prometheus-msteams: [BUG]Prometheus-msteams does not send alerts to msteams channel via proxy server

Your test shows that you can reach prometheus-msteams, but prometheus-msteams does not seem to reach your webhook URL. Next step would be to check whether you see incoming requests at the proxy.

you have to make sure that alertmanager --> prometheus-msteams does not use the proxy (which is presumably running on another host?!). If you export http proxy env variables on the linux host, it will also be picked up by Alertmanager. You can set NO_PROXY env variable for that.

Yeah the error is in the alertmanager, not in prometheus-msteams. So it should be:

Alertmanager --without-proxy–> prometheus-teams —via-proxy–> MS Teams

Between Alertmanager and prometheus-msteams, you shouldn’t require proxy settings, as they seem to run on the same system, don’t they?

You are trying to access prometheus-msteams from Alertmanager using localhost. Can you verify that you can reach prometheus-msteams via localhost from Alertmanager? HOw do you run Alertmanager, also as a systemd process?

I assume, this is how config.yaml looks like?

connectors:
- alert_channel: "WEBHOOK URL"`

Use three “`” backtip-quotes for code-formatting. It should look like this in order to get the above result:

@baraconguyen sorry for being too fast in closing the issue.

Can you describe your infrastructure setup please?