diff --git a/.ci/docker-compose-file/conf.cluster.env b/.ci/docker-compose-file/conf.cluster.env
new file mode 100644
index 000000000..16fb4733e
--- /dev/null
+++ b/.ci/docker-compose-file/conf.cluster.env
@@ -0,0 +1,6 @@
+EMQX_NAME=emqx
+EMQX_CLUSTER__DISCOVERY=static
+EMQX_CLUSTER__STATIC__SEEDS="emqx@node1.emqx.io, emqx@node2.emqx.io"
+EMQX_LISTENER__TCP__EXTERNAL__PROXY_PROTOCOL=on
+EMQX_LISTENER__WS__EXTERNAL__PROXY_PROTOCOL=on
+EMQX_LOG__LEVEL=debug
diff --git a/.ci/docker-compose-file/docker-compose-emqx-cluster.yaml b/.ci/docker-compose-file/docker-compose-emqx-cluster.yaml
index 39e231367..18e1bb6cc 100644
--- a/.ci/docker-compose-file/docker-compose-emqx-cluster.yaml
+++ b/.ci/docker-compose-file/docker-compose-emqx-cluster.yaml
@@ -10,7 +10,8 @@ services:
     volumes:
       - ./haproxy/haproxy.cfg:/usr/local/etc/haproxy/haproxy.cfg
       - ../../etc/certs:/usr/local/etc/haproxy/certs
-#   ports:
+    ports:
+      - "18083:18083"
 #     - "1883:1883"
 #     - "8883:8883"
 #     - "8083:8083"
@@ -28,16 +29,10 @@ services:
   emqx1:
     container_name: node1.emqx.io
     image: $TARGET:$EMQX_TAG
+    env_file:
+      - conf.cluster.env
     environment:
-    - "EMQX_NAME=emqx"
-    - "EMQX_HOST=node1.emqx.io"
-    - "EMQX_CLUSTER__DISCOVERY=static"
-    - "EMQX_CLUSTER__STATIC__SEEDS=emqx@node1.emqx.io, emqx@node2.emqx.io"
-    - "EMQX_LISTENER__TCP__EXTERNAL__PROXY_PROTOCOL=on"
-    - "EMQX_LISTENER__WS__EXTERNAL__PROXY_PROTOCOL=on"
-    - "EMQX_ZONE__EXTERNAL__RETRY_INTERVAL=2s"
-    - "EMQX_MQTT__MAX_TOPIC_ALIAS=10"
-    - "EMQX_LOG__LEVEL=debug"
+      - "EMQX_HOST=node1.emqx.io"
     command:
         - /bin/sh
         - -c
@@ -58,16 +53,10 @@ services:
   emqx2:
     container_name: node2.emqx.io
     image: $TARGET:$EMQX_TAG
+    env_file:
+      - conf.cluster.env
     environment:
-    - "EMQX_NAME=emqx"
-    - "EMQX_HOST=node2.emqx.io"
-    - "EMQX_CLUSTER__DISCOVERY=static"
-    - "EMQX_CLUSTER__STATIC__SEEDS=emqx@node1.emqx.io, emqx@node2.emqx.io"
-    - "EMQX_LISTENER__TCP__EXTERNAL__PROXY_PROTOCOL=on"
-    - "EMQX_LISTENER__WS__EXTERNAL__PROXY_PROTOCOL=on"
-    - "EMQX_ZONE__EXTERNAL__RETRY_INTERVAL=2s"
-    - "EMQX_MQTT__MAX_TOPIC_ALIAS=10"
-    - "EMQX_LOG__LEVEL=debug"
+      - "EMQX_HOST=node2.emqx.io"
     command:
       - /bin/sh
       - -c
diff --git a/.ci/docker-compose-file/haproxy/haproxy.cfg b/.ci/docker-compose-file/haproxy/haproxy.cfg
index 217fb3048..73c219d55 100644
--- a/.ci/docker-compose-file/haproxy/haproxy.cfg
+++ b/.ci/docker-compose-file/haproxy/haproxy.cfg
@@ -2,7 +2,7 @@
 ## global 2021/04/05
 ##----------------------------------------------------------------
 global
-    log 127.0.0.1:514 local0 notice
+    log stdout format raw daemon debug
     # Replace 1024000 with deployment connections
     maxconn 1000
     nbproc 1
diff --git a/.github/workflows/run_fvt_tests.yaml b/.github/workflows/run_fvt_tests.yaml
index 0536fe552..be8454c22 100644
--- a/.github/workflows/run_fvt_tests.yaml
+++ b/.github/workflows/run_fvt_tests.yaml
@@ -35,6 +35,9 @@ jobs:
           timeout-minutes: 5
           run: |
             set -e -u -x
+            echo "CUTTLEFISH_ENV_OVERRIDE_PREFIX=EMQX_" >> .ci/docker-compose-file/conf.cluster.env
+            echo "EMQX_ZONE__EXTERNAL__RETRY_INTERVAL=2s" >> .ci/docker-compose-file/conf.cluster.env
+            echo "EMQX_MQTT__MAX_TOPIC_ALIAS=10" >> .ci/docker-compose-file/conf.cluster.env
             docker-compose \
                 -f .ci/docker-compose-file/docker-compose-emqx-cluster.yaml \
                 -f .ci/docker-compose-file/docker-compose-python.yaml \