Uchit Vyas gave a presentation on infrastructure automation using Chef at the DevOps Summit in Pune. Chef is an open-source tool that allows users to define infrastructure as code and automate the deployment and configuration of servers. It uses Ruby scripts and a library of reusable components called cookbooks to manage and deploy server configurations. During a Chef client run, it registers nodes, synchronizes cookbooks, compiles resources, and configures nodes to match the defined infrastructure code.

1. www.reancloud.com
September 23, 2016
Cloud Participates at
DevOps Summit, Pune
Speaker: Uchit Vyas

2. 2
Infrastructure Automation
with Chef
By: Uchit Vyas
(Cloud Architect)

3. 3
Uchit’s Introduction
• Working @ REAN Cloud, India
• Infrastructure Automation Domain
• Authored 4 books on Cloud with the following titles &
counting:

4. 4
Code Infrastructure
Infrastructure Code
Infrastructure AS Code

5. 5
Building and Managing
Infrastructure
Programmatically

6. 6
At High Level
 A Custom Library
 A Configuration Management Platform
 A System Integration Platform
 Fine-grained API for Infrastructure
 Fine-grained API and Auditing

7. 7
Chef Principles
 It’s a Language
 Idempotency
 Managed State of Infrastructure
 Reasonability

8. 8
Chef with Automation
Infrastructure
DeploymentProvisioning

9. 9
Infrastructure-as-Code: Chef
 Configuration of your Servers
 Versioning Capability
 Managed Source-code
 Managed CM as Idempotent Resources

10. 10
Chef Components

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Managing Complexity
 Organizations
 Environments
 Roles
 Nodes
 Recipes
 Cookbooks
 Search

12. 12
Chef: Develop, Test and Deploy
Image source: https://docs.chef.io/chef_overview.html

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Chef-client Run
While initiating chef-client execution, it executes all steps to bring the
node into the expected end state, including:
 Registering/Re-registering and authenticating the node with the Chef server
 Building the node object
 Synchronizing cookbooks from chef-server by validating associated roles
and cookbooks for given node
 Compiling associated resources by loading each of the required cookbooks,
including recipes, attributes, libraries and all other dependencies
 Performing the appropriate and required actions to configure bring the node
into expected state
 Looking for exceptions (if any) and notifications, handling each as required
by the logic

14. 14
Chef-Client Run
Image source: https://docs.chef.io/chef_overview.html

15. 15
It’s All Ruby
http://wiki.opscode.com/display/chef/Just+Enough+Ruby+for+Chef
“Just Enough Ruby for Chef”

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