122 lines
4.8 KiB
Bash
122 lines
4.8 KiB
Bash
#!/bin/bash
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# Version: 1.0.2
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# =============================================================================
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# SAP HANA Monitoring Script
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#
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# Checks HANA processes, disk usage, and log segment state.
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# Sends ntfy.sh notifications if thresholds are exceeded.
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# =============================================================================
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# --- Lock File Implementation ---
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LOCK_FILE="/tmp/hana_monitor.lock"
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if [ -e "$LOCK_FILE" ]; then
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echo "▶️ Script is already running. Exiting."
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exit 1
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fi
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touch "$LOCK_FILE"
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# Ensure lock file is removed on script exit
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trap 'rm -f "$LOCK_FILE"' EXIT
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# --- Configuration and Setup ---
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" &>/dev/null && pwd)"
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CONFIG_FILE="${SCRIPT_DIR}/monitor.conf"
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if [ ! -f "$CONFIG_FILE" ]; then
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echo "❌ Error: Configuration file not found at ${CONFIG_FILE}"
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rm -f "$LOCK_FILE"
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exit 1
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fi
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source "$CONFIG_FILE"
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HOSTNAME=$(hostname)
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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;"
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send_notification() {
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local title="$1"
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local message="$2"
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local full_message="[${COMPANY_NAME} | ${HOSTNAME}] ${message}"
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curl -H "Authorization: Bearer ${NTFY_TOKEN}" -H "Title: ${title}" -d "${full_message}" "${NTFY_TOPIC_URL}"
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}
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# --- HANA Process Status ---
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echo "⚙️ Checking HANA process status..."
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non_green_processes=$(sapcontrol -nr "${HANA_INSTANCE_NR}" -function GetProcessList | tail -n +6 | grep -v 'GREEN')
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if [ -n "$non_green_processes" ]; then
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echo "🚨 Alert: One or more HANA processes are not running!"
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echo "$non_green_processes"
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send_notification "HANA Process Alert" "🚨 Critical: One or more HANA processes are not GREEN. Problem processes: ${non_green_processes}"
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exit 1 # Exit early as other checks might fail
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fi
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echo "✅ Success! All HANA processes are GREEN."
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# --- Disk Space Monitoring ---
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echo "ℹ️ Checking disk usage..."
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for dir in "${DIRECTORIES_TO_MONITOR[@]}"; do
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if [ ! -d "$dir" ]; then
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echo "⚠️ Warning: Directory '$dir' not found. Skipping."
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continue
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fi
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usage=$(df -h "$dir" | awk 'NR==2 {print $5}' | sed 's/%//')
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echo " - ${dir} is at ${usage}%"
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if (( $(echo "$usage > $DISK_USAGE_THRESHOLD" | bc -l) )); then
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echo "🚨 Alert: ${dir} usage is at ${usage}% which is above the ${DISK_USAGE_THRESHOLD}% threshold."
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send_notification "HANA Disk Alert" "🚨 Critical: Disk usage for ${dir} is at ${usage}%."
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fi
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done
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# --- HANA Log Segment Monitoring ---
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echo "⚙️ Executing HANA SQL query..."
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if [ ! -x "$HDBSQL_PATH" ]; then
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echo "❌ Error: hdbsql not found or not executable at ${HDBSQL_PATH}"
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send_notification "HANA Monitor Error" "❌ Error: hdbsql not found or not executable at ${HDBSQL_PATH}"
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exit 1
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fi
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readarray -t sql_output < <("$HDBSQL_PATH" -U "$HANA_USER_KEY" -c ";" "$SQL_QUERY" 2>&1)
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if [ $? -ne 0 ]; then
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echo "❌ Failure! The hdbsql command failed. Please check logs."
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error_message=$(printf '%s\n' "${sql_output[@]}")
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send_notification "HANA Monitor Error" "❌ Failure! The hdbsql command failed. Details: ${error_message}"
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exit 1
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fi
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total_segments=0
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truncated_segments=0
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free_segments=0
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for line in "${sql_output[@]}"; do
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if [[ -z "$line" || "$line" == *"STATE"* ]]; then continue; fi
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cleaned_line=$(echo "$line" | tr -d '"')
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state=$(echo "$cleaned_line" | awk -F',' '{print $3}')
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count=$(echo "$cleaned_line" | awk -F',' '{print $4}')
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total_segments=$((total_segments + count))
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if [[ "$state" == "Truncated" ]]; then
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truncated_segments=$((truncated_segments + count))
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elif [[ "$state" == "Free" ]]; then
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free_segments=$((free_segments + count))
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fi
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done
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echo "ℹ️ Total Segments: ${total_segments}"
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echo "ℹ️ Truncated Segments: ${truncated_segments}"
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echo "ℹ️ Free Segments: ${free_segments}"
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if [ $total_segments -eq 0 ]; then
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echo "⚠️ Warning: No log segments found. Skipping percentage checks."
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exit 0
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fi
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truncated_percentage=$((truncated_segments * 100 / total_segments))
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if (( $(echo "$truncated_percentage > $TRUNCATED_PERCENTAGE_THRESHOLD" | bc -l) )); then
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echo "🚨 Alert: ${truncated_percentage}% of log segments are 'Truncated'."
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send_notification "HANA Log Segment Alert" "🚨 Alert: ${truncated_percentage}% of HANA log segments are in 'Truncated' state."
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fi
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free_percentage=$((free_segments * 100 / total_segments))
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if (( $(echo "$free_percentage < $FREE_PERCENTAGE_THRESHOLD" | bc -l) )); then
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echo "🚨 Alert: Only ${free_percentage}% of log segments are 'Free'."
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send_notification "HANA Log Segment Alert" "🚨 Alert: Only ${free_percentage}% of HANA log segments are in 'Free' state."
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fi
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echo "✅ Success! HANA monitoring check complete."
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