An administrator is configuring a rolling update deployment for an Amazon Elastic Containe… — AWS Certified SysOps Administrator - Associate

An administrator is configuring a rolling update deployment for an Amazon Elastic Container Service (Amazon ECS) service that has a desired task count of $4$ . The deployment must guarantee that the service capacity does not drop below $4$ healthy tasks at any time, but it can scale up to $8$ tasks during the update process. Which deployment configuration parameters should the administrator specify to meet these requirements?

A
Minimum healthy percent: $50\%$ , Maximum percent: $150\%$
B
Minimum healthy percent: $100\%$ , Maximum percent: $100\%$
Minimum healthy percent: $100\%$ , Maximum percent: $200\%$ Cevap
D
Minimum healthy percent: $0\%$ , Maximum percent: $100\%$

Cevap

Minimum healthy percent:

100\%

, Maximum percent:

200\%

Specifying a minimum healthy percent of

100\%

ensures that the service maintains all

4

tasks (

100\%

of the desired count) at all times. Setting the maximum percent to

200\%

permits the deployment to provision up to

8

tasks (

200\%

of the desired count) temporarily. This allows the new task definitions to run alongside the old ones and pass health checks before the old tasks are drained and terminated.

Adım Adım Çözüm

Determine the required minimum healthy percent configuration.

Minimum healthy percent must be set to

100\%

Since the desired task count is

4

, and the capacity must not drop below

4

healthy tasks during the update, the ratio of healthy tasks to desired tasks is

\frac{4}{4} = 100\%

Determine the required maximum percent configuration.

Maximum percent must be set to

200\%

Since the service is allowed to scale up to

8

tasks during the update, the ratio of maximum allowed tasks to desired tasks is

\frac{8}{4} = 200\%

Combine the parameters to define the deployment configuration.

The final parameters are a minimum healthy percent of

100\%

and a maximum percent of

200\%

This specific combination ensures that the new task versions are deployed and verified as healthy before the old task versions are stopped, resulting in a zero-downtime rolling update.

Anahtar Kavram

Amazon ECS rolling update deployment configuration utilizing minimum healthy percent and maximum percent parameters.

Soru

Cevap

Adım Adım Çözüm

Anahtar Kavram

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