add monitoring

monitor/monitor.conf

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+# Configuration for SAP HANA Monitoring Script
+
+# --- Company Information ---
+# Used to identify which company the alert is for.
+COMPANY_NAME="Your Company Name"
+
+# --- Notification Settings ---
+# Your ntfy.sh topic URL
+NTFY_TOPIC_URL="https://ntfy.technopunk.space/sap"
+# Your ntfy.sh bearer token (if required)
+NTFY_TOKEN="your_ntfy_token_here"
+
+# --- HANA Connection Settings ---
+# Full path to the hdbsql executable
+HDBSQL_PATH="/usr/sap/hdbclient/hdbsql"
+# HANA user key for authentication
+HANA_USER_KEY="CRONKEY"
+# HANA Instance Number for sapcontrol
+HANA_INSTANCE_NR="00"
+
+# --- Monitoring Thresholds ---
+# Disk usage percentage that triggers an alert
+DISK_USAGE_THRESHOLD=80
+# Percentage of 'Truncated' log segments that triggers an alert
+TRUNCATED_PERCENTAGE_THRESHOLD=50
+# Percentage of 'Free' log segments below which an alert is triggered
+FREE_PERCENTAGE_THRESHOLD=25
+
+# --- Monitored Directories ---
+# List of directories to check for disk usage (space-separated)
+DIRECTORIES_TO_MONITOR=("/hana/log" "/hana/shared" "/hana/data" "/usr/sap")
+

monitor/monitor.sh

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+#!/bin/bash
+# Version: 1.0.0
+# =============================================================================
+# SAP HANA Monitoring Script
+#
+# Checks HANA processes, disk usage, and log segment state.
+# Sends ntfy.sh notifications if thresholds are exceeded.
+# =============================================================================
+
+# --- Lock File Implementation ---
+LOCK_FILE="/tmp/hana_monitor.lock"
+if [ -e "$LOCK_FILE" ]; then
+    echo "▶️  Script is already running. Exiting."
+    exit 1
+fi
+touch "$LOCK_FILE"
+# Ensure lock file is removed on script exit
+trap 'rm -f "$LOCK_FILE"' EXIT
+
+# --- Configuration and Setup ---
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" &>/dev/null && pwd)"
+CONFIG_FILE="${SCRIPT_DIR}/monitor_hana.conf"
+
+if [ ! -f "$CONFIG_FILE" ]; then
+    echo "❌ Error: Configuration file not found at ${CONFIG_FILE}"
+    rm -f "$LOCK_FILE"
+    exit 1
+fi
+source "$CONFIG_FILE"
+
+HOSTNAME=$(hostname)
+SQL_QUERY="SELECT b.host, b.service_name, a.state, count(*) FROM PUBLIC.M_LOG_SEGMENTS a JOIN PUBLIC.M_SERVICES b ON (a.host = b.host AND a.port = b.port) GROUP BY b.host, b.service_name, a.state;"
+
+send_notification() {
+    local title="$1"
+    local message="$2"
+    local full_message="[${COMPANY_NAME} | ${HOSTNAME}] ${message}"
+    curl -H "Authorization: Bearer ${NTFY_TOKEN}" -H "Title: ${title}" -d "${full_message}" "${NTFY_TOPIC_URL}"
+}
+
+# --- HANA Process Status ---
+echo "⚙️  Checking HANA process status..."
+non_green_processes=$(sapcontrol -nr "${HANA_INSTANCE_NR}" -function GetProcessList | tail -n +5 | grep -v 'GREEN')
+
+if [ -n "$non_green_processes" ]; then
+    echo "🚨 Alert: One or more HANA processes are not running!"
+    echo "$non_green_processes"
+    send_notification "HANA Process Alert" "🚨 Critical: One or more HANA processes are not GREEN. Problem processes: ${non_green_processes}"
+    exit 1 # Exit early as other checks might fail
+fi
+echo "✅ Success! All HANA processes are GREEN."
+
+# --- Disk Space Monitoring ---
+echo "ℹ️  Checking disk usage..."
+for dir in "${DIRECTORIES_TO_MONITOR[@]}"; do
+    if [ ! -d "$dir" ]; then
+        echo "⚠️  Warning: Directory '$dir' not found. Skipping."
+        continue
+    fi
+    usage=$(df -h "$dir" | awk 'NR==2 {print $5}' | sed 's/%//')
+    echo "    - ${dir} is at ${usage}%"
+    if (( $(echo "$usage > $DISK_USAGE_THRESHOLD" | bc -l) )); then
+        echo "🚨 Alert: ${dir} usage is at ${usage}% which is above the ${DISK_USAGE_THRESHOLD}% threshold."
+        send_notification "HANA Disk Alert" "🚨 Critical: Disk usage for ${dir} is at ${usage}%."
+    fi
+done
+
+# --- HANA Log Segment Monitoring ---
+echo "⚙️  Executing HANA SQL query..."
+if [ ! -x "$HDBSQL_PATH" ]; then
+    echo "❌ Error: hdbsql not found or not executable at ${HDBSQL_PATH}"
+    send_notification "HANA Monitor Error" "❌ Error: hdbsql not found or not executable at ${HDBSQL_PATH}"
+    exit 1
+fi
+readarray -t sql_output < <("$HDBSQL_PATH" -U "$HANA_USER_KEY" -c ";" "$SQL_QUERY" 2>&1)
+if [ $? -ne 0 ]; then
+    echo "❌ Failure! The hdbsql command failed. Please check logs."
+    error_message=$(printf '%s\n' "${sql_output[@]}")
+    send_notification "HANA Monitor Error" "❌ Failure! The hdbsql command failed. Details: ${error_message}"
+    exit 1
+fi
+
+total_segments=0
+truncated_segments=0
+free_segments=0
+for line in "${sql_output[@]}"; do
+    if [[ -z "$line" || "$line" == *"STATE"* ]]; then continue; fi
+    cleaned_line=$(echo "$line" | tr -d '"')
+    state=$(echo "$cleaned_line" | awk -F',' '{print $3}')
+    count=$(echo "$cleaned_line" | awk -F',' '{print $4}')
+    total_segments=$((total_segments + count))
+    if [[ "$state" == "Truncated" ]]; then
+        truncated_segments=$((truncated_segments + count))
+    elif [[ "$state" == "Free" ]]; then
+        free_segments=$((free_segments + count))
+    fi
+done
+
+echo "ℹ️  Total Segments: ${total_segments}"
+echo "ℹ️  Truncated Segments: ${truncated_segments}"
+echo "ℹ️  Free Segments: ${free_segments}"
+
+if [ $total_segments -eq 0 ]; then
+    echo "⚠️  Warning: No log segments found. Skipping percentage checks."
+    exit 0
+fi
+
+truncated_percentage=$((truncated_segments * 100 / total_segments))
+if (( $(echo "$truncated_percentage > $TRUNCATED_PERCENTAGE_THRESHOLD" | bc -l) )); then
+    echo "🚨 Alert: ${truncated_percentage}% of log segments are 'Truncated'."
+    send_notification "HANA Log Segment Alert" "🚨 Alert: ${truncated_percentage}% of HANA log segments are in 'Truncated' state."
+fi
+
+free_percentage=$((free_segments * 100 / total_segments))
+if (( $(echo "$free_percentage < $FREE_PERCENTAGE_THRESHOLD" | bc -l) )); then
+    echo "🚨 Alert: Only ${free_percentage}% of log segments are 'Free'."
+    send_notification "HANA Log Segment Alert" "🚨 Alert: Only ${free_percentage}% of HANA log segments are in 'Free' state."
+fi
+
+echo "✅ Success! HANA monitoring check complete."
+