Export the final filesystem of a docker image into a directory

export-docker-image.sh

#!/bin/sh -e

# Function to display help message
show_help() {
    echo "Usage: $0 <image_name> <destination_path>"
    echo ""
    echo "  image_name        The name of the Docker image."
    echo "  destination_path  The path on your host system where you want to save the filesystem of the image."
}

# Check if the correct number of arguments is provided
if [ "$#" -ne 2 ]; then
    show_help
    exit 1
fi

IMAGE_NAME=$1
DESTINATION_PATH=$2

mkdir -p "$DESTINATION_PATH"

# Create a temporary container from the image
docker create --name temp_container $IMAGE_NAME

# Export the filesystem contents to a tar file using docker export -o
docker export $(docker ps -aqf "name=temp_container") | tar -C $DESTINATION_PATH -xf -

# Remove the temporary container
docker rm temp_container

echo "Image filesystem contents exported to ${DESTINATION_PATH}"