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types.go
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types.go
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// Copyright 2015 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package common
import (
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/unversioned"
)
// ObjectMeta is metadata about an instance of a resource.
type ObjectMeta struct {
// Name is unique within a namespace. Name is primarily intended for creation
// idempotence and configuration definition.
Name string `json:"name,omitempty"`
// Namespace defines the space within which name must be unique. An empty namespace is
// equivalent to the "default" namespace, but "default" is the canonical representation.
// Not all objects are required to be scoped to a namespace - the value of this field for
// those objects will be empty.
Namespace string `json:"namespace,omitempty"`
// Labels are key value pairs that may be used to scope and select individual resources.
// Label keys are of the form:
// label-key ::= prefixed-name | name
// prefixed-name ::= prefix '/' name
// prefix ::= DNS_SUBDOMAIN
// name ::= DNS_LABEL
// The prefix is optional. If the prefix is not specified, the key is assumed to be private
// to the user. Other system components that wish to use labels must specify a prefix.
Labels map[string]string `json:"labels,omitempty"`
// Annotations are unstructured key value data stored with a resource that may be set by
// external tooling. They are not queryable and should be preserved when modifying
// objects. Annotation keys have the same formatting restrictions as Label keys. See the
// comments on Labels for details.
Annotations map[string]string `json:"annotations,omitempty"`
// CreationTimestamp is a timestamp representing the server time when this object was
// created. It is not guaranteed to be set in happens-before order across separate operations.
// Clients may not set this value. It is represented in RFC3339 form and is in UTC.
CreationTimestamp unversioned.Time `json:"creationTimestamp,omitempty"`
}
// TypeMeta describes an individual object in an API response or request
// with strings representing the type of the object.
type TypeMeta struct {
// Kind is a string value representing the REST resource this object represents.
// Servers may infer this from the endpoint the client submits requests to.
// In smalllettercase.
// More info: http://releases.k8s.io/HEAD/docs/devel/api-conventions.md#types-kinds
Kind ResourceKind `json:"kind,omitempty"`
}
// Returns internal endpoint name for the given service properties, e.g.,
// NewObjectMeta creates a new instance of ObjectMeta struct based on K8s object meta.
func NewObjectMeta(k8SObjectMeta api.ObjectMeta) ObjectMeta {
return ObjectMeta{
Name: k8SObjectMeta.Name,
Namespace: k8SObjectMeta.Namespace,
Labels: k8SObjectMeta.Labels,
CreationTimestamp: k8SObjectMeta.CreationTimestamp,
}
}
// NewTypeMeta creates new type mete for the resource kind.
func NewTypeMeta(kind ResourceKind) TypeMeta {
return TypeMeta{
Kind: kind,
}
}
// ResourceKind is an unique name for each resource. It can used for API discovery and generic
// code that does things based on the kind. For example, there may be a generic "deleter"
// that based on resource kind, name and namespace deletes it.
type ResourceKind string
// List of all resource kinds supported by the UI.
const (
ResourceKindReplicaSet = "replicaset"
ResourceKindService = "service"
ResourceKindDeployment = "deployment"
ResourceKindPod = "pod"
ResourceKindEvent = "event"
ResourceKindReplicationController = "replicationcontroller"
ResourceKindDaemonSet = "daemonset"
ResourceKindJob = "job"
ResourceKindPetSet = "petset"
ResourceKindNode = "node"
)
// ClientType represents type of client that is used to perform generic operations on resources.
// Different resources belong to different client, i.e. Deployments belongs to extension client
// and PetSets to apps client.
type ClientType string
// List of client types supported by the UI.
const (
ClientTypeDefault = "restclient"
ClientTypeExtensionClient = "extensionclient"
ClientTypeAppsClient = "appsclient"
ClientTypeBatchClient = "batchclient"
)
// Mapping from resource kind to K8s apiserver API path. This is mostly pluralization, because
// K8s apiserver uses plural paths and this project singular.
// Must be kept in sync with the list of supported kinds.
var kindToAPIMapping = map[string]struct {
// K8s resource name
Resource string
// Client type used by given resource, i.e. deployments are using extension client and pet
// sets apps client.
ClientType ClientType
}{
ResourceKindService: {"services", ClientTypeDefault},
ResourceKindPod: {"pods", ClientTypeDefault},
ResourceKindEvent: {"events", ClientTypeDefault},
ResourceKindReplicationController: {"replicationcontrollers", ClientTypeDefault},
ResourceKindDeployment: {"deployments", ClientTypeExtensionClient},
ResourceKindReplicaSet: {"replicasets", ClientTypeExtensionClient},
ResourceKindDaemonSet: {"daemonsets", ClientTypeExtensionClient},
ResourceKindPetSet: {"petsets", ClientTypeAppsClient},
ResourceKindJob: {"jobs", ClientTypeBatchClient},
ResourceKindNode: {"nodes", ClientTypeDefault},
}
// IsSelectorMatching returns true when an object with the given
// selector targets the same Resources (or subset) that
// the tested object with the given selector.
func IsSelectorMatching(labelSelector map[string]string,
testedObjectLabels map[string]string) bool {
// If service has no selectors, then assume it targets different Resource.
if len(labelSelector) == 0 {
return false
}
for label, value := range labelSelector {
if rsValue, ok := testedObjectLabels[label]; !ok || rsValue != value {
return false
}
}
return true
}
// Returns true when a resource with the given selector targets the same Resources(or subset)
// that a tested object selector with the given selector.
func IsLabelSelectorMatching(selector map[string]string,
labelSelector *unversioned.LabelSelector) bool {
// If the resource has no selectors, then assume it targets different Pods.
if len(selector) == 0 {
return false
}
for label, value := range selector {
if rsValue, ok := labelSelector.MatchLabels[label]; !ok || rsValue != value {
return false
}
}
return true
}