types.go

// WebhookClientConfig contains the information to make a TLS
// connection with the webhook
type WebhookClientConfig struct {
	// `url` gives the location of the webhook, in standard URL form
	// (`scheme://host:port/path`). Exactly one of `url` or `service`
	// must be specified.
	//
	// The `host` should not refer to a service running in the cluster; use
	// the `service` field instead. The host might be resolved via external
	// DNS in some apiservers (e.g., `kube-apiserver` cannot resolve
	// in-cluster DNS as that would be a layering violation). `host` may
	// also be an IP address.
	//
	// Please note that using `localhost` or `127.0.0.1` as a `host` is
	// risky unless you take great care to run this webhook on all hosts
	// which run an apiserver which might need to make calls to this
	// webhook. Such installs are likely to be non-portable, i.e., not easy
	// to turn up in a new cluster.
	//
	// 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.
	//
	// +optional
	URL *string `json:"url,omitempty" protobuf:"bytes,3,opt,name=url"`

	// `service` is a reference to the service for this webhook. Either
	// `service` or `url` must be specified.
	//
	// If the webhook is running within the cluster, then you should use `service`.
	//
	// +optional
	Service *ServiceReference `json:"service,omitempty" protobuf:"bytes,1,opt,name=service"`

	// `caBundle` is a PEM encoded CA bundle which will be used to validate the webhook's server certificate.
	// If unspecified, system trust roots on the apiserver are used.
	// +optional
	CABundle []byte `json:"caBundle,omitempty" protobuf:"bytes,2,opt,name=caBundle"`
}

// RuleWithOperations is a tuple of Operations and Resources. It is recommended to make
// sure that all the tuple expansions are valid.
type RuleWithOperations struct {
	// 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.
	// +listType=atomic
	Operations []OperationType `json:"operations,omitempty" protobuf:"bytes,1,rep,name=operations,casttype=OperationType"`
	// Rule is embedded, it describes other criteria of the rule, like
	// APIGroups, APIVersions, Resources, etc.
	Rule `json:",inline" protobuf:"bytes,2,opt,name=rule"`
}

// OperationType specifies an operation for a request.
// +enum
type OperationType string

// The constants should be kept in sync with those defined in k8s.io/kubernetes/pkg/admission/interface.go.
const (
	OperationAll OperationType = "*"
	Create       OperationType = "CREATE"
	Update       OperationType = "UPDATE"
	Delete       OperationType = "DELETE"
	Connect      OperationType = "CONNECT"
)

// FailurePolicyType specifies a failure policy that defines how unrecognized errors from the admission endpoint are handled.
// +enum
type FailurePolicyType string

const (
	// Ignore means that an error calling the webhook is ignored.
	Ignore FailurePolicyType = "Ignore"
	// Fail means that an error calling the webhook causes the admission to fail.
	Fail FailurePolicyType = "Fail"
)