无法将ansible playbook加载到docker主机（主机无法访问）

Question

我试图：ansible-playbook install_docker.yml

并不断收到以下错误：

TASK [setup] *******************************************************************

fatal: [172.17.0.2]: UNREACHABLE! => {"changed": false, "msg": "ERROR! SSH encountered an unknown error during the connection. We recommend you re-run the command using -vvvv, which will enable SSH debugging output to help diagnose the issue", "unreachable": true}

我的剧本看起来像这样

---

- hosts: all

vars:

docker_opts: >

  - "H unix:///var/run/docker.sock"

  - "H tcp://0.0.0.0:2375"

remote_user: root

roles:

 - angstwad.docker.ubuntu

通过使用以下方式复制ip来提供docker主机ip：

docker inspect apacheweb1 | grep IPAddress

我怎样才能到达泊坞主机？