AWS CloudFormation Templates
AWS CloudFormation Templates are the basis for a CloudFormation stack. It is a JSON or YAML-formatted text file that describes the infrastructure resources needed and their dependencies. The template follows a specified schema, allowing users to specify resources, configurations, and mapping values. By using CloudFormation templates, you can automate, version, and reuse your AWS service configurations. This helps in managing and updating an infrastructure in a predictable and efficient manner.
A Guide to AWS CloudFormation Templates
What is AWS CloudFormation Templates?
AWS CloudFormation templates are JSON or YAML-formatted text files. They are used to define and provision all the AWS resources needed for an application, in a safe and repeatable way.
Why is it important?
With AWS CloudFormation, you can model and provision all your cloud infrastructure resources. This helps you spend less time managing resources and more time focusing on your applications that run in AWS.
How it works?
AWS CloudFormation works by reading and interpreting a template file, creating and provisioning the corresponding AWS resources defined in the template.
Exam Tips: Answering Questions on AWS CloudFormation Templates
1. Know the template structure: Remember that the structure includes Format Version, Description, Metadata, Parameters, Mappings, Conditions, Transform, Resources, and Outputs.
2. Understand intrinsic functions and pseudo parameters: These components can perform various tasks from joining two strings to returning the current AWS region.
3. Get familiar with CloudFormation Helper Scripts: These scripts are not enforced to use but can simplify the creation of complex stacks.
4. Always remember the order of Creation: AWS CloudFormation follows a set order of resource creation. Always remember this as it's a common exam question.
5. Rollback Triggers: Understanding how AWS CloudFormation handles stack operation failures is crucial for any solution architect.
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