Ansible 是基于 SSH 的自动化配置管理和部署工具，更多请参考官方文档。

ansible -i hosts.ini all -m ping
ansible-playbook -i hosts.ini playbook.yaml

用 Ansible + Supervisor 部署／更新应用：

- hosts: server
  tasks:
  - name: check if exists
    stat: path=/path/to/app
    register: check_path
  - name: clone
    shell: git clone XXX && git checkout -b release
    when: check_path.stat.exists == false
  - name: pull
    shell: cd /path/to/app && git pull origin release
    when: check_path.stat.exists
  - name: is already running ?
    stat: path=/tmp/supervisord.pid
    register: supervisord_stat
  - name: restart
    command: supervisorctl -c supervisord.conf restart all
    args:
      chdir: /path/to/app
    when: supervisord_stat.stat.exists
  - name: start
    command: supervisord -c supervisord.conf
    args:
      chdir: /path/to/app
    when: supervisord_stat.stat.exists == false