Unified Limits Quotas¶
Since the Nova 28.0.0 (2023.2 Bobcat) release, it is recommended to use Keystone unified limits for Nova quota limits.
For information about legacy quota limits, see the legacy quota documentation.
Nova uses a quota system for setting limits on resources such as number of instances or amount of CPU that a specific project or user can use.
Quota limits are set by admin and retrieved for enforcement using the Keystone API.
Types of quota¶
Quota name |
Description |
---|---|
class:VCPU |
Number of instance cores (VCPUs) allowed per project. |
servers |
Number of instances allowed per project. |
server_key_pairs |
Number of key pairs allowed per user. |
server_metadata_items |
Number of metadata items allowed per instance. |
class:MEMORY_MB |
Megabytes of instance ram allowed per project. |
server_groups |
Number of server groups per project. |
server_group_members |
Number of servers per server group. |
class:DISK_GB |
Gigabytes of instance disk allowed per project. |
class:<any resource in the placement service> |
Any resource in the placement service that is allocated by Nova can have a quota limit specified for it. Example: class:VGPU. |
The following quotas were previously available but were removed in microversion 2.36 as they proxied information available from the networking service.
Quota name |
Description |
---|---|
fixed_ips |
Number of fixed IP addresses allowed per project. This number must be equal to or greater than the number of allowed instances. |
floating_ips |
Number of floating IP addresses allowed per project. |
networks |
Number of networks allowed per project (no longer used). |
security_groups |
Number of security groups per project. |
security_group_rules |
Number of security group rules per project. |
Similarly, the following quotas were previously available but were removed in microversion 2.57 as the personality files feature was deprecated.
Quota name |
Description |
---|---|
injected_files |
Number of injected files allowed per project. |
injected_file_content_bytes |
Number of content bytes allowed per injected file. |
injected_file_path_bytes |
Length of injected file path. |
Usage¶
Project quotas¶
To list all default quotas for projects, run:
$ openstack registered limit list
Note
This lists default quotas for all services and not just nova.
For example:
$ openstack registered limit list
+----------------------------------+----------------------------------+------------------------------------+---------------+-------------+-----------+
| ID | Service ID | Resource Name | Default Limit | Description | Region ID |
+----------------------------------+----------------------------------+------------------------------------+---------------+-------------+-----------+
| eeee406035fc4a7892c6fc6fcc76e61a | b5d97619e6354c03be50c6b1589e6547 | image_size_total | 1000 | None | RegionOne |
| b99d35b1b7b74cd0a26a6311963328af | b5d97619e6354c03be50c6b1589e6547 | image_stage_total | 1000 | None | RegionOne |
| 70945789dad24082bc2a8cdbf53a5091 | b5d97619e6354c03be50c6b1589e6547 | image_count_total | 100 | None | RegionOne |
| 908d86c0ac3f46d0bb45ed9194710ea7 | b5d97619e6354c03be50c6b1589e6547 | image_count_uploading | 100 | None | RegionOne |
| be6dfeebb7c340e8b93b602d41fbff9b | 8b22bf8a66fa4524a522b2a21865bbf2 | servers | 10 | None | None |
| 8a658096236549788e61f4fcbd5a4a12 | 8b22bf8a66fa4524a522b2a21865bbf2 | class:VCPU | 20 | None | None |
| 63890db7d6a14401ba55e7f7022b95d0 | 8b22bf8a66fa4524a522b2a21865bbf2 | class:MEMORY_MB | 51200 | None | None |
| 221ba1c19d2c4272952663828d659013 | 8b22bf8a66fa4524a522b2a21865bbf2 | server_metadata_items | 128 | None | None |
| 8e61cabd2e854a11bdd2cf94efd702d1 | 8b22bf8a66fa4524a522b2a21865bbf2 | server_injected_files | 5 | None | None |
| 3d259390f70e4e9b88ecb2b0fa075f9b | 8b22bf8a66fa4524a522b2a21865bbf2 | server_injected_file_content_bytes | 10240 | None | None |
| a12e10b991cc4bdd8e6ff30f6e6c15ac | 8b22bf8a66fa4524a522b2a21865bbf2 | server_injected_file_path_bytes | 255 | None | None |
| a32a9080be6b4a5481c16a91fe329e6f | 8b22bf8a66fa4524a522b2a21865bbf2 | server_key_pairs | 100 | None | None |
| 86408bb7a0e542b18404ec7d348da820 | 8b22bf8a66fa4524a522b2a21865bbf2 | server_groups | 10 | None | None |
| 17c4552c5aad4afca4813f37530fc897 | 8b22bf8a66fa4524a522b2a21865bbf2 | server_group_members | 10 | None | None |
+----------------------------------+----------------------------------+------------------------------------+---------------+-------------+-----------+
To list the currently set quota values for your project, run:
$ openstack limit list
For example:
$ openstack limit list
+----------------------------------+----------------------------------+----------------------------------+---------------+----------------+-------------+-----------+
| ID | Project ID | Service ID | Resource Name | Resource Limit | Description | Region ID |
+----------------------------------+----------------------------------+----------------------------------+---------------+----------------+-------------+-----------+
| 8b3364b2241e4090aaaa49355c7a5b56 | 5cd3281595a9497ba87209701cd9f3f2 | 8b22bf8a66fa4524a522b2a21865bbf2 | class:VCPU | 5 | None | None |
+----------------------------------+----------------------------------+----------------------------------+---------------+----------------+-------------+-----------+