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ddns.template
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ddns.template
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{
"AWSTemplateFormatVersion": "2010-09-09",
"Description": "Buiding a Dynamic DNS for Route 53 using Cloudwatch Events and Lambda based on https://github.com/awslabs/aws-lambda-ddns-function",
"Parameters": {
"LambdaBucketName": {
"Description": "Name of S3 Bucket for where Lambda function zip files are uploaded to",
"Type": "String",
"MinLength": "3"
}
},
"Resources": {
"snsTopic" : {
"Type" : "AWS::SNS::Topic",
"Properties" : {
"Subscription" : [{
"Endpoint" : "[email protected]",
"Protocol" : "email"
}
],
"TopicName" : "DDNSAlerts"
}
},
"ddnslambdarole": {
"Type": "AWS::IAM::Role",
"Properties": {
"AssumeRolePolicyDocument": {
"Version": "2012-10-17",
"Statement": [
{
"Sid": "",
"Effect": "Allow",
"Principal": {
"Service": "lambda.amazonaws.com"
},
"Action": "sts:AssumeRole"
}
]
},
"RoleName": "ddns-lambda-role",
"Policies": [
{
"PolicyName": "ddns-lambda-role",
"PolicyDocument": {
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": "ec2:Describe*",
"Resource": "*"
},
{
"Effect": "Allow",
"Action": [
"dynamodb:*"
],
"Resource": "*"
},
{
"Effect": "Allow",
"Action": [
"logs:CreateLogGroup",
"logs:CreateLogStream",
"logs:PutLogEvents"
],
"Resource": "*"
},
{
"Effect": "Allow",
"Action": [
"route53:*"
],
"Resource": [
"*"
]
},
{
"Effect": "Allow",
"Action": [
"SNS:Publish"
],
"Resource": [
{ "Fn::Join": ["", [ "arn:aws:sns:",{"Ref":"AWS::Region"}, ":",{"Ref":"AWS::AccountId"},":DDNSAlerts"]]}
]
}
]
}
}
]
}
},
"ddnslambda": {
"Type": "AWS::Lambda::Function",
"Properties": {
"Handler": "union.lambda_handler",
"FunctionName": "ddns_lambda",
"Description": "Create A and PTR records for Private Hosted Zone for EC2 instance launches",
"Role": {
"Fn::GetAtt": [
"ddnslambdarole",
"Arn"
]
},
"Code": {
"S3Bucket": {
"Ref": "LambdaBucketName"
},
"S3Key": "union.py.zip"
},
"Runtime": "python3.6",
"Timeout": "90"
}
},
"DdnsRule": {
"Type": "AWS::Events::Rule",
"Properties": {
"Description": "trigger whenever CloudWatch detects a change to the state of an EC2 instance",
"Name": "ec2_lambda_ddns_rule",
"EventPattern": {
"source": [
"aws.ec2"
],
"detail-type": [
"EC2 Instance State-change Notification"
],
"detail": {
"state": [
"running",
"shutting-down",
"stopped"
]
}
},
"State": "ENABLED",
"Targets": [
{
"Arn": {
"Fn::GetAtt": [
"ddnslambda",
"Arn"
]
},
"Id": "TargetFunctionV1"
}
]
}
},
"PermissionForEventsToInvokeLambda": {
"Type": "AWS::Lambda::Permission",
"Properties": {
"FunctionName": {
"Ref": "ddnslambda"
},
"Action": "lambda:InvokeFunction",
"Principal": "events.amazonaws.com",
"SourceArn": {
"Fn::GetAtt": [
"DdnsRule",
"Arn"
]
}
}
}
},
"Outputs": {}
}