CSIStorageCapacity [storage.k8s.io/v1] - Storage <strong>api</strong>s | <strong>api</strong> reference

Specification
api endpoints

Description

CSIStorageCapacity stores the result of one CSI GetCapacity call. For a given StorageClass, this describes the available capacity in a particular topology segment. This can be used when considering where to instantiate new PersistentVolumes.

For example this can express things like: - StorageClass "standard" has "1234 GiB" available in "topology.kubernetes.io/zone=us-east1" - StorageClass "localssd" has "10 GiB" available in "kubernetes.io/hostname=knode-abc123"

The following three cases all imply that no capacity is available for a certain combination: - no object exists with suitable topology and storage class name - such an object exists, but the capacity is unset - such an object exists, but the capacity is zero

The producer of these objects can decide which approach is more suitable.

They are consumed by the kube-scheduler when a CSI driver opts into capacity-aware scheduling with CSIDriverSpec.StorageCapacity. The scheduler compares the MaximumVolumeSize against the requested size of pending volumes to filter out unsuitable nodes. If MaximumVolumeSize is unset, it falls back to a comparison against the less precise Capacity. If that is also unset, the scheduler assumes that capacity is insufficient and tries some other node.

Type

object

Required

storageClassName

Specification

Property Type Description

Property	Type	Description
`apiVersion`	`string`	apiVersion defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources
`capacity`	`Quantity`	capacity is the value reported by the CSI driver in its GetCapacityResponse for a GetCapacityRequest with topology and parameters that match the previous fields. The semantic is currently (CSI spec 1.2) defined as: The available capacity, in bytes, of the storage that can be used to provision volumes. If not set, that information is currently unavailable.
`kind`	`string`	Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds
`maximumVolumeSize`	`Quantity`	maximumVolumeSize is the value reported by the CSI driver in its GetCapacityResponse for a GetCapacityRequest with topology and parameters that match the previous fields. This is defined since CSI spec 1.4.0 as the largest size that may be used in a CreateVolumeRequest.capacity_range.required_bytes field to create a volume with the same parameters as those in GetCapacityRequest. The corresponding value in the Kubernetes api is ResourceRequirements.Requests in a volume claim.
`metadata`	`ObjectMeta`	Standard object’s metadata. The name has no particular meaning. It must be a DNS subdomain (dots allowed, 253 characters). To ensure that there are no conflicts with other CSI drivers on the cluster, the recommendation is to use csisc-<uuid>, a generated name, or a reverse-domain name which ends with the unique CSI driver name. Objects are namespaced. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata
`nodeTopology`	`LabelSelector`	nodeTopology defines which nodes have access to the storage for which capacity was reported. If not set, the storage is not accessible from any node in the cluster. If empty, the storage is accessible from all nodes. This field is immutable.
`storageClassName`	`string`	storageClassName represents the name of the StorageClass that the reported capacity applies to. It must meet the same requirements as the name of a StorageClass object (non-empty, DNS subdomain). If that object no longer exists, the CSIStorageCapacity object is obsolete and should be removed by its creator. This field is immutable.

apiVersion

string

apiVersion defines the versioned schema of this representation of an object. Servers should convert recognized schemas to the latest internal value, and may reject unrecognized values. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources

capacity

Quantity

capacity is the value reported by the CSI driver in its GetCapacityResponse for a GetCapacityRequest with topology and parameters that match the previous fields.

The semantic is currently (CSI spec 1.2) defined as: The available capacity, in bytes, of the storage that can be used to provision volumes. If not set, that information is currently unavailable.

kind

string

Kind is a string value representing the REST resource this object represents. Servers may infer this from the endpoint the client submits requests to. Cannot be updated. In CamelCase. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds

maximumVolumeSize

Quantity

maximumVolumeSize is the value reported by the CSI driver in its GetCapacityResponse for a GetCapacityRequest with topology and parameters that match the previous fields.

This is defined since CSI spec 1.4.0 as the largest size that may be used in a CreateVolumeRequest.capacity_range.required_bytes field to create a volume with the same parameters as those in GetCapacityRequest. The corresponding value in the Kubernetes api is ResourceRequirements.Requests in a volume claim.

metadata

ObjectMeta

Standard object’s metadata. The name has no particular meaning. It must be a DNS subdomain (dots allowed, 253 characters). To ensure that there are no conflicts with other CSI drivers on the cluster, the recommendation is to use csisc-<uuid>, a generated name, or a reverse-domain name which ends with the unique CSI driver name.

Objects are namespaced.

More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata

nodeTopology

LabelSelector

nodeTopology defines which nodes have access to the storage for which capacity was reported. If not set, the storage is not accessible from any node in the cluster. If empty, the storage is accessible from all nodes. This field is immutable.

storageClassName

string

storageClassName represents the name of the StorageClass that the reported capacity applies to. It must meet the same requirements as the name of a StorageClass object (non-empty, DNS subdomain). If that object no longer exists, the CSIStorageCapacity object is obsolete and should be removed by its creator. This field is immutable.

api endpoints

The following api endpoints are available:

/apis/storage.k8s.io/v1/csistoragecapacities
- GET: list or watch objects of kind CSIStorageCapacity
/apis/storage.k8s.io/v1/watch/csistoragecapacities
- GET: watch individual changes to a list of CSIStorageCapacity. deprecated: use the 'watch' parameter with a list operation instead.
/apis/storage.k8s.io/v1/namespaces/{namespace}/csistoragecapacities
- DELETE: delete collection of CSIStorageCapacity
- GET: list or watch objects of kind CSIStorageCapacity
- POST: create a CSIStorageCapacity
/apis/storage.k8s.io/v1/watch/namespaces/{namespace}/csistoragecapacities
- GET: watch individual changes to a list of CSIStorageCapacity. deprecated: use the 'watch' parameter with a list operation instead.
/apis/storage.k8s.io/v1/namespaces/{namespace}/csistoragecapacities/{name}
- DELETE: delete a CSIStorageCapacity
- GET: read the specified CSIStorageCapacity
- PATCH: partially update the specified CSIStorageCapacity
- PUT: replace the specified CSIStorageCapacity
/apis/storage.k8s.io/v1/watch/namespaces/{namespace}/csistoragecapacities/{name}
- GET: watch changes to an object of kind CSIStorageCapacity. deprecated: use the 'watch' parameter with a list operation instead, filtered to a single item with the 'fieldSelector' parameter.

/apis/storage.k8s.io/v1/csistoragecapacities

HTTP method: GET
Description: list or watch objects of kind CSIStorageCapacity

Table 1. HTTP responses
HTTP code	Reponse body
200 - OK	`CSIStorageCapacityList` schema
401 - Unauthorized	Empty

/apis/storage.k8s.io/v1/watch/csistoragecapacities

HTTP method: GET
Description: watch individual changes to a list of CSIStorageCapacity. deprecated: use the 'watch' parameter with a list operation instead.

Table 2. HTTP responses
HTTP code	Reponse body
200 - OK	`WatchEvent` schema
401 - Unauthorized	Empty

/apis/storage.k8s.io/v1/namespaces/{namespace}/csistoragecapacities

HTTP method: DELETE
Description: delete collection of CSIStorageCapacity

Table 3. Query parameters
Parameter	Type	Description
`dryRun`	`string`	When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed

Table 4. HTTP responses
HTTP code	Reponse body
200 - OK	`Status` schema
401 - Unauthorized	Empty

HTTP method: GET
Description: list or watch objects of kind CSIStorageCapacity

Table 5. HTTP responses
HTTP code	Reponse body
200 - OK	`CSIStorageCapacityList` schema
401 - Unauthorized	Empty

HTTP method: POST
Description: create a CSIStorageCapacity

Table 6. Query parameters
Parameter	Type	Description
`dryRun`	`string`	When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed
`fieldValidation`	`string`	fieldValidation instructs the server on how to handle objects in the request (POST/PUT/PATCH) containing unknown or duplicate fields. Valid values are: - Ignore: This will ignore any unknown fields that are silently dropped from the object, and will ignore all but the last duplicate field that the decoder encounters. This is the default behavior prior to v1.23. - Warn: This will send a warning via the standard warning response header for each unknown field that is dropped from the object, and for each duplicate field that is encountered. The request will still succeed if there are no other errors, and will only persist the last of any duplicate fields. This is the default in v1.23+ - Strict: This will fail the request with a BadRequest error if any unknown fields would be dropped from the object, or if any duplicate fields are present. The error returned from the server will contain all unknown and duplicate fields encountered.

Table 7. Body parameters
Parameter	Type	Description
`body`	`CSIStorageCapacity` schema

Table 8. HTTP responses
HTTP code	Reponse body
200 - OK	`CSIStorageCapacity` schema
201 - Created	`CSIStorageCapacity` schema
202 - Accepted	`CSIStorageCapacity` schema
401 - Unauthorized	Empty

/apis/storage.k8s.io/v1/watch/namespaces/{namespace}/csistoragecapacities

HTTP method: GET
Description: watch individual changes to a list of CSIStorageCapacity. deprecated: use the 'watch' parameter with a list operation instead.

Table 9. HTTP responses
HTTP code	Reponse body
200 - OK	`WatchEvent` schema
401 - Unauthorized	Empty

/apis/storage.k8s.io/v1/namespaces/{namespace}/csistoragecapacities/{name}

Table 10. Global path parameters
Parameter	Type	Description
`name`	`string`	name of the CSIStorageCapacity

HTTP method: DELETE
Description: delete a CSIStorageCapacity

Table 11. Query parameters
Parameter	Type	Description
`dryRun`	`string`	When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed

Table 12. HTTP responses
HTTP code	Reponse body
200 - OK	`Status` schema
202 - Accepted	`Status` schema
401 - Unauthorized	Empty

HTTP method: GET
Description: read the specified CSIStorageCapacity

Table 13. HTTP responses
HTTP code	Reponse body
200 - OK	`CSIStorageCapacity` schema
401 - Unauthorized	Empty

HTTP method: PATCH
Description: partially update the specified CSIStorageCapacity

Table 14. Query parameters
Parameter	Type	Description
`dryRun`	`string`	When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed
`fieldValidation`	`string`	fieldValidation instructs the server on how to handle objects in the request (POST/PUT/PATCH) containing unknown or duplicate fields. Valid values are: - Ignore: This will ignore any unknown fields that are silently dropped from the object, and will ignore all but the last duplicate field that the decoder encounters. This is the default behavior prior to v1.23. - Warn: This will send a warning via the standard warning response header for each unknown field that is dropped from the object, and for each duplicate field that is encountered. The request will still succeed if there are no other errors, and will only persist the last of any duplicate fields. This is the default in v1.23+ - Strict: This will fail the request with a BadRequest error if any unknown fields would be dropped from the object, or if any duplicate fields are present. The error returned from the server will contain all unknown and duplicate fields encountered.

Table 15. HTTP responses
HTTP code	Reponse body
200 - OK	`CSIStorageCapacity` schema
201 - Created	`CSIStorageCapacity` schema
401 - Unauthorized	Empty

HTTP method: PUT
Description: replace the specified CSIStorageCapacity

Table 16. Query parameters
Parameter	Type	Description
`dryRun`	`string`	When present, indicates that modifications should not be persisted. An invalid or unrecognized dryRun directive will result in an error response and no further processing of the request. Valid values are: - All: all dry run stages will be processed
`fieldValidation`	`string`	fieldValidation instructs the server on how to handle objects in the request (POST/PUT/PATCH) containing unknown or duplicate fields. Valid values are: - Ignore: This will ignore any unknown fields that are silently dropped from the object, and will ignore all but the last duplicate field that the decoder encounters. This is the default behavior prior to v1.23. - Warn: This will send a warning via the standard warning response header for each unknown field that is dropped from the object, and for each duplicate field that is encountered. The request will still succeed if there are no other errors, and will only persist the last of any duplicate fields. This is the default in v1.23+ - Strict: This will fail the request with a BadRequest error if any unknown fields would be dropped from the object, or if any duplicate fields are present. The error returned from the server will contain all unknown and duplicate fields encountered.

Table 17. Body parameters
Parameter	Type	Description
`body`	`CSIStorageCapacity` schema

Table 18. HTTP responses
HTTP code	Reponse body
200 - OK	`CSIStorageCapacity` schema
201 - Created	`CSIStorageCapacity` schema
401 - Unauthorized	Empty

/apis/storage.k8s.io/v1/watch/namespaces/{namespace}/csistoragecapacities/{name}

Table 19. Global path parameters
Parameter	Type	Description
`name`	`string`	name of the CSIStorageCapacity

HTTP method: GET
Description: watch changes to an object of kind CSIStorageCapacity. deprecated: use the 'watch' parameter with a list operation instead, filtered to a single item with the 'fieldSelector' parameter.

Table 20. HTTP responses
HTTP code	Reponse body
200 - OK	`WatchEvent` schema
401 - Unauthorized	Empty