aws-cloudformation-ec2

# AWS CloudFormation EC2 Infrastructure ## Overview Create production-ready EC2 infrastructure using AWS CloudFormation templates. Covers EC2 instances (On-Demand and SPOT), Security Groups, IAM roles, Application Load Balancers (ALB), template structure, parameters, outputs, and cross-stack references. ## When to Use - Creating EC2 instances (On-Demand or SPOT) with Security Groups and IAM roles - Setting up Application Load Balancers with target groups - Implementing template Parameters, Mappings, Conditions, and cross-stack references ## Instructions ### Step 1 — Define Template Parameters Use AWS-specific parameter types for validation and console dropdowns. ```yaml Parameters: LatestAmiId: Type: AWS::SSM::Parameter::Value<AWS::EC2::Image::Id> Default: /aws/service/ami-amazon-linux-latest/amzn2-ami-hvm-x86_64-gp2 InstanceType: Type: AWS::EC2::InstanceType Default: t3.micro AllowedValues: [t3.micro, t3.small, t3.medium] KeyName: Type: AWS::EC2::KeyPair::KeyName ``` See [template-structure.md](references/template-structure.md) for advanced parameter patterns, mappings, conditions, and cross-stack references. ### Step 2 — Create Security Group Define ingress/egress rules for network access. ```yaml InstanceSecurityGroup: Type: AWS::EC2::SecurityGroup Properties: GroupDescription: Security group for EC2 instance VpcId: !Ref VpcId SecurityGroupIngress: - IpProtocol: tcp FromPort: 80 ToPort: 80 ...