Stop services if drive space is extremely low

rootfs/standard/usr/bin/drive_check.sh

@@ -15,6 +15,16 @@ echo "Found Drive: $drive"
 lsblk $drive &> /dev/null
 while [ $? -eq 0 ]; do
     #echo "$drive still found..."
+
+    # Check drive usage
+    usage=$(df -h /mnt/hdd | grep /dev | awk '{print $5}' | cut -d'%' -f1)
+    echo "Usage $usage"
+    if [ $usage -ge 99 ]; then
+        # Usage is 99%+, reboot to get into drive_full state with services stopped
+        /usr/bin/mynode-reboot
+    fi
+
+    # Wait, check again in one minute
     sleep 60
     lsblk $drive &> /dev/null
 done

rootfs/standard/usr/bin/mynode_startup.sh

@@ -116,6 +116,15 @@ if [ -f /home/bitcoin/reset_docker ]; then
 fi
 
 
+# Check drive usage
+usage=$(df -h /mnt/hdd | grep /dev | awk '{print $5}' | cut -d'%' -f1)
+while [ $usage -ge 98 ]; do
+    echo "drive_full" > $MYNODE_STATUS_FILE
+    sleep 10s
+    usage=$(df -h /mnt/hdd | grep /dev | awk '{print $5}' | cut -d'%' -f1)
+done
+
+
 # Setup Drive
 mkdir -p /mnt/hdd/mynode
 mkdir -p /mnt/hdd/mynode/settings

rootfs/standard/var/www/mynode/device_info.py

@@ -389,6 +389,7 @@ STATE_DRIVE_MISSING =         "drive_missing"
 STATE_DRIVE_CONFIRM_FORMAT =  "drive_format_confirm"
 STATE_DRIVE_FORMATTING =      "drive_formatting"
 STATE_DRIVE_MOUNTED =         "drive_mounted"
+STATE_DRIVE_FULL =            "drive_full"
 STATE_GEN_DHPARAM =           "gen_dhparam"
 STATE_QUICKSYNC_DOWNLOAD =    "quicksync_download"
 STATE_QUICKSYNC_COPY =        "quicksync_copy"

rootfs/standard/var/www/mynode/mynode.py

@@ -212,6 +212,20 @@ def index():
             "ui_settings": read_ui_settings()
         }
         return render_template('state.html', **templateData)
+    elif status == STATE_DRIVE_FULL:
+        message  = "Your drive is full!<br/><br/>"
+        message += "<p style='font-size: 16px; width: 800px; margin: auto;'>"
+        message += "To prevent corrupting any data, your device has stopped running most apps until more free space is available. "
+        message += "Please free up some space or attach a larger drive.<br/><br/>"
+        message += "If enabled, disabling QuickSync can save a large amount of space."
+        message += "</p>"
+        templateData = {
+            "title": "myNode Drive Full",
+            "header_text": "Drive Full",
+            "subheader_text": Markup(message),
+            "ui_settings": read_ui_settings()
+        }
+        return render_template('state.html', **templateData)
     elif status == STATE_GEN_DHPARAM:
         templateData = {
             "title": "myNode Generating Data",