Description of problem:

When Customer used the variable net_config_override= on undercloud.conf on 17.1 since no keepalive is present anymore, the IPs for VIPs are not tacken from undercloud.conf if this IPs are not present on the custom json/yaml file used on net_config_override=

If you run openstack undercloud install, this will hang or get stuck when try DB sync because the VIPs will be missing.

~~~
TASK | Create containers managed by Podman for /var/lib/tripleo-config/container-startup-config/step_3
~~~

~~~
ERROR: Can't run container neutron_db_sync

oslo_db.exception.DBConnectionError: (pymysql.err.OperationalError) (2003, "Can't connect to MySQL server on '10.128.8.168' ([Errno 113] No route to host)")
~~~

Also this task never stop or timeout just hangs.

Workaround, is just add the vips (ips) on the File used on net_config_override=

exmaple

~~~
network_config:

• name: br-ctlplane
  type: ovs_bridge
  use_dhcp: false
  dns_servers:
• 172.16.0.1
• 10.0.0.1
  domain: lab.example.com
  ovs_extra:
• "br-set-external-id br-ctlplane bridge-id br-ctlplane"
  addresses:
• ip_netmask: 192.168.24.1/24
• ip_netmask: 192.168.24.2/32 <---------------------------|
• ip_netmask: 192.168.24.3/32 <---------------------------|
  members:
• type: interface
  name: eth0
  ~~~

This should be just a documentation bug ? or there is something else to be consider here ?

Version-Release number of selected component (if applicable):

RHOSP 17.1 (wallaby)

How reproducible:

• 100%

Steps to Reproduce:
1. Use net_config_override on undercloud.conf
2. Try openstack undercloud install on 17.1
3.

Actual results:

Deploys is hang/stuck on db sync

Expected results:

A success deploy

Additional info:

• SOS reports attached to the case
• templates attached to the case