带有 docker-compose 的 Traefik 创建了太多的前端

Question

我想将多个 docker-compose 项目与 Traefik 一起用作反向代理。在遵循文档之后，我创建了两个 docker-compose 文件；一个用于 Traefik，另一个用于具有 2 个“whoami”容器的示例项目。

这对后端很有用，但似乎 Traefik 为每个正在运行的容器创建了一个前端。因此，我定义了两个前端，而不是 2 个 whoami 容器的 1 个前端:“frontend-Host-whoami-localhost-0”和“frontend-Host-whoami-localhost-1”。

如果我扩展 whoami 服务(通过在 docker-compose.yaml 文件中复制它们的定义，或使用 docker-compose scale whoami=10 )，Traefik 将创建更多前端。

我只想要一个“Host:whoami.localhost”规则的前端，它指向一个后端，并连接了多个正在运行的容器。我怎样才能做到这一点？

traefik.toml:

defaultEntryPoints = ["http"]

[web]
address = ":8080"

[entryPoints]
    [entryPoints.http]
    address = ":80"

[docker]
endpoint = "unix:///var/run/docker.sock"
domain = "localhost"

docker-compose.yaml(用于 traefik):

version: "2"
services:
  traefik:
    container_name: traefik
    image: traefik
    networks:
      - webgateway
    ports:
      - "80:80"
      - "8080:8080"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - ./traefik.toml:/traefik.toml
    labels:
      traefik.backend: web
      traefik.frontend.rule: Host:monitor.localhost

networks:
  webgateway:
    driver: bridge

whoami/docker-compose.yaml:

version: "2"
services:
  whoami:
    image: emilevauge/whoami
    networks:
      - webgateway
    labels:
      traefik.backend: whoami
      traefik.frontend.rule: Host:whoami.localhost

  whoami_2:
    image: emilevauge/whoami
    networks:
      - webgateway
    labels:
      traefik.backend: whoami
      traefik.frontend.rule: Host:whoami.localhost

networks:
  webgateway:
    external:
      name: traefikdocker_webgateway

Answer 1

我想你想要这样:

http://example.com/
|-> app1 who serve http://example.com/foo
|-> app2 who serve http://example.com/bar

为此，您必须使用另一个 matcher (例如 PathPrefix 示例):

traefik.frontend.rule: Host:http://example.com/; PathPrefix:/foo
|-> app1 who serve http://example.com/foo

traefik.frontend.rule: Host:http://example.com/; PathPrefix:/bar
|-> app2 who serve http://example.com/bar

如果你只是想扩展，你的 composefile 中只需要一个服务:

traefik.frontend.rule: Host:http://example.com/
|-> 10 x app (docker-compose scale app=10)