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user212827
Asked: 2024-05-13 05:06:02 +0800 CST

systemd networkd 可以配置为网络启动、PXE 启动吗？如果可以，如何配置？

  • 772

如果我理解这个“问题” （systemd-networkd DHCP 服务器忽略 SendOptions #15780），则可以配置 SystemD 来处理网络启动。但是，我无法找到有关该功能的更多信息。

我目前使用的是配置最少的 DHCPD 服务器，如果可以将其移动到 DHCPD 服务器就好了systemd-networkd，它可以处理我的环境中的所有其他网络功能。

# /etc/dhcpd.conf
allow booting; # How is this defined in systemd-networkd?
allow bootp;   # How is this defined in systemd-networkd?

# If this DHCP server is the official DHCP server for the local
# network, the authoritative directive should be uncommented.
authoritative; # How is this defined in systemd-networkd?

option architecture code 93 = unsigned integer 16; # I think this corresponds to SendOption=93:uint16:architecture

host client_computer {
  hardware ethernet a1:b2:c3:d4:e5:f6; # This should be captured with [Match] MACAddress=a1:b2:c3:d4:e5:f6

  fixed-address 192.168.1.101; # I think this corresponds to something like SendOption=???:ipv4address:192.168.1.101
  next-server 192.168.1.100; # This should be defines as [Network] Address?

  option host-name "clientname"; # I think this corresponds to something like SendOption=12:string:clientname
  option root-path "/srv/tftp";  # I think this corresponds to something like SendOption=17:string:/srv/tftp

  if option architecture = 00:07 {
    filename "grub/x86_64-efi/core.efi"; # I think this corresponds to SendOption=67:string:grub/x86_64-efi/core.efi
  }
  else {
    filename "grub/i396-pc/core.0"; # I think this corresponds to SendOption=67:string:grub/i396-pc/core.0
  }
}

看来我需要“选项”代码，但是在哪里可以找到它们？有规格吗？ - 找到他们 ：）

SystemD NetworkD文档。

到目前为止我所拥有的：

#allow booting; = ? # Not necessary?
#allow bootp;   = ? # Not necessary?
#authoritative; = ? # Not necessary?

[Match]
MACAddress=a1:b2:c3:d4:e5:f6

[Network]
DHCP=no
DHCPServer=true

Address=192.168.1.100/24 # DHCP server IP

[DHCPv4]
ClientIdentifier=mac

[DHCPServer]
PoolOffset=3
PoolSize=7

BootServerAddress=192.168.1.100/24

#SendOption=93:uint16:architecture # Failed to parse DHCP uint16 data, ignoring assignment: architecture # Not necessary?

#SendOption=???:ipv4address:192.168.1.101

SendOption=12:string:clientname # 12 "Hostname"

SendOption=17:string:/srv/tftp  # 17 "Root Path"

# BootFilename=grub/i396-pc/core.0 # Sane as code 67
# SendOption=67:string:grub/x86_64-efi/core.efi
SendOption=67:string:grub/i396-pc/core.0

[DHCPServerStaticLease]
MACAddress=a1:b2:c3:d4:e5:f6
Address=192.168.1.101

更新#1

使用tcpdump -i <INTERFACE> -nn -s0 -v -A udp port 67我可以看到 SystemD NetworkD DCHP 服务器正在与客户端交互！

但是，系统无法启动，问题似乎是未将预期的静态 IP 地址分配给客户端。

该[DHCPServerStaticLease]部分似乎没有效果。我在 <= 253 中发现了一些有关错误的信息systemctl --version，并添加了解决方法ClientIdentifier=mac。不过，这应该不是必需的，因为我运行的是 255 版本。

哦，我添加了Pool*参数，但 DHCP 服务器仍然分配相同的 IP (192.168.1.242)。

linux

1 个回答

  1. Best Answer

    答案是肯定的！以下配置对我有用。

    [Match]
Name=<NETWORKD DEVICE NAME>

[Network]
DHCP=yes                        # Required
DHCPServer=true                 # Required

IPForward=yes                   # Required if to pass traffic from client
IPMasquerade=both               # Required if to pass traffic from client

Address=192.168.1.100/24        # Required

#[DHCPv4]                       # Was not necessary
#ClientIdentifier=mac           # Was not necessary

[DHCPServer]

#PoolOffset=100                 # Not necessaary
#PoolSize=1                     # Not necessaary

BootServerAddress=192.168.1.100 # Required

# Hostname=                     # Forgot to test but should be same as code 12
SendOption=12:string:clientname # optional

# 17 "Root Path"
SendOption=17:string:/srv/tftp  # Required

# I do not know how to select between EFI and i386 depending on the client.
# Comment out the one required. EFI worked for me.

# EFI
BootFilename=/srv/tftp/grub/x86_64-efi/core.efi # Required; providing full path but relative path should work? Forgot to test.
#SendOption=67:string:grub/x86_64-efi/core.efi   # Should be the same as BootFilename  

# i386
#SendOption=67:string:grub/i396-pc/core.0
#BootFilename=grub/i396-pc/core.0

[DHCPServerStaticLease]
MACAddress=a1:b2:c3:d4:e5:f6
Address=192.168.1.101

    陷阱

    • 累的时候不要这样做:)
    • networkctl reload更改配置后
    • 禁用任何其他非 SystemD DHCP 服务器
    • NetworkD conf 文件：例如，不要在与指定值相同的行上进行注释Address=192.168.1.100/24 # My Server
    • 0

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