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# Creates the aggregate traffic graphs for the web site. See:
# Meant to be run on the web site and call out to the LibreNMS API.
# One thing that was handy here was leveraging Libre's concept of
# groups here to use this to identify ports we wanted to aggregate up.
# These are identified as "peering" in this script.
# The script should be added to cron with something like:
# */5 * * * * /usr/local/sbin/ > /dev/null 2>&1
export TZ="UTC"
caldate=`date +'%Y/%m/%d %H:%M'`
now=`date +%s`
dayago=$((now - daysecs))
weekago=$((now - weeksecs))
TEXT="Aggregate Traffic - Created at $caldate $TZ"
# For the website the image should be 853×225 pixels.
# If you ask for 853×225, you will get 934x264 as there is a
# fixed pad for height and width. You need to ask for 772x186.
# I haven't seen how to add a title via the API so I cam using
# Imagemagick's "convert" to overlay the image I got from LibreNMS.
# `apt-get install imagemagick` will be needed for Ubuntu.
curl -H "X-Auth-Token: $token"\?legend=no\&type=multiport_bits\&from=$dayago\&to=$now\&width=$width\&height=$height > daily_tmp.png
convert -fill black -pointsize 12 -draw "text 300,12 '$TEXT'" daily_tmp.png daily.png
rm daily_tmp.png
mv daily.png $outdir
curl -H "X-Auth-Token: $token"\?legend=no\&type=multiport_bits\&from=$weekago\&to=$now\&width=$width\&height=$height > week_tmp.png
convert -fill black -pointsize 12 -draw "text 300,12 '$TEXT'" week_tmp.png week.png
rm week_tmp.png
mv week.png $outdir