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Accepted
Raj R
Asked: 2022-02-16 06:08:35 +0800 CST

Not able to list all the images

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I am trying to list all the images which has the name Ansible*.

If i can pull it off, i can use it to clean my AMI's that are created during patching activity. i am trying it via SSM Automation Document. below is the code i have.

description: This document is to remove AMI
schemaVersion: '0.3'
assumeRole: '{{ AutomationAssumeRole }}'
mainSteps:
  - name: getImageId
    action: 'aws:executeAwsApi'
    inputs:
      Service: ec2
      Api: DescribeImages
      Filters:
        - Name: 'name'
          Values:
            - 'Ansible*'
    outputs:
      - Name: ImageId
        Selector: '$.Images[0].ImageId'
        Type: String

here, Selector: '$.Images[0].ImageId' gives only the 1st image id of the list. i can get it if i can give something like Selector: '$.Images[*].ImageId' but this is not supported by the SSM document.

could someone please help me on this. all i want is, i want to list all the images with its AMI ID.

PS: i have the shell and python script which does the job,. but i am looking for AWS SSM Automation document due to roles and policy restrictions

awstats amazon-web-services aws-cli aws-systems-manager

1 Answers

  1. Best Answer

    From some quick testing I'm not sure you can.

    You can do this on the CLI though, so perhaps you can use the boto3 library and do it as a Python script via the executeScript automation?

    CLI command that works:

    aws ec2 describe-images --owners amazon --filters "Name=name,Values=amzn*" --query 'Images[*].Name' --output json

    Update:

    Here's an automation doc that runs the python script:

    description: Gets all Amazon-owned AMIs.
schemaVersion: '0.3'
assumeRole: '{{ AutomationAssumeRole }}'
mainSteps:
  - name: GetAMIs
    action: 'aws:executeScript'
    inputs:
      Runtime: python3.6
      Handler: script_handler
      Script: |-
        import boto3
        import json
        def script_handler(events, context):
          ec2_client = boto3.client('ec2', region_name='eu-west-2')
          images = ec2_client.describe_images(Owners=['amazon'],Filters=[{'Name':'name','Values':['amzn*']}])
          amis = []
          for image in images['Images']:
            amis.append(image['ImageId'])
          output = {"AMIs": amis[:10]}
          return output
    description: gets first 10 Amazon AMIs using boto3
    outputs:
      - Selector: $.Payload.AMIs
        Name: AMIs
        Type: StringList
    timeoutSeconds: 120

    Be sure to change things like region, search string, etc.

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