added Linux - Automatic Services Monitor script

Check_scripts/Linux - Automatic Services Monitor.sh

@@ -0,0 +1,69 @@
+#!/bin/bash
+# Usage: "Linux - Automatic Services Monitor.sh"
+# 
+# Description:
+#   This script is used from inside of Tactical RMM instances to monitor all automatic starting services. 
+#   This script should be deployed as a check script.
+#
+# Options:
+#
+# Author: D. de Kooker (info@dcomputers.nl)
+# Sources: n/a Created with the help of openai
+# Changelog :
+#   16-09-2023 - Initial script 
+
+# Array of services to exclude from monitoring
+# // EXCLUDE=("service_to_exclude1" "service_to_exclude2")
+EXCLUDE=("")
+
+# Function to check the status of a service and display its last error message
+check_service_status() {
+    service_name="$1"
+    systemctl is-active --quiet "$service_name"
+    if [ $? -eq 0 ]; then
+        return 0  # Service is running
+    else
+        return 1  # Service is not running
+    fi
+}
+
+# Function to get and display the last error message from the service's status log
+display_last_error_message() {
+    service_name="$1"
+    last_error_message=$(journalctl -n 1 -u "$service_name" --no-pager --quiet)
+    if [ -n "$last_error_message" ]; then
+        echo "Last error message for $service_name:"
+        echo "$last_error_message"
+    fi
+}
+
+# Array to store the names of stopped services
+STOPPED_SERVICES=()
+
+# Main loop to monitor all services except excluded ones
+# echo "Monitoring all services set to start automatically..."
+
+# Get the list of all enabled services
+enabled_services=$(systemctl list-units --type=service --state=active --no-legend | awk '{print $1}')
+
+for service in $enabled_services; do
+    # Check if the service is in the exclusion list
+    if [[ ! " ${EXCLUDE[@]} " =~ " $service " ]]; then
+        if ! check_service_status "$service"; then
+                STOPPED_SERVICES+=("$service")
+        fi
+    fi
+done
+
+if [ ${#STOPPED_SERVICES[@]} -eq 0 ]; then
+    echo "All services are running."
+    exit 0
+else
+    echo "Services in error/stopped state:"
+    for stopped_service in "${STOPPED_SERVICES[@]}"; do
+        echo "$stopped_service"
+        display_last_error_message "$stopped_service"
+        echo ""
+    done
+    exit 1
+fi