[BugFix] fix work metrics not returned by metrics api (#4912)

* [BugFix] fix work metrics not returned by metrics api

* [fix] fix conflict

* [fix] fix ci

fastdeploy/__init__.py

@@ -17,11 +17,20 @@
 import os
 import subprocess
 import sys
+import uuid
 
 # suppress warning log from paddlepaddle
 os.environ["GLOG_minloglevel"] = "2"
 # suppress log from aistudio
 os.environ["AISTUDIO_LOG"] = "critical"
+# set prometheus dir
+if os.getenv("PROMETHEUS_MULTIPROC_DIR", "") == "":
+    prom_dir = f"/tmp/fd_prom_{str(uuid.uuid4())}"
+    os.environ["PROMETHEUS_MULTIPROC_DIR"] = prom_dir
+    if os.path.exists(prom_dir):
+        os.rmdir(prom_dir)
+    os.mkdir(prom_dir)
+
 import typing
 
 from paddleformers.utils.log import logger as pf_logger