Silences are configured in the web interface of the Alertmanager.

[Roy-Martin Antonsen]

I have been using Promethus for a while now, and have not found the need to silence any alarms before now.

Reading the documentation it says: Silences are configured in the web interface of the Alertmanager.

So here is my question, is there a seperate alertmanager web interface??

Since i cant find silence in the Promtheus web interface http://server9090/alerts, i suspect it is. 

If yes, is this something that has to be configured or set up?

[Brian Candler]

Yes, alertmanager has its own web interface.  By default it is at http://server:9093/

This lets you view active alerts and create silences.  There are also third-party tools which can do this by talking to the Alertmanager API - karma is one.