja1 Ninja2 codingNinja@chef.io password
-----BEGIN RSA PRIVATE KEY-----
[...]
-----END RSA PRIVATE KEY-----

Opc user Delete

It removes the specified OPC user.

Syntax 

The syntax is given below: 

knife opc user delete USER_NAME [-d] [-R]

Options 

This has the options given below: 

Don't first disconnect the user.

-d, --no-disassociate-user

Try to remove the user from any org admin groups where they may be a member. if —no-disassociate-user is set, ignored.

-R, --remove-from-admin-groups

Examples 

knife opc user deletes Ninja1
Do you want to delete the user Ninja1? (Y/N) Y
Checking organization memberships...
Deleting user Ninja1.

Opc user Edit

It opens $EDITOR so you can edit a user. The knife will update the specified Chef Infra Server user once editing is complete. 

Syntax 

The syntax is given below: 

knife opc user edit USER_NAME

Options 

There are no options available 

Examples 

EDITOR=ed knife opc user edit Ninja1
63
1%p
{
  "username": "Coding,"
  "email": "Coding@chef.io",
  "display_name": "Coding Ninja",
  "first_name": "Coding",
  "last_name": "Ninja",
  "middle_name": "",
  "public_key": "-----BEGIN PUBLIC KEY-----\n[...]\n-----END PUBLIC KEY-----\n\n"
}
/email/s/chef.io/xyz.com/p
"email": "Coding@xyz.com",


643
Saved Coding.
knife opc user show Coding
display_name: Coding Ninja
email: Coding@xyz.io
first_name: Coding
last_name: Ninja
middle_name:
public_key: -----BEGIN PUBLIC KEY-----
[...]
-----END PUBLIC KEY-----

username: Coding

Opc user Password 

It commands for controlling a user's password and authentication.

Syntax 

The syntax is given below: 

knife opc user password USER_NAME [PASSWORD | --enable_external_auth]

Note: To enable external authentication for this user, the final argument should either be a string to use as a password or —enable_external_auth in place of a password.

Options 

There are no options available 

Examples 

knife opc user password Ninja new password
{"username"=>"Ninja", "email"=>"Ninja@opscode.com", "display_name"=>"Ninja Coding", "first_name"=>"Ninja", "last_name"=>"Coding", "middle_name"=>"", "public_key"=>"-----BEGIN PUBLIC KEY-----\n[...]\n-----END PUBLIC KEY-----\n\n", "password"=>"newpassword", "recovery_authentication_enabled"=>true}
Authentication info updated for Ninja.

Opc org list [plugin_knife_opc-opc-org-list] 

It list all the organizations that are installed on your Chef Infra Server.

Syntax 

The syntax is given below: 

knife opc org list (options)

Options 

This has the options given below: 

To show the corresponding URL  

-w, –with-uri  

Show auto-generated hidden organisations.

-a, --all-orgs

Examples 

knife opc org list -w -a
acme: https://chef-server.fqdn/organizations/acme

Opc org Show[plugin_knife_opc-opc-org-show] 

It displays information about a certain organization in your Chef Infra Server setup.

Syntax 

The syntax is given below: 

knife opc org show ORG_NAME

Options 

There are no options available 

Examples 

knife opc org show CodingNinja
full_name: CodingNinja
guid: cc9f9d0d4f6e7e35272e327e22e7affc
name: CodingNinja

Opc org create [plugin_knife_opc-opc-org-create] 

A new Chef Infra Server organization has been created. The organization's validator client's private key is given back

Syntax 

The syntax is given below: 

knife opc org create ORG_NAME ORG_FULL_NAME (options)

Options 

This has the options given below: 

Instead of writing to STDOUT, write the private key to FILENAME. 

-f FILENAME, --filename FILENAME

Associate USER_NAME with the organization after creation.

-a USER_NAME, --association_user USER_NAME
 

Examples 

knife opc org create Ninja2"The Other Ninja" -a Ninja1
-----BEGIN RSA PRIVATE KEY-----
[...]
-----BEGIN RSA PRIVATE KEY-----

Opc org delete [plugin_knife_opc-opc-org-delete] 

The specified Chef Infra Server organization is deleted. 

Syntax 

The syntax is given below: 

knife opc org delete ORG_NAME

Options 

No options available. 

Examples 

knife opc org delete Ninja2
Do you want to delete the organization Ninja2? (Y/N) Y
full_name: The Other Ninja
guid: 2adec1140cf777a15d82d9099304da71
name: Ninja2

Opc org user add 

It adds a user to a company and demands the existence of the named user and the organization.

Syntax 

The syntax is given below: 

knife opc org user add ORG_NAME USER_NAME

Options 

No options available. 

Examples 

knife opc org user add CodingNinja ninja1

Opc org user Remove

It expels a user from a company and requires the existence of the named user, the named organisation, and that the user is currently connected to the organisation. 

Syntax 

The syntax is given below: 

knife opc org user remove ORG_NAME USER_NAME

Options 

No options available. 

Examples 

knife opc org user remove CodingNinja ninja1

Frequently Asked Questions

What is a Knife in a chef?

A knife is a command-line tool that connects the Chef Infra Server and a local chef-repo.

How do you run a chef's knife command?

knife commands: | by Venkata Chitturi | DevOps Process and Tools | Medium. chef-client — command to run on a node called convergence. Knife environment compares — all -to compare all recipes in the server across all environments. Knife environment show dev — shows environment information.

What are the three main components of a Chef?

Workstations, servers, and nodes are the three main components of Chef.

What do you mean by a client in Chef?

On each node that Chef is responsible for managing, an agent called a chef-client runs locally.

What do you understand about a node in Chef?

A node is a machine or system managed by the Chef server. It can be attached to any network that can send and receive information.

Conclusion

This article has extensively discussed the knife Opc subcommand, its properties, and syntax.

Refer to our guided paths on Coding Ninjas Studio to learn more about DSA, Competitive Programming, JavaScript, System Design, etc. Enrol in our courses and refer to the mock test and problems available; look at the Top 150 Interview Puzzles,  interview experiences, and interview bundle for placement preparations. Read our blogs on aptitude, competitive programming, interview questions, IT certifications, and data structures and algorithms for the best practice. 

Happy Coding.