PrometheusErrorSendingAlerts#

When prometheus can't send alert to alertmanager this alert is firing

Warning

some customer have an external alertmanager, this alertmanager is not in our scope but we inform customer with their identified support contact

Customer with an external alertmanger :

FIXME : In the future, the list of external alertmanager will be maintained in zones.json in caascad-zones repo

Troubleshooting hints :

identify if your alertmanger is internal*- or external**
external
- check if external alertmanager is reachable (in your browser http://<ip:port>)
internal
- check if alertmanager is reachable (make your port-forward on alertmanager service and try to reach in your browser)