113 lines
4.0 KiB
Go
113 lines
4.0 KiB
Go
/*
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Copyright 2021 The Karmada Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package native
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import (
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appsv1 "k8s.io/api/apps/v1"
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batchv1 "k8s.io/api/batch/v1"
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corev1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/klog/v2"
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"k8s.io/utils/ptr"
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workv1alpha2 "github.com/karmada-io/karmada/pkg/apis/work/v1alpha2"
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"github.com/karmada-io/karmada/pkg/util"
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"github.com/karmada-io/karmada/pkg/util/helper"
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)
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// replicaInterpreter is the function that used to parse replica and requirements from object.
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type replicaInterpreter func(object *unstructured.Unstructured) (int32, *workv1alpha2.ReplicaRequirements, error)
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func getAllDefaultReplicaInterpreter() map[schema.GroupVersionKind]replicaInterpreter {
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s := make(map[schema.GroupVersionKind]replicaInterpreter)
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s[appsv1.SchemeGroupVersion.WithKind(util.DeploymentKind)] = deployReplica
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s[appsv1.SchemeGroupVersion.WithKind(util.StatefulSetKind)] = statefulSetReplica
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s[batchv1.SchemeGroupVersion.WithKind(util.JobKind)] = jobReplica
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s[corev1.SchemeGroupVersion.WithKind(util.PodKind)] = podReplica
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return s
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}
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func deployReplica(object *unstructured.Unstructured) (int32, *workv1alpha2.ReplicaRequirements, error) {
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deploy := &appsv1.Deployment{}
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if err := helper.ConvertToTypedObject(object, deploy); err != nil {
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klog.Errorf("Failed to convert object(%s), err %v", object.GroupVersionKind().String(), err)
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return 0, nil, err
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}
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var replica int32
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if deploy.Spec.Replicas != nil {
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replica = *deploy.Spec.Replicas
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}
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requirement := helper.GenerateReplicaRequirements(&deploy.Spec.Template)
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return replica, requirement, nil
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}
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func statefulSetReplica(object *unstructured.Unstructured) (int32, *workv1alpha2.ReplicaRequirements, error) {
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sts := &appsv1.StatefulSet{}
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if err := helper.ConvertToTypedObject(object, sts); err != nil {
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klog.Errorf("Failed to convert object(%s), err %v", object.GroupVersionKind().String(), err)
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return 0, nil, err
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}
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var replica int32
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if sts.Spec.Replicas != nil {
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replica = *sts.Spec.Replicas
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}
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requirement := helper.GenerateReplicaRequirements(&sts.Spec.Template)
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return replica, requirement, nil
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}
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func jobReplica(object *unstructured.Unstructured) (int32, *workv1alpha2.ReplicaRequirements, error) {
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job := &batchv1.Job{}
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err := helper.ConvertToTypedObject(object, job)
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if err != nil {
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klog.Errorf("Failed to convert object(%s), err %v", object.GroupVersionKind().String(), err)
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return 0, nil, err
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}
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var replica int32
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// parallelism might never be nil as the kube-apiserver will set it to 1 by default if not specified.
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if job.Spec.Parallelism != nil {
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replica = *job.Spec.Parallelism
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}
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// For fixed completion count Jobs, the actual number of pods running in parallel will not exceed the number of remaining completions.
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// Higher values of .spec.parallelism are effectively ignored.
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// More info: https://kubernetes.io/docs/concepts/workloads/controllers/job/
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completions := ptr.Deref[int32](job.Spec.Completions, replica)
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if replica > completions {
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replica = completions
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}
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requirement := helper.GenerateReplicaRequirements(&job.Spec.Template)
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return replica, requirement, nil
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}
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func podReplica(object *unstructured.Unstructured) (int32, *workv1alpha2.ReplicaRequirements, error) {
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pod := &corev1.Pod{}
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err := helper.ConvertToTypedObject(object, pod)
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if err != nil {
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klog.Errorf("Failed to convert object(%s), err %v", object.GroupVersionKind().String(), err)
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return 0, nil, err
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}
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// For Pod, its replica is always 1.
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return 1, helper.GenerateReplicaRequirements(&corev1.PodTemplateSpec{Spec: pod.Spec}), nil
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}
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