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Custom-Resource-Example.template
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Custom-Resource-Example.template
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{
"AWSTemplateFormatVersion" : "2010-09-09",
"Description" : "Dynamic AWS CloudFormation Template for Amazon Linux or Windows: Gets the most recent HVM-based Amazon Linux or Windows 2012 R2 AMI ID via AWS Lambda.",
"Parameters" : {
"KeyPairName" : {
"Description" : "Public/private key pairs allow you to securely connect to your instance after it launches",
"Type" : "AWS::EC2::KeyPair::KeyName"
},
"InstanceType" : {
"Description" : "EC2 Instance Type",
"Type" : "String",
"Default" : "t2.micro",
"AllowedValues" : [
"t1.micro",
"t2.micro",
"t2.small",
"t2.medium"
],
"ConstraintDescription" : "Must be a valid EC2 instance type."
},
"OSType" : {
"Description" : "Select Operating System",
"Type" : "String",
"Default" : "Amazon Linux",
"AllowedValues" : [
"Amazon Linux",
"Windows Server 2012 R2"
]
},
"ModuleName" : {
"Description" : "The name of the JavaScript file",
"Type" : "String",
"Default" : "amilookup"
},
"S3Bucket" : {
"Description" : "The name of the bucket that contains your packaged source",
"Type" : "String"
},
"S3Key" : {
"Description" : "The name of the ZIP package",
"Type" : "String",
"Default" : "amilookup.zip"
}
},
"Conditions" : {
"IsLinux" : {
"Fn::Equals" : [
{
"Ref" : "OSType"
},
"Amazon Linux"
]
}
},
"Resources" : {
"EC2Instance" : {
"Type" : "AWS::EC2::Instance",
"Properties" : {
"InstanceType" : {
"Ref" : "InstanceType"
},
"ImageId" : {
"Fn::GetAtt" : [
"AMIInfo",
"Id"
]
},
"KeyName" : {
"Ref" : "KeyPairName"
}
}
},
"AMIInfo" : {
"Type" : "Custom::AMIInfo",
"Properties" : {
"ServiceToken" : {
"Fn::GetAtt" : [
"AMIInfoFunction",
"Arn"
]
},
"Region" : {
"Ref" : "AWS::Region"
},
"OSType" : {
"Fn::If" : [
"IsLinux",
"amzn-ami-hvm*.x86_64-gp2",
"Windows_Server-2012-R2_RTM-English-64Bit-Base-*"
]
}
}
},
"AMIInfoFunction" : {
"Type" : "AWS::Lambda::Function",
"Properties" : {
"Code" : {
"S3Bucket" : {
"Ref" : "S3Bucket"
},
"S3Key" : {
"Ref" : "S3Key"
}
},
"Handler" : {
"Fn::Join" : [
"",
[
{
"Ref" : "ModuleName"
},
".handler"
]
]
},
"Role" : {
"Fn::GetAtt" : [
"LambdaExecutionRole",
"Arn"
]
},
"Runtime" : "nodejs6.10",
"Timeout" : "60"
}
},
"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:CreateLogGroup",
"logs:CreateLogStream",
"logs:PutLogEvents"
],
"Resource" : "arn:aws:logs:*:*:*"
},
{
"Effect" : "Allow",
"Action" : [
"ec2:DescribeImages"
],
"Resource" : "*"
}
]
}
}
]
}
}
},
"Outputs" : {
"AMIID" : {
"Description" : "The Amazon EC2 instance AMI ID.",
"Value" : {
"Fn::GetAtt" : [
"AMIInfo",
"Id"
]
}
}
}
}