Manual Docker image download with curl

JasmondL · July 14, 2023, 2:40pm

Using Curl pulling image

Describe your question in as much detail as possible:

What are you seeing, and how does it differ from what you expect to see?
Is it possible to pull docker image from GitLab’s repository using curl?

Moby has a script that allows others to pull image without installing docker suite.

moby/moby/blob/master/contrib/download-frozen-image-v2.sh

#!/usr/bin/env bash
set -eo pipefail

# hello-world                      latest              ef872312fe1b        3 months ago        910 B
# hello-world                      latest              ef872312fe1bbc5e05aae626791a47ee9b032efa8f3bda39cc0be7b56bfe59b9   3 months ago        910 B

# debian                           latest              f6fab3b798be        10 weeks ago        85.1 MB
# debian                           latest              f6fab3b798be3174f45aa1eb731f8182705555f89c9026d8c1ef230cbf8301dd   10 weeks ago        85.1 MB

# check if essential commands are in our PATH
for cmd in curl jq; do
	if ! command -v $cmd &> /dev/null; then
		echo >&2 "error: \"$cmd\" not found!"
		exit 1
	fi
done

usage() {
	echo "usage: $0 dir image[:tag][@digest] ..."
	echo "       $0 /tmp/old-hello-world hello-world:latest@sha256:8be990ef2aeb16dbcb9271ddfe2610fa6658d13f6dfb8bc72074cc1ca36966a7"

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Furthermore, docker also provided API for docker pull.

While I can’t find any “pull” endpoint from Gitlab.
Are there any examples from gitlab I can adopt?

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Manual Docker image download with curl

Using Curl pulling image

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