Add fallback for missing /proc/1/mounts (#1172)

* Add fallback for missing /proc/1/mounts

On some systems, `/proc/1/mounts` is hidden from non-root users due to
the `hidepid` procfs feature. Attempt to fallback to `/proc/mounts` if
`/proc/1/mounts` is not found.

Signed-off-by: Ben Kochie <superq@gmail.com>

* Add tests.

Signed-off-by: Ben Kochie <superq@gmail.com>

* Add CHANGELOG entry.

Signed-off-by: Ben Kochie <superq@gmail.com>
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Ben Kochie 2018-11-30 14:01:55 +01:00 committed by GitHub
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### Changes
* [BUGFIX]
* [BUGFIX] Add fallback for missing /proc/1/mounts #1172
* [CHANGE] Add TCPSynRetrans to netstat default filter #1143
* [ENHANCEMENT] Add Infiniband counters #1120
* [FEATURE] Add a flag to disable exporter metrics #1148