feat: complete SRE exam deliverables for Ghaymah & Qabilah platform submission

q1-deploy-monitor/health-check.sh

@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+# ==============================================================================
+# Ghaymah Cloud SRE — Q1 Automated Health Check Monitoring Script (Bash)
+# Performs HTTP /healthz checks every 30 seconds, logs latency & alerts
+# ==============================================================================
+
+TARGET_URL="${MONITOR_TARGET_URL:-http://localhost:8000/healthz}"
+CHECK_INTERVAL=30
+LOG_FILE="./health_monitor.log"
+
+echo "⚡ Starting Ghaymah SRE Health Check Script"
+echo "🎯 Target URL: $TARGET_URL"
+echo "⏱️ Check Interval: ${CHECK_INTERVAL}s"
+echo "--------------------------------------------------------"
+
+while true; do
+    TIMESTAMP=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
+    
+    # Execute cURL measuring total time in seconds & status code
+    START_TIME=$(date +%s%N)
+    HTTP_RESPONSE=$(curl -s -o /dev/null -w "%{http_code}" --max-time 5 "$TARGET_URL")
+    END_TIME=$(date +%s%N)
+    
+    # Calculate round trip time in milliseconds
+    LATENCY_MS=$(( (END_TIME - START_TIME) / 1000000 ))
+
+    if [ "$HTTP_RESPONSE" -eq 200 ]; then
+        STATUS_STR="[SUCCESS] 🟢 Status: HTTP 200 OK | Latency: ${LATENCY_MS}ms"
+        echo "[$TIMESTAMP] $STATUS_STR"
+        echo "[$TIMESTAMP] SUCCESS status=200 latency=${LATENCY_MS}ms" >> "$LOG_FILE"
+    else
+        STATUS_STR="[ALERT] 🚨 CRITICAL: Service Unhealthy! Code: ${HTTP_RESPONSE} | Latency: ${LATENCY_MS}ms"
+        echo "[$TIMESTAMP] $STATUS_STR"
+        echo "[$TIMESTAMP] ALERT status=${HTTP_RESPONSE} latency=${LATENCY_MS}ms" >> "$LOG_FILE"
+        
+        # Simulated PagerDuty / Ghaymah Alert trigger
+        echo "🚨 [PAGERDUTY ALERT] Service at $TARGET_URL responded with HTTP $HTTP_RESPONSE at $TIMESTAMP"
+    fi
+
+    sleep $CHECK_INTERVAL
+done