In counter have a set value option

[Robbo312]

Would be handy to have a set value option in the counter like guage. The source I'm using (Total kWh in a energy meter) so I just need to set the value not increase it by a certain amount.

[jdeisenh]

Seconded.
It's not only handy, but necessary if you want to pass through counters that originate somewhere else.
Making them gauges is simply not an option, it won't handle resets correctly, which is the whole point of having counters.

[matterlobby]

Unfortunately, the underlying library (prom-client) does not support setting values of "Counter" type metrics explicitly:
https://github.com/siimon/prom-client/blob/master/lib/counter.js

As you can see in the code, it includes a setValue function internally, but does not expose it in the Counter class. The only workaround seems to me to first reset the value and then increment by the new value.

[hashworks]

#19 solves this by adding a reset parameter, which, if set, resets the metric before the operation. This way this payload behaves like a set operation:

{
    reset: true,
    op: "inc",
    val: 5000,
}