entrypoint.sh

#!/bin/bash
set -e

echo "Starting DeviceLab Appium Test Node..."
echo "DeviceLab URL: $DEVICELAB_URL"
echo "APK Path: /root/Downloads/app-release.apk"
echo "Test Node Port: $TEST_NODE_PORT"
echo "Network Mode: ${NETWORK_MODE:-bridge}"

# Network diagnostics and optimization for WebRTC/UDP in Docker
echo ""
echo "========================================="
echo "Network Configuration and Diagnostics"
echo "========================================="

# Display current network buffer sizes
echo "Initial UDP buffer sizes:"
echo "  rmem_default: $(cat /proc/sys/net/core/rmem_default 2>/dev/null || echo 'N/A') bytes"
echo "  wmem_default: $(cat /proc/sys/net/core/wmem_default 2>/dev/null || echo 'N/A') bytes"
echo "  rmem_max: $(cat /proc/sys/net/core/rmem_max 2>/dev/null || echo 'N/A') bytes"
echo "  wmem_max: $(cat /proc/sys/net/core/wmem_max 2>/dev/null || echo 'N/A') bytes"
echo "  netdev_max_backlog: $(cat /proc/sys/net/core/netdev_max_backlog 2>/dev/null || echo 'N/A')"

# Apply network optimizations for WebRTC/UDP
echo ""
echo "Applying network optimizations for WebRTC/UDP..."

# Increase UDP buffer sizes (critical for WebRTC)
sysctl -w net.core.rmem_default=1048576 2>/dev/null || echo "  Warning: Could not set rmem_default (may need privileged mode)"
sysctl -w net.core.wmem_default=1048576 2>/dev/null || echo "  Warning: Could not set wmem_default (may need privileged mode)"
sysctl -w net.core.rmem_max=2097152 2>/dev/null || echo "  Warning: Could not set rmem_max (may need privileged mode)"
sysctl -w net.core.wmem_max=2097152 2>/dev/null || echo "  Warning: Could not set wmem_max (may need privileged mode)"
sysctl -w net.core.netdev_max_backlog=5000 2>/dev/null || echo "  Warning: Could not set netdev_max_backlog"

# UDP specific settings
sysctl -w net.ipv4.udp_rmem_min=8192 2>/dev/null || true
sysctl -w net.ipv4.udp_wmem_min=8192 2>/dev/null || true

# MTU and fragmentation settings
sysctl -w net.ipv4.tcp_mtu_probing=1 2>/dev/null || true
sysctl -w net.ipv4.ip_no_pmtu_disc=0 2>/dev/null || true

# Connection tracking settings for UDP (if available)
sysctl -w net.netfilter.nf_conntrack_udp_timeout=300 2>/dev/null || true
sysctl -w net.netfilter.nf_conntrack_udp_timeout_stream=300 2>/dev/null || true
sysctl -w net.netfilter.nf_conntrack_max=65536 2>/dev/null || true
sysctl -w net.netfilter.nf_conntrack_generic_timeout=300 2>/dev/null || true

# Display updated buffer sizes
echo ""
echo "Updated UDP buffer sizes:"
echo "  rmem_default: $(cat /proc/sys/net/core/rmem_default 2>/dev/null || echo 'N/A') bytes ($(( $(cat /proc/sys/net/core/rmem_default 2>/dev/null || echo 0) / 1024 )) KB)"
echo "  wmem_default: $(cat /proc/sys/net/core/wmem_default 2>/dev/null || echo 'N/A') bytes ($(( $(cat /proc/sys/net/core/wmem_default 2>/dev/null || echo 0) / 1024 )) KB)"
echo "  rmem_max: $(cat /proc/sys/net/core/rmem_max 2>/dev/null || echo 'N/A') bytes ($(( $(cat /proc/sys/net/core/rmem_max 2>/dev/null || echo 0) / 1024 )) KB)"
echo "  wmem_max: $(cat /proc/sys/net/core/wmem_max 2>/dev/null || echo 'N/A') bytes ($(( $(cat /proc/sys/net/core/wmem_max 2>/dev/null || echo 0) / 1024 )) KB)"

# Network interface information
echo ""
echo "Network interfaces:"
ip addr show 2>/dev/null | grep -E "^[0-9]+:|inet " || ifconfig 2>/dev/null || echo "Could not get network interfaces"

# MTU information
echo ""
echo "MTU settings:"
ip link show | grep -E "^[0-9]+:|mtu" 2>/dev/null || echo "Could not get MTU information"

# Check for host network mode advantages
if [ "${NETWORK_MODE}" = "host" ]; then
    echo ""
    echo "✅ Running in HOST network mode - optimal for WebRTC/UDP performance"
else
    echo ""
    echo "⚠️  Running in BRIDGE network mode - may experience WebRTC/UDP issues"
    echo "   Consider using 'network-mode: host' for better performance"
fi

# Initial network statistics
echo ""
echo "Initial network statistics:"
netstat -su 2>/dev/null | grep -A 10 "Udp:" | head -15 || echo "Could not get UDP statistics"

echo "========================================="
echo ""

# Check if APK exists
if [ ! -f "/root/Downloads/app-release.apk" ]; then
    echo "Error: APK file not found at /root/Downloads/app-release.apk"
    exit 1
fi

# Display APK info
apk_size=$(stat -c%s "/root/Downloads/app-release.apk")
echo "APK Size: $(numfmt --to=iec $apk_size)"

# Function to monitor network stats in background
monitor_network_stats() {
    local log_file="/var/log/network_monitor.log"
    echo "[Network Monitor] Started at $(date)" > "$log_file"
    
    while true; do
        sleep 60
        {
            echo ""
            echo "[Network Monitor] $(date '+%Y-%m-%d %H:%M:%S')"
            echo "----------------------------------------"
            
            # UDP statistics
            echo "UDP Statistics:"
            netstat -su 2>/dev/null | grep -A 10 "Udp:" | grep -E "packets|errors|buffer" || true
            
            # Connection tracking (if available)
            if command -v conntrack &> /dev/null; then
                echo ""
                echo "UDP Connection Tracking (top 5):"
                conntrack -L 2>/dev/null | grep udp | head -5 || true
                echo "Total UDP connections: $(conntrack -L 2>/dev/null | grep -c udp || echo 0)"
            fi
            
            # Network errors
            echo ""
            echo "Network Interface Errors:"
            ip -s link 2>/dev/null | grep -A 1 "errors" | head -10 || true
            
            echo "----------------------------------------"
        } >> "$log_file" 2>&1
    done
}

# Create log directory
mkdir -p /var/log

# Start network monitoring in background (non-blocking)
if [ "${ENABLE_NETWORK_MONITOR:-true}" = "true" ]; then
    monitor_network_stats &
    MONITOR_PID=$!
    echo "Started network monitoring (PID: $MONITOR_PID, Log: /var/log/network_monitor.log)"
fi

# Download and execute DeviceLab script
echo ""
echo "Downloading and executing DeviceLab script..."
exec curl -fsSL "$DEVICELAB_URL" | sh -s -- --framework appium --app /root/Downloads/app-release.apk