Use Uptime Kuma for disk space monitoring

diskspace-uptime.sh

#!/bin/bash

BASE_URL="https://uptime.bouni.de/api/push/"

disks=("/dev/sda1")
alerts=(85)
urls=("pCDwxLPOoI")

check () {
  DISK=$1
  ALERT_LEVEL=$2
  URL_HASH=$3

  disk_usage=`/usr/bin/df -h $DISK | /usr/bin/tail -n +2 | /usr/bin/awk 'END {print $5}' | /usr/bin/tr -d "%"`
  # Get disk space in GB
  disk_space=`/usr/bin/df -h $DISK | /usr/bin/tail -n +2 | /usr/bin/awk 'END {print $2}'`
  # get used disk space in GB
  used_space=`/usr/bin/df -h $DISK | /usr/bin/tail -n +2 | /usr/bin/awk 'END {print $3}'`
  # get free disk space in GB
  free_space=`/usr/bin/df -h $DISK | /usr/bin/tail -n +2 | /usr/bin/awk 'END {print $4}'`
  # get mount point
  mount_point=`/usr/bin/df -h $DISK | /usr/bin/tail -n +2 | /usr/bin/awk 'END {print $6}'`

  # Check if disk usage is higher than 85%
  if [ $disk_usage -gt $ALERT_LEVEL ]; then
    # Send push notification
    /usr/bin/curl -k --get \
      --data-urlencode "msg=Disk usage on ${mount_point} is high: ${disk_usage}% (${free_space}/${used_space}/${disk_space})" \
      --data-urlencode "status=down" \
      "${BASE_URL}${URL_HASH}"
  else
    /usr/bin/curl -k --get \
      --data-urlencode "msg=Disk usage on ${mount_point} is OK: ${disk_usage}% (${free_space}/${used_space}/${disk_space})" \
      --data-urlencode "status=up" \
      "${BASE_URL}${URL_HASH}"
  fi
}

for (( i=0; i<${#disks[@]}; i++ )); do
    check ${disks[$i]} ${alerts[$i]} ${urls[$i]}
done

diskspace.service

[Unit]
Description=Sends disk space stats to Uptime Kuma

[Service]
Type=oneshot
ExecStart=/opt/scripts/diskspace.sh

diskspace.timer

[Unit]
Description=Sends disk space stats to Uptime Kuma

[Timer]
OnCalendar=*:0/10

[Install]
WantedBy=timers.target