I don't use alertmanager clustering myself, but if you search this group for "alertmanager duplicates" or "alertmanager alert_relabel_configs" you'll find the answer. Example: https://groups.google.com/d/topic/prometheus-users/S9Xmg8209xE/discussion
As I understand it, it's your responsibility to remove the "replica" label using alert_relabel_configs, using "action: labeldrop". Otherwise, a different label set makes these look like different alerts. You also need to make sure the alertmanagers themselves are properly configured to gossip to each other, so they'll deduplicate alerts amongst themselves. -- You received this message because you are subscribed to the Google Groups "Prometheus Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to prometheus-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/14201529-86e8-4ff1-903a-89d93fd2ffad%40googlegroups.com.
