Pushgateway Heartbeat Gotcha: When ndots and NetworkPolicy Silently Eat Your Alerts
How ndots:5, a wildcard DNS record, and a default-deny NetworkPolicy combine to swallow CronJob heartbeats without a single error or alert.
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How ndots:5, a wildcard DNS record, and a default-deny NetworkPolicy combine to swallow CronJob heartbeats without a single error or alert.