CentOS - Apr 2016 - How to configure DNS server in RHEL 7 / CentOS 7

How to configure DNS server and search domain common for all network
interfaces not per device?


The only reliable way I found we can set DNS name server and search domain
in CentOS 7 is using nmcli which adds DNS name server and search domain to *a
specific interface*, e.g. nmcli con mod eth0 +ipv4.dns [IP_ADDRESS]. But I
want to set them for all interfaces weather they are configure and
connected or not. How can we do that?

More back ground information: I am using NetworkManager and nmcli tool to
configure multiple wired Ethernet interfaces on CentOS 7. I want to set
common DNS name server and search domain for all interfaces.
/etc/resolv.conf is generated by NetworkManger and we cannot manually
modify it.

Thanks,
Joe

On 5 April 2016 at 20:16, Joe Smithian <joe.smithian at gmail.com> wrote:
> How to configure DNS server and search domain common for all network
> interfaces not per device?
>
>
> The only reliable way I found we can set DNS name server and search domain
> in CentOS 7 is using nmcli which adds DNS name server and search domain to
> *a
> specific interface*, e.g. nmcli con mod eth0 +ipv4.dns [IP_ADDRESS]. But I
> want to set them for all interfaces weather they are configure and
> connected or not. How can we do that?
>
> More back ground information: I am using NetworkManager and nmcli tool to
> configure multiple wired Ethernet interfaces on CentOS 7. I want to set
> common DNS name server and search domain for all interfaces.
> /etc/resolv.conf is generated by NetworkManger and we cannot manually
> modify it.
>
>
>
Since the entries end up in /etc/resolv.conf they are not per interface ...

You can always set PEERDNS=no and configure /etc/resolv.conf manually or
with your CM tool of choice