download_images.sh

scripts/shell_scripts/download_images.sh

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+#!/bin/bash
+# Script to download and package Docker images for offline use
+# Run this on a machine with good Docker Hub access, then transfer images.tar to China
+
+set -e
+
+echo "=== Docker Image Downloader for Offline Use ==="
+echo ""
+
+# Images needed
+IMAGES=(
+    "node:20-alpine"
+    "python:3.12-slim"
+    "postgres:16-alpine"
+    "nginx:alpine"
+)
+
+OUTPUT_FILE="images.tar"
+
+echo "Pulling Docker images..."
+for img in "${IMAGES[@]}"; do
+    echo "  Pulling $img..."
+    docker pull "$img"
+done
+
+echo ""
+echo "Saving to $OUTPUT_FILE..."
+docker save "${IMAGES[@]}" -o "$OUTPUT_FILE"
+
+echo ""
+echo "Done! File size:"
+ls -lh "$OUTPUT_FILE"
+
+echo ""
+echo "To transfer to China machine and load:"
+echo "  scp images.tar user@china-machine:/path/"
+echo "  docker load < images.tar"