How do i create my own chef cookbook?

amurleopard

chef man page: http://bit.ly/2oPbYOn
knife node man page: http://bit.ly/2pCe5sO
knife cookbook man page: http://bit.ly/2q8P6wS

Start by creating a structure for a cookbook.

$ chef generate cookbook cowsay
Generating cookbook cowsay
- Ensuring correct cookbook file content
- Ensuring delivery configuration
- Ensuring correct delivery build cookbook content

Your cookbook is ready. Type `cd cowsay` to enter it.

There are several commands you can run to get started locally developing and testing your cookbook.
Type `delivery local --help` to see a full list.

Why not start by writing a test? Tests for the default recipe are stored at:

test/smoke/default/default_test.rb

If you'd prefer to dive right in, the default recipe can be found at:

recipes/default.rb

This creates the following structure

$ tree cowsay
cowsay
├── Berksfile
├── chefignore
├── metadata.rb
├── README.md
├── recipes
│   └── default.rb
├── spec
│   ├── spec_helper.rb
│   └── unit
│       └── recipes
│           └── default_spec.rb
└── test
    └── smoke
        └── default
            └── default_test.rb

7 directories, 8 files

This is for demonstration purposes and to show the steps, we are only going to use recipes/default.rb. This is one of the files where you define what you want your cookbook to do. You can see the other files and directories from the tree structure, each has a function within the cookbook. See the descriptions in this link: https://docs.chef.io/cookbooks.html

Edit the file recipes/default.rb add the following and save. This very basic action to install one package called cowsay, that's it.

package "cowsay" do
   action :install
end

Instruct the node on what to install. Our node is called sector12, edit the node, where it says "run_list": under that line add "recipe[cowsay]", and save.

$ sudo knife node edit sector12

{
  "name": "sector12",
  "chef_environment": "_default",
  "normal": {
    "tags": [

    ]
  },
  "policy_name": null,
  "policy_group": null,
  "run_list": [
      "recipe[cowsay]"
]

}

Upload the cookbook to the chef server.

$ knife cookbook upload  cowsay
Uploading cowsay         [0.1.0]
Uploaded all cookbook.

Run chef-client on sector12 (client/node).

sector12> $ sudo chef-client
Starting Chef Client, version 13.0.118
resolving cookbooks for run list: ["cowsay"]
Synchronizing Cookbooks:
  - cowsay (0.1.0)
Installing Cookbook Gems:
Compiling Cookbooks...
Converging 1 resources
Recipe: cowsay::default
  * apt_package[cowsay] action install
    - install version 3.03+dfsg1-16 of package cowsay

Running handlers:
Running handlers complete
Chef Client finished, 1/1 resources updated in 04 seconds

sector12> $ cowsay -f tux "Hello World!"
 ______________
< Hello World! >
 --------------
   \
    \
        .--.
       |o_o |
       |:_/ |
      //   \ \
     (|     | )
    /'\_   _/`\
    \___)=(___/