Last week I was bit by exceeding my Port limit in Openstack Kilo. I understand how to query, change and in the future will setup my services to notify as this quota is approached...But what is this quota actually limiting?
From the documentation: "(IntOpt) Number of ports allowed per tenant. A negative value means unlimited."
Are there a number of virtual iscsi ports this is limiting? If so do I have a physical limit on my hardware that I might exceed if this becomes unlimited?
Or is this a number of IPs that can allocate from a range? (if so, why is it referred to as ports)
In my case the following:
[root@_regionOne_ ~]# neutron quota-show --tenant-id _projectUUID_ -c port
+-------+-------+
| Field | Value |
+-------+-------+
| port | 150 |
+-------+-------+
Was altered with:
[root@_regionOne_ ~]# neutron quota-show --tenant-id _projectUUID_ --port <new quota limit>
To solve the issue. But improving my understanding would be a much better solution!
Finally, I have an answer to that question, which was also interesting for me.
Port: A port in Neutron represents a virtual switch port on a logical virtual switch. Virtual machine interfaces are mapped to Neutron ports, and the ports define both the MAC address and the IP address to be assigned to the interface plugged into them. Neutron port definitions are stored in the Neutron database, which is then used by the receptive plugin agent to build and connect the virtual switching infrastructure.
From the book Learning OpenStack Networking.