初识play中的connnection: local

先看下建立主机互信和分发主机公钥信息的栗子：

- name: configure ssh connection
  hosts: new
  gather_facts: false
  connection: local
  tasks:
    - name: configure ssh connection
      shell: 
        ssh-keyscan {{inventory_hostname}} >> ~/.ssh/known_hosts
        sshpass -p'xxxxxxx' ssh-copy-id root@{{inventory_hostname}}

解释一下，上述play中定义了 play级别connection连接配置信息，意思就是在Ansible本地执行 N次（由筛选出的inventory主机数量决定），如果有多个tasks，那么每个task都将执行N次。

利用script模块在受控端执行Ansible上的shell脚本

- name: use script module
  hosts: new
  gather_facts: false
  tasks: 
    - name: use script module
      script: /tmp/hello.sh HELLOWORLD

执行结果：

[root@pg01 ~]# ansible-playbook -v hello_script.yaml 
Using /etc/ansible/ansible.cfg as config file

PLAY [use some module] *********************************************************************************************************************************************************************************************

TASK [use script module] *******************************************************************************************************************************************************************************************
changed: [10.0.31.92] => {"changed": true, "rc": 0, "stderr": "Shared connection to 10.0.31.92 closed.\r\n", "stderr_lines": ["Shared connection to 10.0.31.92 closed."], "stdout": "hello world: HELLOWORLD\r\n", "stdout_lines": ["hello world: HELLOWORLD"]}
changed: [10.0.31.91] => {"changed": true, "rc": 0, "stderr": "Shared connection to 10.0.31.91 closed.\r\n", "stderr_lines": ["Shared connection to 10.0.31.91 closed."], "stdout": "hello world: HELLOWORLD\r\n", "stdout_lines": ["hello world: HELLOWORLD"]}

PLAY RECAP *********************************************************************************************************************************************************************************************************
10.0.31.91                 : ok=1    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0   
10.0.31.92                 : ok=1    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0