AWS Cloudformation Session 01
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- The document discusses Infrastructure as Code (IaaC) and AWS CloudFormation (CFN). CFN allows users to model and provision AWS resources from templates to focus on applications rather than managing resources. - Examples are provided demonstrating how to create a LAMP stack on EC2 using CFN templates in JSON and YAML formats. Issues with reusability and portability in templates are highlighted and solutions proposed using dynamic values, mappings, and intrinsic functions. - Later examples show how to handle dependencies and output values using CFN. References are listed for further reading on CFN features.
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AWS Cloudformation Session 01
- 2. Agenda • Infrastructure as Code • What is AWS CloudFormation? • Our Use Case • JSON & YAML • Template Anatomy • CFN Actions • Learn by Example • Other Topics and Features • CloudFormation vs Terraform
- 3. Infrastructure as Code (IaaC) • A process of managing and provisioning data centers through machine readable definition files. • IaaC grew as a response to the difficulty posed from two pieces of technology – utility computing (AWS EC2) and second- generation web frameworks (1st Version of Ruby on Rails). • IaaC ≠ IaaS • Reduced Cost, Faster Execution, Less Errors • Approaches: Declarative (Functional), Imperative (Procedural), Intelligent (Env. Aware) • Methods: Push and Pull
- 4. • AWS CloudFormation is a service that helps you model and set up your Amazon Web Services resources so that you can spend less time managing those resources and more time focusing on your applications that run in AWS. • Initial Release 25th Feb 2011 What is AWS CloudFormation (CFN)?
- 5. • A LAMP Stack is a set of open-source software that can be used to create websites and web applications. LAMP is an acronym, and these stacks typically consist of the Linux operating system, the Apache HTTP Server, the MySQL relational database management system, and the PHP programming language. Linux Operating System Layer Apache Web Server Layer MySQL Database Layer PHP/Perl/Python Scripting Layer WordPress Web Application LAMPStack Use Case: WordPress Instance
- 6. • JavaScript Object Notation • A syntax for storing and exchanging data. • Lightweight, self-describing and easy to understand. • Consists of “Name : Value” pairs separated by “,” enclosed between “{}”. • Names are unique inside the object. • Names and Strings are wrapped by double quotes. JSON
- 8. • YAML Ain’t Markup Language • A syntax for storing and exchanging data. • Human friendly, self-describing and easy to understand. • A superset of JSON. • Consists of “Name : Value” pairs separated by “New Lines”. • Allows in-line comments – begin with ‘#’ -> EOL • Indentation (white spaces) controls the structure. • Avoid using Tabs. YAML
- 12. YAML Vs JSON
- 13. Template Anatomy
- 14. CFN Actions
- 15. WP-Demo-01: MySQL, EC2 & S3
- 16. • What will happen if we created another stack in the same or any other region with the same template? • Stack will succeed • Stack will fail • Stack will partially succeed WP-Demo-01: Question 1
- 17. • What will happen if we created another stack in the same or any other region with the same template? • Stack will succeed • Stack will fail • Stack will partially succeed Bucket name is unique across all regions WP-Demo-01: Question 1
- 18. • What will happen if we deleted this stack and created another stack in another region with the same template? • Stack will succeed • Stack will fail • Stack will partially succeed WP-Demo-01: Question 2
- 19. • What will happen if we deleted this stack and created another stack in another region with the same template? • Stack will succeed • Stack will fail • Stack will partially succeed AMI Id is different across regions WP-Demo-01: Question 2
- 20. • Not reusable – hard coded S3 bucket name • Not portable – hard coded AMI Id • Not reusable – hard coded instance size for EC2 and DB WP-Demo-01 Template Issues
- 21. • Not reusable – hard coded S3 bucket name • Not portable – hard coded AMI Id • Not reusable – hard coded instance size for EC2 and DB • Solution: • Dynamic S3 Bucket Name WP-Demo-01 Template Solutions
- 22. • Not reusable – hard coded S3 bucket name • Not portable – hard coded AMI Id • Not reusable – hard coded instance size for EC2 and DB • Solution: • Dynamic S3 Bucket Name • Dynamic Mapping + Pseudo Parameters + Intrinsic Functions WP-Demo-01 Template Solutions
- 23. • Not reusable – hard coded S3 bucket name • Not portable – hard coded AMI Id • Not reusable – hard coded instance size for EC2 and DB • Solution: • Dynamic S3 Bucket Name • Dynamic Mapping + Pseudo Parameters + Intrinsic Functions • Dynamic Mapping + Parameters + Pseudo Parameters + Intrinsic Functions WP-Demo-01 Template Solutions
- 24. • Reusability in same region • Portability to different regions • Stack Update and Change Set WP-Demo-02: Reusability and Portability
- 25. • Install PHP • Install MySQL • Install Apache • Install WordPress & Configure • Update System User Data
- 26. User Data In Normal Case
- 27. User Data in CFN
- 28. WP-Demo-03: User Data & Dependencies
- 30. References • https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/ReleaseHistory.html • https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/Welcome.html • https://acloud.guru/learn/intro-aws-cloudformation • https://acloud.guru/learn/aws-advanced-cloudformation • https://www.w3schools.com/js/js_json_intro.asp • https://www.tutorialspoint.com/yaml/index.htm • https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/intrinsic-function- reference.html • https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/pseudo-parameter- reference.html • https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/parameters-section- structure.html#aws-specific-parameter-types • https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-attribute- dependson.html
- 32. See You Next Meetup
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