Bdtyktl

I am new to the netplan on Ubuntu 18.04, just discovered it exists today.
I have an interface that I am trying to add to create a floating IP on google cloud. It is based on this example:
https://cloud.google.com/solutions/best-practices-floating-ip-addresses#implementing_option_4

I tested the example, and it works, but now I try to do the same on ubuntu, and I don't know how to convert this:

cat << EOF >> /etc/network/interfaces

auto eth0:0

iface eth0:0 inet static

    address 10.190.1.1

    netmask 255.255.255.255

EOF

to netplan.

The output for ls /etc/netplan is '50-cloud-init.yaml'. and the output for cat /etc/netplan/*.yaml is:

network:

    version: 2

    ethernets:

        ens4:

            dhcp4: true

            match:

                macaddress: 42:01:0a:8e:00:3e

            set-name: ens4

my ifconfig:

# ifconfig  ens4

ens4: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1460

    inet 10.142.0.62  netmask 255.255.255.255  broadcast 0.0.0.0

    inet6 fe80::4001:aff:fe8e:3e  prefixlen 64  scopeid 0x20<link>

    ether 42:01:0a:8e:00:3e  txqueuelen 1000  (Ethernet)

    RX packets 9430  bytes 1635180 (1.6 MB)

    RX errors 0  dropped 0  overruns 0  frame 0

    TX packets 13383  bytes 1513428 (1.5 MB)

    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

What is the equivalent of what he said to put in the file, for netplan?

First, your /etc/network/interfaces is incorrect. You can't ask for "auth eth0" and then set a static address later.

auto eth0:0

iface eth0:0 inet static

    address 10.190.1.1

    netmask 255.255.255.255

If I understand what you're trying to do, then this netplan .yaml snippet is the minimum that you need...

network:

  version: 2

  renderer: networkd

  ethernets:

    ens4:

      dhcp4: false

      dhcp6: false

      addresses:

        - 10.142.0.62/24 # server #1, 10.142.0.63/24 for server #2

        - 10.190.1.1/24  # floating IP in keepalived.conf

      gateway4: 10.142.0.1

Assumptions:

• only one ethernet interface, ens4:


• if you have a multiport ethernet card, my .yaml needs additional code


• Ubuntu Server environment


• not using NetworkManager

Seems like you cannot create eth0:0

Check this out: https://netplan.io/examples

Multiple addresses on an interface

network:

  version: 2

  renderer: networkd

  ethernets:

    enp3s0:

     addresses:

       - 10.100.1.38/24

       - 10.100.1.39/24

     gateway4: 10.100.1.1



Multiple gateways and multiple ips



network:

  version: 2

  renderer: networkd

  ethernets:

    enp3s0:

     addresses:

       - 9.0.0.9/24

       - 10.0.0.10/24

       - 11.0.0.11/24

     #gateway4:    # unset, since we configure routes below

     routes:

       - to: 0.0.0.0/0

         via: 9.0.0.1

         metric: 100

       - to: 0.0.0.0/0

         via: 10.0.0.1

         metric: 100

       - to: 0.0.0.0/0

         via: 11.0.0.1

         metric: 100