Ubuntu netplan config for secondary ip address

cloud-ubuntu-netplan-secondary-ip-static.md

In case there's already a DHCP config for netplan for the private IP address:

File: /etc/netplan/50-cloud-init.yaml

Contents:

# 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:
        ens3:
            addresses: []
            dhcp4: true
            optional: true
    version: 2

To add a secondary, public IP address:

Create /etc/netplan/60-static.yaml

Contents:

network:
  version: 2
  renderer: networkd
  ethernets:
    ens3:
      addresses:
        - 148.251.64.58/24

Then apply config:

netplan try

Thanks, exacly what I needed. Gotta get familiar with netplan now Ubuntu 18 uses it by default 👍

Thanks! For me it works only after installing latest version of netplan.io (0.40.1) package from "proposed" repo.

Thanks, worked on my Vultr droplet. Tip for Vultr people: you have to reboot from their dashboard (not console) first and then change the config.

Working perfect in Ubuntu 18.04 VPS.
One question...for adding more IPs we should add new .YAML files or what would be the way?
Thank you,

@miesismore you could add another file, or just add the new IP address in the same file:

addresses: 
  - 148.251.64.58/24
  - 148.251.64.59/24

@miesismore for more information have a look at https://netplan.io/reference (there's also an example page)

@miesismore you could add another file, or just add the new IP address in the same file:

addresses: 
  - 148.251.64.58/24
  - 148.251.64.59/24

Thank you Thomas!!

How to add multiple IP from 1 interfaces?

Thanks, worked on my Vultr droplet. Tip for Vultr people: you have to reboot from their dashboard (not console) first and then change the config.

@galaczi save my day. Thanks for the good tip!

On Ubuntu 20.04, I had to add 'dhcp4: true' on second file, otherwise my first address is overwritten

netplan get
network:
  version: 2
  renderer: networkd
  ethernets:
    hotplug:
      match:
        name: "ens*"
      dhcp4: true
    ens4:
      addresses:
      - "10.255.0.252/32"
      **dhcp4: true**

Thank you