Solution:Step 1: Check Auto Scaling group size limitsIf the group is already at its maximum size, it cannot add more instances.Step 2: Understand other optionsAlarm threshold met since alarm triggered; SNS subscription unrelated to scaling; alarm linked to scaling policy as it triggered.Final Answer

[Solved] A CloudWatch alarm triggers an Auto Scaling policy to add instances, but the number of instances does not increase.... | AWS

AWS - CloudWatch

A CloudWatch alarm triggers an Auto Scaling policy to add instances, but the number of instances does not increase. The Auto Scaling group has a maximum size of 5, and currently 5 instances are running. What is the reason?

ASNS topic subscription is missing.

BThe alarm threshold is not met.

CThe Auto Scaling group has reached its maximum size limit.

DThe alarm is not linked to any scaling policy.

Step-by-Step Solution

Solution:

Step 1: Check Auto Scaling group size limits
If the group is already at its maximum size, it cannot add more instances.
Step 2: Understand other options
Alarm threshold met since alarm triggered; SNS subscription unrelated to scaling; alarm linked to scaling policy as it triggered.
Final Answer:
The Auto Scaling group has reached its maximum size limit. -> Option C
Quick Check:
Max size limits prevent scaling beyond set number [OK]

Quick Trick: Auto Scaling respects max size limits, no extra instances added [OK]

Common Mistakes:

MISTAKES

Ignoring max size limit effect
Confusing SNS subscription with scaling
Assuming alarm not linked if triggered

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What is the reason?

Step 1: Check Auto Scaling group size limits

Step 2: Understand other options

Final Answer:

Quick Check:

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