91 lines
2.9 KiB
Go
91 lines
2.9 KiB
Go
/*
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Copyright 2014 The Kubernetes 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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// This code is directly lifted from the Kubernetes codebase in order to avoid relying on the k8s.io/kubernetes package.
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// For reference:
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// https://github.com/kubernetes/kubernetes/blob/release-1.23/pkg/controller/controller_utils.go#L466-L495
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// https://github.com/kubernetes/kubernetes/blob/release-1.23/pkg/controller/controller_utils.go#L539-L562
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package lifted
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import (
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"fmt"
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corev1 "k8s.io/api/core/v1"
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"k8s.io/apimachinery/pkg/api/meta"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/apimachinery/pkg/runtime"
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)
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func getPodsLabelSet(template *corev1.PodTemplateSpec) labels.Set {
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desiredLabels := make(labels.Set)
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for k, v := range template.Labels {
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desiredLabels[k] = v
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}
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return desiredLabels
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}
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func getPodsFinalizers(template *corev1.PodTemplateSpec) []string {
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desiredFinalizers := make([]string, len(template.Finalizers))
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copy(desiredFinalizers, template.Finalizers)
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return desiredFinalizers
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}
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func getPodsAnnotationSet(template *corev1.PodTemplateSpec) labels.Set {
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desiredAnnotations := make(labels.Set)
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for k, v := range template.Annotations {
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desiredAnnotations[k] = v
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}
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return desiredAnnotations
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}
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func getPodsPrefix(controllerName string) string {
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// use the dash (if the name isn't too long) to make the pod name a bit prettier
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prefix := fmt.Sprintf("%s-", controllerName)
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if len(ValidatePodName(prefix, true)) != 0 {
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prefix = controllerName
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}
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return prefix
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}
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// GetPodFromTemplate generates pod object from a template.
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func GetPodFromTemplate(template *corev1.PodTemplateSpec, parentObject runtime.Object, controllerRef *metav1.OwnerReference) (*corev1.Pod, error) {
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desiredLabels := getPodsLabelSet(template)
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desiredFinalizers := getPodsFinalizers(template)
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desiredAnnotations := getPodsAnnotationSet(template)
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accessor, err := meta.Accessor(parentObject)
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if err != nil {
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return nil, fmt.Errorf("parentObject does not have ObjectMeta, %v", err)
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}
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prefix := getPodsPrefix(accessor.GetName())
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pod := &corev1.Pod{
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ObjectMeta: metav1.ObjectMeta{
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Labels: desiredLabels,
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Annotations: desiredAnnotations,
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GenerateName: prefix,
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Finalizers: desiredFinalizers,
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Namespace: accessor.GetNamespace(),
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},
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}
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if controllerRef != nil {
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pod.OwnerReferences = append(pod.OwnerReferences, *controllerRef)
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}
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pod.Spec = *template.Spec.DeepCopy()
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return pod, nil
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}
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