ValidatingWebhookConfiguration describes the configuration of and admission webhook that accept or reject and object without changing it.
ValidatingWebhookConfiguration describes the configuration of and admission webhook that accept or reject and object without changing it.
object
Property | Type | Description |
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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 |
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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 |
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Standard object metadata; More info: https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata. |
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Webhooks is a list of webhooks and the affected resources and operations. |
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ValidatingWebhook describes an admission webhook and the resources and operations it applies to. |
Webhooks is a list of webhooks and the affected resources and operations.
array
ValidatingWebhook describes an admission webhook and the resources and operations it applies to.
object
name
clientConfig
sideEffects
admissionReviewVersions
Property | Type | Description |
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AdmissionReviewVersions is an ordered list of preferred |
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WebhookClientConfig contains the information to make a TLS connection with the webhook |
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FailurePolicy defines how unrecognized errors from the admission endpoint are handled - allowed values are Ignore or Fail. Defaults to Fail. Possible enum values:
- |
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MatchConditions is a list of conditions that must be met for a request to be sent to this webhook. Match conditions filter requests that have already been matched by the rules, namespaceSelector, and objectSelector. An empty list of matchConditions matches all requests. There are a maximum of 64 match conditions allowed. The exact matching logic is (in order): 1. If ANY matchCondition evaluates to FALSE, the webhook is skipped. 2. If ALL matchConditions evaluate to TRUE, the webhook is called. 3. If any matchCondition evaluates to an error (but none are FALSE): - If failurePolicy=Fail, reject the request - If failurePolicy=Ignore, the error is ignored and the webhook is skipped This is a beta feature and managed by the AdmissionWebhookMatchConditions feature gate. |
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MatchCondition represents a condition which must by fulfilled for a request to be sent to a webhook. |
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matchPolicy defines how the "rules" list is used to match incoming requests. Allowed values are "Exact" or "Equivalent". - Exact: match a request only if it exactly matches a specified rule. For example, if deployments can be modified via apps/v1, apps/v1beta1, and extensions/v1beta1, but "rules" only included - Equivalent: match a request if modifies a resource listed in rules, even via another API group or version. For example, if deployments can be modified via apps/v1, apps/v1beta1, and extensions/v1beta1, and "rules" only included Defaults to "Equivalent" Possible enum values:
- |
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The name of the admission webhook. Name should be fully qualified, e.g., imagepolicy.kubernetes.io, where "imagepolicy" is the name of the webhook, and kubernetes.io is the name of the organization. Required. |
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NamespaceSelector decides whether to run the webhook on an object based on whether the namespace for that object matches the selector. If the object itself is a namespace, the matching is performed on object.metadata.labels. If the object is another cluster scoped resource, it never skips the webhook. For example, to run the webhook on any objects whose namespace is not associated with "runlevel" of "0" or "1"; you will set the selector as follows: "namespaceSelector": { "matchExpressions": [ { "key": "runlevel", "operator": "NotIn", "values": [ "0", "1" ] } ] } If instead you want to only run the webhook on any objects whose namespace is associated with the "environment" of "prod" or "staging"; you will set the selector as follows: "namespaceSelector": { "matchExpressions": [ { "key": "environment", "operator": "In", "values": [ "prod", "staging" ] } ] } See https://kubernetes.io/docs/concepts/overview/working-with-objects/labels for more examples of label selectors. Default to the empty LabelSelector, which matches everything. |
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ObjectSelector decides whether to run the webhook based on if the object has matching labels. objectSelector is evaluated against both the oldObject and newObject that would be sent to the webhook, and is considered to match if either object matches the selector. A null object (oldObject in the case of create, or newObject in the case of delete) or an object that cannot have labels (like a DeploymentRollback or a PodProxyOptions object) is not considered to match. Use the object selector only if the webhook is opt-in, because end users may skip the admission webhook by setting the labels. Default to the empty LabelSelector, which matches everything. |
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Rules describes what operations on what resources/subresources the webhook cares about. The webhook cares about an operation if it matches any Rule. However, in order to prevent ValidatingAdmissionWebhooks and MutatingAdmissionWebhooks from putting the cluster in a state which cannot be recovered from without completely disabling the plugin, ValidatingAdmissionWebhooks and MutatingAdmissionWebhooks are never called on admission requests for ValidatingWebhookConfiguration and MutatingWebhookConfiguration objects. |
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RuleWithOperations is a tuple of Operations and Resources. It is recommended to make sure that all the tuple expansions are valid. |
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SideEffects states whether this webhook has side effects. Acceptable values are: None, NoneOnDryRun (webhooks created via v1beta1 may also specify Some or Unknown). Webhooks with side effects MUST implement a reconciliation system, since a request may be rejected by a future step in the admission chain and the side effects therefore need to be undone. Requests with the dryRun attribute will be auto-rejected if they match a webhook with sideEffects == Unknown or Some. Possible enum values:
- |
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TimeoutSeconds specifies the timeout for this webhook. After the timeout passes, the webhook call will be ignored or the API call will fail based on the failure policy. The timeout value must be between 1 and 30 seconds. Default to 10 seconds. |
WebhookClientConfig contains the information to make a TLS connection with the webhook
object
Property | Type | Description |
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ServiceReference holds a reference to Service.legacy.k8s.io |
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The Please note that using The scheme must be "https"; the URL must begin with "https://". A path is optional, and if present may be any string permissible in a URL. You may use the path to pass an arbitrary string to the webhook, for example, a cluster identifier. Attempting to use a user or basic auth e.g. "user:password@" is not allowed. Fragments ("#…") and query parameters ("?…") are not allowed, either. |
ServiceReference holds a reference to Service.legacy.k8s.io
object
namespace
name
Property | Type | Description |
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If specified, the port on the service that hosting webhook. Default to 443 for backward compatibility. |
MatchConditions is a list of conditions that must be met for a request to be sent to this webhook. Match conditions filter requests that have already been matched by the rules, namespaceSelector, and objectSelector. An empty list of matchConditions matches all requests. There are a maximum of 64 match conditions allowed.
The exact matching logic is (in order): 1. If ANY matchCondition evaluates to FALSE, the webhook is skipped. 2. If ALL matchConditions evaluate to TRUE, the webhook is called. 3. If any matchCondition evaluates to an error (but none are FALSE): - If failurePolicy=Fail, reject the request - If failurePolicy=Ignore, the error is ignored and the webhook is skipped
This is a beta feature and managed by the AdmissionWebhookMatchConditions feature gate.
array
MatchCondition represents a condition which must by fulfilled for a request to be sent to a webhook.
object
name
expression
Property | Type | Description |
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Expression represents the expression which will be evaluated by CEL. Must evaluate to bool. CEL expressions have access to the contents of the AdmissionRequest and Authorizer, organized into CEL variables: 'object' - The object from the incoming request. The value is null for DELETE requests. 'oldObject' - The existing object. The value is null for CREATE requests. 'request' - Attributes of the admission request(/pkg/apis/admission/types.go#AdmissionRequest). 'authorizer' - A CEL Authorizer. May be used to perform authorization checks for the principal (user or service account) of the request. See https://pkg.go.dev/k8s.io/apiserver/pkg/cel/library#Authz 'authorizer.requestResource' - A CEL ResourceCheck constructed from the 'authorizer' and configured with the request resource. Documentation on CEL: https://kubernetes.io/docs/reference/using-api/cel/ Required. |
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Name is an identifier for this match condition, used for strategic merging of MatchConditions, as well as providing an identifier for logging purposes. A good name should be descriptive of the associated expression. Name must be a qualified name consisting of alphanumeric characters, '-', '' or '.', and must start and end with an alphanumeric character (e.g. 'MyName', or 'my.name', or '123-abc', regex used for validation is '([A-Za-z0-9][-A-Za-z0-9.]*)?[A-Za-z0-9]') with an optional DNS subdomain prefix and '/' (e.g. 'example.com/MyName') Required. |
Rules describes what operations on what resources/subresources the webhook cares about. The webhook cares about an operation if it matches any Rule. However, in order to prevent ValidatingAdmissionWebhooks and MutatingAdmissionWebhooks from putting the cluster in a state which cannot be recovered from without completely disabling the plugin, ValidatingAdmissionWebhooks and MutatingAdmissionWebhooks are never called on admission requests for ValidatingWebhookConfiguration and MutatingWebhookConfiguration objects.
array
RuleWithOperations is a tuple of Operations and Resources. It is recommended to make sure that all the tuple expansions are valid.
object
Property | Type | Description |
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APIGroups is the API groups the resources belong to. '' is all groups. If '' is present, the length of the slice must be one. Required. |
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APIVersions is the API versions the resources belong to. '' is all versions. If '' is present, the length of the slice must be one. Required. |
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Operations is the operations the admission hook cares about - CREATE, UPDATE, DELETE, CONNECT or * for all of those operations and any future admission operations that are added. If '*' is present, the length of the slice must be one. Required. |
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Resources is a list of resources this rule applies to. For example: 'pods' means pods. 'pods/log' means the log subresource of pods. '' means all resources, but not subresources. 'pods/' means all subresources of pods. '/scale' means all scale subresources. '/*' means all resources and their subresources. If wildcard is present, the validation rule will ensure resources do not overlap with each other. Depending on the enclosing object, subresources might not be allowed. Required. |
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scope specifies the scope of this rule. Valid values are "Cluster", "Namespaced", and "" "Cluster" means that only cluster-scoped resources will match this rule. Namespace API objects are cluster-scoped. "Namespaced" means that only namespaced resources will match this rule. "" means that there are no scope restrictions. Subresources match the scope of their parent resource. Default is "*". |
The following API endpoints are available:
/apis/admissionregistration.k8s.io/v1/validatingwebhookconfigurations
DELETE
: delete collection of ValidatingWebhookConfiguration
GET
: list or watch objects of kind ValidatingWebhookConfiguration
POST
: create a ValidatingWebhookConfiguration
/apis/admissionregistration.k8s.io/v1/watch/validatingwebhookconfigurations
GET
: watch individual changes to a list of ValidatingWebhookConfiguration. deprecated: use the 'watch' parameter with a list operation instead.
/apis/admissionregistration.k8s.io/v1/validatingwebhookconfigurations/{name}
DELETE
: delete a ValidatingWebhookConfiguration
GET
: read the specified ValidatingWebhookConfiguration
PATCH
: partially update the specified ValidatingWebhookConfiguration
PUT
: replace the specified ValidatingWebhookConfiguration
/apis/admissionregistration.k8s.io/v1/watch/validatingwebhookconfigurations/{name}
GET
: watch changes to an object of kind ValidatingWebhookConfiguration. deprecated: use the 'watch' parameter with a list operation instead, filtered to a single item with the 'fieldSelector' parameter.
DELETE
delete collection of ValidatingWebhookConfiguration
Parameter | Type | Description |
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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 |
HTTP code | Reponse body |
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200 - OK |
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401 - Unauthorized |
Empty |
GET
list or watch objects of kind ValidatingWebhookConfiguration
HTTP code | Reponse body |
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200 - OK |
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401 - Unauthorized |
Empty |
POST
create a ValidatingWebhookConfiguration
Parameter | Type | Description |
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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 |
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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. |
Parameter | Type | Description |
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HTTP code | Reponse body |
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200 - OK |
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201 - Created |
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202 - Accepted |
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401 - Unauthorized |
Empty |
GET
watch individual changes to a list of ValidatingWebhookConfiguration. deprecated: use the 'watch' parameter with a list operation instead.
HTTP code | Reponse body |
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200 - OK |
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401 - Unauthorized |
Empty |
Parameter | Type | Description |
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name of the ValidatingWebhookConfiguration |
DELETE
delete a ValidatingWebhookConfiguration
Parameter | Type | Description |
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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 |
HTTP code | Reponse body |
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200 - OK |
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202 - Accepted |
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401 - Unauthorized |
Empty |
GET
read the specified ValidatingWebhookConfiguration
HTTP code | Reponse body |
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200 - OK |
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401 - Unauthorized |
Empty |
PATCH
partially update the specified ValidatingWebhookConfiguration
Parameter | Type | Description |
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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 |
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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. |
HTTP code | Reponse body |
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200 - OK |
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201 - Created |
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401 - Unauthorized |
Empty |
PUT
replace the specified ValidatingWebhookConfiguration
Parameter | Type | Description |
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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 |
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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. |
Parameter | Type | Description |
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HTTP code | Reponse body |
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200 - OK |
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201 - Created |
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401 - Unauthorized |
Empty |
Parameter | Type | Description |
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name of the ValidatingWebhookConfiguration |
GET
watch changes to an object of kind ValidatingWebhookConfiguration. deprecated: use the 'watch' parameter with a list operation instead, filtered to a single item with the 'fieldSelector' parameter.
HTTP code | Reponse body |
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200 - OK |
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401 - Unauthorized |
Empty |