openstack-manuals/doc/admin-guide-cloud/source/shared_file_systems_quotas.rst

Quotas and limits

Limits

Limits are the resource limitations that are allowed for each tenant (project). An administrator can configure limits in the manila.conf file.

Users can query their rate and absolute limits.

To see the absolute limits, run:

$ manila absolute-limits
+----------------------------+-------+
| Name                       | Value |
+----------------------------+-------+
| maxTotalShareGigabytes     | 1000  |
| maxTotalShareNetworks      | 10    |
| maxTotalShareSnapshots     | 50    |
| maxTotalShares             | 50    |
| maxTotalSnapshotGigabytes  | 1000  |
| totalShareGigabytesUsed    | 1     |
| totalShareNetworksUsed     | 2     |
| totalShareSnapshotsUsed    | 1     |
| totalSharesUsed            | 1     |
| totalSnapshotGigabytesUsed | 1     |
+----------------------------+-------+

Rate limits control the frequency at which users can issue specific API requests. Administrators use rate limiting to configure limits on the type and number of API calls that can be made in a specific time interval. For example, a rate limit can control the number of GET requests that can be processed during a one-minute period.

To set the API rate limits, add configuration to the etc/manila/api-paste.ini file that is a part of the WSGI pipeline and defines the actual limits. You need to restart manila-api service after you edit the etc/manila/api-paste.ini file.

[filter:ratelimit]
paste.filter_factory = manila.api.v1.limits:RateLimitingMiddleware.factory
limits = (POST, "*/shares", ^/shares, 120, MINUTE);(PUT, "*/shares", .*, 120, MINUTE);(DELETE, "*", .*, 120, MINUTE)

Also, add ratelimit to noauth, keystone, keystone_nolimit parameters in the [composite:openstack_share_api] group.

[composite:openstack_share_api]
noauth = faultwrap ssl ratelimit sizelimit noauth api
keystone = faultwrap ssl ratelimit sizelimit authtoken keystonecontext api
keystone_nolimit = faultwrap ssl ratelimit sizelimit authtoken keystonecontext api

To see the rate limits, run:

$ manila rate-limits
+--------+------------+-------+--------+--------+----------------------+
| Verb   | URI        | Value | Remain | Unit   | Next_Available       |
+--------+------------+-------+--------+--------+----------------------+
| DELETE | "*"        | 120   | 120    | MINUTE | 2015-10-20T15:17:20Z |
| POST   | "*/shares" | 120   | 120    | MINUTE | 2015-10-20T15:17:20Z |
| PUT    | "*/shares" | 120   | 120    | MINUTE | 2015-10-20T15:17:20Z |
+--------+------------+-------+--------+--------+----------------------+

Quotas

Quota sets provide quotas management support.

To list the quotas for a tenant or user, use the manila quota-show command. If you specify the optional --user parameter, you get the quotas for this user in the specified tenant. If you omit this parameter, you get the quotas for the specified project.

$ manila quota-show --tenant demo --user demo
+--------------------+-------+
| Property           | Value |
+--------------------+-------+
| gigabytes          | 1000  |
| snapshot_gigabytes | 1000  |
| snapshots          | 50    |
| shares             | 50    |
| share_networks     | 10    |
+--------------------+-------+

There are default quotas for a project that are set from the manila.conf file. To list the default quotas for a project, use the manila quota-defaults command:

$ manila quota-defaults --tenant demo
+--------------------+-------+
| Property           | Value |
+--------------------+-------+
| gigabytes          | 1000  |
| snapshot_gigabytes | 1000  |
| snapshots          | 50    |
| shares             | 50    |
| share_networks     | 10    |
+--------------------+-------+

The administrator can update the quotas for a specified tenant or for a specified user by providing both the --tenant and --user optional arguments. It is possible to update the snapshots, gigabytes, snapshot-gigabytes, and share-networks quotas.

$ manila quota-update demo --user demo --shares 49 --snapshots 49

As administrator, you can also permit or deny the force-update of a quota that is already used and the requested value exceeds the configured quota. To force-update a quota, use force optional key.

$ manila quota-update demo --shares 51 --snapshots 51 --force

To revert quotas to default for a project or for a user, delete quotas:

$ manila quota-delete --tenant demo --user demo