Add new metrics to exporter, and add name labels to every metric

[josebrutalsys]

Additionally, it adds docker-compose to be able to run the environment more easily from local.

[znerol]

Thanks for taking the time to file a PR. Regrettably this is mixing several unrelated feature requests. Hence it cannot be merged as is.

I generally recommend to open an issue for a feature request first so as to give people an opportunity to discuss viability and approach.

That said:

• Deployment recipes should go in the wiki (docker compose).
• Additional labels on resources will lead to duplicated time series in cluster setups. Read the comments in Collect from current node only information about node's VMs/CTs/etc #54 and the linked blog posts for hints on how to join labels on pve_guest_info or pve_storage_info to the metrics.
• I personally will not merge anything which touches ClusterNodeConfigCollector or which wants to iterate through self._pve.nodes.get(). This has been a source of trouble for many users in the past. If there is somebody who wants to maintain that part and understands its quirks and also support people whose clusters are running into errors because of that, then please see Looking for a Co-maintainer #84.

Please don't be sad because of this rejection. I'm trying to answer/decide on PRs early instead of letting them float around eternally.