Telemetry

orchestrateur/lib/systemd_logs.py

@@ -0,0 +1,61 @@
+from datetime import datetime
+import asyncio
+import json
+
+async def get_systemd_logs(lines: int = 200, service_name: str = "smartwave") -> list[dict]:
+    """
+    Asynchronously fetches the last N log entries from a systemd service 
+    using native asyncio subprocess execution.
+    """
+    cmd = (
+        "journalctl",
+        "-u", service_name,
+        "-n", str(lines),
+        "-o", "json",
+        "--no-pager"
+    )
+    
+    try:
+        # Create non-blocking child process
+        proc = await asyncio.create_subprocess_exec(
+            *cmd,
+            stdout=asyncio.subprocess.PIPE,
+            stderr=asyncio.subprocess.PIPE
+        )
+        
+        # Await completion and read output non-blockingly
+        stdout_bytes, stderr_bytes = await proc.communicate()
+        
+        if proc.returncode != 0:
+            print(f"[Logs] journalctl error (code {proc.returncode}): {stderr_bytes.decode('utf-8', errors='replace')}")
+            return []
+            
+        structured_logs = []
+        stdout_text = stdout_bytes.decode("utf-8", errors="replace")
+        
+        for line in stdout_text.strip().split("\n"):
+            if not line:
+                continue
+            try:
+                entry = json.loads(line)
+                
+                raw_ts = entry.get("__REALTIME_TIMESTAMP")
+                timestamp_iso = None
+                if raw_ts:
+                    timestamp_iso = datetime.fromtimestamp(int(raw_ts) / 1_000_000).isoformat()
+                
+                structured_logs.append({
+                    "timestamp": timestamp_iso,
+                    "timestamp_us": int(raw_ts) if raw_ts else None,
+                    "message": entry.get("MESSAGE", ""),
+                    "priority": entry.get("PRIORITY"),
+                    "pid": entry.get("_PID"),
+                })
+            except (json.JSONDecodeError, ValueError):
+                continue
+                
+        return structured_logs
+
+    except Exception as e:
+        print(f"[Logs] Failed to read systemd logs for '{service_name}': {e}")
+        return []