Expose max bandwidth info for network interface.

[whypro]

Host operating system: output of uname -a

Linux cs54 4.4.0-62-generic #83-Ubuntu SMP Wed Jan 18 14:10:15 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

node_exporter version: output of node_exporter --version

node_exporter, version 0.15.2+ds (branch: debian/sid, revision: 0.15.2+ds-1)
  build user:       pkg-go-maintainers@lists.alioth.debian.org
  build date:       20171214-15:26:08
  go version:       go1.9.2

node_exporter command line flags

Are you running node_exporter in Docker?

No.

What did you do that produced an error?

My purpose is adding a prometheus rule that send alert when network traffic is up to 90% of the max bandwidth of NICs. Like node_network_interface_max_bandwidth:

rate(node_network_transmit_bytes{device=~"ens\\d+|eth\\d+|bond\\d+"}[5m]) / on(device, instance) (node_network_interface_max_bandwidth{device=~"ens\\d+|eth\\d+|bond\\d+"} * 1024 * 1024 / 8) > 0.9

What did you expect to see?

I expect to see some metric providers network interface max bandwidth info.

What did you see instead?

But I didn't find any metric to expose this info.

[SuperQ]

I think this is a dupe of #300

[whypro]

Thank you, I am closing this issue.