Docker Image Pull Size

This tool helps you estimate how much data will be used when pulling a sequence of images and caching layers.

This is a super early prototype and mostly for my own use!

Usage

# python3 image_pull_size.py image1 image2 ...
python3 image_pull_size.py python:3.8 python:3.7 my/app

The arch (amd64, arm64) can be provided using the --arch flag.

The output will contain a trace of the total size and number of layers accumulated by the provided sequence of pulls.

• name. Name of image pulled at this step.
• size_total. Total accumulated size.
• size_total_pct. Total accumulated size as percentage of final accumulated size.
• size_delta. Size of new layers in this pull.
• size_delta_pct. Size of new layers in this pull as percentage of final accumulated size.
• layers_total. Total accumulated number of layers.
• layers_delta. New layers in this pull.