最後更新: 2023-01-16

前言

它是個 Network configuration utility

使用 yaml 格式去設置 Backend (networkd / NetworkManager)

目錄

• 安裝
• Useful Configure Options
• Get Status
• Configure Summary

安裝

apt-get install netplan.io

Backend

• networkd
• NetworkManager

ie.

network:
  version: 2
  renderer: networkd
  ...

Status

netplan status

     Online state: offline
    DNS Addresses: 127.0.0.53 (stub)
       DNS Search: .

●  1: lo ethernet UNKNOWN/UP (unmanaged)
      MAC Address: 00:00:00:00:00:00
        Addresses: 127.0.0.1/8
                   ::1/128

●  4: eth0 ethernet UP (unmanaged)
      MAC Address: 00:16:3e:84:83:41
        Addresses: fe80::216:3eff:fe84:8341/64 (link)
           Routes: fe80::/64 metric 256

# info      Show available features

netplan info

netplan.io:
  website: "https://netplan.io/"
  features:
  - dhcp-use-domains
  - auth-phase2
  - ipv6-mtu
  - modems
  - sriov
  - openvswitch
  - activation-mode
  - eswitch-mode
  - infiniband
  - regdom
  - vrf
  - vxlan
  - dbus-config
  - generate-just-in-time        # 開機時根據現有 DEVICEs 去建立設定檔
  - generated-supplicant         # generation of a supplicant configuration file for wireless
  - default-routes               # specifying the gateway and metric

try & apply

try: Try to apply a new netplan config to running system, with automatic rollback

Useful Configure Options

'optional: true'

declarations that allow booting to occur without waiting for those interfaces to activate fully.

Configure Summary

/etc/netplan/name.yaml

network:
  version: 2
  ethernets:
    eth0:
      dhcp4: false
      addresses: [192.168.123.17/24]
      routes:
              - to: default
                via: 192.168.123.1
      nameservers:
        addresses: [192.168.123.1, 8.8.8.8]
        search: [local]

# 多 IP

network:
  version: 2
  ethernets:
    ens4:
      addresses:
      - 192.168.88.241/24
      - 192.168.88.244/24
...

# Bridges

network:
  version: 2
  renderer: networkd
  ethernets:
    enp2s0:
      dhcp4: no
  bridges:
    br0:
      macaddress: 00:1a:3e:88:02:41
      interfaces:
        - enp2s0
      parameters:
        stp: false
        forward-delay: 0
      addresses: [192.168.123.10/24]
...

Notes

最好自定 MAC address, 否則 clone 出來的 instance 可能會撞 MAC address

• 00:1a:3e <- 沒公司佔用
• 88          <- 所在 IP network
• 02:241   <- 它的 IP 尾數

在 Bridges 情況下 "netplan try" 無效, 只能 "netplan apply" 之後等 rollback