Munin contributed plugins

     busy    : similar to iostat %b, %w (%w usually indicates 0 in Sol10,11)

     queue   : similar to iostat actv, wait

     latency : similar to iostat asvc_t, wsvc_t

  This plugin is improved from Solaris io_busy_, io_ops_, io_bytes_ plugins.

  Any device found in /usr/bin/kstat can be monitored.

    It may be good to link like ln -s /path/to/io_disk io_nfs if necessary.

  env.module_regex - kstat module. See man kstat -m option.

    default:  /^(s?sd|vdc|zvblk|dad|md)$/

  env.title_type - Device type shown in graph title.

# Set environment variables

plugin_name=io

: "${class:=disk}"

: "${module:=sd}"

: "${module_regex:=/^(s?sd|vdc|zvblk|dad|md)\$/}"

    case "$func" in

    ops)

        conf_title='I/O Operations'

        conf_gargs='--base 1000'

        conf_vlabel='Ops per second write (-) / read (+)'

        ;;

    bytes)

        conf_title='I/O Throughput'

        conf_gargs='--base 1024'

        conf_vlabel='Bytes per second write (-) / read (+)'

        ;;

    busy)

        conf_title='Busy & Wait'

        conf_gargs='--base 1000 --lower-limit 0 --upper-limit 100'

        conf_vlabel='% wait (-) / busy (+)'

        ;;

    queue)

        conf_title='Queue Length'

        conf_gargs='--base 1000'

        conf_vlabel='Queue length wait (-) / actv (+)'

        ;;

    latency)

        conf_title='Latency'

        conf_gargs='--base 1000'

        conf_vlabel='Seconds wsvc_t (-) / asvc_t (+)'

        ;;

    *)

        echo "Unknown function: $func"

        ref="name_$dev"

        devname=${!ref:-}  # ${!varname} means indirect evaluation (similar to eval)

            for stat in reads writes

            do

                echo "${dev}_$stat.label dummy" 

                echo "${dev}_$stat.type DERIVE"

                echo "${dev}_$stat.min 0"

            done

        echo "${dev}_${conf_out}.label dummy" 

        echo "${dev}_${conf_out}.graph no"

        echo "${dev}_${conf_out}.type DERIVE"

        echo "${dev}_${conf_out}.min 0"

        echo "${dev}_${conf_in}.label ${devname:-${dev}}"

        echo "${dev}_${conf_in}.negative ${dev}_${conf_out}"

        echo "${dev}_${conf_in}.type DERIVE"

        echo "${dev}_${conf_in}.min 0"

        fi

    done

    func=$1

    preconfig "$func"

        stat_regex="/^($conf_in|$conf_out|reads|writes)\$/"

        stat_regex="/^($conf_in|$conf_out)\$/"

    echo "multigraph ${plugin_name}_${func}_${module}"