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deployment_adapter.go
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deployment_adapter.go
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/*
Copyright 2020 The Kruise Authors.
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 adapter
import (
"context"
"fmt"
appsv1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
alpha1 "github.com/openkruise/kruise/apis/apps/v1alpha1"
"github.com/openkruise/kruise/pkg/util/refmanager"
)
// DeploymentAdapter implements the Adapter interface for Deployment objects
type DeploymentAdapter struct {
client.Client
Scheme *runtime.Scheme
}
// NewResourceObject creates a empty Deployment object.
func (a *DeploymentAdapter) NewResourceObject() client.Object {
return &appsv1.Deployment{}
}
// NewResourceListObject creates a empty DeploymentList object.
func (a *DeploymentAdapter) NewResourceListObject() client.ObjectList {
return &appsv1.DeploymentList{}
}
// GetStatusObservedGeneration returns the observed generation of the subset.
func (a *DeploymentAdapter) GetStatusObservedGeneration(obj metav1.Object) int64 {
return obj.(*appsv1.Deployment).Status.ObservedGeneration
}
// GetReplicaDetails returns the replicas detail the subset needs.
func (a *DeploymentAdapter) GetReplicaDetails(obj metav1.Object, updatedRevision string) (specReplicas, specPartition *int32, statusReplicas, statusReadyReplicas, statusUpdatedReplicas, statusUpdatedReadyReplicas int32, err error) {
// Convert to Deployment Object
set := obj.(*appsv1.Deployment)
// Get all pods belonging to deployment
var pods []*corev1.Pod
pods, err = a.getDeploymentPods(set)
if err != nil {
return
}
// Set according replica counts
specReplicas = set.Spec.Replicas
statusReplicas = set.Status.Replicas
statusReadyReplicas = set.Status.ReadyReplicas
statusUpdatedReplicas, statusUpdatedReadyReplicas = calculateUpdatedReplicas(pods, updatedRevision)
return
}
// GetSubsetFailure returns the failure information of the subset.
// Deployment has no condition.
func (a *DeploymentAdapter) GetSubsetFailure() *string {
return nil
}
// ApplySubsetTemplate updates the subset to the latest revision, depending on the DeploymentTemplate.
func (a *DeploymentAdapter) ApplySubsetTemplate(ud *alpha1.UnitedDeployment, subsetName, revision string, replicas, partition int32, obj runtime.Object) error {
// Convert to Deployment Object
set := obj.(*appsv1.Deployment)
// Retrieve subset configuration based on UnitedDeployment spec
var subSetConfig *alpha1.Subset
for _, subset := range ud.Spec.Topology.Subsets {
if subset.Name == subsetName {
subSetConfig = &subset
break
}
}
if subSetConfig == nil {
return fmt.Errorf("fail to find subset config %s", subsetName)
}
set.Namespace = ud.Namespace
// Set correct labels
if set.Labels == nil {
set.Labels = map[string]string{}
}
for k, v := range ud.Spec.Template.DeploymentTemplate.Labels {
set.Labels[k] = v
}
for k, v := range ud.Spec.Selector.MatchLabels {
set.Labels[k] = v
}
set.Labels[alpha1.ControllerRevisionHashLabelKey] = revision
// record the subset name as a label
set.Labels[alpha1.SubSetNameLabelKey] = subsetName
// Set correct annotations
if set.Annotations == nil {
set.Annotations = map[string]string{}
}
for k, v := range ud.Spec.Template.DeploymentTemplate.Annotations {
set.Annotations[k] = v
}
// Generate unique name for deployment
set.GenerateName = getSubsetPrefix(ud.Name, subsetName)
// Set correct selectors
selectors := ud.Spec.Selector.DeepCopy()
selectors.MatchLabels[alpha1.SubSetNameLabelKey] = subsetName
// Set Deployment object's owner reference to UnitedDeployment object
if err := controllerutil.SetControllerReference(ud, set, a.Scheme); err != nil {
return err
}
set.Spec.Selector = selectors
set.Spec.Replicas = &replicas
set.Spec.Template = *ud.Spec.Template.DeploymentTemplate.Spec.Template.DeepCopy()
if set.Spec.Template.Labels == nil {
set.Spec.Template.Labels = map[string]string{}
}
set.Spec.Template.Labels[alpha1.SubSetNameLabelKey] = subsetName
set.Spec.Template.Labels[alpha1.ControllerRevisionHashLabelKey] = revision
set.Spec.RevisionHistoryLimit = ud.Spec.Template.DeploymentTemplate.Spec.RevisionHistoryLimit
attachNodeAffinity(&set.Spec.Template.Spec, subSetConfig)
attachTolerations(&set.Spec.Template.Spec, subSetConfig)
return nil
}
// PostUpdate does some works after subset updated. Deployments typically don't have post update operations.
func (a *DeploymentAdapter) PostUpdate(ud *alpha1.UnitedDeployment, obj runtime.Object, revision string, partition int32) error {
return nil
}
// IsExpected checks the subset is the expected revision or not.
// The revision label can tell the current subset revision.
func (a *DeploymentAdapter) IsExpected(obj metav1.Object, revision string) bool {
return obj.GetLabels()[appsv1.ControllerRevisionHashLabelKey] != revision
}
// getDeploymentPods gets all Pods under a Deployment object
func (a *DeploymentAdapter) getDeploymentPods(set *appsv1.Deployment) ([]*corev1.Pod, error) {
deploymentReplicaSets, err := a.getDeploymentReplicaSets(set)
if err != nil {
return nil, err
}
var deploymentPods []*corev1.Pod
for _, replicaSet := range deploymentReplicaSets {
replicaSetPods, err := a.getReplicaSetPods(replicaSet)
if err != nil {
return nil, err
}
deploymentPods = append(deploymentPods, replicaSetPods...)
}
return deploymentPods, nil
}
// getDeploymentReplicaSets gets all ReplicaSets under a Deployment object
func (a *DeploymentAdapter) getDeploymentReplicaSets(set *appsv1.Deployment) ([]*appsv1.ReplicaSet, error) {
// Retrieve correct selectors to use
selector, err := metav1.LabelSelectorAsSelector(set.Spec.Selector)
if err != nil {
return nil, err
}
// Retrieve ReplicaSets based on selectors
replicaSetList := &appsv1.ReplicaSetList{}
err = a.Client.List(context.TODO(), replicaSetList, &client.ListOptions{LabelSelector: selector})
if err != nil {
return nil, err
}
// The remainder of the function retrieves ReplicaSets owned by the set Deployment argument
manager, err := refmanager.New(a.Client, set.Spec.Selector, set, a.Scheme)
if err != nil {
return nil, err
}
selected := make([]metav1.Object, len(replicaSetList.Items))
for i, replicaSet := range replicaSetList.Items {
selected[i] = replicaSet.DeepCopy()
}
claimed, err := manager.ClaimOwnedObjects(selected)
if err != nil {
return nil, err
}
claimedReplicaSets := make([]*appsv1.ReplicaSet, len(claimed))
for i, replicaSet := range claimed {
claimedReplicaSets[i] = replicaSet.(*appsv1.ReplicaSet)
}
return claimedReplicaSets, nil
}
// getReplicaSetPods gets all pods under a ReplicaSet object
func (a *DeploymentAdapter) getReplicaSetPods(set *appsv1.ReplicaSet) ([]*corev1.Pod, error) {
// Retrieve correct selectors to use
selector, err := metav1.LabelSelectorAsSelector(set.Spec.Selector)
if err != nil {
return nil, err
}
// Retrieve all pods using selector
podList := &corev1.PodList{}
err = a.Client.List(context.TODO(), podList, &client.ListOptions{LabelSelector: selector})
if err != nil {
return nil, err
}
// The remainder of this function retrieves Pods owned by the set ReplicaSet argument
manager, err := refmanager.New(a.Client, set.Spec.Selector, set, a.Scheme)
if err != nil {
return nil, err
}
selected := make([]metav1.Object, len(podList.Items))
for i, pod := range podList.Items {
selected[i] = pod.DeepCopy()
}
claimed, err := manager.ClaimOwnedObjects(selected)
if err != nil {
return nil, err
}
claimedPods := make([]*corev1.Pod, len(claimed))
for i, pod := range claimed {
claimedPods[i] = pod.(*corev1.Pod)
}
return claimedPods, nil
}