Ansible日期变量

Question

我正在努力学习如何使用Ansible事实作为变量,我不明白.当我跑...

$ ansible localhost -m setup

...它列出了我系统的所有事实.我随机选择了一个来尝试使用它,ansible_facts.ansible_date_time.date,但我无法弄清楚如何使用它.当我跑...

$ ansible localhost -m setup -a "filter=ansible_date_time"
localhost | success >> {
    "ansible_facts": {
        "ansible_date_time": {
            "date": "2015-07-09",
            "day": "09",
            "epoch": "1436460014",
            "hour": "10",
            "iso8601": "2015-07-09T16:40:14Z",
            "iso8601_micro": "2015-07-09T16:40:14.795637Z",
            "minute": "40",
            "month": "07",
            "second": "14",
            "time": "10:40:14",
            "tz": "MDT",
            "tz_offset": "-0600",
            "weekday": "Thursday",
            "year": "2015"
        }
    },
    "changed": false
}

所以,那里很清楚.但是当我跑...

$ ansible localhost -a "echo {{ ansible_facts.ansible_date_time.date }}"
localhost | FAILED => One or more undefined variables: 'ansible_facts' is undefined

$ ansible localhost -a "echo {{ ansible_date_time.date }}"
localhost | FAILED => One or more undefined variables: 'ansible_date_time' is undefined

$ ansible localhost -a "echo {{ date }}"
localhost | FAILED => One or more undefined variables: 'date' is undefined

我没有到这里来的是什么？我如何使用Facts作为变量？

Answer 1

该命令ansible localhost -m setup基本上表示"对localhost运行安装模块",安装模块收集您在输出中看到的事实.

运行该echo命令时,由于未运行安装模块,因此这些事实不存在.测试这样的事情的更好方法是使用ansible-playbook来运行看起来像这样的剧本:

- hosts: localhost
  tasks:
      - debug: var=ansible_date_time

      - debug: msg="the current date is {{ ansible_date_time.date }}"

因为这是一个playbook,所以在运行任务之前会收集localhost的事实.上面的剧本的输出将是这样的:

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

GATHERING FACTS ***************************************************************
ok: [localhost]

TASK: [debug var=ansible_date_time] *******************************************
ok: [localhost] => {
    "ansible_date_time": {
        "date": "2015-07-09",
        "day": "09",
        "epoch": "1436461166",
        "hour": "16",
        "iso8601": "2015-07-09T16:59:26Z",
        "iso8601_micro": "2015-07-09T16:59:26.896629Z",
        "minute": "59",
        "month": "07",
        "second": "26",
        "time": "16:59:26",
        "tz": "UTC",
        "tz_offset": "+0000",
        "weekday": "Thursday",
        "year": "2015"
    }
}

TASK: [debug msg="the current date is {{ ansible_date_time.date }}"] **********
ok: [localhost] => {
    "msg": "the current date is 2015-07-09"
}

PLAY RECAP ********************************************************************
localhost      : ok=3    changed=0    unreachable=0    failed=0

Answer 2

ansible的查找模块对我来说很好.yml是:

__CODE__

您可以使用date替换任何命令以获取命令的结果.

Answer 3

请注意，该ansible命令不会收集事实，但该ansible-playbook命令会收集事实。运行时ansible -m setup，安装模块碰巧运行事实集合，以便您获取事实，但运行ansible -m command不会。因此，事实不可用。这就是为什么其他答案包括剧本 YAML 文件并表明查找有效的原因。