bandwidth-manager.cron

#!/bin/bash
# this script uses tautulli to measure the WAN bandwidth used by plex streams, and updates deluge max upload to ensure that streams are never interrupted by torrents
# it is designed to be ran with cron, examples below
# also make sure to fill out each of the parameters to match your setup

##### EXAMPLE CRON USAGE (runs every 30 seconds when using both lines) #####
# * * * * * /path/to/bandwidth-manager.cron >> /path/to/bandwidth-manager.log 2>&1
# * * * * * sleep 30 && /path/to/bandwidth-manager.cron >> /path/to/bandwidth-manager.log 2>&1

##### PARAMETERS TO BE FILLED #####

MAX_UPLOAD_BANDWIDTH=2250 #KiB/s Maximum WAN upload bandwidth the server network connection is capable of
DELUGE_MIN_SPEED=100 #KiB/s Deluge speed is never set below this value
BUFFER=250 #KiB/s Bring Deluge down by some additional buffer to prioritise streams (if there are any)

TAUTULLI_HOST=10.1.2.3
TAUTULLI_PORT=8181
TAUTULLI_API_KEY=a1b2c3d4a1b2c3d4a1b2c3d4a1b2c3d4
DELUGE_HOST=10.1.2.3
DELUGE_PORT=8112
DELUGE_COOKIE=/path/to/deluge.cookie #script relies on a valid cookie at this location, see deluge-cookie-update.sh
LOG_FILE=/path/to/bandwidth-manager.log
ERROR_NOTIFICATION_COMMAND="echo" #e.g. "gotify push -t 'Bandwidth Manager'"

##### SCRIPT START #####

# get WAN bandwidth used by streams from tautulli
WAN_BANDWIDTH=$(curl -s -X GET "http://${TAUTULLI_HOST}:${TAUTULLI_PORT}/api/v2?apikey=${TAUTULLI_API_KEY}&cmd=get_activity" | jq .response.data.wan_bandwidth) #kbps
WAN_BANDWIDTH=$(( $WAN_BANDWIDTH / 8 )) #KiB/s
[ $WAN_BANDWIDTH -eq 0 ] && BUFFER=0 #don't bring down Deluge by the buffer if there's no remote streams

# work out speed for deluge (subtract plex bandwidth from max specified bandwidth)
DELUGE_SPEED=$(($MAX_UPLOAD_BANDWIDTH - $WAN_BANDWIDTH - $BUFFER))
[ $DELUGE_SPEED -lt $DELUGE_MIN_SPEED ] && DELUGE_SPEED=$DELUGE_MIN_SPEED

# set speed in deluge
RETURN=$(curl -s -b "$DELUGE_COOKIE" --compressed -H "Content-Type: application/json" -d '{ "id":1, "method":"core.set_config", "params":[{"max_upload_speed":'$DELUGE_SPEED'}] }' "http://${DELUGE_HOST}:${DELUGE_PORT}/json" | jq -r .error)
[ "$RETURN" != null ] && { sh -c "$ERROR_NOTIFICATION_COMMAND 'Error communicating with Deluge'"; echo "${RETURN}"; exit; }

LOG_MESSAGE=$(echo "WAN Bandwidth is ${WAN_BANDWIDTH} KiB/s, Deluge set to ${DELUGE_SPEED} KiB/s")
[ $WAN_BANDWIDTH != 0 ] && [ "$LOG_MESSAGE" != "$(tail -1 "$LOG_FILE" | cut -d ' ' -f4-)" ] && echo "$LOG_MESSAGE" | ts