Netdata chart for Bandwith used since reboot

bandwidth.chart.sh

# no need for shebang - this file is loaded from charts.d.plugin
# netdata
# This has to go unter /usr/libexec/netdata/charts.d/bandwidth.chart.sh or /etc/netdata/charts.d/bandwidth.chart.sh or /opt/netdata/netdata-plugins/charts.d/bandwidth.chart.sh
# real-time performance and health monitoring, done right!
# (C) 2016 Costa Tsaousis <[email protected]>

bandwidth_update_every=1
bandwidth_priority=100

# Should this chart be enabled?
bandwidth_enabled=1

bandwidth_check() {
        #  - 0 to enable the chart
        #  - 1 to disable the chart

        if [ ${bandwidth_update_every} -lt 1 ]
                then
                # there is no meaning for shorter than 1 seconds
                # the kernel changes this value every 1 seconds
                bandwidth_update_every=1
        fi

        [ ${bandwidth_enabled} -eq 0 ] && return 1
        return 0
}

bandwidth_create() {
  # Defines the "Style" of the Chart:
  # CHART type.id name title units [family [context [charttype [priority [update_every [options [plugin [module]]]]]]]]
  # DIMENSION id [name [algorithm [multiplier [divisor [hidden]]]]]
  # see: https://github.com/firehol/netdata/wiki/External-Plugins
cat <<EOF
CHART system.bandwidth 'bandwidth' "System used bandwidth" "MBytes" "traffic" system.bandwidth line $((bandwidth_priority + 1)) $bandwidth_update_every
DIMENSION sent 'sent' absolute 1
DIMENSION recived 'recived' absolute 1
EOF

        return 0
}

bandwidth_update() {
  # Here should be all "magic" goes for calculate your measurements
  sent=$[$(cat /proc/net/dev | grep $(ip route  | grep default | awk '{print $5}') | awk '{print $10}')/1000000]
  recived=$[$(cat /proc/net/dev | grep $(ip route  | grep default | awk '{print $5}') | awk '{print $2}')/1000000]
  cat <<VALUESEOF
BEGIN system.bandwidth
SET sent = ${sent}
SET recived = ${recived}
END
VALUESEOF

        return 0
}