Google Professional Cloud DevOps Engineer Question 252
Single answerGoogle Cloud PlatformYour team manages a web application hosted on Google Cloud, and you have defined an SLO that 99.9% of requests should respond within 500ms over a rolling 30-day period. You are tasked with configuring an alerting policy to notify the team if the error budget is exhausted too quickly. How should you configure the alerting policy?
- A
Set an alert condition to trigger when the error budget is consumed by 50% in one day.
- B
Set an alert condition to trigger when the latency exceeds 500ms for any request.
- C
Set an alert condition to trigger when the error budget consumption rate exceeds 2% per hour.
- D
Set an alert condition to trigger when 99.9% of requests fail within a 5-minute window.
Show answer and explanation
Correct answer: C
Explanation
The correct approach to configure an alert for an SLO is to monitor the error budget consumption rate. In this scenario, setting the alert to trigger when the error budget consumption rate exceeds 2% per hour ensures that the team is notified when the error budget is being consumed too quickly, allowing them to take corrective actions before the budget is fully depleted.
- A. Incorrect.
This is a good approach to monitor rapid error budget consumption, but it is too aggressive and may lead to unnecessary alerts. The error budget consumption rate is a more refined metric.
- B. Incorrect.
This does not align with the SLO since the SLO measures compliance over a rolling 30-day period and not individual request latencies. Triggering on every request exceeding 500ms would create too many false positives.
- C. Correct.
This is the correct answer because it monitors the error budget consumption rate and ensures you are alerted when the error budget is being exhausted too quickly based on a reasonable timeframe.
- D. Incorrect.
This is incorrect because it focuses on the number of failed requests within a short period, which does not align with the rolling 30-day SLO defined for the application.