Ubuntu

Ubuntu：netplan 禁用 dhcp

  • March 25, 2022

系統 ip 配置 b4 netplan 編輯：

root@pro-rpi-02:/# ip a sh
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
   link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
   inet 127.0.0.1/8 scope host lo
      valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
   link/ether dc:a6:32:b3:45:e0 brd ff:ff:ff:ff:ff:ff
   inet 192.168.1.2/26 brd 192.168.1.63 scope global eth0
      valid_lft forever preferred_lft forever
   inet 192.168.1.7/26 brd 192.168.1.63 scope global secondary eth0
      valid_lft forever preferred_lft forever
   inet6 fe80::4569:7d7a:108d:c2ad/64 scope link
      valid_lft forever preferred_lft forever

我在 netplan 中添加了一個 vlan：

root@pro-rpi-02:/# more /etc/netplan/01-netcfg.yaml
network:
 version: 2
 renderer: networkd
 ethernets:
   eth0:
     dhcp4: no
     addresses:
       - 192.168.1.2/26
     gateway4: 192.168.1.10
     nameservers:
         addresses: [192.168.1.24]
         search: [hello.home]
 vlans:
   vlan.8:
     id: 8
     link: eth0
     dhcp4: no
     addresses:
       - 192.168.8.2/24

現在有趣的部分：

root@pro-rpi-02:/cluster/Radius# ip addr sh
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
   link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
   inet 127.0.0.1/8 scope host lo
      valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
   link/ether dc:a6:32:b3:45:e0 brd ff:ff:ff:ff:ff:ff
   inet 192.168.1.2/26 brd 192.168.1.63 scope global eth0
      valid_lft forever preferred_lft forever
   inet 192.168.1.5/26 brd 192.168.1.63 scope global secondary eth0
      valid_lft forever preferred_lft forever
   inet6 fe80::4569:7d7a:108d:c2ad/64 scope link
      valid_lft forever preferred_lft forever
3: wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
   link/ether dc:a6:32:b3:45:e1 brd ff:ff:ff:ff:ff:ff
4: vlan.8@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
   link/ether dc:a6:32:b3:45:e0 brd ff:ff:ff:ff:ff:ff
   inet 192.168.8.2/24 brd 192.168.8.255 scope global vlan.8
      valid_lft forever preferred_lft forever
   inet 192.168.8.112/24 brd 192.168.8.255 scope global secondary noprefixroute vlan.8
      valid_lft forever preferred_lft forever

任何人都可以解釋為什麼我得到 dhcp 地址 192.168.8.112/24 ？或者至少讓我知道我可以從哪裡開始尋找？

root@pro-rpi-02:/# netplan --debug generate
DEBUG:command generate: running ['/lib/netplan/generate']
** (generate:750570): DEBUG: 12:17:28.037: Processing input file /etc/netplan/01-netcfg.yaml..
** (generate:750570): DEBUG: 12:17:28.038: starting new processing pass
** (generate:750570): DEBUG: 12:17:28.038: We have some netdefs, pass them through a final round of validation
** (generate:750570): DEBUG: 12:17:28.038: eth0: setting default backend to 1
** (generate:750570): DEBUG: 12:17:28.038: Configuration is valid
** (generate:750570): DEBUG: 12:17:28.038: vlan.8: setting default backend to 1
** (generate:750570): DEBUG: 12:17:28.039: Configuration is valid
** (generate:750570): DEBUG: 12:17:28.040: Generating output files..
** (generate:750570): DEBUG: 12:17:28.040: openvswitch: definition eth0 is not for us (backend 1)
** (generate:750570): DEBUG: 12:17:28.040: NetworkManager: definition eth0 is not for us (backend 1)
** (generate:750570): DEBUG: 12:17:28.040: openvswitch: definition vlan.8 is not for us (backend 1)
** (generate:750570): DEBUG: 12:17:28.040: NetworkManager: definition vlan.8 is not for us (backend 1)

UPDATE 1，根據要求，這是輸出，但在這裡看不到任何可以幫助我的東西:)

root@pro-rpi-02:~# networkctl --full --all --no-pager status
● 1: lo
                    Link File: /usr/lib/systemd/network/99-default.link
                 Network File: n/a
                         Type: loopback
                        State: carrier (unmanaged)
                          MTU: 65536
                        QDisc: noqueue
 IPv6 Address Generation Mode: eui64
         Queue Length (Tx/Rx): 1/1
                      Address: 127.0.0.1

● 2: eth0
                    Link File: /usr/lib/systemd/network/99-default.link
                 Network File: /run/systemd/network/10-netplan-eth0.network
                         Type: ether
                        State: routable (failed)
                         Path: platform-fd580000.ethernet
                       Driver: bcmgenet
                   HW Address: dc:a6:32:b3:45:e0 (Raspberry Pi Trading Ltd)
                          MTU: 1500 (min: 68, max: 1500)
                        QDisc: mq
 IPv6 Address Generation Mode: eui64
         Queue Length (Tx/Rx): 5/5
             Auto negotiation: yes
                        Speed: 1Gbps
                       Duplex: full
                         Port: mii
                      Address: 192.168.1.2
                               192.168.1.5
                               192.168.1.7
                               fe80::4569:7d7a:108d:c2ad
                      Gateway: 192.168.1.10
                          DNS: 192.168.1.24
               Search Domains: hello.home
            DHCP6 Client DUID: DUID-EN/Vendor:0000ab112ca77a819cd16ac00000

Mar 10 22:03:14 pro-rpi-02 systemd-networkd[926]: eth0: IPv6 successfully enabled
Mar 10 22:03:14 pro-rpi-02 systemd-networkd[926]: eth0: Link UP
Apr 19 16:51:22 pro-rpi-02 systemd-networkd[926]: eth0: Gained carrier
Apr 19 16:51:24 pro-rpi-02 systemd-networkd[926]: eth0: Gained IPv6LL
Apr 20 16:32:48 pro-rpi-02 systemd-networkd[926]: eth0: DHCPv6 lease lost
Apr 20 16:32:48 pro-rpi-02 systemd-networkd[672911]: eth0: Gained IPv6LL
Apr 20 16:32:48 pro-rpi-02 systemd-networkd[672911]: eth0: IPv6 successfully enabled
Apr 20 16:32:48 pro-rpi-02 systemd-networkd[672911]: eth0: Could not set route: Nexthop has invalid gateway. Network is unreachable
Apr 20 16:32:48 pro-rpi-02 systemd-networkd[672911]: eth0: Failed

● 3: wlan0
                    Link File: /usr/lib/systemd/network/99-default.link
                 Network File: n/a
                         Type: wlan
                        State: no-carrier (unmanaged)
                         Path: platform-fe300000.mmcnr
                       Driver: brcmfmac
                   HW Address: dc:a6:32:b3:45:e1 (Raspberry Pi Trading Ltd)
                          MTU: 1500 (min: 68, max: 1500)
                        QDisc: fq_codel
 IPv6 Address Generation Mode: none
         Queue Length (Tx/Rx): 1/1

Apr 19 16:51:22 pro-rpi-02 systemd-networkd[926]: wlan0: Link UP

● 4: vlan8
                    Link File: /usr/lib/systemd/network/99-default.link
                 Network File: /run/systemd/network/10-netplan-vlan8.network
                         Type: vlan
                        State: routable (configuring)
                       Driver: 802.1Q VLAN Support
                   HW Address: dc:a6:32:b3:45:e0 (Raspberry Pi Trading Ltd)
                          MTU: 1500 (max: 65535)
                        QDisc: noqueue
 IPv6 Address Generation Mode: eui64
                      VLan Id: 8
         Queue Length (Tx/Rx): 1/1
             Auto negotiation: yes
                        Speed: 1Gbps
                       Duplex: full
                         Port: mii
                      Address: 192.168.8.2
                               192.168.8.112
                      Gateway: 192.168.8.10
            DHCP6 Client DUID: DUID-EN/Vendor:0000ab112ca77a819cd16ac00000

Apr 20 16:32:48 pro-rpi-02 systemd-networkd[672911]: vlan8: netdev ready
Apr 20 16:32:49 pro-rpi-02 systemd-networkd[672911]: vlan8: Link UP
Apr 20 16:32:49 pro-rpi-02 systemd-networkd[672911]: vlan8: Gained carrier
Apr 20 16:32:49 pro-rpi-02 systemd-networkd[672911]: vlan8: IPv6 successfully enabled

在花了 X 小時試圖在這裡找到修復程序後，我決定禁用dhcpcd服務：

root@pro-rpi-02:~# systemctl status dhcpcd.service
● dhcpcd.service - DHCP Client Daemon
    Loaded: loaded (/lib/systemd/system/dhcpcd.service; disabled; vendor preset: enabled)
    Active: inactive (dead)
      Docs: man:dhcpcd(8)

現在一切都像我希望的那樣工作：

root@pro-rpi-02:~# more /etc/netplan/01-netcfg.yaml
network:
 version: 2
 renderer: networkd
 ethernets:
   eth0:
     dhcp4: no
     dhcp6: no
     addresses:
       - 192.168.1.2/26
     gateway4: 192.168.1.10
     nameservers:
         addresses: [192.168.1.24]
         search: [hello.home]
 vlans:
   vlan8:
     id: 8
     link: eth0
     dhcp4: no
     dhcp6: no
     addresses:
       - 192.168.8.2/24
root@pro-rpi-02:~# ip a sh vlan8
4: vlan8@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
   link/ether dc:a6:32:b3:45:e0 brd ff:ff:ff:ff:ff:ff
   inet 192.168.8.2/24 brd 192.168.8.255 scope global vlan8
      valid_lft forever preferred_lft forever
   inet6 fe80::dea6:32ff:feb3:45e0/64 scope link
      valid_lft forever preferred_lft forever

引用自：https://serverfault.com/questions/1060812

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