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Answer: Implement an Uptime check for the load balancer's IP address with an alerting policy for notifications
The correct approach is to create an Uptime check for the load balancer's IP address, as it minimizes administrative overhead. Other options either require excessive management, like setting up checks for each VM or installing additional services, or are less reliable, such as relying on Cloud Logging alerts which need specific configurations. Creating individual checks for each VM is impractical, especially with many instances, and could lead to false alarms if instances are replaced while the application remains available.
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Your company is hosting an application on Compute Engine behind a global load balancer. You need to monitor the application's availability and alert the on-call engineer if it's down for more than five minutes. What's the most efficient method with the least management overhead?
A
Set up Cloud Logging alerts to notify you when the application is down
B
Install a custom service on each instance to send failure notifications
C
Configure Uptime checks for each VM's IP address with an alerting policy for notifications
D
Implement an Uptime check for the load balancer's IP address with an alerting policy for notifications
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