Munin-node Plugin Configurations

HDD Temperature

You can usually identify which hard disks are on your system by looking in "/proc/ide" and in "/proc/scsi".

# cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: ATA      Model: WDC WD2500YS-01S Rev: 20.0
  Type:   Direct-Access                    ANSI SCSI revision: 05
Host: scsi1 Channel: 00 Id: 00 Lun: 00
  Vendor: ATA      Model: WDC WD2500YS-01S Rev: 20.0
  Type:   Direct-Access                    ANSI SCSI revision: 05

`fdisk -l` lists the two drives as "sda" and "sdb".

Here's the output of `smartctl -a -d ata /dev/sda`:

Device Model:     WDC WD2500YS-01SHB1
Serial Number:    WD-WCANY4128422
Firmware Version: 20.06C06
User Capacity:    251,000,193,024 bytes
Device is:        Not in smartctl database [for details use: -P showall]
ATA Version is:   7
ATA Standard is:  Exact ATA specification draft version not indicated
Local Time is:    Wed Dec 24 23:52:19 2008 CST
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

In order to monitor HDD temperature, edit "/etc/munin/plugin-conf.d/hddtemp_smartctl":

[hddtemp_smartctl]
user root
env.drives sda sdb
env.args_sda -d ata
env.args_sdb -d ata

Test output via:

# env drives="sda sdb" args_sda="-d ata" args_sdb="-d ata" /etc/munin/plugins/hddtemp_smartctl

Which should show the temperature in Celsius:

sda.value 28
sdb.value 28

Restart munin-node and wait a while for the munin graphs to show up.

Check the log, "/var/log/munin/munin-node.log" for troubleshooting.

hddtemp_smartctl plugin does not send out email notification by default and has to be specified on a per host basis in "munin.conf":

[foo.example.com]
    address 127.0.0.1
    use_node_name yes
    hddtemp_smartctl.sda.critical 55
    hddtemp_smartctl.sda.critical 55

Reference: munin alert email notification

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.

Test with munin-run

Below is the actual way to be testing plugins, as it automatically reads the conf file and runs as the correct user.

munin-run hddtemp_smartctl

Reference: Concise guide to plugin authoring

Good idea, but only works with newer distros (or old drives)

The big problem with smart is that it was not compatible with SATA drives for a very long time (all through CentOS 4.x for example). I believe the latest CentOS 5 now supports smart on SATA so you can once again monitor hard drive temperatures.

So if you are running an older system with a PATA drive this works, or a newer system with SATA and a recent kernel 2.6 that works too. There's just a big gap of several years in the middle where smart was generally useless due to no SATA support.

Post new comment

  • Lines and paragraphs break automatically.
  • You may post code using <code>...</code> (generic) or <?php ... ?> (highlighted PHP) tags.

More information about formatting options

CAPTCHA
This question is for testing whether you are a human visitor and to prevent automated spam submissions.
Image CAPTCHA
Enter the characters shown in the image.
Comment