Unable to prepend dns server to /etc/resolv.conf after upgrading to Fedora 31

[jsnjack (Yauhen Shulitski)]

Hi,

After upgrading from Fedora 30 to Fedora 31 prepending DNS servers to /etc/resolv.conf has stopped working. I have the following configuration to achieve it (used to work before):

$ cat /etc/dhcp/dhclient.conf
prepend domain-name-servers 127.0.0.1;

What is the new way of achieving the same?

[vgaetera (Vladislav Grigoryev)]

NetworkManager.conf: NetworkManager Reference Manual

dhcp

This key sets up what DHCP client NetworkManager will use. Allowed values are dhclient , dhcpcd , and internal . The dhclient and dhcpcd options require the indicated clients to be installed. The internal option uses a built-in DHCP client which is not currently as featureful as the external clients.

If this key is missing, it defaults to internal . It the chosen plugin is not available, clients are looked for in this order: dhclient , dhcpcd , internal .

Post the output:

rpm -q dhcp-client
grep -v -e "^#" -e "^$" /etc/NetworkManager/{*.conf,conf.d/*}

[jsnjack (Yauhen Shulitski)]

Thanks @vgaetera!

I created file /etc/NetworkManager/conf.d/10-dhcp.conf with the following content:

[main]
dhcp=dhclient

and it works again!