Hi,
I am using GRE tunneling and OVS and have several instances working
perfectly. They get private IP addresses (range: 10.0.0.0/24) and get
routed through my local IP subnet (192.168.22.0/24) out via my HW router's
192.168.22.1. This setup works good and I am pretty happy with it.
What bothers me is the case where I need to delegate some of our instances
a direct public IP address, without the need for any NAT whatsoever.
Let's declare this public subnet as: 102.203.103.80/29
I have created a new network:
+---------------------------+--------------------------------------+
| Field | Value |
+---------------------------+--------------------------------------+
| admin_state_up | True |
| id | 50ad28c9-6a7d-4579-8339-a39f29cc4485 |
| name | inet |
| provider:network_type | local |
| provider:physical_network | |
| provider:segmentation_id | |
| router:external | True |
| shared | False |
| status | ACTIVE |
| subnets | 6d27b5fa-191e-473e-9852-cbf47a62188e |
| tenant_id | a0edd2a531bb41e6b17e0fd644bfd494 |
+---------------------------+--------------------------------------+
and then assigned a subnet inside:
+------------------+------------------------------------------------------+
| Field | Value |
+------------------+------------------------------------------------------+
| allocation_pools | {"start": "102.203.103.84", "end": "102.203.103.86"} |
| cidr | 102.203.103.80/29 |
| dns_nameservers | 8.8.8.8 |
| enable_dhcp | False |
| gateway_ip | |
| host_routes | |
| id | 6d27b5fa-191e-473e-9852-cbf47a62188e |
| ip_version | 4 |
| name | inet |
| network_id | 50ad28c9-6a7d-4579-8339-a39f29cc4485 |
| tenant_id | a0edd2a531bb41e6b17e0fd644bfd494 |
+------------------+------------------------------------------------------+
When I create a new instance (CirrOS) and delegate this newly created
network to it and then set IP
102.203.103.84/29 inside it, I am unable to ping our router's public IP
address, it doesn't work.
I have tried to create it as a flat network, but I don't currently have
physnet interface defined in ovs_neutron_plugin.ini and when I did it, my
private NAT setup stopped working.
My current ovs_neutron_plugin.ini on controller:
[ovs]
tenant_network_type = gre
tunnel_id_ranges = 1:1000
enable_tunneling = True
local_ip = 192.168.22.10
integration_bridge = br-int
tunnel_bridge = br-tun
tunnel_types=gre
[agent]
polling_interval = 2
[securitygroup]
firewall_driver =
neutron.agent.linux.iptables_firewall.OVSHybridIptablesFirewallDriver
What is the right way to achieve this public IP assignment I would like to
do? After reading a lot of docs, I still don't have any working solutions
for it.
Thank you very much for any ideas and help. If you need any other
information, I will be happy to provide it.
Matej
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