Docs shared by trainer: https://github.com/manikabedi/chef

1. Ruby programming language introduction
2. Sample Ruby programs learned.

Continued on Ruby programming code examples

1. Introduction to Chef ==>Define the following: ===>Node, Resource, Recipe, Cookbook, RunList, Roles, Search, Chef Server, Chef development kit, knife, Solo, Zero
2. Oraganizations, Environments, Roles, Nodes
3. Configuration drift, OHAI, RUN List
4. CHEF setup a. https://downloads.chef.io/chef-dk/ b. https://www.chef.io/

PS C:\Users\admin> knife --version Chef: 14.2.0 5. Refer """node-creation.md""" file

1. Chef and its dependencies are installed via an OS system specific package (omnibus installer)

2. Installation includes: a. The ruby language - used by chef b. knife - command line tool for admins c. Chef-client - Client app d. ohai - System profiler

3. root@ip-172-31-1-105:~# cat /etc/chef/client.rb log_level :info chef_server_url "https://api.chef.io/organizations/raj-org1" validation_client_name "chef-validator" log_location STDOUT node_name "node1-unbuntu"

4. Created few chef recipes under chef-repo/cookbooks/my_recipes

5. Worked on cookbooks:

   ---

   PS D:\Rajesh_Ruby\Chef_Training\chef-repo\cookbooks\my_cookbooks> chef generate cookbook apache

   Generating cookbook apache

   • Ensuring correct cookbook file content
   • Ensuring delivery configuration
   • Ensuring correct delivery build cookbook content Your cookbook is ready. Type cd apache 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/integration/default/default_test.rb

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

   recipes/default.rb

6. Upload created/modified cookbook to the Chef Server PS D:\Rajesh_Ruby\Chef_Training\chef-repo\cookbooks> knife cookbook upload apache Uploading apache [0.1.0] Uploaded 1 cookbook.
7. Create run list PS D:\Rajesh_Ruby\Chef_Training\chef-repo\cookbooks> knife node run_list add node1-unbuntu "recipe[apache]" node1-unbuntu: run_list: recipe[apache]
8. On node run below command to pull the changes manually: root@ip-172-31-1-105:~# chef-client
9. Refer cookbooks folder for more cookbooks examples

1. Started day with another cookbook for motd by using templates
2. pci compliance related cookbook added and added motd to depend on this.
3. apache cookbook enhanced for few new things.

1. Fixing of issues task given on apache2

2. Data Bags, Search, User data

   Users: PS D:\Rajesh_Ruby\Chef_Training\chef-repo> knife data_bag create users Created data_bag[users] PS D:\Rajesh_Ruby\Chef_Training\chef-repo> knife data_bag from file users bobo.json Updated data_bag_item[users::bobo] PS D:\Rajesh_Ruby\Chef_Training\chef-repo> knife data_bag from file users frank.json Updated data_bag_item[users::frank]

   Groups: PS D:\Rajesh_Ruby\Chef_Training\chef-repo> knife data_bag create groups Created data_bag[groups] PS D:\Rajesh_Ruby\Chef_Training\chef-repo> knife data_bag from file groups clowns.json Updated data_bag_item[groups::clowns]

   PS D:\Rajesh_Ruby\Chef_Training\chef-repo\cookbooks> chef generate cookbook users Generating cookbook users

   Upload role to the server: PS D:\Rajesh_Ruby\Chef_Training\chef-repo\roles> knife role from file .\webserver.rb Updated Role webserver

Best Practices:

1. Have 'base' roles
2. Chef super market

1. Preparing full cookbook
2. Installed awscli with the help of cookbook. Here is what done for that:

===================================

Before installing: root@ip-172-31-11-17:/etc/selinux/default# aws s3 ls The program 'aws' is currently not installed. You can install it by typing: apt install awscli

cookbook downloaded: cloudcli: Dependencies: poise-python ~> 1.6 Dependencies: poise-languages ~> 2.0 & poise ~> 2.7 Dependencies: poise-archive ~> 1.0 & poise ~> 2.5

Then Upload=>add to run list==>chef-client 

After Installing: root@ip-172-31-11-17:/etc/selinux/default# aws s3 ls Unable to locate credentials. You can configure credentials by running "aws configure".

Step 1: Install Chef DK in workstation

Step 2: Get chef-repo into workstation by using the command: chef generate repo practice

Step 3: Create a sample recipe {Better put it in cookbooks/my_recipes folder for clear understanding}

Step 4: Run the sample recipe in local mode by using the command: chef-client --local-mode webserver.rb

Step 5: Now, its time to start with cookbooks:

From cookbooks folder, run the command: chef generate cookbook learn_chef_httpd [root@ip-172-31-95-250 cookbooks]# pwd /root/chef/practice/Chef_Training/chef-repo/cookbooks [root@ip-172-31-95-250 cookbooks]# chef generate cookbook learn_chef_httpd Generating cookbook learn_chef_httpd - Ensuring correct cookbook file content - Ensuring delivery configuration - Ensuring correct delivery build cookbook content Your cookbook is ready. Type `cd learn_chef_httpd` 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/integration/default/default_test.rb If you'd prefer to dive right in, the default recipe can be found at: recipes/default.rb [root@ip-172-31-95-250 cookbooks]# tree learn_chef_httpd learn_chef_httpd ├── Berksfile ├── CHANGELOG.md ├── chefignore ├── LICENSE ├── metadata.rb ├── README.md ├── recipes │   └── default.rb ├── spec │   ├── spec_helper.rb │   └── unit │   └── recipes │   └── default_spec.rb └── test └── integration └── default └── default_test.rb 7 directories, 10 files Create a template: [root@ip-172-31-95-250 cookbooks]# pwd /root/chef/practice/Chef_Training/chef-repo/cookbooks [root@ip-172-31-95-250 cookbooks]# chef generate template learn_chef_httpd index.html Recipe: code_generator::template * directory[./learn_chef_httpd/templates] action create - create new directory ./learn_chef_httpd/templates - restore selinux security context * template[./learn_chef_httpd/templates/index.html.erb] action create - create new file ./learn_chef_httpd/templates/index.html.erb - update content in file ./learn_chef_httpd/templates/index.html.erb from none to e3b0c4 (diff output suppressed by config) - restore selinux security context [root@ip-172-31-95-250 cookbooks]# tree learn_chef_httpd/ learn_chef_httpd/ ├── Berksfile ├── CHANGELOG.md ├── chefignore ├── LICENSE ├── metadata.rb ├── README.md ├── recipes │   └── default.rb ├── spec │   ├── spec_helper.rb │   └── unit │   └── recipes │   └── default_spec.rb ├── templates │   └── index.html.erb └── test └── integration └── default └── default_test.rb 8 directories, 11 files ==>copy the contents of the HTML file from your recipe to the new HTML file, index.html.erb. ==>Updaterecipes/default.rb with below content: package 'httpd' service 'httpd' do action [:enable, :start] end template '/var/www/html/index.html' do source 'index.html.erb' end ==>Run the cookbook [root@ip-172-31-95-250 cookbooks]# pwd /root/chef/practice/Chef_Training/chef-repo/cookbooks [root@ip-172-31-95-250 cookbooks]# chef-client --local-mode --runlist 'recipe[learn_chef_httpd]' [2018-08-02T12:27:36+00:00] INFO: Started chef-zero at chefzero://localhost:1 with repository at /root/chef/practice/Chef_Training/chef-repo One version per cookbook