Simple Fusion IO Monitor

I had a powerful need to monitor a single Fusion IO card. Simple check of media status, capacity reserves, blocks good and pages good.

Adjust $confEmailTo, $confEmailFrom and potentially confCapReserveAlarm, confBlocksGoodAlarm, confPagesGoodAlarm.

Run on cron, run manually, run by intern, it's all the same to me.

#!/usr/bin/ruby
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# Authored by Gary Gogick (gary@workhabit.com)
#
# This is a simple script to monitor certain fio-status parameters and alert
# via e-mail if set thresholds are breached.  Specifically, it checks the
# media status, capacity reserves, blocks good and pages good parameters
# of all ioDimm* sections of fio-status -fk.
#
# Configuration parameters are fairly straightforward; the conf*Alarm
# variables should be in the form of a float (eg, 25.0 for 25%)
#
# The following gems are required:
#    inifile
#    mail

require "rubygems"
require "inifile"
require "mail"

### Configuration
$confEmailTo = "from@example.org"
$confEmailFrom = "root@server.example.org"
confCapReserveAlarm = 75.0
confBlocksGoodAlarm = 75.0
confPagesGoodAlarm = 75.0

### Helper functions
def sendmail(subj, msg)
    Mail.deliver do
        from $confEmailFrom
        to $confEmailTo
        subject subj
        body msg
    end
end

### Initial setup and fio probe
# Set message variables
host = `hostname`.strip
message = ""

# Generate fio status report
system 'fio-status -fk > /tmp/fio-status'

# Load report into IniFile
status = IniFile.load("/tmp/fio-status")

### Alert handling
# Loop through ioDimm sections
status.each_section do |i|
    # This is the [ioDimm *] section; additional sections or checks within this section should be easy to add.
    if i =~ /ioDimm */
        section = status[i]
        if section['media_status'] != 'Healthy'
            message = message + "Device #{i}: media_status has failed: #{section['media_status']} (vs Healthy)\n\r"
        end
        if section['capacity_reserves_percent'].to_f < confCapReserveAlarm
            message = message + "Device #{i}: capacity_reserves_percent is #{section['capacity_reserves_percent']} (vs #{confCapReserveAlarm})\n\r"
        end
        if section['blocks_good_percent'].to_f < confBlocksGoodAlarm
            message = message + "Device #{i}: blocks_good_percent is #{section['blocks_good_percent']} (vs #{confBlocksGoodAlarm})\n\r"
        end
        if section['pages_good_percent'].to_f < confPagesGoodAlarm
            message = message + "Device #{i}: pages_good_percent is #{section['pages_good_percent']} (vs #{confPagesGoodAlarm})\n\r"
        end 
    end
end

# Send e-mail alert
if message != ""
    sendmail("FusionIO alert on #{host}", message)
end