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hunmonk
Asked: 2020-03-03 21:47:48 +0800 CST

无法通过 Google Compute Engine VM 上的 systemd-networkd 配置 Wireguard 设备

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Google Compute Engine VM 上的 Debian Buster 映像，我将这个 systemd-networkd 配置放置在 /etc/systemd/network/wg0.netdev 以配置 Wireguard 设备：

[NetDev]
Name=wg0
Kind=wireguard

[WireGuard]
PrivateKey = XXXXX
ListenPort = 51820

[WireGuardPeer]
Endpoint = XXXXX:51820
PublicKey = XXXXX
AllowedIPs = XXXXX/32
AllowedIPs = XXXXX/24

启动 systemd-networkd 服务时，出现此错误：

Starting Network Service...
Failed to generate predictable MAC address for wg0: No such file or directory
Could not load configuration files: No such file or directory
systemd-networkd.service: Main process exited, code=exited, status=1/FAILURE

奇怪的是：

  1. 我可以通过手动配置而不是通过 systemd 在 GCP 服务器上成功启动 wg0 接口
  2. 我可以在其他提供商虚拟机（测试 Vultr 和本地 Vagrant）上成功使用上述 systemd-networkd 配置

因此，该错误仅发生在 GCP 服务器上使用 systemd-networkd 配置的特定组合中。

我在所有服务器上使用完全相同的 Linux 内核和 Wireguard 版本。如果它是特定于 GCP 的配置，我似乎找不到任何相关文档。

google-compute-engine wireguard systemd-networkd

2 个回答

  1. 我已经使用 Ubuntu 18.04 检查了 GCE VM 上的 Wireguard，它运行时没有任何问题。

    请在下面找到我的步骤：

    1. 基于 Ubuntu 18.04 创建虚拟机实例
    $ gcloud compute instances create instance-1 --machine-type=e2-medium --can-ip-forward --tags=vpn --image=ubuntu-1804-bionic-v20201111 --image-project
=ubuntu-os-cloud
    1. 创建防火墙规则：
    $ gcloud compute firewall-rules create to-vpn --direction=INGRESS --priority=1000 --network=default --action=ALLOW --rules=udp:51820 --source-ranges=0.0.0.0/0 --target-tags=vpn
    1. 安装wireguard-tools：
    $ gcloud compute ssh instance-1
instance-1:~$ cat /etc/lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04.5 LTS"
instance-1:~$ sudo apt update
instance-1:~$ sudo apt upgrade
instance-1:~$ sudo apt install wireguard-tools
    1. 生成服务器密钥：
    instance-1:~$ umask 077; wg genkey | tee privatekey | wg pubkey > publickey
instance-1:~$ sudo cat privatekey 
2PSZW0mLV5YYE0oPBTKtOuZoQHYCIsoEg8KBcLdL+FY=
    1. 生成服务器配置：
    instance-1:~$ sudo cat /etc/wireguard/wg0.conf
[Interface]
Address = 10.156.0.17
MTU = 1440
ListenPort = 51820
PrivateKey = 2PSZW0mLV5YYE0oPBTKtOuZoQHYCIsoEg8KBcLdL+FY=
    1. 启用并启动服务：
    instance-1:~$ sudo systemctl enable wg-quick@wg0
instance-1:~$ sudo systemctl start wg-quick@wg0
instance-1:~$ sudo systemctl status wg-quick@wg0
● [email protected] - WireGuard via wg-quick(8) for wg0
   Loaded: loaded (/lib/systemd/system/[email protected]; indirect; vendor preset: enabled)
   Active: active (exited) since Mon 2020-11-16 16:42:07 UTC; 10s ago
     Docs: man:wg-quick(8)
           man:wg(8)
           https://www.wireguard.com/
           https://www.wireguard.com/quickstart/
           https://git.zx2c4.com/wireguard-tools/about/src/man/wg-quick.8
           https://git.zx2c4.com/wireguard-tools/about/src/man/wg.8
  Process: 4937 ExecStart=/usr/bin/wg-quick up wg0 (code=exited, status=0/SUCCESS)
 Main PID: 4937 (code=exited, status=0/SUCCESS)
    Tasks: 0 (limit: 4671)
   CGroup: /system.slice/system-wg\x2dquick.slice/[email protected]

Nov 16 16:42:07 instance-1 systemd[1]: Starting WireGuard via wg-quick(8) for wg0...
Nov 16 16:42:07 instance-1 wg-quick[4937]: [#] ip link add wg0 type wireguard
Nov 16 16:42:07 instance-1 wg-quick[4937]: [#] wg setconf wg0 /dev/fd/63
Nov 16 16:42:07 instance-1 wg-quick[4937]: [#] ip -4 address add 10.156.0.17 dev wg0
Nov 16 16:42:07 instance-1 wg-quick[4937]: [#] ip link set mtu 1440 up dev wg0
Nov 16 16:42:07 instance-1 systemd[1]: Started WireGuard via wg-quick(8) for wg0.
    1. 检查服务状态：
    instance-1:~$ sudo wg
interface: wg0
  public key: 4sLXXmfK8Llr84wzoy8vfV3B0lV0w/RlR94YPnAbYS4=
  private key: (hidden)
  listening port: 51820
instance-1:~$ sudo ip a show wg0
3: wg0: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1440 qdisc noqueue state UNKNOWN group default qlen 1000
    link/none 
    inet 10.156.0.17/32 scope global wg0
       valid_lft forever preferred_lft forever
    1. 重置 VM 实例并检查状态：
    instance-1:~$ sudo systemctl status systemd-networkd
● systemd-networkd.service - Network Service
   Loaded: loaded (/lib/systemd/system/systemd-networkd.service; enabled; vendor preset: enabled)
   Active: active (running) since Mon 2020-11-16 16:54:52 UTC; 7min ago
     Docs: man:systemd-networkd.service(8)
 Main PID: 751 (systemd-network)
   Status: "Processing requests..."
    Tasks: 1 (limit: 4671)
   CGroup: /system.slice/systemd-networkd.service
           └─751 /lib/systemd/systemd-networkd

Nov 16 16:54:52 instance-1 systemd-networkd[751]: ens4: IPv6 successfully enabled
Nov 16 16:54:52 instance-1 systemd-networkd[751]: lo: Link is not managed by us
Nov 16 16:54:52 instance-1 systemd-networkd[751]: ens4: Link UP
Nov 16 16:54:52 instance-1 systemd-networkd[751]: ens4: Gained carrier
Nov 16 16:54:52 instance-1 systemd-networkd[751]: ens4: DHCPv4 address 10.156.0.17/32 via 10.156.0.1
Nov 16 16:54:52 instance-1 systemd-networkd[751]: Not connected to system bus, not setting hostname.
Nov 16 16:54:53 instance-1 systemd-networkd[751]: ens4: Gained IPv6LL
Nov 16 16:54:53 instance-1 systemd-networkd[751]: ens4: Configured
Nov 16 16:55:01 instance-1 systemd-networkd[751]: wg0: Link UP
Nov 16 16:55:01 instance-1 systemd-networkd[751]: wg0: Gained carrier
$ sudo systemctl status wg-quick@wg0
● [email protected] - WireGuard via wg-quick(8) for wg0
   Loaded: loaded (/lib/systemd/system/[email protected]; indirect; vendor preset: enabled)
   Active: active (exited) since Mon 2020-11-16 16:55:01 UTC; 8min ago
     Docs: man:wg-quick(8)
           man:wg(8)
           https://www.wireguard.com/
           https://www.wireguard.com/quickstart/
           https://git.zx2c4.com/wireguard-tools/about/src/man/wg-quick.8
           https://git.zx2c4.com/wireguard-tools/about/src/man/wg.8
  Process: 1115 ExecStart=/usr/bin/wg-quick up wg0 (code=exited, status=0/SUCCESS)
 Main PID: 1115 (code=exited, status=0/SUCCESS)

Nov 16 16:55:01 instance-1 systemd[1]: Starting WireGuard via wg-quick(8) for wg0...
Nov 16 16:55:01 instance-1 wg-quick[1115]: [#] ip link add wg0 type wireguard
Nov 16 16:55:01 instance-1 wg-quick[1115]: [#] wg setconf wg0 /dev/fd/63
Nov 16 16:55:01 instance-1 wg-quick[1115]: [#] ip -4 address add 10.156.0.17 dev wg0
Nov 16 16:55:01 instance-1 wg-quick[1115]: [#] ip link set mtu 1440 up dev wg0
Nov 16 16:55:01 instance-1 systemd[1]: Started WireGuard via wg-quick(8) for wg0.
instance-1:~$ sudo wg
interface: wg0
  public key: 4sLXXmfK8Llr84wzoy8vfV3B0lV0w/RlR94YPnAbYS4=
  private key: (hidden)
  listening port: 51820
instance-1:~$ sudo ip a show wg0
3: wg0: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1440 qdisc noqueue state UNKNOWN group default qlen 1000
    link/none 
    inet 10.156.0.17/32 scope global wg0
       valid_lft forever preferred_lft forever

    此外，请在此处查看Ubuntu 较新版本的第 3 方指南。

    • 1
  2. Best Answer

    自从我的原始报告以来，问题似乎已经解决，无论是在 GCP 的图像中，还是在 systemd 本身中。现在工作正常。

    • 1

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