init stacks

14_infra-assistant/api/analysis/cpu.py

@@ -0,0 +1,57 @@
+from fastapi import APIRouter
+from api.connectors.prometheus import query_scalar
+
+router = APIRouter()
+
+CPU_AVG_QUERY = """
+avg_over_time(
+  100 - (
+    avg by (instance) (
+      rate(node_cpu_seconds_total{mode="idle"}[1m])
+    ) * 100
+  )
+[20m])
+"""
+
+CPU_SLOPE_QUERY = """
+deriv(
+  100 - (
+    avg by (instance) (
+      rate(node_cpu_seconds_total{mode="idle"}[1m])
+    ) * 100
+  )
+[20m])
+"""
+
+def analyze_cpu(cpu_avg: float, cpu_slope: float) -> dict:
+    if cpu_avg > 90:
+        status = "RISK_CPU"
+        reason = "CPU très élevé"
+    elif cpu_avg > 80:
+        status = "WARN_CPU"
+        reason = "CPU élevé"
+    else:
+        status = "OK"
+        reason = "CPU normal"
+
+    trend = "increasing" if cpu_slope > 0.5 else "stable"
+
+    return {
+        "status": status,
+        "avg": round(cpu_avg, 2),
+        "trend": trend,
+        "reason": reason
+    }
+
+@router.get("/cpu")
+def cpu_analysis():
+    avg = query_scalar(CPU_AVG_QUERY)
+    slope = query_scalar(CPU_SLOPE_QUERY)
+
+    if avg is None or slope is None:
+        return {
+            "status": "UNKNOWN",
+            "reason": "Prometheus data unavailable"
+        }
+
+    return analyze_cpu(avg, slope)