09 Linux Academy - Certified Chef Developer Basic Chef Fluency Badge- Lecture: Understanding Chef Cookbooks & Generating a Cookbook

gistfile1.txt

#Cookbooks
+ A cookbook is the fundamental unit of configuration and policy distribution when using Chef
+ Cookbook contains
  1. Recipes
  1. Attribute Files
  1. File distributions
  1. Templates
  1. Any extensions to Chef such as libraries and custom resources    

+ Chef cookbook defines a scenario. For example, in case of an Apache cookbook
+ The cookbook defines everything needed to install and configure Apache
+ Modules and additional Apache configurations required for the application can be broken down into individual recipes within the cookbook.
+ README.md - located inside of cookbooks/cookbookname/README.md. Text to HTML conversion
+ metadata.rb - 
Common Metadata settings
  1. chef_version
  1. depends (for include_recipe, cookbook dependencies)
  1. version of the cookbook
  
  #metadata.rb
  
          name 'mycookbook'
          maintainer 'The Authors'
          maintainer_email '[email protected]'
          license 'all_rights'
          description 'Installs/Configures mycookbook'
          long_description 'Installs/Configures mycookbook'
          version '0.1.0'
          depends 'mysql','>=1.0'
  
  #Default cookbook recipe
  + default.rb
  + main part of the configuration for the cookbook generally lives here
  
  #Generating a Cookbook
  + Terminal log
        C:\Users\shinidharan\Documents\GitHub> ssh [email protected]
        Warning: Permanently added '54.87.32.159' (ECDSA) to the list of known hosts.
        [email protected]'s password:
        Last login: Sun Jan  8 01:29:00 2017 from c-76-104-43-10.hsd1.va.comcast.net

        [user@gsmurali1 ~]$ sudo su
        [sudo] password for user:
        [root@gsmurali1 user]# ls
        chefdk-1.1.16-1.el7.x86_64.rpm  Desktop  learn.rb  nodes  VNCHOWTO  xrdp-chansrv.log
        [root@gsmurali1 user]# cd /root
        [root@gsmurali1 ~]# ls
        swap  workstation
        [root@gsmurali1 ~]# rm workstation/
        rm: cannot remove ‘workstation/’: Is a directory
        [root@gsmurali1 ~]# rmdir workstation/
        rmdir: failed to remove ‘workstation/’: Directory not empty
        [root@gsmurali1 ~]# cd workstation/
        [root@gsmurali1 workstation]# ls
        Berksfile  chefignore  metadata.rb  README.md  recipes  spec  test
        [root@gsmurali1 workstation]# cd recipes
        [root@gsmurali1 recipes]# ls
        default.rb
        [root@gsmurali1 recipes]# cd ..
        [root@gsmurali1 workstation]# cp /root/learn.rb recipes/
        cp: cannot stat ‘/root/learn.rb’: No such file or directory
        [root@gsmurali1 workstation]# exit
        exit
        [user@gsmurali1 ~]$ ls
        chefdk-1.1.16-1.el7.x86_64.rpm  Desktop  learn.rb  nodes  VNCHOWTO  xrdp-chansrv.log
        [user@gsmurali1 ~]$ pwd
        /home/user
        [user@gsmurali1 ~]$ sudo su
        [root@gsmurali1 user]# ls
        chefdk-1.1.16-1.el7.x86_64.rpm  Desktop  learn.rb  nodes  VNCHOWTO  xrdp-chansrv.log
        [root@gsmurali1 user]# cp learn.rb /root/workstation/recipes
        [root@gsmurali1 user]# cd /root/workstation/
        [root@gsmurali1 workstation]# ls
        Berksfile  chefignore  metadata.rb  README.md  recipes  spec  test
        [root@gsmurali1 workstation]# cd recipes/
        [root@gsmurali1 recipes]# ls
        default.rb  learn.rb
        [root@gsmurali1 recipes]# vim default.rb
        [root@gsmurali1 recipes]# cd ..
        [root@gsmurali1 workstation]# chef-client --local-mode recipes/default.rb
        [2017-01-08T01:45:49+00:00] WARN: No config file found or specified on command line, using command line options.
        [2017-01-08T01:45:49+00:00] WARN: No cookbooks directory found at or above current directory.  Assuming /root/workstatio
        n.
        Starting Chef Client, version 12.17.44
        resolving cookbooks for run list: []
        Synchronizing Cookbooks:
        Installing Cookbook Gems:
        Compiling Cookbooks...
        [2017-01-08T01:45:53+00:00] WARN: Node gsmurali1.mylabserver.com has an empty run list.
        Converging 1 resources
        Recipe: @recipe_files::/root/workstation/recipes/default.rb
          * yum_package[tree] action install
            - install version 1.6.0-10.el7 of package tree

        Running handlers:
        Running handlers complete
        Chef Client finished, 1/1 resources updated in 11 seconds
        [root@gsmurali1 workstation]# tree
        .
        ├── Berksfile
        ├── chefignore
        ├── metadata.rb
        ├── nodes
        │   └── gsmurali1.mylabserver.com.json
        ├── README.md
        ├── recipes
        │   ├── default.rb
        │   └── learn.rb
        ├── spec
        │   ├── spec_helper.rb
        │   └── unit
        │       └── recipes
        │           └── default_spec.rb
        └── test
            └── smoke
                └── default
                    └── default_test.rb

        8 directories, 10 files
        [root@gsmurali1 workstation]#