Initial commit: add .gitignore and README

fix-docker-dns.sh

@@ -0,0 +1,135 @@
+#!/bin/bash
+
+# Fix Docker DNS resolution issues in WSL2
+# This script addresses the "dial tcp: lookup registry-1.docker.io" error
+
+set -e
+
+echo "=========================================="
+echo "Docker DNS Fix for WSL2"
+echo "=========================================="
+
+# Check if running as root
+if [ "$EUID" -ne 0 ]; then 
+    echo "Please run as root or with sudo"
+    echo "Usage: sudo ./fix-docker-dns.sh"
+    exit 1
+fi
+
+# Step 1: Fix WSL2 DNS resolution
+echo ""
+echo "Step 1: Configuring WSL2 DNS..."
+if [ ! -f /etc/wsl.conf ]; then
+    echo "Creating /etc/wsl.conf..."
+    cat > /etc/wsl.conf <<EOF
+[network]
+generateResolvConf = false
+EOF
+fi
+
+# Backup existing resolv.conf
+if [ -f /etc/resolv.conf ]; then
+    cp /etc/resolv.conf /etc/resolv.conf.backup.$(date +%Y%m%d_%H%M%S)
+fi
+
+# Create new resolv.conf with reliable DNS servers
+echo "Updating /etc/resolv.conf with reliable DNS servers..."
+cat > /etc/resolv.conf <<EOF
+# DNS configuration for WSL2
+# Generated by fix-docker-dns.sh
+
+nameserver 8.8.8.8
+nameserver 8.8.4.4
+nameserver 1.1.1.1
+nameserver 10.255.255.254
+EOF
+
+chattr +i /etc/resolv.conf 2>/dev/null || echo "Note: chattr not available, resolv.conf may be regenerated"
+
+# Step 2: Configure Docker daemon DNS
+echo ""
+echo "Step 2: Configuring Docker daemon DNS..."
+
+# Check if Docker Desktop is being used (common in WSL2)
+if command -v docker &> /dev/null; then
+    DOCKER_CONTEXT=$(docker context show 2>/dev/null || echo "default")
+    echo "Docker context: $DOCKER_CONTEXT"
+fi
+
+# Create Docker daemon.json directory if it doesn't exist
+mkdir -p /etc/docker
+
+# Backup existing daemon.json if it exists
+if [ -f /etc/docker/daemon.json ]; then
+    cp /etc/docker/daemon.json /etc/docker/daemon.json.backup.$(date +%Y%m%d_%H%M%S)
+    echo "Backed up existing daemon.json"
+fi
+
+# Create or update daemon.json with DNS configuration
+echo "Creating/updating /etc/docker/daemon.json..."
+cat > /etc/docker/daemon.json <<EOF
+{
+  "dns": ["8.8.8.8", "8.8.4.4", "1.1.1.1"],
+  "log-driver": "json-file",
+  "log-opts": {
+    "max-size": "10m",
+    "max-file": "3"
+  }
+}
+EOF
+
+# Step 3: Restart Docker service (if systemd is available)
+echo ""
+echo "Step 3: Restarting Docker service..."
+if systemctl is-active --quiet docker 2>/dev/null; then
+    echo "Restarting Docker daemon..."
+    systemctl restart docker
+    echo "Waiting for Docker to be ready..."
+    sleep 5
+elif command -v docker &> /dev/null; then
+    echo "Docker Desktop detected. Please restart Docker Desktop manually."
+    echo "Or run: wsl --shutdown (from Windows PowerShell) and restart WSL"
+fi
+
+# Step 4: Test DNS resolution
+echo ""
+echo "Step 4: Testing DNS resolution..."
+echo "Testing registry-1.docker.io resolution..."
+if nslookup registry-1.docker.io > /dev/null 2>&1; then
+    echo "✓ DNS resolution working!"
+else
+    echo "⚠ DNS resolution still failing. Trying alternative approach..."
+    # Try with dig if available
+    if command -v dig &> /dev/null; then
+        dig registry-1.docker.io +short || echo "Still failing"
+    fi
+fi
+
+# Step 5: Test Docker connectivity
+echo ""
+echo "Step 5: Testing Docker connectivity..."
+if command -v docker &> /dev/null; then
+    echo "Testing Docker pull (dry-run)..."
+    if docker pull hello-world:latest > /dev/null 2>&1; then
+        echo "✓ Docker connectivity working!"
+    else
+        echo "⚠ Docker pull test failed. This might be normal if images are already cached."
+    fi
+fi
+
+echo ""
+echo "=========================================="
+echo "Fix completed!"
+echo "=========================================="
+echo ""
+echo "Next steps:"
+echo "1. If using Docker Desktop, restart it from Windows"
+echo "2. Or restart WSL: wsl --shutdown (from Windows PowerShell)"
+echo "3. Try running your Quorum network again: ./run.sh"
+echo ""
+echo "If issues persist, try:"
+echo "  - Check Windows firewall settings"
+echo "  - Verify internet connectivity"
+echo "  - Check Docker Desktop settings for network configuration"
+echo ""
+