Manage Networking service quotas

this page last updated: 2019-06-24 13:35:02

Manage Networking service quotas¶

A quota limits the number of available resources. A default quota might be enforced for all projects. When you try to create more resources than the quota allows, an error occurs:

$ openstack network create test_net
 Quota exceeded for resources: ['network']

Per-project quota configuration is also supported by the quota extension API. See Configure per-project quotas for details.

Basic quota configuration¶

In the Networking default quota mechanism, all projects have the same quota values, such as the number of resources that a project can create.

The quota value is defined in the OpenStack Networking /etc/neutron/neutron.conf configuration file. This example shows the default quota values:

[quotas]
# number of networks allowed per tenant, and minus means unlimited
quota_network = 10

# number of subnets allowed per tenant, and minus means unlimited
quota_subnet = 10

# number of ports allowed per tenant, and minus means unlimited
quota_port = 50

# default driver to use for quota checks
quota_driver = neutron.quota.ConfDriver

OpenStack Networking also supports quotas for L3 resources: router and floating IP. Add these lines to the quotas section in the /etc/neutron/neutron.conf file:

[quotas]
# number of routers allowed per tenant, and minus means unlimited
quota_router = 10

# number of floating IPs allowed per tenant, and minus means unlimited
quota_floatingip = 50

OpenStack Networking also supports quotas for security group resources: number of security groups and the number of rules for each security group. Add these lines to the quotas section in the /etc/neutron/neutron.conf file:

[quotas]
# number of security groups per tenant, and minus means unlimited
quota_security_group = 10

# number of security rules allowed per tenant, and minus means unlimited
quota_security_group_rule = 100

Configure per-project quotas¶

OpenStack Networking also supports per-project quota limit by quota extension API.

Todo

This document needs to be migrated to using openstack commands rather than the deprecated neutron commands.

Use these commands to manage per-project quotas:

neutron quota-delete: Delete defined quotas for a specified project
neutron quota-list: Lists defined quotas for all projects
neutron quota-show: Shows quotas for a specified project
neutron quota-default-show: Show default quotas for a specified tenant
neutron quota-update: Updates quotas for a specified project

Only users with the admin role can change a quota value. By default, the default set of quotas are enforced for all projects, so no quota-create command exists.

Configure Networking to show per-project quotas

Set the quota_driver option in the /etc/neutron/neutron.conf file.
```
quota_driver = neutron.db.quota_db.DbQuotaDriver
```
When you set this option, the output for Networking commands shows quotas.

List Networking extensions.

To list the Networking extensions, run this command:

$ openstack extension list --network

The command shows the quotas extension, which provides per-project quota management support.

Note

Many of the extensions shown below are supported in the Mitaka release and later.

+------------------------+------------------------+--------------------------+
| Name                   | Alias                  | Description              |
+------------------------+------------------------+--------------------------+
| ...                    | ...                    | ...                      |
| Quota management       | quotas                 | Expose functions for     |
| support                |                        | quotas management per    |
|                        |                        | tenant                   |
| ...                    | ...                    | ...                      |
+------------------------+------------------------+--------------------------+

Show information for the quotas extension.

To show information for the quotas extension, run this command:

$ neutron ext-show quotas
+-------------+------------------------------------------------------------+
| Field       | Value                                                      |
+-------------+------------------------------------------------------------+
| alias       | quotas                                                     |
| description | Expose functions for quotas management per tenant          |
| links       |                                                            |
| name        | Quota management support                                   |
| namespace   | https://docs.openstack.org/network/ext/quotas-sets/api/v2.0 |
| updated     | 2012-07-29T10:00:00-00:00                                  |
+-------------+------------------------------------------------------------+

Note

Only some plug-ins support per-project quotas. Specifically, Open vSwitch, Linux Bridge, and VMware NSX support them, but new versions of other plug-ins might bring additional functionality. See the documentation for each plug-in.

List projects who have per-project quota support.

The neutron quota-list command lists projects for which the per-project quota is enabled. The command does not list projects with default quota support. You must be an administrative user to run this command:

$ neutron quota-list
+------------+---------+------+--------+--------+----------------------------------+
| floatingip | network | port | router | subnet | tenant_id                        |
+------------+---------+------+--------+--------+----------------------------------+
|         20 |       5 |   20 |     10 |      5 | 6f88036c45344d9999a1f971e4882723 |
|         25 |      10 |   30 |     10 |     10 | bff5c9455ee24231b5bc713c1b96d422 |
+------------+---------+------+--------+--------+----------------------------------+

Show per-project quota values.

The neutron quota-show command reports the current set of quota limits for the specified project. Non-administrative users can run this command without the --tenant_id parameter. If per-project quota limits are not enabled for the project, the command shows the default set of quotas.

Note

Additional quotas added in the Mitaka release include security_group, security_group_rule, subnet, and subnetpool.

$ neutron quota-show --tenant_id 6f88036c45344d9999a1f971e4882723
+---------------------+-------+
| Field               | Value |
+---------------------+-------+
| floatingip          | 50    |
| network             | 10    |
| port                | 50    |
| rbac_policy         | 10    |
| router              | 10    |
| security_group      | 10    |
| security_group_rule | 100   |
| subnet              | 10    |
| subnetpool          | -1    |
+---------------------+-------+

The following command shows the command output for a non-administrative user.

$ neutron quota-show
+---------------------+-------+
| Field               | Value |
+---------------------+-------+
| floatingip          | 50    |
| network             | 10    |
| port                | 50    |
| rbac_policy         | 10    |
| router              | 10    |
| security_group      | 10    |
| security_group_rule | 100   |
| subnet              | 10    |
| subnetpool          | -1    |
+---------------------+-------+

Update quota values for a specified project.

Use the neutron quota-update command to update a quota for a specified project.

$ neutron quota-update --tenant_id 6f88036c45344d9999a1f971e4882723 --network 5
+---------------------+-------+
| Field               | Value |
+---------------------+-------+
| floatingip          | 50    |
| network             | 5     |
| port                | 50    |
| rbac_policy         | 10    |
| router              | 10    |
| security_group      | 10    |
| security_group_rule | 100   |
| subnet              | 10    |
| subnetpool          | -1    |
+---------------------+-------+

You can update quotas for multiple resources through one command.

$ neutron quota-update --tenant_id 6f88036c45344d9999a1f971e4882723 --subnet 5 --port 20
+---------------------+-------+
| Field               | Value |
+---------------------+-------+
| floatingip          | 50    |
| network             | 5     |
| port                | 20    |
| rbac_policy         | 10    |
| router              | 10    |
| security_group      | 10    |
| security_group_rule | 100   |
| subnet              | 5     |
| subnetpool          | -1    |
+---------------------+-------+

To update the limits for an L3 resource such as, router or floating IP, you must define new values for the quotas after the -- directive.

This example updates the limit of the number of floating IPs for the specified project.

$ neutron quota-update --tenant_id 6f88036c45344d9999a1f971e4882723 --floatingip 20
+---------------------+-------+
| Field               | Value |
+---------------------+-------+
| floatingip          | 20    |
| network             | 5     |
| port                | 20    |
| rbac_policy         | 10    |
| router              | 10    |
| security_group      | 10    |
| security_group_rule | 100   |
| subnet              | 5     |
| subnetpool          | -1    |
+---------------------+-------+

You can update the limits of multiple resources by including L2 resources and L3 resource through one command:

$ neutron quota-update --tenant_id 6f88036c45344d9999a1f971e4882723 \
  --network 3 --subnet 3 --port 3 --floatingip 3 --router 3
+---------------------+-------+
| Field               | Value |
+---------------------+-------+
| floatingip          | 3     |
| network             | 3     |
| port                | 3     |
| rbac_policy         | 10    |
| router              | 3     |
| security_group      | 10    |
| security_group_rule | 100   |
| subnet              | 3     |
| subnetpool          | -1    |
+---------------------+-------+

Delete per-project quota values.

To clear per-project quota limits, use the neutron quota-delete command.

$ neutron quota-delete --tenant_id 6f88036c45344d9999a1f971e4882723
 Deleted quota: 6f88036c45344d9999a1f971e4882723

After you run this command, you can see that quota values for the project are reset to the default values.

$ openstack quota show 6f88036c45344d9999a1f971e4882723
+---------------------+-------+
| Field               | Value |
+---------------------+-------+
| floatingip          | 50    |
| network             | 10    |
| port                | 50    |
| rbac_policy         | 10    |
| router              | 10    |
| security_group      | 10    |
| security_group_rule | 100   |
| subnet              | 10    |
| subnetpool          | -1    |
+---------------------+-------+

Note

Listing defualt quotas with the OpenStack command line client will provide all quotas for networking and other services. Previously, the neutron quota-show --tenant_id would list only networking quotas.

this page last updated: 2019-06-24 13:35:02

Except where otherwise noted, this document is licensed under Creative Commons Attribution 3.0 License. See all OpenStack Legal Documents.