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Description of problem:

When DNS is configured on the interface with static default gateway,

applying the empty state via libnmstate or nmstatectl will cause OS lose
the static default gateway.


Version-Release number of selected component (if applicable):
nmstate-0.0.8-12.el8

How reproducible:
100%

Steps to Reproduce:
1. Set a interface with static address, default gateway, dns nameserver using nmcli or this nmsate state file :


---
dns-resolver:
  config:
    search: []
    server:
    - 192.168.122.1
routes:
  config:
  - destination: 0.0.0.0/0
    next-hop-address: 192.168.122.1
    next-hop-interface: eth1
interfaces:
- name: eth1
  type: ethernet
  state: up
  ipv4:
    address:
    - ip: 192.168.122.8
      prefix-length: 24
    dhcp: false
    enabled: true


2. Apply the empty state via nmstatectl.

3. Use `ip route` to check the static default gateway.

Actual results:

The static default gateway gone.

Expected results:

The static default gateway is untouched.

Additional info:

Move to RHEL 8.2

*** Bug 1792098 has been marked as a duplicate of this bug. ***

Upstream tracker: https://github.com/nmstate/nmstate/issues/942

Created attachment 1699094 [details]
verified.log

verified with versions:
nmstate-0.3.2-1.el8.noarch
NetworkManager-1.26.0-0.1.el8.x86_64
DISTRO=RHEL-8.3.0-20200629.n.0
Linux hp-dl380pg8-09.rhts.eng.pek2.redhat.com 4.18.0-221.el8.x86_64 #1 SMP Thu Jun 25 20:58:19 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (nmstate bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:4696