Ansible Loop and Update Dict

问题

I'm trying to use Ansible to loop through a nested dict and add a new key:value. I'm able to add a value using combine to the top-level dict but unsure how to update the value dict. I see that loop can be used to iterate through the dict but how can update be done at the same time?

My Dict

{'host-a': {'os': 'Linux', 'port': '22', 'status': 'Running'},
 'host-b': {'os': 'Linux', 'port': '22', 'status': 'Running'},
 'host-c': {'os': 'Linux', 'port': '22', 'status': 'Running'}}

I'm able to append to the top level dict but not sure how to loop through and another key:value to the nested dict list.

tasks:
 - name: Iterate and update dict
   set_fact:
     my_dict: '{{my_dict|combine({"location": "building-a"})}}'
 - debug: var=my_dict

Desired Dict after update:

{'host-a': {'os': 'Linux', 'port': '22', 'status': 'Running', 'location': 'building-a'},
 'host-b': {'os': 'Linux', 'port': '22', 'status': 'Running', 'location': 'building-a'},
 'host-c': {'os': 'Linux', 'port': '22', 'status': 'Running', 'location': 'building-a'}}

回答1:

You'll need to use the recursive argument to the combine filter, like this:

- hosts: localhost
  gather_facts: false
  vars:
    my_dict:
      host-a: {'os': 'Linux', 'port': '22', 'status': 'Running'}
      host-b: {'os': 'Linux', 'port': '22', 'status': 'Running'}
      host-c: {'os': 'Linux', 'port': '22', 'status': 'Running'}

  tasks:
    - name: update dict
      set_fact:
        my_dict: "{{ my_dict|combine({item: {'location': 'building-a'}}, recursive=true) }}"
      loop: "{{ my_dict|list }}"

    - debug:
        var: my_dict

The above playbook will output:


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

TASK [update dict] ***********************************************************************************************************************************************************
ok: [localhost] => (item=host-a)
ok: [localhost] => (item=host-b)
ok: [localhost] => (item=host-c)

TASK [debug] *****************************************************************************************************************************************************************
ok: [localhost] => {
    "my_dict": {
        "host-a": {
            "location": "building-a",
            "os": "Linux",
            "port": "22",
            "status": "Running"
        },
        "host-b": {
            "location": "building-a",
            "os": "Linux",
            "port": "22",
            "status": "Running"
        },
        "host-c": {
            "location": "building-a",
            "os": "Linux",
            "port": "22",
            "status": "Running"
        }
    }
}

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

来源：https://stackoverflow.com/questions/59363779/ansible-loop-and-update-dict

标签

python

loops

dictionary

ansible

ansible-2.x