Error connecting: Error while fetching server API version: Ansible - docker

Question

I'm very new at Ansible. I've run following ansible PlayBook and found those errors:
---
- hosts: webservers
remote_user: linx
become: yes
become_method: sudo
tasks:
- name: install docker-py
pip: name=docker-py
- name: Build Docker image from Dockerfile
docker_image:
name: web
path: docker
state: build
- name: Running the container
docker_container:
image: web:latest
path: docker
state: running
- name: Check if container is running
shell: docker ps
Error message:
FAILED! => {"changed": false, "msg": "Error connecting: Error while
fetching server API version: ('Connection aborted.', error(2, 'No such
file or directory'))"}
And here is my folder structure:
.
├── ansible.cfg
├── docker
│   └── Dockerfile
├── hosts
├── main.retry
├── main.yml
I'm confused that docker folder is already inside my local but don't know why I encountered those error message.

Answer 1

I've found solution is Docker daemon is not working after Docker was installed by Ansible. It's required to add following command in my play board.
---
- hosts: webservers
remote_user: ec2-user
become: yes
become_method: sudo
tasks:
- name: install docker
yum: name=docker
**- name: Ensure service is enabled
command: service docker restart***
- name: copying file to remote
copy:
src: ./docker
dest: /home/ec2-user/docker
- name: Build Docker image from Dockerfile
docker_image:
name: web
path: /home/ec2-user/docker
state: build
- name: Running the container
docker_container:
image: web:latest
name: web
- name: Check if container is running
shell: docker ps

Answer 2

I have faced the same problem. I am trying to perform a docker login and get the same weird error. In my case, the ansible user does not have the necessary docker credentials. The solution, in that case, is to switch to a user with docker credentials:
- name: docker login
hosts: my_server
become: yes
become_user: docker_user
tasks:
- docker_login:
registry: myregistry.com
username: myusername
password: mysecret