# 實際操作測試2 - Docker容器部署

## Pull an image

```
# Install ansible
sudo apt-get update
sudo apt-get install software-properties-common
sudo apt-add-repository ppa:ansible/ansible
sudo apt-get update
sudo apt-get install ansible
# Install pip and docker-py
sudo apt-get install python-pip python-dev build-essential 
sudo pip install --upgrade pip
sudo pip install docker-py
```

## Edit the playbook

```
- hosts: localhost
  become: true # use root user with sudo
  tasks:
  - name : Pull Ubuntu Image
    docker_image:
      name: ubuntu
```

Run ansible-book docker\_pull.yml

```
[WARNING]: log file at /var/log/ansible.log is not writeable and we cannot create it, aborting

 [WARNING]:  * Failed to parse /etc/ansible/hosts with yaml plugin: Syntax Error while loading YAML.   did not find expected <document start>  The error appears to be in '/etc/ansible/hosts': line 45, column 1, but may be elsewhere in
the file depending on the exact syntax problem.  The offending line appears to be:  [apache] apache2 ansible_host=syrus@192.168.1.108 ansible_port=22 ^ here

 [WARNING]:  * Failed to parse /etc/ansible/hosts with ini plugin: /etc/ansible/hosts:49: Expected key=value host variable assignment, got: ansible_

 [WARNING]: Unable to parse /etc/ansible/hosts as an inventory source

 [WARNING]: No inventory was parsed, only implicit localhost is available

 [WARNING]: provided hosts list is empty, only localhost is available. Note that the implicit localhost does not match 'all'


PLAY [localhost] ****************************************************************************************************************************************************************************************************************************

TASK [Gathering Facts] **********************************************************************************************************************************************************************************************************************
ok: [localhost]

TASK [Pull Ubuntu Image] ********************************************************************************************************************************************************************************************************************
 [WARNING]: The value of the "source" option was determined to be "pull". Please set the "source" option explicitly. Autodetection will be removed in Ansible 2.12.

changed: [localhost]

PLAY RECAP **********************************************************************************************************************************************************************************************************************************
localhost                  : ok=2    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

```


---

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