node_exporter running as container collects network statistics from container interfaces #581
Description
Host operating system: output of uname -a
Linux domo 4.9.0-0.bpo.2-amd64 #1 SMP Debian 4.9.18-1~bpo8+1 (2017-04-10) x86_64 GNU/Linux
node_exporter version: output of node_exporter -version
node_exporter, version 0.14.0 (branch: master, revision: 840ba5d)
build user: root@bb6d0678e7f3
build date: 20170321-12:12:54
go version: go1.7.5
Are you running node_exporter in Docker?
Yes. Have only found README.md, which does not mention this bug.
What did you do that produced an error?
What did you expect to see?
Network statistics of the host
What did you see instead?
Network statistics of the container
netdev_linux.go works with procFilePath("net/dev"). /host/proc/net is a soft link to /host/proc/self/net (net -> self/net). Therefore the statistics get collected from the devices of the /bin/node_exporter process.
Alternatively the statistics could be collected from /host/sys/class/net, which are the statistics of the host devices.