Error in network definition unknown key addresses

Error in network definition unknown key addresses

I’ve read the netplan examples here (https://netplan.io/examples) but an still scratching my head with a syntax error.

I am trying to set up my DNS servers to avoid an issue I am having with DNS at a work site which uses a home wifi setup with a notoriously flakey DNS server — I have described the issue here:
https://ubuntuforums.org/showthread.php?t=2411835

I am following this tutorial for 18.04 (https://www.techrepublic.com/article/how-to-set-dns-nameservers-in-ubuntu-server-18-04/) which tells me how to setup the DNS servers.

Unfortunately when I

$ sudo netplan —debug apply

I get an error about syntax — it does not seem to like the «nameservers» bit

/etc/netplan/01-network-manager-all.yaml line 1 column 0: unknown key nameservers

My /etc/netplan/01-network-manager-all.yaml line file looks like this:

# Let NetworkManager manage all devices on this systemnetwork:
version: 2
renderer: NetworkManager
nameservers:
addresses: [8.8.4.4, 8.8.8.8, 1.1.0.0, 1.1.1.1]

Any ideas what I am doing wrong?

Netplan, or rather yaml, is very fussy about indentation. The «nameservers» line needs to have the same (or possibly more) indentation as the «renderer» line, and the «addresses» line needs to be further indented than the «nameservers» line.

So, to tweak the example you’ve given, it should look like this:

# Let NetworkManager manage all devices on this systemnetwork:
version: 2
renderer: NetworkManager
nameservers:
addresses: [8.8.4.4, 8.8.8.8, 1.1.0.0, 1.1.1.1]

I don’t use NetworkManager, so I can’t be sure that you won’t need to make other changes, but try updating the formatting first and see if that does the job.

Thanks, I now get two new errors:

If I use four spaces as indentation — e.g:

# Let NetworkManager manage all devices on this systemnetwork:
version: 2
renderer: NetworkManager
nameservers:
addresses: [8.8.4.4, 8.8.8.8, 1.1.0.0, 1.1.1.1]

Invalid YAML at /etc/netplan/01-network-manager-all.yaml line 4 column 15: mapping values are not allowed in this context

If I use two spaces (to bring nameservers in line under renderer) or cut/paste irihapeti’s example (and correct the «network» being on the wrong line) — like this:

# Let NetworkManager manage all devices on this system
network:
version: 2
renderer: NetworkManager
nameservers:
addresses: [8.8.4.4, 8.8.8.8, 1.1.0.0, 1.1.1.1]

Error in network definition /etc/netplan/01-network-manager-all.yaml line 2 column 2: unknown key nameservers

Any ideas what I am doing wrong?Yes.

# Let NetworkManager manage all devices on this system
network:
version: 2
renderer: NetworkManager
. means what it says. It says and means, let NM do all the work; so long, I’m outa here, buh bye.

I suggest that you revert the faulty changes and simply make the changes in Network Manager:

# Let NetworkManager manage all devices on this system
network:
version: 2
renderer: NetworkManager
. means what it says. It says and means, let NM do all the work; so long, I’m outa here, buh bye.

I suggest that you revert the faulty changes and simply make the changes in Network Manager:

Thanks chilli555 — that’s bang-on. Made the changes in Network Manager and all is good — this has also (hopefully — I will test today) solved my other thread too.

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Error in network definition: expected mapping (check indentation) #58

tried to install opennebula on ubuntu 20 :

root@ziomario-I5:/home/ziomario/Scrivania# sudo bash minione

Checks & detection

Checking augeas is installed SKIP will try to install
Checking AppArmor SKIP will try to modify
Checking for present ssh key SKIP
Checking (iptables|netfilter)-persistent are installed SKIP will try to install

Main deployment steps:

Install OpenNebula frontend version 5.12
Configure bridge minionebr with IP 172.16.100.1/24
Enable NAT over enp3s0
Modify AppArmor
Install OpenNebula KVM node
Export appliance and update VM template
Install augeas-tools iptables-persistent netfilter-persistent

Do you agree? [yes/no]:
yes

Installation

Updating APT cache OK
Install augeas-tools iptables-persistent netfilter-persistent OK
Creating bridge interface minionebr OK
Bring bridge interfaces up FAILED

— STDERR —
/etc/netplan/01-network-manager-all.yaml:2:9: Error in network definition: expected mapping (check indentation)
network:
^

this is my 01-network-manager-all.yaml file :

Let NetworkManager manage all devices on this system

network:
version: 2
renderer: NetworkManager

#ethernets:
#eno1:
#dhcp4: no
#disable existing configuration for ethernet
#addresses: [10.0.0.30/24]
#gateway4: 10.0.0.1
#nameservers:
#addresses: [10.0.0.10]
#dhcp6: no

add configuration for bridge interface

#bridges:
#br0:
#interfaces: [eno1]
#dhcp4: no
#addresses: [10.0.0.30/24]
#gateway4: 10.0.0.1
#nameservers:
#addresses: [10.0.0.10]
#parameters:
#stp: false
#dhcp6: no

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Background

I’m using Ubuntu 18.04 server (on a laptop, for development) and am trying to get my wifi configured to work with an WPA-EAP network.

• To enable Wifi I followed the guide Wifi on Ubuntu 18 server

• I looked at the Netplan Examples (none with WPA-EAP )

• I’ve read the Netplan Full Documentation.

I’ve got netplan to work with an an open network, even with a password protected network, but haven’t been able to get it to work with WPA-EAP where both an identity and password are required.

Attempted Configuration

I’ve tried this in my /etc/netplan/config.yaml file:

network:
    wifis:
      wlp1s0:
        dhcp4: yes
        access-points:
          "My-Enterprise-Network":
            auth:
              key-management: eap
              identity: johndoe1
              password: pass1234

But when I run netplan apply I get:

Error in network definition /etc/netplan/config.yaml: unknown key auth

From the Documentation

From the online netplan documentation:

 The ``auth`` block supports the following properties:

 ``key-management`` (scalar)
 :    The supported key management modes are ``none`` (no key management);
      ``psk`` (WPA with pre-shared key, common for home wifi); ``eap`` (WPA
      with EAP, common for enterprise wifi); and ``802.1x`` (used primarily
      for wired Ethernet connections).

 ``password`` (scalar)
 :    The password string for EAP, or the pre-shared key for WPA-PSK.

 The following properties can be used if ``key-management`` is ``eap``
 or ``802.1x``:

 ``method`` (scalar)
 :    The EAP method to use. The supported EAP methods are ``tls`` (TLS),
      ``peap`` (Protected EAP), and ``ttls`` (Tunneled TLS).

 ``identity`` (scalar)
 :    The identity to use for EAP.

From man netplan

access-points (mapping)
      This  provides  pre-configured connections to NetworkManager.  
      Note that users can of course select other access points/SSIDs.  
      The keys of the mapping are the SSIDs, and the values are mappings
      with the following supported properties:

      password (scalar)
             Enable WPA2 authentication and set the passphrase for it.  
             If not given, the network is assumed to be open. 
             **Other authentication  modes  are not currently supported.**

Note the last line: Other authentication modes are not currently supported.

Questions

1. What’s the right way to use netplan with WPA-EAP?
2. Does Ubuntu 18.04 ship with an outdated version of netplan? ( netplan --version is not supported ) Hence perhaps why the online documentation has options that the man version does not?
3. If so, can I upgrade netplan to a more cutting edge release?
4. Or does netplan need to be used with something like a wpa_supplicant.conf to specify additional parameters?