pkg/plugins/runtime/k8s/controllers/serviceless_name_extractor.go

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 controllers

import (
	"context"
)

import (
	kube_apps "k8s.io/api/apps/v1"

	kube_batch "k8s.io/api/batch/v1"

	kube_core "k8s.io/api/core/v1"

	kube_client "sigs.k8s.io/controller-runtime/pkg/client"
)

type NameExtractor struct {
	ReplicaSetGetter kube_client.Reader
	JobGetter        kube_client.Reader
}

func (n *NameExtractor) Name(ctx context.Context, pod *kube_core.Pod) (string, string, error) {
	owners := pod.GetObjectMeta().GetOwnerReferences()
	namespace := pod.Namespace
	for _, owner := range owners {
		switch owner.Kind {
		case "ReplicaSet":
			rs := &kube_apps.ReplicaSet{}
			rsKey := kube_client.ObjectKey{Namespace: namespace, Name: owner.Name}
			if err := n.ReplicaSetGetter.Get(ctx, rsKey, rs); err != nil {
				return "", "", err
			}
			if len(rs.OwnerReferences) == 0 {
				return rs.Name, rs.Kind, nil
			}
			rsOwners := rs.GetObjectMeta().GetOwnerReferences()
			for _, o := range rsOwners {
				if o.Kind == "Deployment" {
					return o.Name, o.Kind, nil
				}
			}
		case "Job":
			cj := &kube_batch.Job{}
			cjKey := kube_client.ObjectKey{Namespace: namespace, Name: owner.Name}
			if err := n.JobGetter.Get(ctx, cjKey, cj); err != nil {
				return "", "", err
			}
			if len(cj.OwnerReferences) == 0 {
				return cj.Name, cj.Kind, nil
			}
			jobOwners := cj.GetObjectMeta().GetOwnerReferences()
			for _, o := range jobOwners {
				if o.Kind == "CronJob" {
					return o.Name, o.Kind, nil
				}
			}
		default:
			return owner.Name, owner.Kind, nil
		}
	}
	return pod.Name, pod.Kind, nil
}