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Interface MutatingWebhookV1Beta1

MutatingWebhook describes an admission webhook and the resources and operations it applies to.

schema

io.k8s.api.admissionregistration.v1beta1.MutatingWebhook

Hierarchy

  • MutatingWebhookV1Beta1

Index

Properties

Optional Readonly admissionReviewVersions

admissionReviewVersions: string[]

AdmissionReviewVersions is an ordered list of preferred AdmissionReview versions the Webhook expects. API server will try to use first version in the list which it supports. If none of the versions specified in this list supported by API server, validation will fail for this object. If a persisted webhook configuration specifies allowed versions and does not include any versions known to the API Server, calls to the webhook will fail and be subject to the failure policy. Default to ['v1beta1'].

default

v1beta1']`.

schema

io.k8s.api.admissionregistration.v1beta1.MutatingWebhook#admissionReviewVersions

Readonly clientConfig

ClientConfig defines how to communicate with the hook. Required

schema

io.k8s.api.admissionregistration.v1beta1.MutatingWebhook#clientConfig

Optional Readonly failurePolicy

failurePolicy: string

FailurePolicy defines how unrecognized errors from the admission endpoint are handled - allowed values are Ignore or Fail. Defaults to Ignore.

default

Ignore.

schema

io.k8s.api.admissionregistration.v1beta1.MutatingWebhook#failurePolicy

Optional Readonly matchPolicy

matchPolicy: string

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 apiGroups:["apps"], apiVersions:["v1"], resources: ["deployments"], a request to apps/v1beta1 or extensions/v1beta1 would not be sent to the webhook.

  • 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 apiGroups:["apps"], apiVersions:["v1"], resources: ["deployments"], a request to apps/v1beta1 or extensions/v1beta1 would be converted to apps/v1 and sent to the webhook.

Defaults to "Exact"

default

Exact"

schema

io.k8s.api.admissionregistration.v1beta1.MutatingWebhook#matchPolicy

Readonly name

name: string

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.

schema

io.k8s.api.admissionregistration.v1beta1.MutatingWebhook#name

Optional Readonly namespaceSelector

namespaceSelector: LabelSelector

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.

default

the empty LabelSelector, which matches everything.

schema

io.k8s.api.admissionregistration.v1beta1.MutatingWebhook#namespaceSelector

Optional Readonly objectSelector

objectSelector: LabelSelector

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.

default

the empty LabelSelector, which matches everything.

schema

io.k8s.api.admissionregistration.v1beta1.MutatingWebhook#objectSelector

Optional Readonly reinvocationPolicy

reinvocationPolicy: string

reinvocationPolicy indicates whether this webhook should be called multiple times as part of a single admission evaluation. Allowed values are "Never" and "IfNeeded".

Never: the webhook will not be called more than once in a single admission evaluation.

IfNeeded: the webhook will be called at least one additional time as part of the admission evaluation if the object being admitted is modified by other admission plugins after the initial webhook call. Webhooks that specify this option must be idempotent, able to process objects they previously admitted. Note: * the number of additional invocations is not guaranteed to be exactly one. * if additional invocations result in further modifications to the object, webhooks are not guaranteed to be invoked again. * webhooks that use this option may be reordered to minimize the number of additional invocations. * to validate an object after all mutations are guaranteed complete, use a validating admission webhook instead.

Defaults to "Never".

default

Never".

schema

io.k8s.api.admissionregistration.v1beta1.MutatingWebhook#reinvocationPolicy

Optional Readonly rules

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.

schema

io.k8s.api.admissionregistration.v1beta1.MutatingWebhook#rules

Optional Readonly sideEffects

sideEffects: string

SideEffects states whether this webhook has side effects. Acceptable values are: Unknown, None, Some, NoneOnDryRun 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. Defaults to Unknown.

default

Unknown.

schema

io.k8s.api.admissionregistration.v1beta1.MutatingWebhook#sideEffects

Optional Readonly timeoutSeconds

timeoutSeconds: number

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 30 seconds.

default

30 seconds.

schema

io.k8s.api.admissionregistration.v1beta1.MutatingWebhook#timeoutSeconds

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