Automatically create subdomain with a domain preset whenever a floating IP is assigned to Virtual Machine
Setting the DNS of Network
Goto Admin > Network > Networks, click on the Network Name from the list of your Networks then hit the action button EDIT SUBNET, go to Subnet Details and type in your DNS Name Servers, it should be your controller IP address or VIP and SAVE
Create DNS Zone
Goto Project > DNS > Zones, click on the CREATE ZONE
- create zone with a preferred/registered domain name
Connect to console
$ ssh [email protected]
Warning: Permanently added '192.168.1.210' (ECDSA) to the list of known hosts.
Password:
Welcome to the Cube Appliance
Setting a prefix dns_domain on a private network through CLI
sky1> iaas
sky1:iaas> network
sky1:network> network_set
Select domain:
1: Default
Enter index: 1
Select tenant:
1: admin
2: bigstack
3: WISE-STACK
Enter index: 2
Select network:
1: bigstack_pri_192_168_10_0
Enter index: 1
Select type:
1: name
2: description
3: qos-policy
4: no-qos-policy
5: dns-domain
6: no-dns-domain
Enter index: 5
Input value: bigstack.local.
Updated network: ee81ff3d-1e3b-4b70-8075-d0f270c29fac
Check up the dns_domain prefix
sky1:network> network_show
Select domain:
1: Default
Enter index: 1
Select tenant:
1: admin
2: bigstack
3: WISE-STACK
Enter index: 2
Select network:
1: bigstack_pri_192_168_10_0
Enter index: 1
+---------------------------+-----------------------------------------------------------------------------------------------------------------------------------------+
| Field | Value |
+---------------------------+-----------------------------------------------------------------------------------------------------------------------------------------+
| admin_state_up | UP |
| availability_zone_hints | |
| availability_zones | |
| created_at | 2020-11-26T06:27:34Z |
| description | |
| dns_domain | bigstack.local. |
| id | ee81ff3d-1e3b-4b70-8075-d0f270c29fac |
| ipv4_address_scope | None |
| ipv6_address_scope | None |
| is_default | None |
| is_vlan_transparent | None |
| location | cloud='', project.domain_id=, project.domain_name=, project.id='542b2c80d2164f36a0cfc49d6d92e2db', project.name=, region_name='', zone= |
| mtu | 1442 |
| name | bigstack_pri_192_168_10_0 |
| port_security_enabled | True |
| project_id | 542b2c80d2164f36a0cfc49d6d92e2db |
| provider:network_type | geneve |
| provider:physical_network | None |
| provider:segmentation_id | 5 |
| qos_policy_id | None |
| revision_number | 3 |
| router:external | Internal |
| segments | None |
| shared | False |
| status | ACTIVE |
| subnets | 36c271f5-e652-43d5-930f-09a43b667a1d |
| tags | |
| updated_at | 2020-11-26T08:48:27Z |
+---------------------------+-----------------------------------------------------------------------------------------------------------------------------------------+
Associate Floating IP to your Instances
Goto Project > Compute > Instances, click on the ASSOCIATE FLOATING IP from the Actions
An IP 10.32.3.234 has been associated to your instance test-3
Check the zone record set of bigstack.local.
A Record has been created according to your instance's hostname test-3.bigstack.local.
Check the DNS with nslookup
open a terminal and run
nslookup test-3.bigstack.local. 10.32.2.220❯ nslookup test-3.bigstack.local. 10.32.2.220 Server: 10.32.2.220 Address: 10.32.2.220#53 Name: test-3.bigstack.local Address: 10.32.3.234
Summary
In this use case, the address of a floating IP is published in the external DNS service in conjunction with the dns_name of its associated port and the dns_domain of the port’s network. The steps to execute in this use case are the following:
- Assign a valid domain name to the network’s dns_domain attribute. This name must end with a period (.).
- Boot an instance or alternatively, create a port specifying a valid value to its dns_name attribute. If the port is going to be used for an instance boot, the value assigned to dns_name must be equal to the hostname that the Compute service will assign to the instance. Otherwise, the boot will fail.
- Create a floating IP and associate it to the port.