docker save with a progress bar

docker_save_progress_bar.sh

# If you're impatient like me, a progress bar can be a comforting way to impulsively check the progress
# of your docker save command
#
# You'll need tqdm installed (https://github.com/tqdm/tqdm) for this to work.

docker save IMAGE_NAME | tqdm --bytes --total $(docker image inspect IMAGE_NAME --format='{{.Size}}') > OUTPUT_TAR_NAME

works with docker commit as well. +1

Great script, really helpful! 👍
I created a snippet that includes a Dockerized version of tqdm and gzip, for better file size and portability.

#!/usr/bin/env bash

DOCKER_IMAGE=python:3.13.0-alpine3.20
DOCKER_IMAGE_SIZE=$(docker image inspect "${DOCKER_IMAGE}" --format='{{.Size}}')
OUTPUT_FILE='/tmp/image.tgz'

docker save ${DOCKER_IMAGE} |
  docker run --rm -i tqdm/tqdm:latest --bytes --total ${DOCKER_IMAGE_SIZE} |
  gzip >${OUTPUT_FILE}