Add a nat_traffic collector for prometheus-node-exporter-ucode,
ported from the equivalent Lua collector in prometheus-node-exporter-lua.
Reads /proc/net/nf_conntrack and exports per-(src, dst) pair byte
totals (both directions summed) as node_nat_traffic gauge metrics.
Also includes a ucode-based unit test with a fixture file that can be
run locally with: ucode test/nat_traffic.uc
Signed-off-by: Ricard Nacher <ricard.nacher@midokura.com>
Some properties may not yet be available, properly guard them.
Fixes error like:
daemon.err uhttpd[2116]: error running collector 'wifi':
daemon.err uhttpd[2116]: left-hand side expression is null
Signed-off-by: Andre Heider <a.heider@gmail.com>
Etienne Champetier
Ricard Nacher
George Sapkin
Anirudh Srinivasan
Andre Heider