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ip -a
# 显示ens网卡状态UP，已获得IP地址192.168.1.2/24

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nmtui
# 执行nmtui,缺少网卡配置且无法配置

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nmcli
# 显示ens网卡设备状态显示"unmanaged"

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#!/bin/bash

# 通用网络服务迁移到NetworkManager脚本
set -e

echo "=================================================="
echo "   通用网络服务迁移到NetworkManager"
echo "=================================================="

RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m'

log_info() { echo -e "${GREEN}[INFO]${NC} $1"; }
log_warn() { echo -e "${YELLOW}[WARN]${NC} $1"; }
log_error() { echo -e "${RED}[ERROR]${NC} $1"; }
log_debug() { echo -e "${BLUE}[DEBUG]${NC} $1"; }

# 检测系统类型
detect_os() {
    if [ -f /etc/os-release ]; then
        . /etc/os-release
        OS_NAME=$ID
        OS_VERSION=$VERSION_ID
    else
        log_error "无法检测操作系统类型"
        exit 1
    fi
    
    log_info "检测到操作系统: $OS_NAME $OS_VERSION"
}

# 检查并安装NetworkManager
install_networkmanager() {
    log_info "检查NetworkManager安装状态..."
    
    if command -v nmcli >/dev/null 2>&1 && systemctl list-unit-files | grep -q NetworkManager; then
        log_info "NetworkManager 已安装"
        return 0
    fi
    
    log_warn "NetworkManager 未安装，开始安装..."
    
    case $OS_NAME in
        ubuntu|debian)
            export DEBIAN_FRONTEND=noninteractive
            apt-get update
            apt-get install -y network-manager
            ;;
        centos|rhel|fedora|rocky|alma)
            if command -v dnf >/dev/null 2>&1; then
                dnf install -y NetworkManager
            else
                yum install -y NetworkManager
            fi
            ;;
        opensuse*|sles)
            zypper install -y NetworkManager
            ;;
        arch)
            pacman -Sy --noconfirm networkmanager
            ;;
        *)
            log_error "不支持的操作系统: $OS_NAME"
            exit 1
            ;;
    esac
    
    # 验证安装
    if command -v nmcli >/dev/null 2>&1; then
        log_info "✅ NetworkManager 安装成功"
    else
        log_error "❌ NetworkManager 安装失败"
        exit 1
    fi
}

# 检查NetworkManager服务状态
check_networkmanager_service() {
    log_info "检查NetworkManager服务状态..."
    
    if ! systemctl is-enabled NetworkManager >/dev/null 2>&1; then
        log_warn "NetworkManager 服务未启用，正在启用..."
        systemctl enable NetworkManager
    fi
    
    if systemctl is-active NetworkManager >/dev/null 2>&1; then
        log_info "NetworkManager 服务正在运行"
    else
        log_warn "NetworkManager 服务未运行，正在启动..."
        systemctl start NetworkManager
    fi
}

# 获取所有网络接口
get_network_interfaces() {
    ip -o link show | awk -F': ' '{print $2}' | grep -E '^(ens|eth|enp|eno|wlan|wlp)' | grep -v lo
}

# 备份现有网络配置
backup_network_config() {
    log_info "备份网络配置..."
    local backup_dir="/etc/network_backup_$(date +%Y%m%d_%H%M%S)"
    mkdir -p "$backup_dir"
    
    log_info "创建备份目录: $backup_dir"
    
    # 备份各种网络配置
    [ -f /etc/network/interfaces ] && cp /etc/network/interfaces "$backup_dir/" && log_debug "备份了 /etc/network/interfaces"
    [ -d /etc/netplan ] && cp -r /etc/netplan "$backup_dir/" && log_debug "备份了 /etc/netplan"
    [ -d /etc/sysconfig/network-scripts ] && cp -r /etc/sysconfig/network-scripts "$backup_dir/" && log_debug "备份了 /etc/sysconfig/network-scripts"
    [ -d /etc/NetworkManager ] && cp -r /etc/NetworkManager "$backup_dir/systemd_NetworkManager_backup" && log_debug "备份了 /etc/NetworkManager"
    
    # 备份当前网络状态
    ip addr show > "$backup_dir/ip_addr.txt"
    ip route show > "$backup_dir/ip_route.txt"
    cat /etc/resolv.conf > "$backup_dir/resolv.conf.txt" 2>/dev/null || true
    
    # 备份服务状态
    systemctl list-units --type=service | grep -E '(network|NetworkManager|netplan)' > "$backup_dir/services.txt" 2>/dev/null || true
    
    log_info "网络配置已备份到: $backup_dir"
    echo "$backup_dir"
}

# 收集当前网络配置信息
collect_current_network_config() {
    log_info "收集当前网络配置..."
    
    declare -gA interface_configs
    local interfaces=$(get_network_interfaces)
    
    if [ -z "$interfaces" ]; then
        log_warn "未找到物理网络接口，尝试列出所有接口..."
        interfaces=$(ip -o link show | awk -F': ' '{print $2}' | grep -v lo)
    fi
    
    for iface in $interfaces; do
        log_info "分析接口: $iface"
        
        # 获取接口MAC地址
        local mac_addr=$(ip link show "$iface" | grep -oP 'link/ether \K[0-9a-f:]+' | head -1)
        
        # 获取IP地址信息
        local ipv4_info=$(ip -4 addr show dev "$iface" | grep inet | head -1)
        local ipv6_info=$(ip -6 addr show dev "$iface" | grep inet6 | head -1)
        
        # 获取路由信息
        local gateway=$(ip route show default dev "$iface" 2>/dev/null | awk '/default/ {print $3}' | head -1)
        if [ -z "$gateway" ]; then
            gateway=$(ip route show default | awk '/default/ {print $3}' | head -1)
        fi
        
        # 获取DNS信息
        local dns_servers=$(grep nameserver /etc/resolv.conf 2>/dev/null | awk '{print $2}' | tr '\n' ' ' | sed 's/ $//')
        
        # 存储配置信息
        interface_configs["${iface}_mac"]="$mac_addr"
        interface_configs["${iface}_ipv4"]="$ipv4_info"
        interface_configs["${iface}_ipv6"]="$ipv6_info"
        interface_configs["${iface}_gateway"]="$gateway"
        interface_configs["${iface}_dns"]="$dns_servers"
        interface_configs["${iface}_state"]=$(ip link show "$iface" | grep -q "state UP" && echo "up" || echo "down")
        
        log_info "接口 $iface 状态: ${interface_configs["${iface}_state"]}"
        [ -n "$mac_addr" ] && log_debug "接口 $iface MAC: $mac_addr"
        [ -n "$ipv4_info" ] && log_info "接口 $iface IPv4: $ipv4_info"
        [ -n "$ipv6_info" ] && log_debug "接口 $iface IPv6: $ipv6_info"
        [ -n "$gateway" ] && log_info "接口 $iface 网关: $gateway"
        [ -n "$dns_servers" ] && log_info "接口 $iface DNS: $dns_servers"
    done
}

# 1. 停止所有网络服务
stop_all_network_services() {
    log_info "停止所有网络服务..."
    
    # 停止并禁用所有可能的网络管理服务
    services="systemd-networkd networking NetworkManager netplan"
    
    for service in $services; do
        if systemctl is-active --quiet $service 2>/dev/null; then
            systemctl stop $service
            systemctl disable $service
            log_info "已停止: $service"
        fi
    done
    
    # 确保没有残留进程
    pkill -f dhclient || true
    pkill -f wpa_supplicant || true
    sleep 2
}

# 2. 清理网络配置
cleanup_network_config() {
    log_info "清理现有网络配置..."
    
    # 删除所有NetworkManager连接
    if command -v nmcli >/dev/null 2>&1; then
        nmcli --terse connection show | cut -d: -f1 | while read conn; do
            nmcli connection delete "$conn" 2>/dev/null || true
        done
    fi
    
    # 清理各种网络配置
    rm -f /etc/network/interfaces.d/* || true
    rm -f /etc/NetworkManager/conf.d/* || true
    rm -f /usr/lib/NetworkManager/conf.d/10-globally-managed-devices.conf || true
    
    # 清理systemd-networkd配置
    if [ -d /etc/systemd/network ]; then
        mv /etc/systemd/network /etc/systemd/network.backup
        log_info "已备份systemd-networkd配置"
    fi
    
    # 清理netplan配置（不删除，只修改renderer）
    if [ -d /etc/netplan ]; then
        for file in /etc/netplan/*.yaml /etc/netplan/*.yml; do
            if [ -f "$file" ]; then
                cp "$file" "$file.backup"
                sed -i 's/renderer:.*/renderer: NetworkManager/' "$file"
                log_debug "已修改netplan配置: $file"
            fi
        done
    fi
}

# 3. 配置NetworkManager
configure_networkmanager() {
    log_info "配置NetworkManager..."
    
    mkdir -p /etc/NetworkManager/conf.d
    
    cat > /etc/NetworkManager/NetworkManager.conf << 'EOF'
[main]
plugins=keyfile
dns=default

[keyfile]
unmanaged-devices=none

[device]
wifi.scan-rand-mac-address=no

[connection]
ipv6.dhcp-duid=stable
ipv6.dhcp-iaid=mac
EOF

    # 创建强制管理所有设备的配置
    cat > /etc/NetworkManager/conf.d/10-manage-all.conf << 'EOF'
[keyfile]
unmanaged-devices=none
EOF
    
    log_info "NetworkManager配置完成"
}

# 4. 配置Netplan使用NetworkManager
configure_netplan() {
    log_info "配置Netplan..."
    
    if [ -d "/etc/netplan" ]; then
        local netplan_file=$(find /etc/netplan -name "*.yaml" -o -name "*.yml" | head -1)
        if [ -z "$netplan_file" ]; then
            netplan_file="/etc/netplan/01-network-manager.yaml"
            cat > "$netplan_file" << 'EOF'
network:
  version: 2
  renderer: NetworkManager
EOF
            log_info "创建新的netplan配置: $netplan_file"
        else
            log_info "修改现有netplan配置: $netplan_file"
        fi
        
        netplan generate 2>/dev/null || true
        netplan apply 2>/dev/null || true
    else
        log_debug "系统未使用netplan，跳过配置"
    fi
}

# 5. 启动NetworkManager
start_networkmanager() {
    log_info "启动NetworkManager服务..."
    
    systemctl enable NetworkManager
    systemctl start NetworkManager
    
    # 等待服务启动
    for i in {1..20}; do
        if systemctl is-active --quiet NetworkManager; then
            log_info "NetworkManager 启动成功"
            break
        fi
        sleep 1
    done
    
    if ! systemctl is-active --quiet NetworkManager; then
        log_error "NetworkManager启动失败"
        journalctl -u NetworkManager --no-pager -l | tail -20
        exit 1
    fi
    
    sleep 3
}

# 6. 重新检测所有网络设备
rediscover_all_devices() {
    log_info "重新检测所有网络设备..."
    
    local interfaces=$(get_network_interfaces)
    
    if [ -z "$interfaces" ]; then
        log_warn "未找到网络接口，等待系统重新检测..."
        sleep 5
        interfaces=$(get_network_interfaces)
    fi
    
    for iface in $interfaces; do
        log_info "处理网络接口: $iface"
        
        # 设置设备为托管模式
        nmcli device set "$iface" managed yes 2>/dev/null || log_warn "无法设置 $iface 为托管模式"
        
        # 重新应用设备配置
        nmcli device reapply "$iface" 2>/dev/null || log_debug "无法重新应用 $iface 配置"
        
        # 确保设备状态
        nmcli device connect "$iface" 2>/dev/null || log_debug "无法连接 $iface 设备"
    done
    
    # 重启NetworkManager以重新扫描所有设备
    systemctl restart NetworkManager
    sleep 5
}

# 7. 为所有接口创建网络连接
create_network_connections() {
    log_info "为所有网络接口创建连接..."
    
    local interfaces=$(get_network_interfaces)
    
    for iface in $interfaces; do
        log_info "为接口 $iface 创建网络连接..."
        
        # 删除现有连接
        nmcli connection delete "$iface" 2>/dev/null || true
        
        # 获取该接口的配置信息
        local ipv4_config="${interface_configs["${iface}_ipv4"]}"
        local gateway="${interface_configs["${iface}_gateway"]}"
        local dns_servers="${interface_configs["${iface}_dns"]}"
        local interface_state="${interface_configs["${iface}_state"]}"
        
        # 创建基本连接
        if ! nmcli connection add type ethernet ifname "$iface" con-name "$iface" autoconnect yes 2>/dev/null; then
            log_warn "无法为 $iface 创建连接，尝试其他方式..."
            continue
        fi
        
        # 如果有静态IP配置，则配置静态IP
        if [[ "$ipv4_config" =~ ([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+/[0-9]+) ]]; then
            local ip_cidr="${BASH_REMATCH[1]}"
            local ip_address=$(echo "$ip_cidr" | cut -d'/' -f1)
            local prefix=$(echo "$ip_cidr" | cut -d'/' -f2)
            
            log_info "为 $iface 配置静态IP: $ip_cidr"
            
            nmcli connection modify "$iface" ipv4.method manual \
                ipv4.addresses "$ip_cidr" \
                ipv4.gateway "$gateway" \
                ipv4.dns "$dns_servers"
                
        else
            # 使用DHCP
            log_info "为 $iface 配置DHCP"
            nmcli connection modify "$iface" ipv4.method auto
            if [ -n "$dns_servers" ]; then
                nmcli connection modify "$iface" ipv4.dns "$dns_servers"
            fi
        fi
        
        # 激活连接（如果接口之前是up状态）
        if [ "$interface_state" = "up" ]; then
            if nmcli connection up "$iface" 2>/dev/null; then
                log_info "✅ 接口 $iface 连接激活成功"
            else
                log_warn "⚠️  接口 $iface 连接激活失败"
            fi
        else
            log_info "接口 $iface 保持down状态"
        fi
        
        sleep 1
    done
}

# 8. 最终验证和诊断
final_diagnosis() {
    log_info "执行最终诊断..."
    
    echo ""
    echo "=== 系统网络设备 ==="
    ip link show
    echo ""
    
    echo "=== IP地址信息 ==="
    ip addr show
    echo ""
    
    echo "=== 路由表 ==="
    ip route show
    echo ""
    
    echo "=== NetworkManager设备状态 ==="
    nmcli device status
    echo ""
    
    echo "=== NetworkManager连接状态 ==="
    nmcli connection show --active
    echo ""
    
    echo "=== 网络服务状态 ==="
    systemctl status NetworkManager --no-pager -l | head -10
    echo ""
    
    # 检查网络连通性
    log_info "测试网络连通性..."
    if ping -c 2 -W 3 8.8.8.8 >/dev/null 2>&1; then
        log_info "✅ 网络连通性测试通过"
    else
        log_warn "⚠️  网络连通性测试失败，但迁移已完成"
        log_warn "请检查网络配置或手动重启网络接口"
    fi
}

# 显示迁移摘要
show_migration_summary() {
    log_info "=== 迁移摘要 ==="
    echo "备份位置: $backup_dir"
    echo "处理的接口: $(get_network_interfaces | tr '\n' ' ')"
    echo "NetworkManager 状态: $(systemctl is-active NetworkManager)"
    echo ""
    log_info "迁移完成！如果遇到网络问题，请检查备份目录中的配置。"
}

# 主函数
main() {
    log_info "开始通用网络服务迁移流程..."
    
    # 检测系统
    detect_os
    
    # 安装NetworkManager
    install_networkmanager
    
    # 备份配置
    local backup_dir=$(backup_network_config)
    
    # 收集当前配置
    collect_current_network_config
    
    # 执行迁移步骤
    stop_all_network_services
    cleanup_network_config
    configure_networkmanager
    configure_netplan
    start_networkmanager
    rediscover_all_devices
    create_network_connections
    final_diagnosis
    show_migration_summary
}

# 参数检查
if [ "$1" = "--help" ] || [ "$1" = "-h" ]; then
    echo "通用网络服务迁移脚本"
    echo "用法: $0"
    echo ""
    echo "功能:"
    echo "  1. 自动安装NetworkManager（如需要）"
    echo "  2. 备份现有网络配置"
    echo "  3. 自动检测所有网络接口"
    echo "  4. 迁移到NetworkManager"
    echo "  5. 保持原有的IP配置"
    echo ""
    echo "支持的操作系统: Ubuntu, Debian, CentOS, RHEL, Fedora, openSUSE, Arch"
    echo "注意: 此脚本需要root权限执行"
    exit 0
fi

# 检查root权限
if [ "$EUID" -ne 0 ]; then
    log_error "请使用root权限运行此脚本"
    exit 1
fi

# 执行主函数
main "$@"