获取错误-在模板化字符串时使用jinja2 - template错误获取错误调试消息:应为表达式，获取语句块的结尾

Question

我将以下任务结果注册到"output“变量

TASK [bgp status] ****************************************************************************************************************************************************************************
ok: [4.4.4.4] => {
    "msg": [
        {
            "bgp_state": "Established",
            "neighbor": "1.1.1.1",
        },
        {
            "bgp_state": "Down",
            "neighbor": "2.2.2.2",

        },
        {
            "bgp_state": "Established",
            "neighbor": "3.3.3.3",

        }
    ]
}

我的debus任务是这样的：

- name: bgp status
     debug:
       msg:
            - "{% if output.msg[0].bgp_state == Established %}{{output.msg[0].neighbor}} BGP IS UP{% elif %}{{output.msg[0].neighbor}}BGP IS DOWN{%- endif %}"
            - "{% if output.msg[1].bgp_state == Established %}{{output.msg[1].neighbor}}BGP IS UP{% elif %}{{output.msg[1].neighbor}}BGP IS DOWN{%- endif %}"
            - "{% if output.msg[2].bgp_state == Established %}{{output.msg[2].neighbor}}BGP IS UP{% elif %}{{output.msg[2].neighbor}}BGP IS DOWN{%- endif %}"

错误：

fatal: [4.4.4.4]: FAILED! => {"msg": "template error while templating string: Expected an expression, got 'end of statement block'. String: {% if output.msg[0].bgp_state == Established %}{{output.msg[0].neighbor}}BGP IS UP{% elif %}{{output.msg[0].neighbor}}BGP IS DOWN{%- endif %}"}

我知道我做错了，但不确定我的调试任务中的错误在哪里？

预期输出：

1.1.1.1 BGP IS UP
2.2.2.2 BGP IS DOWN
3.3.3.3 BGP IS UP

Answer 1

你已经写了：

{% elif %}{{output.msg[0].neighbor}}BGP IS DOWN{%- endif %}

但我想你的意思是

..。

需要条件表达式，就像

..。此外，还需要将字符串值用引号引起来。

表达式。

解决这两个问题，我们得到：

- name: bgp status
     debug:
       msg:
         - '{% if output.msg[0].bgp_state == "Established" %}{{output.msg[0].neighbor}} BGP IS UP{% else %}{{ output.msg[0].neighbor }} BGP IS DOWN{%- endif %}'
         - '{% if output.msg[1].bgp_state == "Established" %}{{output.msg[1].neighbor}} BGP IS UP{% else %}{{ output.msg[1].neighbor }} BGP IS DOWN{%- endif %}'
         - '{% if output.msg[2].bgp_state == "Established" %}{{output.msg[2].neighbor}} BGP IS UP{% else %}{{ output.msg[2].neighbor }} BGP IS DOWN{%- endif %}'

给定示例输入，将生成以下结果：

TASK [bgp status] ****************************************************************************
ok: [localhost] => {
    "msg": [
        "1.1.1.1 BGP IS UP",
        "2.2.2.2 BGP IS DOWN",
        "3.3.3.3 BGP IS UP"
    ]
}

如果我在写这篇文章，我可能会重新格式化以获得更好的可读性，并将任务放在循环中：

- name: bgp status
      debug:
        msg:
          - >-
            {% if item.bgp_state == "Established" %}
            {{item.neighbor}} BGP IS UP
            {% else %}
            {{ item.neighbor }} BGP IS DOWN
            {%- endif %}
      loop: "{{ output.msg }}"