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Webhook

These markers describe how webhook configuration is generated. Use these to keep the description of your webhooks close to the code that implements them.

// +kubebuilder:webhook
admissionReviewVersions
string
failurePolicy
string
groups
string
matchPolicy
string
mutating
bool
name
string
path
string
resources
string
sideEffects
string
verbs
string
versions
string
webhookVersions
string
specifies how a webhook should be served.

It specifies only the details that are intrinsic to the application serving it (e.g. the resources it can handle, or the path it serves on).

admissionReviewVersions
string
is an ordered list of preferred `AdmissionReview` versions the Webhook expects. For generating v1 {Mutating,Validating}WebhookConfiguration, this is mandatory. For generating v1beta1 {Mutating,Validating}WebhookConfiguration, this is optional, and default to v1beta1.
failurePolicy
string
specifies what should happen if the API server cannot reach the webhook.

It may be either “ignore“ (to skip the webhook and continue on) or “fail“ (to reject the object in question).

groups
string
specifies the API groups that this webhook receives requests for.
matchPolicy
string
defines how the "rules" list is used to match incoming requests. Allowed values are "Exact" (match only if it exactly matches the specified rule) or "Equivalent" (match a request if it modifies a resource listed in rules, even via another API group or version).
mutating
bool
marks this as a mutating webhook (it's validating only if false)

Mutating webhooks are allowed to change the object in their response, and are called before all validating webhooks. Mutating webhooks may choose to reject an object, similarly to a validating webhook.

name
string
indicates the name of this webhook configuration. Should be a domain with at least three segments separated by dots
path
string
specifies that path that the API server should connect to this webhook on. Must be prefixed with a '/validate-' or '/mutate-' depending on the type, and followed by $GROUP-$VERSION-$KIND where all values are lower-cased and the periods in the group are substituted for hyphens. For example, a validating webhook path for type batch.tutorial.kubebuilder.io/v1,Kind=CronJob would be /validate-batch-tutorial-kubebuilder-io-v1-cronjob
resources
string
specifies the API resources that this webhook receives requests for.
sideEffects
string
specify whether calling the webhook will have side effects. This has an impact on dry runs and `kubectl diff`: if the sideEffect is "Unknown" (the default) or "Some", then the API server will not call the webhook on a dry-run request and fails instead. If the value is "None", then the webhook has no side effects and the API server will call it on dry-run. If the value is "NoneOnDryRun", then the webhook is responsible for inspecting the "dryRun" property of the AdmissionReview sent in the request, and avoiding side effects if that value is "true."
verbs
string
specifies the Kubernetes API verbs that this webhook receives requests for.

Only modification-like verbs may be specified. May be “create“, “update“, “delete“, “connect“, or “*“ (for all).

versions
string
specifies the API versions that this webhook receives requests for.
webhookVersions
string
specifies the target API versions of the {Mutating,Validating}WebhookConfiguration objects itself to generate. Defaults to v1.