diff --git a/shards/mishards/.env.example b/shards/mishards/.env.example
index 0a23c0cf56..8c8e696c31 100644
--- a/shards/mishards/.env.example
+++ b/shards/mishards/.env.example
@@ -4,17 +4,6 @@ WOSERVER=tcp://127.0.0.1:19530
 SERVER_PORT=19532
 SERVER_TEST_PORT=19888
 
-SD_PROVIDER=Static
-
-SD_NAMESPACE=xp
-SD_IN_CLUSTER=False
-SD_POLL_INTERVAL=5
-SD_ROSERVER_POD_PATT=.*-ro-servers-.*
-SD_LABEL_SELECTOR=tier=ro-servers
-
-SD_STATIC_HOSTS=127.0.0.1
-SD_STATIC_PORT=19530
-
 #SQLALCHEMY_DATABASE_URI=mysql+pymysql://root:root@127.0.0.1:3306/milvus?charset=utf8mb4
 SQLALCHEMY_DATABASE_URI=sqlite:////tmp/milvus/db/meta.sqlite?check_same_thread=False
 SQL_ECHO=True
@@ -31,3 +20,18 @@ TRACING_SAMPLER_PARAM=1
 TRACING_LOG_PAYLOAD=True
 #TRACING_SAMPLER_TYPE=probabilistic
 #TRACING_SAMPLER_PARAM=0.5
+
+TRACER_PLUGIN_PATH=/tmp/plugins
+# TRACER_CLASS_NAME=
+
+#DISCOVERY_PLUGIN_PATH=
+#DISCOVERY_CLASS_NAME=kubernetes
+
+DISCOVERY_STATIC_HOSTS=127.0.0.1
+DISCOVERY_STATIC_PORT=19530
+
+DISCOVERY_KUBERNETES_NAMESPACE=xp
+DISCOVERY_KUBERNETES_POD_PATT=.*-ro-servers-.*
+DISCOVERY_KUBERNETES_LABEL_SELECTOR=tier=ro-servers
+DISCOVERY_KUBERNETES_POLL_INTERVAL=5
+DISCOVERY_KUBERNETES_IN_CLUSTER=False
diff --git a/shards/mishards/__init__.py b/shards/mishards/__init__.py
index 96463caa93..b4c51cc4f5 100644
--- a/shards/mishards/__init__.py
+++ b/shards/mishards/__init__.py
@@ -22,7 +22,7 @@ def create_app(testing_config=None):
 
     from mishards.grpc_utils import GrpcSpanDecorator
     from tracer.factory import TracerFactory
-    tracer = TracerFactory(config.TRACING_PLUGIN_PATH).create(config.TRACING_TYPE,
+    tracer = TracerFactory(config.TRACER_PLUGIN_PATH).create(config.TRACER_CLASS_NAME,
                                                               plugin_config=settings.TracingConfig,
                                                               span_decorator=GrpcSpanDecorator())
 
diff --git a/shards/mishards/settings.py b/shards/mishards/settings.py
index 6935405091..09b7b0713f 100644
--- a/shards/mishards/settings.py
+++ b/shards/mishards/settings.py
@@ -61,8 +61,8 @@ class TracingConfig:
 class DefaultConfig:
     SQLALCHEMY_DATABASE_URI = env.str('SQLALCHEMY_DATABASE_URI')
     SQL_ECHO = env.bool('SQL_ECHO', False)
-    TRACING_PLUGIN_PATH = env.str('TRACING_PLUGIN_PATH', '')
-    TRACING_TYPE = env.str('TRACING_TYPE', '')
+    TRACER_PLUGIN_PATH = env.str('TRACER_PLUGIN_PATH', '')
+    TRACER_CLASS_NAME = env.str('TRACER_CLASS_NAME', '')
     ROUTER_PLUGIN_PATH = env.str('ROUTER_PLUGIN_PATH', '')
     ROUTER_CLASS_NAME = env.str('ROUTER_CLASS_NAME', 'FileBasedHashRingRouter')
     DISCOVERY_PLUGIN_PATH = env.str('DISCOVERY_PLUGIN_PATH', '')