Practice Test 4 | Google Cloud Certified Professional Cloud Architect | Dumps | Mock Test
You have to deploy an update to your scalable app, operating with managed instance groups but you cannot undergo any service disruption during the migration.
You have already tested the new configuration and you need to deploy it in the fastest and safest way.
Which is the best solution?
A. Use a new Template and everything will be automatic.
B. Use a new Template, then start new instances and stop the old ones.
C. Use a new Template and ask for a Rolling update.
D. Use a new Template and ask for a Canary update.
Correct Answer – C
A is incorrect. Instance Template are immutable so you have to create a new Instance Template and update the Managed Group Definition
B is incorrect. It is not advisable to do such a manual operation. It’s cumbersome and prone to errors.
C is correct. With managed instance group updater, you may roll out an update automatically based on your specifications:
- maxSurge is the number of Instances beyond the targetSize of the group
- maxUnavailable set the number of instances unavailable at any time during the update
- Minimal action: if the updater has to REPLACE or RESTART the Instances
D is incorrect. A canary update is a partial update to a few numbers of instances in the instance group. The requirement was to deploy it in all the VMs in the fastest and safest way
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