Ansible 列印調試消息結果變數

我有一個簡單的任務，我無法克服。

我有一個返回 AWS EC2 實例配置的劇本。我只需要列印（顯示）private_ip_address。

這是我的劇本

---
- hosts: local
 connection: local
 gather_facts: false
 become: yes
 become_method: enable

 tasks:

 - name: gather-info-ec2
   community.aws.ec2_instance_info:
     instance_ids:
       - i-XXXXXAAAAAA

   register: ec2

 - debug: msg="{{ ec2.instances.network_interfaces.private_ip_address }}"

當我像這樣執行它時，我收到以下錯誤。

fatal: [localhost]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'list object' has no attribute 'network_interfaces'\n\nThe error appears to be in '/etc/ansible/playbooks/AWSLinuxMigration/gather_ec2_info.yaml': line 16, column 5, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n  - debug: msg=\"{{ ec2.instances.network_interfaces.private_ip_address }}\"\n    ^ here\nWe could be wrong, but this one looks like it might be an issue with\nmissing quotes. Always quote template expression brackets when they\nstart a value. For instance:\n\n    with_items:\n      - {{ foo }}\n\nShould be written as:\n\n    with_items:\n      - \"{{ foo }}\"\n"}

當我在沒有 DEBUG 部分並使用**-vvv**的情況下執行它時，它會顯示以下結果。如何提取並列印此地址？我把它縮短了一點，但你明白了

ok: [localhost] => {
   "msg": {
       "changed": false,
       "failed": false,
       "instances": [
           {
               "ami_launch_index": 0,
               "architecture": "x86_64",
               "block_device_mappings": [
                   {
                       "device_name": "/dev/xvda",
                       "ebs": {
                           "attach_time": "2020-04-15T16:11:19+00:00",
                           "delete_on_termination": true,
                           "status": "attached",
                           "volume_id": "xxxxxx"
                       }
                   }
               ],
               "capacity_reservation_specification": {
                   "capacity_reservation_preference": "open"
               },
               "client_token": "",
               "cpu_options": {
                   "core_count": 1,
                   "threads_per_core": 2
               },
               "ebs_optimized": true,
               "ena_support": true,
               "enclave_options": {
                   "enabled": false
               },
               "hibernation_options": {
                   "configured": false
               },
               "hypervisor": "xen",
               "iam_instance_profile": {
                   "arn": "xxxxxx",
                   "id": "xxxxxx"
               },
               "image_id": "xxxxx",
               "instance_id": "xxxxx",
               "instance_type": "t3.medium",
               "key_name": "xxxxx",
               "launch_time": "2021-04-21T00:01:25+00:00",
               "metadata_options": {
                   "http_endpoint": "enabled",
                   "http_put_response_hop_limit": 1,
                   "http_tokens": "optional",
                   "state": "applied"
               },
               "monitoring": {
                   "state": "disabled"
               },
               "network_interfaces": [
                   {
                       "association": {
                           "ip_owner_id": "xxxx",
                           "public_dns_name": "xxxxx",
                           "public_ip": "xxxx"
                       },
                       "attachment": {
                           "attach_time": "2020-04-15T16:11:18+00:00",
                           "attachment_id": "xxxxx",
                           "delete_on_termination": true,
                           "device_index": 0,
                           "network_card_index": 0,
                           "status": "attached"
                       },
                       "description": "Primary network interface",
                       "groups": [
                           {
                               "group_id": "xxxxx",
                               "group_name": "xxxxx"
                           }
                       ],
                       "interface_type": "interface",
                       "ipv6_addresses": [],
                       "mac_address": "xxxxx",
                       "network_interface_id": "xxxx",
                       "owner_id": "xxxxx",
                       "private_dns_name": "ip-10-0-1-161.ec2.internal",
                       "private_ip_address": "10.0.1.161",
                       "private_ip_addresses": [
                           {
                               "association": {
                                   "ip_owner_id": "xxxxx",
                                   "public_dns_name": "xxxx.compute-1.amazonaws.com",
                                   "public_ip": "2.2.2.2"
                               },
                               "primary": true,
                               "private_dns_name": "ip-333333.ec2.internal",
                               "private_ip_address": "1.1.1.1."
                           }
                       ],
                       "source_dest_check": true,
                       "status": "in-use"

                   }
               ]
       ]
   }
}

屬性實例和網路介面都是列表。使用json_query，例如

   - debug:
       msg: "{{ ec2.instances|
                json_query('[].network_interfaces[].private_ip_address') }}"

結果也將是一個列表，因為可能有更多的網路介面和更多的地址。在您的情況下，您可能想要選擇第一個，例如

   - debug:
       msg: "{{ ec2.instances|
                json_query('[].network_interfaces[].private_ip_address')|
                first }}"

引用自：https://serverfault.com/questions/1066943