data/scripts/watchdog-monitor aktualisiert

data/scripts/watchdog-monitor

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+#!/bin/bash
+
+# Log file
+log_file="/var/log/watchdog.log"
+
+# Configuration file
+config_file="/etc/watchdog.conf"
+
+# Function to log messages with timestamp
+log() {
+    echo "$(date '+%Y-%m-%d %H:%M:%S') - $1" >> "$log_file"
+}
+
+# Function to update watchdog configuration
+update_watchdog_config() {
+    # Extract watchdog IP addresses
+    watchdog=$(sudo cat /var/lib/dhcp/* | grep -a "option watchdog" | tail -1 | \
+    awk '{for (i=3; i<=NF; i++) printf "%s ", $i}' | tr -d '";')
+    
+    IFS=', ' read -r -a ip_array <<< "$watchdog"  # Split IPs by comma or space
+
+    # Backup current configuration
+    sudo cp "$config_file" "$config_file.bak"
+    log "Backup of $config_file created successfully."
+
+    # Write static configuration to file
+    {
+        echo "realtime = yes"
+        echo "priority = 1"
+        echo "interface = eth0"
+        echo "interval = 58"
+        echo "ping-count = 1"
+    } | sudo tee "$config_file" > /dev/null
+    log "Static configuration written to $config_file."
+
+    if [ ${#ip_array[@]} -eq 0 ]; then
+        log "No IP addresses found. Watchdog configuration cleared."
+        return 1  # No IP addresses to configure
+    else
+        # Append IPs to config
+        for ip in "${ip_array[@]}"; do
+            echo "ping = $ip" | sudo tee -a "$config_file" > /dev/null
+        done
+        log "Configured watchdog to ping: ${ip_array[*]}"
+
+        # Attempt to restart watchdog service
+        if ! sudo systemctl restart watchdog; then
+            log "Failed to restart watchdog service. Attempting to stop and start."
+
+            # Fallback: stop then start the service
+            sudo systemctl stop watchdog
+            if sudo systemctl start watchdog; then
+                log "Watchdog service started successfully after stop."
+            else
+                log "Failed to start watchdog service after stop."
+                return 1
+            fi
+        else
+            log "Watchdog service restarted successfully."
+        fi
+
+        # Stop watchdog-monitor service if restart/start was successful
+        if sudo systemctl stop watchdog-monitor; then
+            log "watchdog-monitor service stopped successfully."
+        else
+            log "Failed to stop watchdog-monitor service."
+        fi
+
+        return 0  # Successful restart/start
+    fi
+}
+
+# Loop parameters
+interval=30  # Interval to wait between checks
+start_time=$(date +%s)
+end_time=$((start_time + 300))  # 5 minutes in seconds
+
+# Main loop
+while true; do
+    if ! update_watchdog_config; then
+        log "IP addresses found and watchdog restarted. Exiting loop."
+        break
+    else
+        log "No IP addresses found or restart failed. Waiting for $interval seconds before checking again..."
+    fi
+
+    # Check if 5 minutes have passed
+    if [ "$(date +%s)" -ge "$end_time" ]; then
+        log "5 minutes have passed. Stopping the watchdog service."
+        sudo systemctl stop watchdog
+        break
+    fi
+
+    log "Waiting for $interval seconds before checking for IP addresses again..."
+    sleep $interval
+done
+
+# Version 1.5:
+# Created 2024 by Tim Eertmoed @ WiS IT-Solutions GmbH, Germany to work on Raspian as custom PXE init script.