[fuelmenu] Gateway unset by l23network if change ip address

[Artem Hrechanychenko]

ISO # 571, KVM

Steps to reproduce:
1. Install Fuel with default settings and kernel parameters (1 net interface)
2. Enter fuel-menu by executing #fuelmenu
3. Switch to Network Settings tab and enter new values in IP Address
4. Apply
5. Save end quit from fuel menu

Expected result:
IP address setting on the top of the tab contain the same value entered earlier

Actual result:
The input field is empty.
'Gateway: None' displayed in the top part of the tab, in interface settings.

The same behavior reproduce twice:
1)install master, save snapshot, try to reproduce
2) revert snapshot with "default master" , try to reproduce

screenshot from fuelmenu[0][1]

route table and ping 8.8.8.8 after quit from fuelmenu[2]

screenshots
[0]http://snag.gy/ckwhW.jpg
[1]http://snag.gy/hq9Zq.jpg
[2]http://snag.gy/3wQEz.jpg

[Matthew Mosesohn (raytrac3r)]

This was caused by l23network. I have a bash session showing applying changes breaking default gateway here:

http://paste.openstack.org/show/vgbPeyYKdTlIHXgFT6WX/

[Oleksiy Molchanov (omolchanov)]

This issue happens when ip address is being deleted/added, but gateway there is no flag to recreate a gateway.

[Dmitry Bilunov (dbilunov)]

Gateway gets removed by NetworkManager, because new addresses are not reflected in its configs.