AWS CloudFormation is a service that allows you to define and provision, in an automated and secure manner, all the infrastructure resources in your cloud environment. Templates are JSON or YAML files that define the resources you want to create.
Here are some commonly used AWS CloudFormation templates:
EC2 Instance Template: This template defines an EC2 instance with specific configurations, such as the instance type, image ID, and key pair.
RDS Database Instance: This template sets up a managed RDS database instance, specifying the database engine, instance class, and storage settings.
S3 Bucket: This template creates an S3 bucket with specific permissions and policies.
IAM Role: This template creates an IAM role with specific permissions that can be assumed by other AWS services or users.
For more templates and examples, you can visit the AWS CloudFormation Templates GitHub repository.
Common Template Elements
Parameters: These are variables that can be passed to the template at runtime, allowing for flexibility and customization.
Mappings: These are key-value pairs that can be used to define multiple values for a single key.
Resources: These are the AWS resources that are created by the template, such as EC2 instances, S3 buckets, and IAM roles.
Outputs: These are the values that are output by the template, allowing you to retrieve information about the resources that were created.
How to Use Templates
To use a CloudFormation template, you can:
- Upload the template to the AWS Management Console.
- Create a stack using the template, specifying any parameters that are required.
- Review and deploy the stack.
For more information on how to use CloudFormation templates, you can visit the AWS CloudFormation User Guide.