Problems with order of DNS nameservers in Red Hat Enterprise Linux OpenStack Platform 7
Issue
In Red Hat Enterprise Linux OpenStack Platform 7, instances need to point to 2 different DNS servers, e.g. 8.8.8.8 and 8.8.4.4, 8.8.8.8 as the primary and 8.8.4.4 as the secodary.
It is not possible to choose the primary vs the secondary nameserver:
neutron subnet-update <SUBNET-UUID> --dns_nameservers list=true 8.8.8.8 8.8.4.4
Produces:
[stack@undercloud ~]$ neutron subnet-show <SUBNET-UUID>
+-------------------+----------------------------------------------------+
| Field | Value |
+-------------------+----------------------------------------------------+
| allocation_pools | {"start": "192.168.0.2", "end": "192.168.0.200"} |
| cidr | 192.168.0.0/24 |
| dns_nameservers | 8.8.4.4 |
| | 8.8.8.8 |
| enable_dhcp | True |
| gateway_ip | 192.168.0.254 |
| host_routes | |
| id | <SUBNET-UUID> |
| ip_version | 4 |
| ipv6_address_mode | |
| ipv6_ra_mode | |
| name | subnet-name |
| network_id | <NETWORK-UUID> |
| subnetpool_id | |
| tenant_id | <TENANT-UUID> |
+-------------------+----------------------------------------------------+
The following produces the same order
[stack@undercloud ~]$ neutron subnet-update <SUBNET-UUID> --dns_nameservers list=true 8.8.4.4 8.8.8.8
[stack@undercloud ~]$ neutron subnet-show <SUBNET-UUID>
+-------------------+----------------------------------------------------+
| Field | Value |
+-------------------+----------------------------------------------------+
| allocation_pools | {"start": "192.168.0.2", "end": "192.168.0.200"} |
| cidr | 192.168.0.0/24 |
| dns_nameservers | 8.8.4.4 |
| | 8.8.8.8 |
| enable_dhcp | True |
| gateway_ip | 192.168.0.254 |
| host_routes | |
| id | <SUBNET-UUID> |
| ip_version | 4 |
| ipv6_address_mode | |
| ipv6_ra_mode | |
| name | subnet-name |
| network_id | <NETWORK-UUID> |
| subnetpool_id | |
| tenant_id | <TENANT-UUID> |
+-------------------+----------------------------------------------------+
Environment
Red Hat Enterprise Linux OpenStack Platform 7.0
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