Compatibility with pushgateway not exposing /metrics/job/...

[geofholbrook]

The push methods require a jobName and POST/PUT to the endpoint /metrics/job/<jobName>. This makes it incompatible with Gravel Gateway (https://github.com/sinkingpoint/prometheus-gravel-gateway), possibly other gateways that don't expose this endpoint.

Perhaps it would be appropriate to not require the jobName, and simply push to /metrics if it is not supplied? Or, implement some kind of override. I'd be happy to make a PR if we can agree on the appropriate interface.

[SimenB]

@zbjornson thoughts on this one?

[vkhytskyi-allegro]

Hello 👋🏼 Any updates on that? At my company we have just faced the same challenge and for us it is necessary to be able to override the target endpoint.

[geofholbrook]

I created a PR to address this issue: #597