Initial commit: homelab configuration and documentation

proxmox/network_check.sh

@@ -0,0 +1,64 @@
+#!/bin/bash
+
+# A script to check for internet connectivity and reset the USB network adapter or reboot if the connection is down.
+
+# The IP address of your local gateway (router).
+GATEWAY_IP="192.168.1.1"
+
+# The IP address to ping to check for an external internet connection.
+PING_IP="8.8.8.8"
+
+# The number of pings to send.
+PING_COUNT=1
+
+# The USB bus and device number of the network adapter.
+# Use 'lsusb' to find these values for your specific device.
+USB_BUS="002"
+USB_DEV="003"
+
+# The path to the USB device.
+USB_DEVICE_PATH="/dev/bus/usb/$USB_BUS/$USB_DEV"
+
+# Log file
+LOG_FILE="/var/log/network_check.log"
+
+# Function to log messages
+log() {
+    echo "$(date '+%Y-%m-%d %H:%M:%S') - $1" >> "$LOG_FILE"
+}
+
+# Check if the script is running as root.
+if [ "$(id -u)" -ne 0 ]; then
+    log "This script must be run as root."
+    exit 1
+fi
+
+# 1. Check for local network connectivity by pinging the gateway.
+if ! ping -c "$PING_COUNT" "$GATEWAY_IP" > /dev/null 2>&1; then
+    log "Local network connection is down (cannot ping gateway $GATEWAY_IP). This indicates a problem with the host's network adapter."
+    log "Attempting to reset the USB adapter."
+
+    # Attempt to reset the USB device.
+    if [ -e "$USB_DEVICE_PATH" ]; then
+        /usr/bin/usbreset "$USB_DEVICE_PATH"
+        sleep 10 # Wait for the device to reinitialize.
+
+        # Check the connection again.
+        if ! ping -c "$PING_COUNT" "$GATEWAY_IP" > /dev/null 2>&1; then
+            log "USB reset failed to restore the local connection. Rebooting the system."
+            /sbin/reboot
+        else
+            log "USB reset successful. Local network connection is back up."
+        fi
+    else
+        log "USB device not found at $USB_DEVICE_PATH. Rebooting the system."
+        /sbin/reboot
+    fi
+else
+    # 2. If the local network is up, check for external internet connectivity.
+    if ! ping -c "$PING_COUNT" "$PING_IP" > /dev/null 2>&1; then
+        log "Local network is up, but internet connection is down (cannot ping $PING_IP). This is likely a router or ISP issue. No action taken."
+    else
+        log "Network connection is up."
+    fi
+fi