* Fix for #945, cpu temperature is signed.
Added a type conversion to cpu temperature sysctl. Will still
collect/report -1 when the value is -1, this is because it should be up
to interpretation whether this is the correct value for the system or
not.
Some drivers will report -1 for cpu temperature. Other sensors will
report "an input into the fan control algorithm", i.e. not the actual
temperature, but how much fan it wants. Some people cool their machines
with liquid nitrogen.
Signed-off-by: Derek Marcotte <554b8425@razorfever.net>
* Unify CPU collector conventions
Add a common CPU metric description.
* All collectors use the same `nodeCpuSecondsDesc`.
* All collectors drop the `cpu` prefix for `cpu` label values.
* Fix subsystem string in cpu_freebsd.
* Fix Linux CPU freq label names.
* Move NodeCollector into package collector
* Refactor collector enabling
* Update README with new collector enabled flags
* Fix out-of-date inline flag reference syntax
* Use new flags in end-to-end tests
* Add flag to disable all default collectors
* Track if a flag has been set explicitly
* Add --collectors.disable-defaults to README
* Revert disable-defaults flag
* Shorten flags
* Fixup timex collector registration
* Fix end-to-end tests
* Change procfs and sysfs path flags
* Fix review comments
Named return variables should only be used to describe the returned type
further, e.g. `err error` doesn't add any new information and is just
stutter.
This removes the requirement to run `node_exporter` as root or with read
access to `/dev/kmem` in order to get CPU usage statistics.
Once FreeBSD adds a macro for the `kern.cp_times` sysctl, the
`setupSysctlMIBs()` function should be replaced by usage of the macro.
