Description

FlowSchema defines the schema of a group of flows. Note that a flow is made up of a set of inbound API requests with similar attributes and is identified by a pair of strings: the name of the FlowSchema and a "flow distinguisher".

Type

object

Specification

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

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

metadata

ObjectMeta meta/v1

metadata is the standard object’s metadata. More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata

spec

object

FlowSchemaSpec describes how the FlowSchema’s specification looks like.

status

object

FlowSchemaStatus represents the current state of a FlowSchema.

.spec
Description

FlowSchemaSpec describes how the FlowSchema’s specification looks like.

Type

object

Required
  • priorityLevelConfiguration

Property Type Description

distinguisherMethod

object

FlowDistinguisherMethod specifies the method of a flow distinguisher.

matchingPrecedence

integer

matchingPrecedence is used to choose among the FlowSchemas that match a given request. The chosen FlowSchema is among those with the numerically lowest (which we take to be logically highest) MatchingPrecedence. Each MatchingPrecedence value must be ranged in [1,10000]. Note that if the precedence is not specified, it will be set to 1000 as default.

priorityLevelConfiguration

object

PriorityLevelConfigurationReference contains information that points to the "request-priority" being used.

rules

array

rules describes which requests will match this flow schema. This FlowSchema matches a request if and only if at least one member of rules matches the request. if it is an empty slice, there will be no requests matching the FlowSchema.

rules[]

object

PolicyRulesWithSubjects prescribes a test that applies to a request to an apiserver. The test considers the subject making the request, the verb being requested, and the resource to be acted upon. This PolicyRulesWithSubjects matches a request if and only if both (a) at least one member of subjects matches the request and (b) at least one member of resourceRules or nonResourceRules matches the request.

.spec.distinguisherMethod
Description

FlowDistinguisherMethod specifies the method of a flow distinguisher.

Type

object

Required
  • type

Property Type Description

type

string

type is the type of flow distinguisher method The supported types are "ByUser" and "ByNamespace". Required.

.spec.priorityLevelConfiguration
Description

PriorityLevelConfigurationReference contains information that points to the "request-priority" being used.

Type

object

Required
  • name

Property Type Description

name

string

name is the name of the priority level configuration being referenced Required.

.spec.rules
Description

rules describes which requests will match this flow schema. This FlowSchema matches a request if and only if at least one member of rules matches the request. if it is an empty slice, there will be no requests matching the FlowSchema.

Type

array

.spec.rules[]
Description

PolicyRulesWithSubjects prescribes a test that applies to a request to an apiserver. The test considers the subject making the request, the verb being requested, and the resource to be acted upon. This PolicyRulesWithSubjects matches a request if and only if both (a) at least one member of subjects matches the request and (b) at least one member of resourceRules or nonResourceRules matches the request.

Type

object

Required
  • subjects

Property Type Description

nonResourceRules

array

nonResourceRules is a list of NonResourcePolicyRules that identify matching requests according to their verb and the target non-resource URL.

nonResourceRules[]

object

NonResourcePolicyRule is a predicate that matches non-resource requests according to their verb and the target non-resource URL. A NonResourcePolicyRule matches a request if and only if both (a) at least one member of verbs matches the request and (b) at least one member of nonResourceURLs matches the request.

resourceRules

array

resourceRules is a slice of ResourcePolicyRules that identify matching requests according to their verb and the target resource. At least one of resourceRules and nonResourceRules has to be non-empty.

resourceRules[]

object

ResourcePolicyRule is a predicate that matches some resource requests, testing the request’s verb and the target resource. A ResourcePolicyRule matches a resource request if and only if: (a) at least one member of verbs matches the request, (b) at least one member of apiGroups matches the request, (c) at least one member of resources matches the request, and (d) least one member of namespaces matches the request.

subjects

array

subjects is the list of normal user, serviceaccount, or group that this rule cares about. There must be at least one member in this slice. A slice that includes both the system:authenticated and system:unauthenticated user groups matches every request. Required.

subjects[]

object

Subject matches the originator of a request, as identified by the request authentication system. There are three ways of matching an originator; by user, group, or service account.

.spec.rules[].nonResourceRules
Description

nonResourceRules is a list of NonResourcePolicyRules that identify matching requests according to their verb and the target non-resource URL.

Type

array

.spec.rules[].nonResourceRules[]
Description

NonResourcePolicyRule is a predicate that matches non-resource requests according to their verb and the target non-resource URL. A NonResourcePolicyRule matches a request if and only if both (a) at least one member of verbs matches the request and (b) at least one member of nonResourceURLs matches the request.

Type

object

Required
  • verbs

  • nonResourceURLs

Property Type Description

nonResourceURLs

array (string)

nonResourceURLs is a set of url prefixes that a user should have access to and may not be empty. For example: - "/healthz" is legal - "/hea*" is illegal - "/hea" is legal but matches nothing - "/hea/" also matches nothing - "/healthz/" matches all per-component health checks. "*" matches all non-resource urls. if it is present, it must be the only entry. Required.

verbs

array (string)

verbs is a list of matching verbs and may not be empty. "*" matches all verbs. If it is present, it must be the only entry. Required.

.spec.rules[].resourceRules
Description

resourceRules is a slice of ResourcePolicyRules that identify matching requests according to their verb and the target resource. At least one of resourceRules and nonResourceRules has to be non-empty.

Type

array

.spec.rules[].resourceRules[]
Description

ResourcePolicyRule is a predicate that matches some resource requests, testing the request’s verb and the target resource. A ResourcePolicyRule matches a resource request if and only if: (a) at least one member of verbs matches the request, (b) at least one member of apiGroups matches the request, (c) at least one member of resources matches the request, and (d) least one member of namespaces matches the request.

Type

object

Required
  • verbs

  • apiGroups

  • resources

Property Type Description

apiGroups

array (string)

apiGroups is a list of matching API groups and may not be empty. "*" matches all API groups and, if present, must be the only entry. Required.

clusterScope

boolean

clusterScope indicates whether to match requests that do not specify a namespace (which happens either because the resource is not namespaced or the request targets all namespaces). If this field is omitted or false then the namespaces field must contain a non-empty list.

namespaces

array (string)

namespaces is a list of target namespaces that restricts matches. A request that specifies a target namespace matches only if either (a) this list contains that target namespace or (b) this list contains "". Note that "" matches any specified namespace but does not match a request that does not specify a namespace (see the clusterScope field for that). This list may be empty, but only if clusterScope is true.

resources

array (string)

resources is a list of matching resources (i.e., lowercase and plural) with, if desired, subresource. For example, [ "services", "nodes/status" ]. This list may not be empty. "*" matches all resources and, if present, must be the only entry. Required.

verbs

array (string)

verbs is a list of matching verbs and may not be empty. "*" matches all verbs and, if present, must be the only entry. Required.

.spec.rules[].subjects
Description

subjects is the list of normal user, serviceaccount, or group that this rule cares about. There must be at least one member in this slice. A slice that includes both the system:authenticated and system:unauthenticated user groups matches every request. Required.

Type

array

.spec.rules[].subjects[]
Description

Subject matches the originator of a request, as identified by the request authentication system. There are three ways of matching an originator; by user, group, or service account.

Type

object

Required
  • kind

Property Type Description

group

object

GroupSubject holds detailed information for group-kind subject.

kind

string

Required

serviceAccount

object

ServiceAccountSubject holds detailed information for service-account-kind subject.

user

object

UserSubject holds detailed information for user-kind subject.

.spec.rules[].subjects[].group
Description

GroupSubject holds detailed information for group-kind subject.

Type

object

Required
  • name

Property Type Description

name

string

name is the user group that matches, or "*" to match all user groups. See https://github.com/kubernetes/apiserver/blob/master/pkg/authentication/user/user.go for some well-known group names. Required.

.spec.rules[].subjects[].serviceAccount
Description

ServiceAccountSubject holds detailed information for service-account-kind subject.

Type

object

Required
  • namespace

  • name

Property Type Description

name

string

name is the name of matching ServiceAccount objects, or "*" to match regardless of name. Required.

namespace

string

namespace is the namespace of matching ServiceAccount objects. Required.

.spec.rules[].subjects[].user
Description

UserSubject holds detailed information for user-kind subject.

Type

object

Required
  • name

Property Type Description

name

string

name is the username that matches, or "*" to match all usernames. Required.

.status
Description

FlowSchemaStatus represents the current state of a FlowSchema.

Type

object

Property Type Description

conditions

array

conditions is a list of the current states of FlowSchema.

conditions[]

object

FlowSchemaCondition describes conditions for a FlowSchema.

.status.conditions
Description

conditions is a list of the current states of FlowSchema.

Type

array

.status.conditions[]
Description

FlowSchemaCondition describes conditions for a FlowSchema.

Type

object

Property Type Description

lastTransitionTime

Time meta/v1

lastTransitionTime is the last time the condition transitioned from one status to another.

message

string

message is a human-readable message indicating details about last transition.

reason

string

reason is a unique, one-word, CamelCase reason for the condition’s last transition.

status

string

status is the status of the condition. Can be True, False, Unknown. Required.

type

string

type is the type of the condition. Required.

API endpoints

The following API endpoints are available:

  • /apis/flowcontrol.apiserver.k8s.io/v1beta1/flowschemas

    • DELETE: delete collection of FlowSchema

    • GET: list or watch objects of kind FlowSchema

    • POST: create a FlowSchema

  • /apis/flowcontrol.apiserver.k8s.io/v1beta1/flowschemas/{name}

    • DELETE: delete a FlowSchema

    • GET: read the specified FlowSchema

    • PATCH: partially update the specified FlowSchema

    • PUT: replace the specified FlowSchema

  • /apis/flowcontrol.apiserver.k8s.io/v1beta1/flowschemas/{name}/status

    • GET: read status of the specified FlowSchema

    • PATCH: partially update status of the specified FlowSchema

    • PUT: replace status of the specified FlowSchema

/apis/flowcontrol.apiserver.k8s.io/v1beta1/flowschemas

Table 1. Global query parameters
Parameter Type Description

pretty

string

If 'true', then the output is pretty printed.

HTTP method

DELETE

Description

delete collection of FlowSchema

Table 2. Query parameters
Parameter Type Description

continue

string

The continue option should be set when retrieving more results from the server. Since this value is server defined, clients may only use the continue value from a previous query result with identical query parameters (except for the value of continue) and the server may reject a continue value it does not recognize. If the specified continue value is no longer valid whether due to expiration (generally five to fifteen minutes) or a configuration change on the server, the server will respond with a 410 ResourceExpired error together with a continue token. If the client needs a consistent list, it must restart their list without the continue field. Otherwise, the client may send another list request with the token received with the 410 error, the server will respond with a list starting from the next key, but from the latest snapshot, which is inconsistent from the previous list results - objects that are created, modified, or deleted after the first list request will be included in the response, as long as their keys are after the "next key".

This field is not supported when watch is true. Clients may start a watch from the last resourceVersion value returned by the server and not miss any modifications.

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

fieldSelector

string

A selector to restrict the list of returned objects by their fields. Defaults to everything.

gracePeriodSeconds

integer

The duration in seconds before the object should be deleted. Value must be non-negative integer. The value zero indicates delete immediately. If this value is nil, the default grace period for the specified type will be used. Defaults to a per object value if not specified. zero means delete immediately.

labelSelector

string

A selector to restrict the list of returned objects by their labels. Defaults to everything.

limit

integer

limit is a maximum number of responses to return for a list call. If more items exist, the server will set the `continue` field on the list metadata to a value that can be used with the same initial query to retrieve the next set of results. Setting a limit may return fewer than the requested amount of items (up to zero items) in the event all requested objects are filtered out and clients should only use the presence of the continue field to determine whether more results are available. Servers may choose not to support the limit argument and will return all of the available results. If limit is specified and the continue field is empty, clients may assume that no more results are available. This field is not supported if watch is true.

The server guarantees that the objects returned when using continue will be identical to issuing a single list call without a limit - that is, no objects created, modified, or deleted after the first request is issued will be included in any subsequent continued requests. This is sometimes referred to as a consistent snapshot, and ensures that a client that is using limit to receive smaller chunks of a very large result can ensure they see all possible objects. If objects are updated during a chunked list the version of the object that was present at the time the first list result was calculated is returned.

orphanDependents

boolean

Deprecated: please use the PropagationPolicy, this field will be deprecated in 1.7. Should the dependent objects be orphaned. If true/false, the "orphan" finalizer will be added to/removed from the object's finalizers list. Either this field or PropagationPolicy may be set, but not both.

propagationPolicy

string

Whether and how garbage collection will be performed. Either this field or OrphanDependents may be set, but not both. The default policy is decided by the existing finalizer set in the metadata.finalizers and the resource-specific default policy. Acceptable values are: 'Orphan' - orphan the dependents; 'Background' - allow the garbage collector to delete the dependents in the background; 'Foreground' - a cascading policy that deletes all dependents in the foreground.

resourceVersion

string

resourceVersion sets a constraint on what resource versions a request may be served from. See https://kubernetes.io/docs/reference/using-api/api-concepts/#resource-versions for details.

Defaults to unset

resourceVersionMatch

string

resourceVersionMatch determines how resourceVersion is applied to list calls. It is highly recommended that resourceVersionMatch be set for list calls where resourceVersion is set See https://kubernetes.io/docs/reference/using-api/api-concepts/#resource-versions for details.

Defaults to unset

timeoutSeconds

integer

Timeout for the list/watch call. This limits the duration of the call, regardless of any activity or inactivity.

Table 3. Body parameters
Parameter Type Description

body

DeleteOptions meta/v1

Table 4. HTTP responses
HTTP code Reponse body

200 - OK

Status meta/v1

HTTP method

GET

Description

list or watch objects of kind FlowSchema

Table 5. Query parameters
Parameter Type Description

allowWatchBookmarks

boolean

allowWatchBookmarks requests watch events with type "BOOKMARK". Servers that do not implement bookmarks may ignore this flag and bookmarks are sent at the server's discretion. Clients should not assume bookmarks are returned at any specific interval, nor may they assume the server will send any BOOKMARK event during a session. If this is not a watch, this field is ignored. If the feature gate WatchBookmarks is not enabled in apiserver, this field is ignored.

continue

string

The continue option should be set when retrieving more results from the server. Since this value is server defined, clients may only use the continue value from a previous query result with identical query parameters (except for the value of continue) and the server may reject a continue value it does not recognize. If the specified continue value is no longer valid whether due to expiration (generally five to fifteen minutes) or a configuration change on the server, the server will respond with a 410 ResourceExpired error together with a continue token. If the client needs a consistent list, it must restart their list without the continue field. Otherwise, the client may send another list request with the token received with the 410 error, the server will respond with a list starting from the next key, but from the latest snapshot, which is inconsistent from the previous list results - objects that are created, modified, or deleted after the first list request will be included in the response, as long as their keys are after the "next key".

This field is not supported when watch is true. Clients may start a watch from the last resourceVersion value returned by the server and not miss any modifications.

fieldSelector

string

A selector to restrict the list of returned objects by their fields. Defaults to everything.

labelSelector

string

A selector to restrict the list of returned objects by their labels. Defaults to everything.

limit

integer

limit is a maximum number of responses to return for a list call. If more items exist, the server will set the `continue` field on the list metadata to a value that can be used with the same initial query to retrieve the next set of results. Setting a limit may return fewer than the requested amount of items (up to zero items) in the event all requested objects are filtered out and clients should only use the presence of the continue field to determine whether more results are available. Servers may choose not to support the limit argument and will return all of the available results. If limit is specified and the continue field is empty, clients may assume that no more results are available. This field is not supported if watch is true.

The server guarantees that the objects returned when using continue will be identical to issuing a single list call without a limit - that is, no objects created, modified, or deleted after the first request is issued will be included in any subsequent continued requests. This is sometimes referred to as a consistent snapshot, and ensures that a client that is using limit to receive smaller chunks of a very large result can ensure they see all possible objects. If objects are updated during a chunked list the version of the object that was present at the time the first list result was calculated is returned.

resourceVersion

string

resourceVersion sets a constraint on what resource versions a request may be served from. See https://kubernetes.io/docs/reference/using-api/api-concepts/#resource-versions for details.

Defaults to unset

resourceVersionMatch

string

resourceVersionMatch determines how resourceVersion is applied to list calls. It is highly recommended that resourceVersionMatch be set for list calls where resourceVersion is set See https://kubernetes.io/docs/reference/using-api/api-concepts/#resource-versions for details.

Defaults to unset

timeoutSeconds

integer

Timeout for the list/watch call. This limits the duration of the call, regardless of any activity or inactivity.

watch

boolean

Watch for changes to the described resources and return them as a stream of add, update, and remove notifications. Specify resourceVersion.

Table 6. HTTP responses
HTTP code Reponse body

200 - OK

FlowSchemaList flowcontrol.apiserver.k8s.io/v1beta1

HTTP method

POST

Description

create a FlowSchema

Table 7. 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

fieldManager

string

fieldManager is a name associated with the actor or entity that is making these changes. The value must be less than or 128 characters long, and only contain printable characters, as defined by https://golang.org/pkg/unicode/#IsPrint.

Table 8. Body parameters
Parameter Type Description

body

FlowSchema flowcontrol.apiserver.k8s.io/v1beta1

Table 9. HTTP responses
HTTP code Reponse body

200 - OK

FlowSchema flowcontrol.apiserver.k8s.io/v1beta1

/apis/flowcontrol.apiserver.k8s.io/v1beta1/flowschemas/{name}

Table 10. Global path parameters
Parameter Type Description

name

string

name of the FlowSchema

Table 11. Global query parameters
Parameter Type Description

pretty

string

If 'true', then the output is pretty printed.

HTTP method

DELETE

Description

delete a FlowSchema

Table 12. 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

gracePeriodSeconds

integer

The duration in seconds before the object should be deleted. Value must be non-negative integer. The value zero indicates delete immediately. If this value is nil, the default grace period for the specified type will be used. Defaults to a per object value if not specified. zero means delete immediately.

orphanDependents

boolean

Deprecated: please use the PropagationPolicy, this field will be deprecated in 1.7. Should the dependent objects be orphaned. If true/false, the "orphan" finalizer will be added to/removed from the object's finalizers list. Either this field or PropagationPolicy may be set, but not both.

propagationPolicy

string

Whether and how garbage collection will be performed. Either this field or OrphanDependents may be set, but not both. The default policy is decided by the existing finalizer set in the metadata.finalizers and the resource-specific default policy. Acceptable values are: 'Orphan' - orphan the dependents; 'Background' - allow the garbage collector to delete the dependents in the background; 'Foreground' - a cascading policy that deletes all dependents in the foreground.

Table 13. Body parameters
Parameter Type Description

body

DeleteOptions meta/v1

Table 14. HTTP responses
HTTP code Reponse body

200 - OK

Status meta/v1

HTTP method

GET

Description

read the specified FlowSchema

Table 15. HTTP responses
HTTP code Reponse body

200 - OK

FlowSchema flowcontrol.apiserver.k8s.io/v1beta1

HTTP method

PATCH

Description

partially update the specified FlowSchema

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

fieldManager

string

fieldManager is a name associated with the actor or entity that is making these changes. The value must be less than or 128 characters long, and only contain printable characters, as defined by https://golang.org/pkg/unicode/#IsPrint. This field is required for apply requests (application/apply-patch) but optional for non-apply patch types (JsonPatch, MergePatch, StrategicMergePatch).

force

boolean

Force is going to "force" Apply requests. It means user will re-acquire conflicting fields owned by other people. Force flag must be unset for non-apply patch requests.

Table 17. Body parameters
Parameter Type Description

body

Patch meta/v1

Table 18. HTTP responses
HTTP code Reponse body

200 - OK

FlowSchema flowcontrol.apiserver.k8s.io/v1beta1

HTTP method

PUT

Description

replace the specified FlowSchema

Table 19. 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

fieldManager

string

fieldManager is a name associated with the actor or entity that is making these changes. The value must be less than or 128 characters long, and only contain printable characters, as defined by https://golang.org/pkg/unicode/#IsPrint.

Table 20. Body parameters
Parameter Type Description

body

FlowSchema flowcontrol.apiserver.k8s.io/v1beta1

Table 21. HTTP responses
HTTP code Reponse body

200 - OK

FlowSchema flowcontrol.apiserver.k8s.io/v1beta1

/apis/flowcontrol.apiserver.k8s.io/v1beta1/flowschemas/{name}/status

Table 22. Global path parameters
Parameter Type Description

name

string

name of the FlowSchema

Table 23. Global query parameters
Parameter Type Description

pretty

string

If 'true', then the output is pretty printed.

HTTP method

GET

Description

read status of the specified FlowSchema

Table 24. HTTP responses
HTTP code Reponse body

200 - OK

FlowSchema flowcontrol.apiserver.k8s.io/v1beta1

HTTP method

PATCH

Description

partially update status of the specified FlowSchema

Table 25. 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

fieldManager

string

fieldManager is a name associated with the actor or entity that is making these changes. The value must be less than or 128 characters long, and only contain printable characters, as defined by https://golang.org/pkg/unicode/#IsPrint. This field is required for apply requests (application/apply-patch) but optional for non-apply patch types (JsonPatch, MergePatch, StrategicMergePatch).

force

boolean

Force is going to "force" Apply requests. It means user will re-acquire conflicting fields owned by other people. Force flag must be unset for non-apply patch requests.

Table 26. Body parameters
Parameter Type Description

body

Patch meta/v1

Table 27. HTTP responses
HTTP code Reponse body

200 - OK

FlowSchema flowcontrol.apiserver.k8s.io/v1beta1

HTTP method

PUT

Description

replace status of the specified FlowSchema

Table 28. 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

fieldManager

string

fieldManager is a name associated with the actor or entity that is making these changes. The value must be less than or 128 characters long, and only contain printable characters, as defined by https://golang.org/pkg/unicode/#IsPrint.

Table 29. Body parameters
Parameter Type Description

body

FlowSchema flowcontrol.apiserver.k8s.io/v1beta1

Table 30. HTTP responses
HTTP code Reponse body

200 - OK

FlowSchema flowcontrol.apiserver.k8s.io/v1beta1