☰

意外的“隐藏”附加 DHCP 地址

tag-icon • tag-icon networking dhcp
意外的“隐藏”附加 DHCP 地址

由于某种原因，我的 Ubuntu 服务器“窃取”了 DHCP 池地址，尽管它应该只有一个静态地址。有趣的是，甚至无法看出ifconfig存在虚假地址。但该盒子肯定可以通过该 IP 访问，并且它当然会在 dhcp 服务器中显示和刷新。

我猜测是 cloud.cfg 中的设置导致了这个问题，但即使我是 netplan 新手，我似乎也按照建议的方法来禁用它……？！

lsb_release -a

No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 18.04.1 LTS
Release:        18.04
Codename:       bionic

是否配置

ens160: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1438
        inet 10.0.1.128  netmask 255.255.254.0  broadcast 10.0.1.255
        inet6 fe80::250:56ff:fe95:df1f  prefixlen 64  scopeid 0x20<link>
        ether 00:50:56:95:df:1f  txqueuelen 1000  (Ethernet)
        RX packets 3853208  bytes 2793921154 (2.7 GB)
        RX errors 0  dropped 1170  overruns 0  frame 0
        TX packets 907823  bytes 750573388 (750.5 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 661271  bytes 106863136 (106.8 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 661271  bytes 106863136 (106.8 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

cat /etc/netplan/01-netcfg.yaml

# This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
 version: 2
 renderer: networkd
 ethernets:
   ens160:
     dhcp4: no
     dhcp6: no
     addresses: [10.0.1.128/23]
     gateway4: 10.0.0.1
     nameservers:
       addresses: [10.0.0.5]

猫/etc/netplan/50-cloud-init.yaml

# This file is generated from information provided by
# the datasource.  Changes to it will not persist across an instance.
# To disable cloud-init's network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
    ethernets:
        ens160:
            addresses: []
            dhcp4: true
            optional: true
    version: 2

cat /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg

network: {config: disabled}

相关内容