How To Get Lastest Image Version in AWS ECR

- A python script to get latet image version of application from ECR.

- In some case, developers want to know the latest image version of application such master branch for deploying to staging and product.

- We can provide to them a tool (slackbot, ChatOps, etc.) to call the script.

What’s In This Document

• Get application code
• Run test
• A practice to use this script

🚀 Get application code

• Get latest image version of master branch from ECR with prefix master- and lastest pushed at

import boto3

import re

def get_latest_master_image():

    """ Filter images with prefix master- and return the latest pushed one """

    client = boto3.client('ecr', region_name='ap-southeast-1')

    response = client.list_images(

        registryId='111111111111',

        repositoryName='repo/application',

        maxResults=1000

    )

latest = None
temp_tag = None

for image in response['imageIds']:
    tag = image['imageTag']
    if re.search("^master-[0-9]+", tag):
        img = client.describe_images(
            registryId='111111111111',
            repositoryName='repo/application',
            imageIds=[
                {
                    'imageTag': tag
                },
            ]
        )
        pushed_at = img['imageDetails'][0]['imagePushedAt']
        if latest is None:
            latest = pushed_at
        else:
            if latest < pushed_at:
                latest = pushed_at
                temp_tag = tag
return temp_tag, latest



    

    




version, pushed_at = get_latest_master_image()

print(f'app {version} pushed at {pushed_at}')

🚀 Run test

⚡ $ python getImageVersion.py 

app master-12163 pushed at 2020-12-31 10:10:53+07:00

🚀 A practice to use this script

• Using slackbot

Mirror:

• https://github.com/vumdao/get-ecr
• https://vumdao.hashnode.dev/how-to-get-lastest-image-version-in-aws-ecr

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