Nov 192014

Power SupplyIf you are responsible for keeping systems up and running it’s important to keep an eye on your hardware. This especially denotes to hard disks, fans and power supplies as they break most often. Today’s post is about how to easily and automatically check the state of power supplies.

To do so I wrote a small script that uses ipmitool to check the state of all detected power supplies. I used it primarily on Supermicro X9 class motherboards however all systems supported by ipmitool should work.

The USPs of my script are that it supports more than two power supplies, that it is fully documented and that it reports a unique exit code per system state. All this features help you to integrate it perfectly into your workflow. Here’s how to use it:

$ ./ -h
This tool checks the state of all installed power supplies and reports their current state. It can be used in automated monitoring tools like nagios.
It depends on ipmitool and supports all systems that report the state of the installed power supplies through the sensors subcommand. I used it primarily on Supermicro X9 class motherboards.

Usage: ./
	-h 	Shows this help
	-p=2	The number of expected power supplies
	-r=0x1	The value that indicates a working power supply (see ipmitool sensors)

./ -p=3 	# Check 3 installed power supplies
./		# Check 2 installed power supplies
./ -r=0x4	# A working power supply reports a state of 0x4

Exit codes:
	0	All power supplies are working
	1	ipmitool is not installed
	2	Found more power supplies than expected
	3	At least one power supply is missing
	4	At least one power supply failed

Version 1 released in 2014 by Florian Bogner -

If you are interested you can download the script over at Google Code.

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