使用Ansible查询AWS EC2 AMI时遍历结果报错求助

Let's walk through fixing your playbook step by step. I see a couple of key issues that are causing the loop error:

1. Replace Deprecated Module #

The ec2_ami_facts module is deprecated and no longer actively maintained. You should switch to the newer amazon.aws.ec2_ami_info module from the Amazon AWS collection. First, make sure you have the collection installed if you haven't already:

ansible-galaxy collection install amazon.aws

2. Fix Loop Syntax & JSON Query #

Your loop has unnecessary extra spaces around the Jinja2 expression, which causes Ansible to treat the result as a string instead of a list. Additionally, we can simplify the JSON query to combine your two filters into one for better readability and efficiency.

Here's the corrected playbook:

- hosts: localhost
  tasks:
    - name: Get Amazon Linux AMIs
      amazon.aws.ec2_ami_info:
        owner: amazon
        filters:
          architecture: x86_64
          root-device-type: ebs
      register: amis

    - name: Return filtered AMI data
      debug:
        msg: "{{ item }}"
      loop: "{{ amis | json_query('Images[?Description!=`null` && starts_with(Description, `Amazon Linux`)]') }}"

Key Fixes Explained: #

• Removed extra spaces in the loop value: The original had " {{ ... }} " which added unnecessary whitespace. Now it's {{ ... }} directly, ensuring Ansible interprets it as a list of AMI objects.
• Combined JSON query filters: Instead of two separate pipe-separated filters, we use && to check both conditions (non-null description and starts with "Amazon Linux") in one go.
• Updated module: amazon.aws.ec2_ami_info is the officially supported replacement for the old ec2_ami_facts module.

3. Extracting Just Image IDs #

Once the loop works correctly, you can modify the task to return only the image IDs by adjusting the msg field:

- name: Return filtered AMI IDs
  debug:
    msg: "{{ item.ImageId }}"
  loop: "{{ amis | json_query('Images[?Description!=`null` && starts_with(Description, `Amazon Linux`)]') }}"

Alternatively, you can use JSON query to extract the IDs directly in the loop, making the debug task simpler:

- name: Return filtered AMI IDs
  debug:
    msg: "{{ item }}"
  loop: "{{ amis | json_query('Images[?Description!=`null` && starts_with(Description, `Amazon Linux`)].ImageId') }}"

Testing the Query #

If you want to verify the JSON query returns the expected list before looping, add a debug task to print the raw query result:

- name: Print filtered AMIs list
  debug:
    var: amis | json_query('Images[?Description!=`null` && starts_with(Description, `Amazon Linux`)]')

This should resolve your loop error and give you the filtered AMI data you need.

内容的提问来源于stack exchange，提问作者Neil H Watson