Please ignore this. Brian has answered me.
On 18/06/20 4:59 pm, Sayan Das wrote:
Hi,
I have multiple prometheus instances sending alerts to one
alertmanager, which deduplicates the alerts. To ensure alerting
pipeline between each prometheus and alertmanager is working properly,
I want to send a always active alert to the alertmanager. I am
configuring a alert rule in each prometheus which would always
trigger. I have rule:
- alert: WatchDog
annotations:
message: 'This alert should always be active in
alertmanager, to ensure the prometheus-alertmanager integration is
functional. We should be notified immediately if this alert is not active'
expr: vector(1)
labels:
severity: none
The tricky part is how do we differentiate this alert in alertmanager,
since all prometheuses send the same alert. Is there a way to add
labels to a vector v before sending it to the alert manager. I saw
prometheus has alert_relabel_configs, but how do we use it to add
labels to a vector v has no labels ? Can I somehow use label_replace()
or label_join() functions for this use case?
Regards,
Sayan
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