#!/bin/bash

export_dir="/root/dockerimages"

mkdir -p "$export_dir"

docker images --format "{{.Repository}}:{{.Tag}}" | while read image; do
    repo=$(echo "$image" | cut -d: -f1| tr '/' '_')
    tag=$(echo "$image" | cut -d: -f2| tr '/' '_')

    docker save -o "$export_dir/$repo-$tag.tar" "$image"
done