AWS - Auto Scaling
You want to schedule your Auto Scaling group to scale down to 2 instances every day at 11 PM UTC and scale up to 6 instances every weekday at 7 AM UTC. Which configuration correctly achieves this?
You want to schedule your Auto Scaling group to scale down to 2 instances every day at 11 PM UTC and scale up to 6 instances every weekday at 7 AM UTC. Which configuration correctly achieves this?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand the requirement
Scaling down daily at 11 PM UTC and scaling up weekdays at 7 AM UTC requires two scheduled actions with appropriate recurrence.Step 2: Analyze cron expressions
'cron(0 23 * * ? *)' triggers daily at 11 PM UTC; 'cron(0 7 ? * MON-FRI *)' triggers weekdays at 7 AM UTC.Step 3: Confirm DesiredCapacity values
Set DesiredCapacity to 2 for scale down and 6 for scale up.Final Answer:
Create two scheduled actions: one with Recurrence 'cron(0 23 * * ? *)' setting DesiredCapacity to 2, and another with Recurrence 'cron(0 7 ? * MON-FRI *)' setting DesiredCapacity to 6 -> Option BQuick Check:
Separate scheduled actions with correct recurrence for each scale event [OK]
Quick Trick: Use separate scheduled actions with correct cron recurrences [OK]
Common Mistakes:
MISTAKES- Combining times in one cron expression incorrectly
- Using StartTime without Recurrence for recurring schedules
- Replacing scheduled scaling with dynamic scaling policies
Master "Auto Scaling" in AWS
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