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Zorluk: OrtaDeployment Strategies

A developer is using AWS CodeDeploy to perform an in-place deployment of an application to an EC2 Auto Scaling group containing 44 running instances. The application must maintain at least 75%75\% of its traffic-serving capacity during the deployment process to handle regular user traffic. The developer also wants to avoid launching any new EC2 instances to minimize additional costs.

Which of the following CodeDeploy configurations will meet these requirements? (Select TWO.)

  1. The CodeDeployDefault.OneAtATime default deployment configurationCevap
  2. A custom deployment configuration with the minimum healthy hosts parameter set to a host count of 33Cevap
  3. C
    The CodeDeployDefault.HalfAtATime default deployment configuration
  4. D
    A custom deployment configuration with the minimum healthy hosts parameter set to a fleet percentage of 25%25\%
  5. E
    The CodeDeployDefault.AllAtOnce default deployment configuration

Cevap

The correct configurations are the CodeDeployDefault.OneAtATime default deployment configuration and a custom deployment configuration with the minimum healthy hosts parameter set to a host count of 33.
The correct options are the default configuration that updates one host at a time and the custom configuration that specifies a minimum of 33 healthy hosts. With a desired capacity of 44 instances, maintaining 75%75\% capacity means at least 33 instances must remain online and healthy during the deployment. The configuration that deploys to one instance at a time will update exactly 11 instance, leaving 33 active (75%75\%). Similarly, setting the custom minimum healthy hosts to a host count of 33 explicitly forces CodeDeploy to maintain 33 healthy instances throughout the process.

Adım Adım Çözüm

1
Calculate the number of healthy instances required to meet the 75%75\% capacity threshold.
For a fleet of 44 instances, 75%75\% capacity requires at least 33 instances to remain healthy and online (4×0.75=34 \times 0.75 = 3).
To understand the minimum healthy host constraint needed for the deployment configuration.
2
Analyze the default and custom CodeDeploy configurations against the calculated constraint.
CodeDeployDefault.OneAtATime updates 11 instance at a time, leaving 33 online (75%75\%). A custom configuration with minimum healthy hosts set to a host count of 33 explicitly guarantees 33 online instances.
To identify which specific configurations satisfy the target constraint of keeping at least 33 instances healthy.

Anahtar Kavram

AWS CodeDeploy deployment configurations and minimum healthy hosts settings for EC2 deployments
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Konular

Deployment Strategies

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