The course note of AWS Certified Solutions Architect - Associate 2018
AWS Certified Solutions Architect - Associate 2018
https://www.udemy.com/aws-certified-solutions-architect-associate
https://aws.amazon.com/tw/certification/certified-solutions-architect-associate/
https://aws.amazon.com/tw/answers/infrastructure-management/crr-monitor/
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-instance-metadata.html