External mode can't dispatch code node to task runners container execute

[inchonline]

hello,friends,I’m new here.

I use the external mode run n8n,
when run “docker-compose up -d”,
everything is ok,
but when I make a workflow which contain a python code node,
then code:
import socket
return [{
“hostname”: socket.gethostname(),
“message”: f"Running in container: {socket.gethostname()}",
“success”: True
}]

output:
1 item
[
{
“hostname”:
“emscripten”,
“message”:
“Running in container: emscripten”,
“success”:
true
}
]

however,the task runners container hostname is: server_n8n_runners

It really make me confused!

when execute:
docker-compose exec n8n curl -H “Authorization: Bearer test” http://localhost:5678/rest/settings?keys=executionMode

I find ---- “executionMode”:“regular”,
AI answers this should be “queue”,
but the n8n webs can’t modify the “executionMode”,
hope some exprienced friend could work my quetions out ,thanks!

below is my yaml config file:

version: '3.8'

volumes:
  db_storage:
    driver_opts:
      type: none
      o: bind
      device: /home/docker/pgsql17/db_data  # 宿主机上的绝对路径
  n8n_storage:
    driver_opts:
      type: none
      o: bind
      device: /home/docker/n8n_runner_mode/n8n_home  # 宿主机上的另一个绝对路径

services:
  postgres:
    image: postgres:17
    restart: always
    container_name: pg17
    hostname: server_pg17
    environment:
      - POSTGRES_USER
      - POSTGRES_PASSWORD
      - POSTGRES_DB
      - POSTGRES_NON_ROOT_USER
      - POSTGRES_NON_ROOT_PASSWORD
      - TZ=Asia/Shanghai  # 设置时区环境变量
    ports:
      - 5432:5432
    volumes:
      - db_storage:/var/lib/postgresql/data
      - /home/docker/pgsql17/db_backup:/backups
      - ./init-data.sh:/docker-entrypoint-initdb.d/init-data.sh
      - ./apt_source.conf:/etc/apt/sources.list.d/pgdg.list
      - ./pip.conf:/etc/pip.conf
      - ./uv.toml:/home/root/.config/uv/uv.toml
      - /etc/localtime:/etc/localtime:ro  # 挂载宿主机时区文件
      - /etc/timezone:/etc/timezone:ro    # 挂载宿主机时区配置
    healthcheck:
      test: ['CMD-SHELL', 'pg_isready -h localhost -U ${POSTGRES_USER} -d ${POSTGRES_DB}']
      interval: 5s
      timeout: 5s
      retries: 10
    networks:
      - n8n_net

  n8n:
    image: n8nio/n8n:1.113.3
    restart: always
    container_name: n8n_main
    hostname: server_n8n_main
    environment:
      - DB_TYPE=postgresdb
      - DB_POSTGRESDB_HOST=postgres
      - DB_POSTGRESDB_PORT=5432
      - DB_POSTGRESDB_DATABASE=${POSTGRES_DB}
      - DB_POSTGRESDB_USER=${POSTGRES_USER}
      - DB_POSTGRESDB_PASSWORD=${POSTGRES_PASSWORD}
      - N8N_ENFORCE_SETTINGS_FILE_PERMISSIONS=true
      - N8N_RUNNERS_ENABLED=true
      - N8N_RUNNERS_BROKER_LISTEN_ADDRESS=0.0.0.0
      - N8N_RUNNERS_MODE=external # 关键：设置为外部模式
      - N8N_RUNNERS_AUTH_TOKEN=test
      - N8N_LOG_LEVEL=debug
      - N8N_COMMUNITY_PACKAGES_ALLOW_TOOL_USAGE=true
      - N8N_SECURE_COOKIE=false
      - N8N_BLOCK_ENV_ACCESS_IN_NODE=false
      - N8N_GIT_NODE_DISABLE_BARE_REPOS=true
      - TZ=Asia/Shanghai  # 设置时区环境变量
      - N8N_TIMEZONE=Asia/Shanghai
      - GENERIC_TIMEZONE=Asia/Shanghai
    ports:
      - 5678:5678
    expose:
      - "5679"
    volumes:
      - n8n_storage:/home/node/.n8n
      - /home/docker/n8n_runner_mode/n8n_data:/data
      - ./repositories:/etc/apk/repositories
      - ./pip.conf:/etc/pip.conf
      - ./uv.toml:/root/.config/uv/uv.toml
      - /etc/localtime:/etc/localtime:ro  # 挂载宿主机时区文件
      - /etc/timezone:/etc/timezone:ro    # 挂载宿主机时区配置
    depends_on:
      - postgres
    networks:
      - n8n_net

  task_runners:
    image: n8nio/runners:1.113.3
    restart: always
    container_name: n8n_runners
    hostname: server_n8n_runners
    environment:
      - N8N_RUNNERS_AUTH_TOKEN=test
      - N8N_RUNNERS_TASK_BROKER_URI=http://n8n_main:5679
      - NODE_FUNCTION_ALLOW_BUILTIN=*
      - NODE_FUNCTION_ALLOW_EXTERNAL=*
      - N8N_RUNNERS_STDLIB_ALLOW=*
      - N8N_RUNNERS_EXTERNAL_ALLOW=*
      - N8N_RUNNERS_LAUNCHER_LOG_LEVEL=debug
      - TZ=Asia/Shanghai  # 设置时区环境变量
    volumes:
      - /etc/localtime:/etc/localtime:ro  # 挂载宿主机时区文件
      - /etc/timezone:/etc/timezone:ro    # 挂载宿主机时区配置
      - ./repositories:/etc/apk/repositories
      - ./pip.conf:/etc/pip.conf
      - ./uv.toml:/home/runner/.config/uv/uv.toml
    expose:
      - "5680"
    depends_on:
      - n8n
    networks:
      - n8n_net

networks:
  n8n_net:
    driver: bridge