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Previously prometheus/alertmanager were unconditionally reloaded every 10 minutes. Reloading alertmanager when it is about to deliver an alert notification seems to make it account successfull notification deliveries as failed, increasing alertmanager_notifications_failed_total. So reloading every 10 minutes caused spurious AlertmanagerNotifications alerts in our setup. Also config updates are now atomic regardless of whether /tmp is a tmpfs. |
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