在使用Ansible管理ACI时，如果要使用变量，请确保变量值不包含任何特殊字符，如逗号、冒号、反斜杠等。否则，您将会得到以下错误信息：

An unhandled exception occurred while running the lookup plugin 'aci_rest'
Error was a , BaseResponse({'totalCount': '1', 'imdata': [{'error': {'attributes': {'code': '400', 'text': 'Bad Request: Incorrect JSON format'}}}]})`

以下是在ACI上使用Ansible时避免此错误的示例代码：

vars:
  tenant_name: my_tenant
  contract_name: my_contract
  filter_name: my_filter
  filter_entries:
    - { name: 'entry1', ether_type: 'ipv4', action: 'deny', arp_opcode: 'unspecified', dest_from: '', dest_to: '', source_from: '', source_to: '', dport_from: '', dport_to: '', sport_from: '', sport_to: ''}

tasks:
  - name: Create Tenant
    aci_rest:
      host: "{{ aci_host }}"
      username: "{{ aci_username }}"
      password: "{{ aci_password }}"
      method: post
      path: /api/mo/uni.json
      content: "{{ lookup('template', 'aci/create_tenant.j2') }}"
    register: tenant_result

  - name: Create Contract
    aci_rest:
      host: "{{ aci_host }}"
      username: "{{ aci_username }}"
      password: "{{ aci_password }}"
      method: post
      path: /api/mo/uni.json
      content: "{{ lookup('template', 'aci/create_contract.j2') }}"
    register: contract_result

  - name: Create Filter Entries
    aci_rest:
      host: "{{ aci_host }}"
      username: "{{ aci_username }}"
      password: "{{ aci_password }}"
      method: post
      path: /api/mo/uni.json
      content: "{{ lookup('template', 'aci/create_filter_entries.j2') }}"
    register: filter_entries_result

在这个