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docker网络问题导致dify添加API不能成功，如添加SearXNG

article 2025/3/17 3:13:27

背景

dify添加SearXNG检索工具
使用dify添加SearXNG搜索工具，在工具栏输入

http://host.docker.internal:8081

不能添加成功
问题的核心是容器无法解析 host.docker.internal 这个域名，这通常是因为 Docker 的网络配置或宿主机的环境设置不支持该域名解析。

所以我选择在dify项目的docker配置文件中添加host配置

  extra_hosts:  # 添加 extra_hosts 配置
    - "host.docker.internal:172.17.0.1"  # 替换为宿主机的 IP 地址

具体如下

# API service
api:
  image: langgenius/dify-api:0.15.3
  restart: always
  environment:
    # Use the shared environment variables.
    <<: *shared-api-worker-env
    # Startup mode, 'api' starts the API server.
    MODE: api
    SENTRY_DSN: ${API_SENTRY_DSN:-}
    SENTRY_TRACES_SAMPLE_RATE: ${API_SENTRY_TRACES_SAMPLE_RATE:-1.0}
    SENTRY_PROFILES_SAMPLE_RATE: ${API_SENTRY_PROFILES_SAMPLE_RATE:-1.0}
  depends_on:
    - db
    - redis
  volumes:
    # Mount the storage directory to the container, for storing user files.
    - ./volumes/app/storage:/app/api/storage
  networks:
    - ssrf_proxy_network
    - default
  extra_hosts:  # 添加 extra_hosts 配置
    - "host.docker.internal:172.17.0.1"  # 替换为宿主机的 IP 地址

# worker service
# The Celery worker for processing the queue.
worker:
  image: langgenius/dify-api:0.15.3
  restart: always
  environment:
    # Use the shared environment variables.
    <<: *shared-api-worker-env
    # Startup mode, 'worker' starts the Celery worker for processing the queue.
    MODE: worker
    SENTRY_DSN: ${API_SENTRY_DSN:-}
    SENTRY_TRACES_SAMPLE_RATE: ${API_SENTRY_TRACES_SAMPLE_RATE:-1.0}
    SENTRY_PROFILES_SAMPLE_RATE: ${API_SENTRY_PROFILES_SAMPLE_RATE:-1.0}
  depends_on:
    - db
    - redis
  volumes:
    # Mount the storage directory to the container, for storing user files.
    - ./volumes/app/storage:/app/api/storage
  networks:
    - ssrf_proxy_network
    - default
  extra_hosts:  # 添加 extra_hosts 配置
    - "host.docker.internal:172.17.0.1"  # 替换为宿主机的 IP 地址