advancedScenario-Based & System Design Questions
A production incident review reveals that a critical service had only one running replica for two weeks because a scaling configuration change silently failed to apply.
Beyond the immediate fix (correct the scaling config), the deeper gap is that replica count itself wasn't monitored/alerted on — recommend adding an alert specifically for 'desired replica count' not matching 'actual ready replica count' over a sustained period, so a silent scaling failure is caught immediately rather than discovered only in a postmortem after an extended exposure window.
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