Prometheus Alertmanagers Config Path_Prefix

[bgut...@avarteq.de]

Hi there,

I am currently using the Prometheus Bosh Release. I configured Alertmanager and Prometheus in such a way that both are using an external_url. 

Now I am facing the problem that Prometheus is not able to trigger alerts to the Alertmanager because of using the IP without any prefix to the url. 

The Bosh release starts the Alertmanager with the -alertmanager.url="IP:9093" option. I've tried to add the prefix by configuring the following:

        alerting:

          alertmanagers:

          - path_prefix: "/alertmanager"

          - scheme: http

When I check the error logs of Prometheus I can see that it is trying to reach alertmanagerIP:9093/api/v1/alerts instead of alertmanagerIP:9093/alertmanager/api/v1/alerts.

Is it possible that the /path_prefix is not working with the -alertmanager.url option ?

Thanks for your help,

Regards,

Benjamin

[nas...@news360.com]

I had the same problem. Turns out (for me) that the "/" was in the wrong position.

I changed 

        alerting:
          alertmanagers:
          - path_prefix: "/alertmanager"
          - scheme: http

to

        alerting:
          alertmanagers:
          - path_prefix: "alertmanager/"
          - scheme: http

and now it works. Hope it works for you (if you still needs it, since it's been a long time)