AWS Classroomnotes 27/Apr/2022

AWS EC2 Instances contd…

• Instance Lifecycle: The billing which we discuss ove here is limited to on-demand instances
  • Refer Here for the article
    
    
    
• When we stop and start the ec2 instance
  • Following will not be changed:
    • private ip address
    • disk contents
    • instance size
  • Following will be changed:
    • public ip address
    • physical host on which your ec2 instance is created in AWS AZ.
• If you want to retain the public ip addres we need to create an Elastic IP (Static Public IP Address).
• Exercise: Create an ec2 instance of size t2.micro in any region. observe the instance states
  • Stop the ec2 instance (Before stopping make note of public ip)
  • Start the ec2 instance (Observe the public ip)
  • Now restart the ec2 instance and findout if the public ip is changed or not.
• AWS EC2 per second billing for on-demand instances:
  • AWS by default uses per hour as unit for ec2 instance.
    
• AWS Service Limits: By default, each AWS account has limits to the number of instances of a particular service you will be able to launch. Sometimes, those limits apply to a single region. The limits can be increase by raising tickets to AWS
  
  
  
• We can view all the quotas per service in the quotas dashboard
  
• Exercise: When we launch an aws ec2 instance we see some thing about status checks. Can you find out what they are?
  • What does status check pass mean and fail mean.