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Given a Managed Instance Group with autohealing enabled and a health check failing on one instance, what happens next?

medium📝 service behavior Q4 of 15
GCP - Cloud SQL and Databases
Given a Managed Instance Group with autohealing enabled and a health check failing on one instance, what happens next?
AThe unhealthy instance is deleted and replaced automatically
BThe instance is restarted but not replaced
CThe instance remains running without changes
DThe entire group is deleted
Step-by-Step Solution
Solution:

  1. Step 1: Understand autohealing behavior

    When a health check fails, autohealing deletes and replaces the unhealthy instance.

  2. Step 2: Identify correct outcome

    The unhealthy instance is replaced automatically to maintain availability.

  3. Final Answer:

    The unhealthy instance is deleted and replaced automatically -> Option A

  4. Quick Check:

    Autohealing replaces unhealthy instances [OK]
Quick Trick: Autohealing deletes and replaces failing instances [OK]
Common Mistakes:
  • Thinking instance only restarts without replacement
  • Assuming group deletion on one failure
  • Ignoring autohealing effects

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