executionRoleArn  
  The ARN of the IAM role to be used to run the canary. This role must already exist, and must include lambda.amazonaws.com as a principal in the trust policy. The role must also have the following permissions:
- s3:PutObject
- s3:GetBucketLocation
- s3:ListAllMyBuckets
- cloudwatch:PutMetricData
- logs:CreateLogGroup
- logs:CreateLogStream
- logs:CreateLogStream