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Configuring ChefDK

[edit on GitHub]

This guide contains common configuration options used when setting up a new ChefDK installation. If you do not have ChefDK installed, see its installation guide before proceeding further.

Configure Ruby Environment

For many users of Chef, the version of Ruby that is included in the Chef development kit should be configured as the default version of Ruby.

Note

These instructions are intended for macOS and Linux users. For instructions on setting up your Ruby environment on Windows, see ChefDK on Windows.

  1. Open a command window and enter the following:

    $ which ruby

    which will return something like /usr/bin/ruby.

  2. To use the Chef development kit version of Ruby as the default Ruby, edit the $PATH and GEM environment variables to include paths to the Chef development kit. For example, on a machine that runs Bash, run:

    echo 'eval "$(chef shell-init bash)"' >> ~/.bash_profile

    where bash and ~/.bash_profile represents the name of the shell.

    If zsh is your preferred shell then run the following:

    echo 'eval "$(chef shell-init zsh)"' >> ~/.zshrc
  3. Run which ruby again. It should return /opt/chefdk/embedded/bin/ruby.

Note

Using the Chef development kit-provided Ruby as your system Ruby is optional. For many users, Ruby is primarily used for authoring Chef cookbooks and recipes. If that's true for you, then using the Chef Development Kit-provided Ruby is recommended.

Add Ruby to $PATH

The Chef Client includes a stable version of Ruby as part of its installer. The path to this version of Ruby must be added to the $PATH environment variable and saved in the configuration file for the command shell (Bash, csh, and so on) that is used on the machine running ChefDK. In a command window, type the following:

echo 'export PATH="/opt/chefdk/embedded/bin:$PATH"' >> ~/.configuration_file && source ~/.configuration_file

where configuration_file is the name of the configuration file for the specific command shell. For example, if Bash were the command shell and the configuration file were named bash_profile, the command would look something like the following:

echo 'export PATH="/opt/chefdk/embedded/bin:$PATH"' >> ~/.bash_profile && source ~/.bash_profile

Warning

On Microsoft Windows, C:/opscode/chefdk/bin must be before C:/opscode/chefdk/embedded/bin in the PATH.

Install Git

An open source distributed version control system called Git must be installed before the chef-repo can be cloned to ChefDK machine from GitHub.

To install Git:

  1. Go to the following URL: https://help.github.com/articles/set-up-git.
  2. Follow the directions, install Git (https://git-scm.com/downloads), and then complete the remaining configuration steps on that page.

Note

It is not necessary to create or fork a repository in order to clone the chef-repo from GitHub.

Create the Chef repository

Use the chef generate repo to create the Chef repository. For example, to create a repository called chef-repo:

chef generate repo chef-repo

Create .chef Directory

The .chef directory is used to store three files:

  • config.rb
  • ORGANIZATION-validator.pem
  • USER.pem

Where ORGANIZATION and USER represent strings that are unique to each organization. These files must be present in the .chef directory in order for ChefDK to be able to connect to a Chef server.

To create the .chef directory:

  1. In a command window, enter the following:

    mkdir -p ~/chef-repo/.chef

    Note that you'll need to replace chef-repo with the name of the repository you created previously.

  2. After the .chef directory has been created, the following folder structure will be present on the local machine:

    chef-repo/
       .chef/        << the hidden directory
       certificates/
       config/
       cookbooks/
       data_bags
       environments/
       roles/
    
  3. Add .chef to the .gitignore file to prevent uploading the contents of the .chef folder to GitHub. For example:

    $ echo '.chef' >> ~/chef-repo/.gitignore

Starter Kit

If you have access to Chef server through Automate or Chef Manage, you can download the starter kit. The starter kit will create the necessary configuration files: the .chef directory, config.rb, ORGANIZATION-validator.pem, and USER.pem. Simply download the starter kit and then move it to the desired location on your ChefDK machine.

Configure the Chef Repository

With WebUI

Use the following steps to manually set up the chef-repo and to use the Chef management console to get the .pem and config.rb files.

Get Config Files

For a ChefDK installation that will interact with the Chef server (including the hosted Chef server), log on and download the following files:

  • config.rb. This configuration file can be downloaded from the Organizations page.
  • ORGANIZATION-validator.pem. This private key can be downloaded from the Organizations page.
  • USER.pem. This private key can be downloaded from the Change Password section of the Account Management page.

Move Config Files

The config.rb, ORGANIZATION-validator.pem, and USER.pem files must be moved to the .chef directory after they are downloaded from the Chef server.

To move files to the .chef directory:

  1. In a command window, enter each of the following:

    cp /path/to/config.rb ~/chef-repo/.chef

    and:

    cp /path/to/ORGANIZATION-validator.pem ~/chef-repo/.chef

    and:

    cp /path/to/USERNAME.pem ~/chef-repo/.chef

    where /path/to/ represents the path to the location in which these three files were placed after they were downloaded.

  2. Verify that the files are in the .chef folder.

Without WebUI

Use the following steps to manually set up the Chef repository: On your Chef server, create the ORGANIZATION-validator.pem and USER.pem files with the chef-server-ctl command line tool. Then, on your workstation create the config.rb file with the knife tool.

Create an Organization

On the Chef server machine create the ORGANIZATION-validator.pem from the command line using chef-server-ctl. Run the following command:

$ chef-server-ctl org-create ORG_NAME ORG_FULL_NAME -f FILE_NAME

where

  • The name must begin with a lower-case letter or digit, may only contain lower-case letters, digits, hyphens, and underscores, and must be between 1 and 255 characters. For example: chef
  • The full name must begin with a non-white space character and must be between 1 and 1023 characters. For example: "Chef Software, Inc."
  • -f FILE_NAME: Write the ORGANIZATION-validator.pem to FILE_NAME instead of printing it to STDOUT. For example: /tmp/chef.key.

For example, an organization named chef, with a full name of Chef Software, Inc., and with the ORGANIZATION-validator.pem file saved to /tmp/chef.key:

$ chef-server-ctl org-create chef "Chef Software, Inc." -f /tmp/chef.key

Create a User

On the Chef server machine create the USER.pem from the command line using chef-server-ctl. Run the following command:

$ chef-server-ctl user-create USER_NAME FIRST_NAME LAST_NAME EMAIL PASSWORD -f FILE_NAME

where

  • -f FILE_NAME writes the USER.pem to a file instead of STDOUT. For example: /tmp/grantmc.key.

For example: a user named grantmc, with a first and last name of Grant McLennan, an email address of grantmc@chef.io, a poorly-chosen password, and a USER.pem file saved to /tmp/grantmc.key:

$ chef-server-ctl user-create grantmc Grant McLennan grantmc@chef.io p@s5w0rD! -f /tmp/grantmc.key

Move .pem Files

Download the ORGANIZATION-validator.pem and USER.pem files from the Chef Server and move them to the .chef directory.

To move files to the .chef directory:

  1. In a command window, enter each of the following:

    cp /path/to/ORGANIZATION-validator.pem ~/chef-repo/.chef

    and:

    cp /path/to/USERNAME.pem ~/chef-repo/.chef

    where /path/to/ represents the path to the location in which these three files were placed after they were downloaded.

  2. Verify that the files are in the .chef folder.

Create the config.rb File

Navigate to the ~/chef-repo/.chef directory and create the config.rb using the knife configure tool. The file must be created in the .chef folder. It should look similar to:

current_dir = File.dirname(__FILE__)
log_level                :info
log_location             STDOUT
node_name                'node_name'
client_key               "#{current_dir}/USER.pem"
validation_client_name   'ORG_NAME-validator'
validation_key           "#{current_dir}/ORGANIZATION-validator.pem"
chef_server_url          'https://api.chef.io/organizations/ORG_NAME'
cache_type               'BasicFile'
cache_options( :path => "#{ENV['HOME']}/.chef/checksums" )
cookbook_path            ["#{current_dir}/../cookbooks"]

At a minimum, you must update the following settings with the appropriate values:

  • client_key should point to the location of the Chef server user's .pem file on your ChefDK machine.
  • validation_client_name should be updated with the name of the desired organization that was created on the Chef server.
  • validation_key should point to the location of your organization's .pem file on your ChefDK machine.
  • chef_server_url must be updated with the domain or IP address used to access the Chef server.

See the knife config.rb documentation for more details.

Get SSL Certificates

Chef server 12 enables SSL verification by default for all requests made to the server, such as those made by knife and the chef-client. The certificate that is generated during the installation of the Chef server is self-signed, which means there isn't a signing certificate authority (CA) to verify. In addition, this certificate must be downloaded to any machine from which knife and/or the chef-client will make requests to the Chef server.

Use the knife ssl fetch subcommand to pull the SSL certificate down from the Chef server:

knife ssl fetch

See SSL Certificates for more information about how knife and the chef-client use SSL certificates generated by the Chef server.

Verify Install

The ChefDK is installed correctly when it is able to use knife to communicate with the Chef server.

To verify that ChefDK can connect to the Chef server:

  1. In a command window, navigate to the Chef repository:

    cd ~/chef-repo
  2. In a command window, enter the following:

    knife client list

    to return a list of clients (registered nodes and ChefDK installations) that have access to the Chef server. For example:

    chefdk_machine
    registered_node