是否可以在dict键中使用破折号? [英] Are dashes allowed in dict keys in ansible?

问题描述

我对剧本有疑问，想知道问题是否在于我使用的字典中的某些键名中带有破折号.无论是否允许，Ansible尚不清楚.

I have an issue with a playbook, and wonder if the issue is that some key names in the dictionary I use have a dash in them. Ansible is not clear wether this is allowed or not.

我正在使用nmstatectl获取一个描述RHEL8主机上当前网络配置的json.json输出使用其中带有破折号的键，我想几乎照原样使用输出.

I am using nmstatectl to get a json that describes the current network config on a RHEL8 host. The json output uses keys that have a dash in them, and I would like to use the output pretty much as is.

剧本:

- name: check static route using nmstatectl
  hosts: rhv


  tasks:
  - name: collect network config
    command:
      cmd: nmstatectl show --json
    register: nmstate
    changed_when: false

  - name: set fact with block storage route config
    set_fact:
      block_storage_route: "{{ nmstate.stdout | from_json | json_query(query) }}"
    vars:
      query: "routes.config[?destination == '{{ block_storage_cidr }}' ]"

  - debug:
      var: block_storage_route

  - debug:
      var: block_storage_route[0].destination    

  - debug:
      var: block_storage_route[0].table-id

输出:

...
TASK [debug] ************************************************************************************************************************
ok: [one.example.com] => {
    "block_storage_route": [
        {
            "destination": "10.201.142.0/24",
            "metric": 301,
            "next-hop-address": "10.123.231.161",
            "next-hop-interface": "bond0.1161",
            "table-id": 0
        }
    ]
}

TASK [debug] ************************************************************************************************************************
ok: [one.example.com] => {
    "block_storage_route[0].destination": "10.201.142.0/24"
}

TASK [debug] ************************************************************************************************************************
ok: [one.example.com] => {
    "block_storage_route[0].table-id": "VARIABLE IS NOT DEFINED!"
}

如您所见，我得到一个未定义变量"错误.即使键"table-id"仍然存在，存在...为什么?

As you can see I get a "VARIABLE IS NOT DEFINED" error. That even though the key "table-id" is present... Why?

推荐答案

Q:" Ansible词典中的键中是否允许使用破折号?"

Q: "Are dashes allowed in dictionary keys in Ansible?"

A:是的.他们是.实际上，YAML对密钥没有任何限制.引用自映射(又名Python字典)

A: Yes. They are. In fact, there are no restrictions in YAML on the keys. Quoting from Mapping (aka Python dictionary)

"映射节点的内容是无序的一组键:值节点对，但每个键都是唯一的.YAML对节点没有进一步的限制.特别是，键可以是任意节点，...''

使用方括号标记创建有效的变量名称

Use bracket notation instead of the dot notation when the name of the key doesn't comply with Ansible Creating valid variable names

    - debug:
        var: block_storage_route[0]['table-id']

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