Implement system sensors in ietf-hardware model

[mattiaswal]

Description

Expose as much data as possible in ietf-hardware as sensors. Temperature sensors, disk usage, availible memory.

Additional Information

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General Information

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[mattiaswal]

Have made a initial check for this. SNMP has everything in one MIB (HOST-RESOURCES-MIB, but in YANG the only thing (standard) exist is ietf-hardware, which is more focust on hard things, like disk health, temperatures etc. Sensors in other words.

soft things (pure OS things) seems vendors put in ietf-system as auguments in system

suggestion:
ietf-hardware (oper): temp sensors
ietf-system (oper): filesystem status, memory usage, I think CPU metrics belong here as well