community.general nmcli: Allow appending DNS nameserver (nmcli conn modify +ipv4.dns / +ipv6.dns)

nmcli: Allow appending DNS nameserver (nmcli conn modify +ipv4.dns / +ipv6.dns)

Open nemobis opened this issue 3 years ago • 2 comments

Summary

In recent nmcli it's possible to issue a command which only appends new nameservers, as in the example:

nmcli con mod my-con-em1 +ipv4.dns 1.2.3.4

https://man.archlinux.org/man/nmcli-examples.7.en

It would be nice for the nmcli module to be able to issue that command with a slight extension of the existing syntax like:

  - name: Add two IPv4 DNS server addresses, remove one
    nmcli:
      conn_name: my-eth1
      type: ethernet
      dns4:
      - +1.2.3.4
      - +5.6.7.8
      - -9.8.7.6
      state: present

Issue Type

Feature Idea

Component Name

nmcli

Additional Information

I want to add extra nameservers to a connection on a virtual machine which is configured through cloud-init and dhcpclient (which makes it unwise to touch /etc/resolv.conf and /etc/dhcp/dhclient.conf ).

The dns4 / dns6 parameter works fine, as per https://docs.ansible.com/ansible/2.9/modules/nmcli_module.html#parameter-dns4 , but completely removes the pre-existing nameserver, which I'd like to keep.

Moved from https://github.com/ansible/ansible/issues/78184