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 number of rules. 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.

1. 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.

2. 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                   |
   | ...                    | ...                    | ...                      |
   +------------------------+------------------------+--------------------------+
   

3. 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.

4. 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 |
   +------------+---------+------+--------+--------+----------------------------------+
   

5. 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    |
   +---------------------+-------+
   

6. 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    |
   +---------------------+-------+
   

7. 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.