Smart monitoring on Linux

  • Firstly install gsmartcontrol (Using apt-get or yum depending on OS)
yum -y install gsmartcontrol
  • Now, enable SMART on each of your disks (This may be done already but better safe than sorry)

Eg:

smartctl --smart=on /dev/sda
  • Now, copy the below script and make it executable:

/usr/share/check-mk-agent/local/smart

#!/bin/bash

# Only handle always updated values, add device path and vendor/model
if which smartctl > /dev/null 2>&1 ; then
    #
    # if the 3ware-utility is found
    # get the serials for all disks on the controller
    #
    if which tw_cli > /dev/null 2>&1 ; then
        # support for only one controller at the moment
        TWAC=$(tw_cli show | awk 'NR < 4 { next } { print $1 }' | head -n 1)

       # - add a trailing zero to handle case of unused slot
       #   trailing zeros are part of the device links in /dev/disk/by-id/... anyway
       # - only the last 9 chars seem to be relevant
       # (hopefully all this doesn't change with new kernels...)
        eval `tw_cli /$TWAC show drivestatus | grep -E '^p[0-9]' | awk '{print $1 " " $7 "0"}' | while read twaminor serial ; do
            twaminor=${twaminor#p}
            serial=${serial:(-9)}
            serial=AMCC_${serial}00000000000
            echo "$serial=$twaminor"
        done`
    fi

    echo '<<<smart>>>'
    SEEN=
    for D in /dev/disk/by-id/{scsi,ata}-*; do
        [ "$D" != "${D%scsi-\*}" ] && continue
        [ "$D" != "${D%ata-\*}" ] && continue
        [ "$D" != "${D%-part*}" ] && continue
        N=$(readlink $D)
        N=${N##*/}
        if [ -r /sys/block/$N/device/vendor ]; then
            VEND=$(tr -d ' ' < /sys/block/$N/device/vendor)
        else
            # 2012-01-25 Stefan Kaerst CDJ - in case $N does not exist
            VEND=ATA
        fi
        if [ -r /sys/block/$N/device/model ]; then
            MODEL=$(sed -e 's/ /_/g' -e 's/_*$//g' < /sys/block/$N/device/model)
        else
            MODEL=$(smartctl -a $D | grep -i "device model" | sed -e "s/.*:[ ]*//g" -e "s/\ /_/g")
        fi
        # Excluded disk models for SAN arrays or certain RAID luns that are also not usable..
        if [ "$MODEL" = "iSCSI_Disk" ] || ["$MODEL" = "LOGICAL_VOLUME" ]; then
            continue
        fi

        # Avoid duplicate entries for same device
        if [ "${SEEN//.$N./}" != "$SEEN" ] ; then
            continue
        fi
        SEEN="$SEEN.$N."

        # strip device name for final output
        DNAME=${D#/dev/disk/by-id/scsi-}
        DNAME=${DNAME#/dev/disk/by-id/ata-}
        # 2012-01-25 Stefan Kaerst CDJ - special option in case vendor is AMCC
        CMD=
        if [ "$VEND" == "AMCC" -a -n "$TWAC" ]; then
            DNAME=${DNAME#1}
            [ -z "${!DNAME}" ] && continue
            CMD="smartctl -d 3ware,${!DNAME} -v 9,raw48 -A /dev/twa0"
            # create nice device name including model
            MODEL=$(tw_cli /$TWAC/p${!DNAME} show model | head -n 1 | awk -F= '{ print $2 }')
            MODEL=${MODEL## }
            MODEL=${MODEL// /-}
            DNAME=${DNAME#AMCC_}
            DNAME="AMCC_${MODEL}_${DNAME%000000000000}"
        elif [ "$VEND" != "ATA" ] ; then
            TEMP=
            # create temperature output as expected by checks/smart
            # this is a hack, TODO: change checks/smart to support SCSI-disks
            eval `smartctl -d scsi -i -A $D | while read a b c d e ; do
                [ "$a" == Serial ] && echo SN=$c
                [ "$a" == Current -a "$b" == Drive  -a "$c" == Temperature: ] && echo TEMP=$d
            done`
            [ -n "$TEMP" ] && CMD="echo 194 Temperature_Celsius 0x0000 000 000 000 Old_age Always - $TEMP (0 0 0 0)"
            DNAME="${VEND}_${MODEL}_${SN}"
        else
            CMD="smartctl -d ata -v 9,raw48 -A $D"
        fi

        [ -n "$CMD" ] && $CMD | grep Always | egrep -v '^190(.*)Temperature(.*)' | sed "s|^|$DNAME $VEND $MODEL |"
    done 2>/dev/null
fi
  • Re-inventory the server from Check_MK and it will pick up the SMART checks from your disks

Any comments or questions? Get in touch here or Email me at [email protected]