Netplan error in network definition expected mapping

Question

no way to make the network works on the new ubuntu server. This is the netplan yaml file:

# 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:
  version: 2
  ethernets:
    enp0s3:
       addresses: [192.168.0.183/24]
       gateway4: 192.168.0.250
       dhcp4: false
       nameservers: 
         addresses: [8.8.8.8,8.8.4.4]
       optional: true

running netplan --debug apply I get:

Error in network definition //etc/netplan/50-cloud-init.yaml line 1 column 1: expected mapping

I'm going crazy, it was so simple before! Why doesn't work? what does it mean this error?

Solution 1

removing dhcp4 setting fixed the issue...who knows!

maybe because if you enable the dhcp you have to set it to "true" and if you disable you have to set to "no"? I really hope not!!

debug info completely useless

Solution 2

a netplan configuration is base on yaml, when looking your configuration. i think the indentation is error because its have 3 space. maybe you can try this

# 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:
  version: 2
  ethernets:
    enp0s3:expected mapping
      addresses: [192.168.0.183/24]
      gateway4: 192.168.0.250
      dhcp4: false
      nameservers: 
        addresses: [8.8.8.8,8.8.4.4]
      optional: true

Comments

[noobninja]

if you add a second device under ethernets, you may be able to configure that new network device to both dhcp4: false and dhcp6: false. in other words, it may be the initial network device which needs DHCP.