json - Ansible:带冒号的 json 元素带键

Question

如何使用 jinja2 rejectattr 删除包含冒号 (:) 的 json 键。

环境:

ansible 2.9.1
  config file = None
  configured module search path = [u'/home/<user>/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/dist-packages/ansible
  executable location = /usr/bin/ansible
  python version = 2.7.15+ (default, Oct  7 2019, 17:39:04) [GCC 7.4.0]

json数据:

   {
        "tag:environment": "qa", 
        "tag:instance_id": "i-123456789"
    }

Ansible 剧本:

- name: Remove InstanceID
  debug:
    msg:  "{{ instance_filter | rejectattr('['tag:environment'], 'defined' ') | list  }}

实际结果:

fatal: [localhost]: FAILED! => {
    "msg": "template error while templating string: expected token ',', got 'tag'. String: {{ instance_filter | rejectattr('['tag:environment'], 'defined' ') | list  }}"
}

预期结果:

   {
        "tag:environment": "qa"
   }

Answer 1

rejectattr 确实是用于实现您的目标的关键过滤器之一，但还需要一些其他的东西。这是从您拥有的字典变量中删除特定键的正确过滤器顺序:

剧本:

---
- hosts: localhost
  gather_facts: false
  vars:
    instance_filter:
      tag:environment: qa
      tag:instance_id: i-123456789

  tasks:
  - name: print var
    debug:
      var: instance_filter

  - name: manipulate the var
    debug:
      msg: "{{ instance_filter | dict2items | rejectattr('key', 'equalto', 'tag:instance_id') | list | items2dict }}"

输出:

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

TASK [print var] *******************************************************************************************************************************************************************************************************
ok: [localhost] => {
    "instance_filter": {
        "tag:environment": "qa",
        "tag:instance_id": "i-123456789"
    }
}

TASK [manipulate the var] **********************************************************************************************************************************************************************************************
ok: [localhost] => {
    "msg": {
        "tag:environment": "qa"
    }
}

PLAY RECAP *************************************************************************************************************************************************************************************************************
localhost                  : ok=2    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

希望对您有所帮助。