Katacode Traefik教程错误-容器未创建

Question

我正在使用Traefik - https://www.katacoda.com/courses/traefik/deploy-load-balancer尝试用于负载平衡容器的Katacoda游乐场。

下面是本教程中用于启动Traefik节点和2个测试容器的完全Docker脚本：

  image: traefik
  command: --web --docker --docker.domain=docker.localhost --logLevel=DEBUG
  ports:
    - "80:80"
    - "8080:8080"
    - "443:443"
  volumes:
    - /var/run/docker.sock:/var/run/docker.sock
    - /dev/null:/traefik.toml

machine:
  image: katacoda/docker-http-server
  labels:
    - "traefik.backend=machine-echo"
    - "traefik.frontend.rule=Host:machine-echo.example.com"

echo:
  image: katacoda/docker-http-server:v2
  labels:
    - "traefik.backend=echo"
    - "traefik.frontend.rule=Host:echo-echo.example.com"

我运行命令，如教程中所示：

$ docker-compose up -d
Creating tutorial_traefik_1 ... done
Creating tutorial_echo_1    ... done
Creating tutorial_machine_1 ... done

但是，当我检查容器列表时，我只能看到只创建了2个容器。未创建Traefik容器：

$ docker container ls
CONTAINER ID        IMAGE                            COMMAND             CREATED             STATUS              PORTS               NAMES
35e87a3ff6ed        katacoda/docker-http-server      "/app"              11 seconds ago      Up 9 seconds        80/tcp              tutorial_machine_1
a455019d16be        katacoda/docker-http-server:v2   "/app"              11 seconds ago      Up 9 seconds        80/tcp              tutorial_echo_1 

下一步也失败了。这可能是因为Traefik容器没有运行：

$ curl -H Host:machine-echo.example.com http://host01
curl: (7) Failed to connect to host01 port 80: Connection refused

谁能复制本教程，请让我知道原因和修复此错误？

Answer 1

只需在今天运行，您必须将traefik版本硬编码为1.7.32

traefik:
  image: traefik:1.7.32
  command: --web --docker --docker.domain=docker.localhost --logLevel=DEBUG
  ports:
    - "80:80"
    - "8080:8080"
    - "443:443"
  volumes:
    - /var/run/docker.sock:/var/run/docker.sock
    - /dev/null:/traefik.toml

machine:
  image: katacoda/docker-http-server
  labels:
    - "traefik.backend=machine-echo"
    - "traefik.frontend.rule=Host:machine-echo.example.com"

echo:
  image: katacoda/docker-http-server:v2
  labels:
    - "traefik.backend=echo"
    - "traefik.frontend.rule=Host:echo-echo.example.com"