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Elastic Beanstalk (with other AWS Services (RDS (if the Elastic beanstalk…

- - - - Web Environment Tier
        
        Every Environment has a CNAME url pointing to the ELB, aliased in Route 53 to ELB url
        
        EC2 server instance with container type
        
        host manager (HM) runs on each EC2 server instance:
        
        ELB、ASG、EC2s
      - Worker Environment Tier
        
        background jobs
        
        include an Auto Scaling group, one or more Amazon EC2 instances, and an IAM role
        
        provisions an SQS queue if one doesn’t exist
        support SQS dead letter queues
        
        IAM role、ASG、EC2s
        
        Daemon is responsible for pulling requests from an SQS queue
      - One environment cannot support two different environment tiers because each requires its own set of resources; a worker environment tier and a web server environment tier each require an Auto Scaling group, but Elastic Beanstalk supports only one Auto Scaling group per environment.