There is requirement to call cloud formation template from Lambda function.

• I am trying to schedule dev environment using cloud formation & lambda function.

Query: This code is running perfectly via AWS console. Now I have stored this code in S3 as .yaml file and calling via lambda function as snippet in attached image. I have key pair already created in AWS console that I need to pass as parameter in the following code and what will be value for capabilities section. Request you to please suggest. I am struggling to find the solution for it.

Lambda Function Code

import boto3 cf = boto3.client('cloudformation') def lambda_handler(event, context): res = cf.create_stack( StackName=('SampleStack'), TemplateURL='https://YourObjectUrl', ** Parameters=[ { 'ParameterKey': 'A Parameter', 'ParameterValue': 'A Value' }, ], Capabilities=[ 'CAPABILITY_IAM', 'CAPABILITY_NAMED_IAM',, ] ** )

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Cloud formation .yaml file code

**--- Parameters: SecurityGroupDescription: Description: Security Group Description Type: String KeyName: Description: Key Pair for EC2 Type: 'AWS::EC2::KeyPair::KeyName'

Resources: EC2Instance1: Type: AWS::EC2::Instance Properties: AvailabilityZone: us-east-1a ImageId: ami-051f7e7f6c2f40dc1 InstanceType: t2.micro SecurityGroups: - !Ref EC2SecurityGroup KeyName: !Ref KeyName UserData: Fn::Base64: !Sub | #!/bin/bash yum update -y yum install -y httpd systemctl start httpd systemctl enable httpd #echo "<h1>Hello from Region us-east-2a</h1>" > /var/www/html/index.html

EC2Instance2: Type: AWS::EC2::Instance Properties: AvailabilityZone: us-east-1b ImageId: ami-051f7e7f6c2f40dc1 InstanceType: t2.micro SecurityGroups: - !Ref EC2SecurityGroup KeyName: !Ref KeyName UserData: Fn::Base64: !Sub | #!/bin/bash yum update -y yum install -y httpd systemctl start httpd systemctl enable httpd #echo "<h1>Hello from Region us-east-2b</h1>" > /var/www/html/index.html

security group

ELBSecurityGroup: Type: AWS::EC2::SecurityGroup Properties: GroupDescription: ELB Security Group SecurityGroupIngress: - IpProtocol: tcp FromPort: 80 ToPort: 80 CidrIp: 0.0.0.0/0

EC2SecurityGroup: Type: AWS::EC2::SecurityGroup Properties: GroupDescription: !Ref SecurityGroupDescription SecurityGroupIngress: - IpProtocol: tcp FromPort: 80 ToPort: 80 SourceSecurityGroupId: Fn::GetAtt: - ELBSecurityGroup - GroupId - IpProtocol: tcp FromPort: 22 ToPort: 22 CidrIp: 0.0.0.0/0

Load Balancer for EC2

LoadBalancerforEC2: Type: AWS::ElasticLoadBalancing::LoadBalancer Properties: AvailabilityZones: [us-east-1a, us-east-1b] Instances: - !Ref EC2Instance1 - !Ref EC2Instance2 Listeners: - LoadBalancerPort: '80' InstancePort: '80' Protocol: HTTP HealthCheck: Target: HTTP:80/ HealthyThreshold: '3' UnhealthyThreshold: '5' Interval: '30' Timeout: '5' SecurityGroups: - !GetAtt ELBSecurityGroup.GroupId**