Practice Test 1 | Google Cloud Certified Professional Cloud DevOps Engineer | Dumps | Mock Test
Your Site Reliability (SRE) team members manage an application deployed in three regions. The application is deployed on Managed Instance Groups placed behind a global HTTP(S) Load balancer. You are applying a critical security patch to the Compute Engines. You successfully patch the instances in the first 2 regions, but you made an error in the patching of the third region which causes requests to that region to fail.
You want to mitigate the impact of unsuccessful patching on users. What should you do?
A. Restart all the Instances in the affected region.
B. Rollback the changes made to region 3.
C. Increase the number of instances in region 3
D. Drain the requests to region 3 and redirect requests to regions 1 and 2.
Correct Answer: D
- Options A and B are incorrect. These options try to fix the problem immediately with no guarantees that it will solve the problem thereby increasing the Mean Time to Repair (MTTR)
- Option C is incorrect. Increasing the number of instances does not mitigate the current incident because it will have the same error as the other instances in the Managed Instance Group.
- Option D is CORRECT. The recommended approach to make the system work as well as it can under the circumstances. This gives you time to fix the errors in region 3 and apply a new patch.
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