Plantilla de AWS Lambda
La siguiente plantilla utiliza un recurso personalizado y la función de AWS Lambda (Lambda) para adjuntar un nuevo grupo de seguridad a una lista de grupos de seguridad existentes. Esta función es útil cuando se quiere crear una lista de los grupos de seguridad de forma dinámica, de forma que la lista incluye tanto los grupos de seguridad nuevos como ya existentes. Por ejemplo, puede transferir una lista de los grupos de seguridad existentes como parámetro de valor, añadir el nuevo valor a la lista y, a continuación, asociar todos los valores a una instancia de EC2. Para obtener más información acerca del tipo de recurso de una función de Lambda, consulte AWS::Lambda::Function.
En el ejemplo, cuando CloudFormation crea el recurso personalizado AllSecurityGroups, CloudFormation invoca la función de Lambda AppendItemToListFunction. CloudFormation pasa la lista de los grupos de seguridad existentes y un nuevo grupo de seguridad (NewSecurityGroup) a la función, que adjunta el nuevo grupo de seguridad a la lista y, a continuación, devuelve la lista modificada. CloudFormation utiliza la lista modificada para asociar todos los grupos de seguridad al recurso de MyEC2Instance.
JSON
{ "AWSTemplateFormatVersion": "2010-09-09", "Parameters": { "ExistingSecurityGroups": { "Type": "List<AWS::EC2::SecurityGroup::Id>" }, "ExistingVPC": { "Type": "AWS::EC2::VPC::Id", "Description": "The VPC ID that includes the security groups in the ExistingSecurityGroups parameter." }, "InstanceType": { "Type": "String", "Default": "t2.micro", "AllowedValues": [ "t2.micro", "m1.small" ] } }, "Mappings": { "AWSInstanceType2Arch": { "t2.micro": { "Arch": "HVM64" }, "m1.small": { "Arch": "HVM64" } }, "AWSRegionArch2AMI": { "us-east-1": { "HVM64": "ami-0ff8a91507f77f867", "HVMG2": "ami-0a584ac55a7631c0c" }, "us-west-2": { "HVM64": "ami-a0cfeed8", "HVMG2": "ami-0e09505bc235aa82d" }, "us-west-1": { "HVM64": "ami-0bdb828fd58c52235", "HVMG2": "ami-066ee5fd4a9ef77f1" }, "eu-west-1": { "HVM64": "ami-047bb4163c506cd98", "HVMG2": "ami-0a7c483d527806435" }, "eu-central-1": { "HVM64": "ami-0233214e13e500f77", "HVMG2": "ami-06223d46a6d0661c7" }, "ap-northeast-1": { "HVM64": "ami-06cd52961ce9f0d85", "HVMG2": "ami-053cdd503598e4a9d" }, "ap-southeast-1": { "HVM64": "ami-08569b978cc4dfa10", "HVMG2": "ami-0be9df32ae9f92309" }, "ap-southeast-2": { "HVM64": "ami-09b42976632b27e9b", "HVMG2": "ami-0a9ce9fecc3d1daf8" }, "sa-east-1": { "HVM64": "ami-07b14488da8ea02a0", "HVMG2": "NOT_SUPPORTED" }, "cn-north-1": { "HVM64": "ami-0a4eaf6c4454eda75", "HVMG2": "NOT_SUPPORTED" } } }, "Resources": { "SecurityGroup": { "Type": "AWS::EC2::SecurityGroup", "Properties": { "GroupDescription": "Allow HTTP traffic to the host", "VpcId": { "Ref": "ExistingVPC" }, "SecurityGroupIngress": [ { "IpProtocol": "tcp", "FromPort": 80, "ToPort": 80, "CidrIp": "0.0.0.0/0" } ], "SecurityGroupEgress": [ { "IpProtocol": "tcp", "FromPort": 80, "ToPort": 80, "CidrIp": "0.0.0.0/0" } ] } }, "AllSecurityGroups": { "Type": "Custom::Split", "Properties": { "ServiceToken": { "Fn::GetAtt": [ "AppendItemToListFunction", "Arn" ] }, "List": { "Ref": "ExistingSecurityGroups" }, "AppendedItem": { "Ref": "SecurityGroup" } } }, "AppendItemToListFunction": { "Type": "AWS::Lambda::Function", "Properties": { "Handler": "index.handler", "Role": { "Fn::GetAtt": [ "LambdaExecutionRole", "Arn" ] }, "Code": { "ZipFile": { "Fn::Join": [ "", [ "var response = require('cfn-response');", "exports.handler = function(event, context) {", " var responseData = {Value: event.ResourceProperties.List};", " responseData.Value.push(event.ResourceProperties.AppendedItem);", " response.send(event, context, response.SUCCESS, responseData);", "};" ] ] } }, "Runtime": "nodejs20.x" } }, "MyEC2Instance": { "Type": "AWS::EC2::Instance", "Properties": { "ImageId": { "Fn::FindInMap": [ "AWSRegionArch2AMI", { "Ref": "AWS::Region" }, { "Fn::FindInMap": [ "AWSInstanceType2Arch", { "Ref": "InstanceType" }, "Arch" ] } ] }, "SecurityGroupIds": { "Fn::GetAtt": [ "AllSecurityGroups", "Value" ] }, "InstanceType": { "Ref": "InstanceType" } } }, "LambdaExecutionRole": { "Type": "AWS::IAM::Role", "Properties": { "AssumeRolePolicyDocument": { "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Principal": { "Service": [ "lambda.amazonaws.com" ] }, "Action": [ "sts:AssumeRole" ] } ] }, "Path": "/", "Policies": [ { "PolicyName": "root", "PolicyDocument": { "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": [ "logs:*" ], "Resource": "arn:aws:logs:*:*:*" } ] } } ] } } }, "Outputs": { "AllSecurityGroups": { "Description": "Security Groups that are associated with the EC2 instance", "Value": { "Fn::Join": [ ", ", { "Fn::GetAtt": [ "AllSecurityGroups", "Value" ] } ] } } } }
YAML
AWSTemplateFormatVersion: '2010-09-09' Parameters: ExistingSecurityGroups: Type: List<AWS::EC2::SecurityGroup::Id> ExistingVPC: Type: AWS::EC2::VPC::Id Description: The VPC ID that includes the security groups in the ExistingSecurityGroups parameter. InstanceType: Type: String Default: t2.micro AllowedValues: - t2.micro - m1.small Mappings: AWSInstanceType2Arch: t2.micro: Arch: HVM64 m1.small: Arch: HVM64 AWSRegionArch2AMI: us-east-1: HVM64: ami-0ff8a91507f77f867 HVMG2: ami-0a584ac55a7631c0c us-west-2: HVM64: ami-a0cfeed8 HVMG2: ami-0e09505bc235aa82d us-west-1: HVM64: ami-0bdb828fd58c52235 HVMG2: ami-066ee5fd4a9ef77f1 eu-west-1: HVM64: ami-047bb4163c506cd98 HVMG2: ami-0a7c483d527806435 eu-central-1: HVM64: ami-0233214e13e500f77 HVMG2: ami-06223d46a6d0661c7 ap-northeast-1: HVM64: ami-06cd52961ce9f0d85 HVMG2: ami-053cdd503598e4a9d ap-southeast-1: HVM64: ami-08569b978cc4dfa10 HVMG2: ami-0be9df32ae9f92309 ap-southeast-2: HVM64: ami-09b42976632b27e9b HVMG2: ami-0a9ce9fecc3d1daf8 sa-east-1: HVM64: ami-07b14488da8ea02a0 HVMG2: NOT_SUPPORTED cn-north-1: HVM64: ami-0a4eaf6c4454eda75 HVMG2: NOT_SUPPORTED Resources: SecurityGroup: Type: AWS::EC2::SecurityGroup Properties: GroupDescription: Allow HTTP traffic to the host VpcId: !Ref ExistingVPC SecurityGroupIngress: - IpProtocol: tcp FromPort: 80 ToPort: 80 CidrIp: 0.0.0.0/0 SecurityGroupEgress: - IpProtocol: tcp FromPort: 80 ToPort: 80 CidrIp: 0.0.0.0/0 AllSecurityGroups: Type: Custom::Split Properties: ServiceToken: !GetAtt AppendItemToListFunction.Arn List: !Ref ExistingSecurityGroups AppendedItem: !Ref SecurityGroup AppendItemToListFunction: Type: AWS::Lambda::Function Properties: Handler: index.handler Role: !GetAtt LambdaExecutionRole.Arn Code: ZipFile: !Join - '' - - var response = require('cfn-response'); - exports.handler = function(event, context) { - ' var responseData = {Value: event.ResourceProperties.List};' - ' responseData.Value.push(event.ResourceProperties.AppendedItem);' - ' response.send(event, context, response.SUCCESS, responseData);' - '};' Runtime: nodejs20.x MyEC2Instance: Type: AWS::EC2::Instance Properties: ImageId: !FindInMap - AWSRegionArch2AMI - !Ref AWS::Region - !FindInMap - AWSInstanceType2Arch - !Ref InstanceType - Arch SecurityGroupIds: !GetAtt AllSecurityGroups.Value InstanceType: !Ref InstanceType LambdaExecutionRole: Type: AWS::IAM::Role Properties: AssumeRolePolicyDocument: Version: '2012-10-17' Statement: - Effect: Allow Principal: Service: - lambda.amazonaws.com Action: - sts:AssumeRole Path: / Policies: - PolicyName: root PolicyDocument: Version: '2012-10-17' Statement: - Effect: Allow Action: - logs:* Resource: arn:aws:logs:*:*:* Outputs: AllSecurityGroups: Description: Security Groups that are associated with the EC2 instance Value: !Join - ', ' - !GetAtt AllSecurityGroups.Value
