1.通過debug模組去確認返回結果的資料結構

獲取Task任務結果
- name: check nginx syntax
  shell: /usr/sbin/nginx -t
  register: nginxsyntax

通過debug模組去確認返回結果的資料結構
- name: print nginx syntax result
  debug: var=nginxsyntax

"nginxsyntax": {
        "changed": true,
        "cmd": "/usr/sbin/nginx -t",
        "delta": "0:00:00.012045",
        
 
"end": "2017-08-12 20:19:04.650718",
        "rc": 0,
        "start": "2017-08-12 20:19:04.638673",
        "stderr": "nginx: the configuration file /etc/nginx/nginx.conf syntax is ok\nnginx: configuration file /etc/nginx/nginx.conf test is successful",
        "stderr_lines": [
            "nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
 
",
            "nginx: configuration file /etc/nginx/nginx.conf test is successful"
        ],
        "stdout": "",
        "stdout_lines": []
    }

2.我的debug

---
- name: a template example
  hosts: frame
  remote_user: root
  tasks:
    - name: max login try count
      shell: egrep -i 'MaxAuthTries
 
'  /etc/ssh/sshd_config |awk '{print $2}'
      register: try_count
    - name: echo last shell result var
      debug: var=try_count

    - name: echo last shell result
      debug:
        msg: "{{ try_count['stdout_lines'] }}"

TASK [max login try count] *************************************************************************************************************************
changed: [10.0.0.4]

TASK [echo last shell result var] ******************************************************************************************************************
ok: [10.0.0.4] => {
"try_count": {
"changed": true,
"cmd": "egrep -i 'MaxAuthTries' /etc/ssh/sshd_config |awk '{print $2}'",
"delta": "0:00:00.050398",
"end": "2020-10-27 21:05:05.333621",
"failed": false,
"rc": 0,
"start": "2020-10-27 21:05:05.283223",
"stderr": "",
"stderr_lines": [],
"stdout": "6",
"stdout_lines": [
"6"
]
}
}

TASK [echo last shell result] **********************************************************************************************************************
ok: [10.0.0.4] => {
"msg": [
"6"
]
}