Open Stack

After upgrading our kolla-ansible clusters from Queens to Train, we are seeing static routes when we create subnets. We didn’t see this in Queens. For example, in our de6 region we have a network called “trust” with 3 subnets:

Subnet                 CIDR                                   Gateway
trust-az1:             10.52.160.0/22   10.52.160.1
trust-az2:             10.52.164.0/22   10.52.164.1
trust-az3:             10.52.168.0/22   10.52.168.1

Each of these subnets has 2 entries under “host_routes:” that point to the other two subnets. For example, subnet trust-az1 has these two routes:

host_routes          | destination='10.52.164.0/22', gateway='10.52.160.1' |
|                      | destination='10.52.168.0/22', gateway='10.52.160.1' |

How can we prevent these host routes from being created in Train? Do we need to change something in our config?