SeleniumHQ · VietND96 · Feb 1, 2025 · Jan 31, 2025
diff --git a/ENV_VARIABLES.md b/ENV_VARIABLES.md
@@ -125,7 +125,6 @@
 | SE_NODE_BROWSER_NAME |  |  |  |
 | SE_NODE_CONTAINER_NAME |  |  |  |
 | SE_NODE_HOST |  |  |  |
-| SE_NODE_MAX_CONCURRENCY |  | When node is handled both browser and relay, SE_NODE_MAX_CONCURRENCY is used to configure max concurrency based on sum of them |  |
 | SE_NODE_RELAY_BROWSER_NAME |  |  |  |
 | SE_NODE_RELAY_MAX_SESSIONS |  |  |  |
 | SE_NODE_RELAY_PLATFORM_NAME |  |  |  |
@@ -142,3 +141,5 @@
 | SE_SESSIONS_MAP_EXTERNAL_JDBC_USER |  |  |  |
 | SE_SESSIONS_MAP_EXTERNAL_PORT |  |  |  |
 | SE_SESSIONS_MAP_EXTERNAL_SCHEME |  |  |  |
+| SE_NODE_RELAY_STEREOTYPE |  | Capabilities in JSON string to overwrite the default Node relay stereotype |  |
+| SE_NODE_RELAY_STEREOTYPE_EXTRA |  | Extra capabilities in JSON string that wants to merge to the default Node relay stereotype |  |
diff --git a/Makefile b/Makefile
@@ -72,8 +72,8 @@ set_containerd_image_store:
 	docker info -f '{{ .DriverStatus }}'
 
 format_shell_scripts:
-	sudo apt-get update -qq ; \
-  sudo apt-get install -yq shfmt ; \
+	sudo apt-get update -qq || true ; \
+  sudo apt-get install -yq shfmt || true ; \
   shfmt -l -w -d $${PWD}/*.sh $${PWD}/**/*.sh $$PWD/**.sh $$PWD/**/generate_** $$PWD/**/wrap_* ; \
   git diff --stat --exit-code ; \
   EXIT_CODE=$$? ; \

diff --git a/NodeBase/generate_config b/NodeBase/generate_config
@@ -48,8 +48,7 @@ echo "session-timeout = ${SE_NODE_SESSION_TIMEOUT}" >>"$FILENAME"
 echo "override-max-sessions = ${SE_NODE_OVERRIDE_MAX_SESSIONS}" >>"$FILENAME"
 echo "detect-drivers = false" >>"$FILENAME"
 echo "drain-after-session-count = ${DRAIN_AFTER_SESSION_COUNT:-$SE_DRAIN_AFTER_SESSION_COUNT}" >>"$FILENAME"
-# When node is handled both browser and relay, SE_NODE_MAX_CONCURRENCY is used to configure max concurrency based on sum of them
-echo "max-sessions = ${SE_NODE_MAX_CONCURRENCY:-${SE_NODE_MAX_SESSIONS}}
+echo "max-sessions = ${SE_NODE_MAX_SESSIONS}
 " >>"$FILENAME"
 
 if [ -f /opt/selenium/browser_name ]; then

diff --git a/NodeBase/generate_relay_config b/NodeBase/generate_relay_config
@@ -17,8 +17,19 @@ if [[ -n "${SE_NODE_RELAY_URL}" ]]; then
 	if [[ -n "${SE_NODE_RELAY_PROTOCOL_VERSION}" ]]; then
 		echo "protocol-version = \"${SE_NODE_RELAY_PROTOCOL_VERSION}\"" >>"$FILENAME"
 	fi
-	echo "configs = [
-  \"${SE_NODE_RELAY_MAX_SESSIONS}\", \"{\\\"browserName\\\": \\\"${SE_NODE_RELAY_BROWSER_NAME}\\\", \\\"platformName\\\": \\\"${SE_NODE_RELAY_PLATFORM_NAME}\\\", \\\"appium:platformVersion\\\": \\\"${SE_NODE_RELAY_PLATFORM_VERSION}\\\"}\"
-  ]
-  " >>"$FILENAME"
+	if [[ -z "${SE_NODE_RELAY_STEREOTYPE}" ]]; then
+		SE_NODE_RELAY_STEREOTYPE="{\"browserName\": \"${SE_NODE_RELAY_BROWSER_NAME}\", \"platformName\": \"${SE_NODE_RELAY_PLATFORM_NAME}\", \"appium:platformVersion\": \"${SE_NODE_RELAY_PLATFORM_VERSION}\"}"
+	else
+		SE_NODE_RELAY_STEREOTYPE="${SE_NODE_RELAY_STEREOTYPE}"
+	fi
+	if [[ -n "${SE_NODE_RELAY_STEREOTYPE_EXTRA}" ]]; then
+		echo "Merging SE_NODE_RELAY_STEREOTYPE_EXTRA=${SE_NODE_RELAY_STEREOTYPE_EXTRA} to main relay stereotype"
+		SE_NODE_RELAY_STEREOTYPE="$(python3 /opt/bin/json_merge.py "${SE_NODE_RELAY_STEREOTYPE}" "${SE_NODE_RELAY_STEREOTYPE_EXTRA}")"
+		if [[ $? -ne 0 ]]; then
+			echo "Failed to merge SE_NODE_RELAY_STEREOTYPE_EXTRA. Please check the format of the JSON string. Keep using main relay stereotype."
+		else
+			echo "Merged relay stereotype: ${SE_NODE_RELAY_STEREOTYPE}"
+		fi
+	fi
+	echo "configs = ['${SE_NODE_RELAY_MAX_SESSIONS}', '${SE_NODE_RELAY_STEREOTYPE}']" >>"$FILENAME"
 fi
diff --git a/README.md b/README.md
@@ -1180,7 +1180,7 @@ The following is an en example of configuration relay commands.
 If you want to relay commands only, `selenium/node-base` is suitable and lightweight for this purpose.
 In case you want to configure node with both browsers and relay commands, respective node images can be used.
 
-To use environment variables for generate relay configs, set `SE_NODE_RELAY_URL` and other variables as below
+To use environment variables for generate relay configs, set `SE_NODE_RELAY_URL` and other variables as below. Those will be used to generate the default relay config in TOML format looks like below.
 
 ```toml
 [relay]
@@ -1190,6 +1190,10 @@ protocol-version = "${SE_NODE_RELAY_PROTOCOL_VERSION}"
 configs = [ '${SE_NODE_RELAY_MAX_SESSIONS}', '{"browserName": "${SE_NODE_RELAY_BROWSER_NAME}", "platformName": "${SE_NODE_RELAY_PLATFORM_NAME}", "appium:platformVersion": "${SE_NODE_RELAY_PLATFORM_VERSION}"}' ]
 ```
 
+Instead of input value for each environment variable to construct the default relay stereotype, you can use the `SE_NODE_RELAY_STEREOTYPE` environment variable to overwrite the default relay stereotype with your custom stereotype.
+
+In another case, if you want to retain the default relay stereotype and append additional capabilities, you can use the `SE_NODE_RELAY_STEREOTYPE_EXTRA` environment variable to set your capabilities. Those will be merged to the default relay stereotype.
+
 To run a sample test with the relayed node, you can clone the project and try below command:
 
 ```bash

diff --git a/scripts/generate_list_env_vars/description.yaml b/scripts/generate_list_env_vars/description.yaml
@@ -378,10 +378,6 @@
 - name: SE_NODE_HOST
   description: ''
   cli: ''
-- name: SE_NODE_MAX_CONCURRENCY
-  description: When node is handled both browser and relay, SE_NODE_MAX_CONCURRENCY
-    is used to configure max concurrency based on sum of them
-  cli: ''
 - name: SE_NODE_RELAY_BROWSER_NAME
   description: ''
   cli: ''
@@ -431,3 +427,10 @@
 - name: SE_SESSIONS_MAP_EXTERNAL_SCHEME
   description: ''
   cli: ''
+- name: SE_NODE_RELAY_STEREOTYPE
+  description: Capabilities in JSON string to overwrite the default Node relay stereotype
+  cli: ''
+- name: SE_NODE_RELAY_STEREOTYPE_EXTRA
+  description: Extra capabilities in JSON string that wants to merge to the default
+    Node relay stereotype
+  cli: ''
diff --git a/scripts/generate_list_env_vars/value.yaml b/scripts/generate_list_env_vars/value.yaml
@@ -96,8 +96,6 @@
   default: '30'
 - name: SE_NODE_HOST
   default: ''
-- name: SE_NODE_MAX_CONCURRENCY
-  default: ''
 - name: SE_NODE_MAX_SESSIONS
   default: '1'
 - name: SE_NODE_OVERRIDE_MAX_SESSIONS
@@ -124,6 +122,10 @@
   default: ''
 - name: SE_NODE_RELAY_STATUS_ENDPOINT
   default: ''
+- name: SE_NODE_RELAY_STEREOTYPE
+  default: ''
+- name: SE_NODE_RELAY_STEREOTYPE_EXTRA
+  default: ''
 - name: SE_NODE_RELAY_URL
   default: ''
 - name: SE_NODE_SESSION_TIMEOUT

diff --git a/tests/docker-compose-v3-test-node-relay.yml b/tests/docker-compose-v3-test-node-relay.yml
@@ -68,6 +68,7 @@ services:
       - SE_NODE_RELAY_PLATFORM_NAME=Android
       - SE_NODE_RELAY_PLATFORM_VERSION=${ANDROID_PLATFORM_API}
       - SE_NODE_RELAY_BROWSER_NAME=chrome
+      - SE_NODE_RELAY_STEREOTYPE_EXTRA={"myApp:version":"beta","myApp:publish":"public"}
       - SE_NODE_RELAY_WEB_VNC=ws://emulator:6080/websockify
 
   emulator:

diff --git a/tests/relay_config.toml b/tests/relay_config.toml
@@ -13,5 +13,5 @@ max-sessions = 1
 url = "http://standalone:4444/wd/hub"
 status-endpoint = "/status"
 configs = [
-    '1', '{"browserName":"${BROWSER_NAME}","platformName":"linux"}'
+    '3', '{"browserName":"${BROWSER_NAME}","platformName":"linux"}'
 ]