101 lines
3.7 KiB
Go
101 lines
3.7 KiB
Go
package defaultinterpreter
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import (
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"fmt"
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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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"github.com/karmada-io/karmada/pkg/util"
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"github.com/karmada-io/karmada/pkg/util/helper"
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"github.com/karmada-io/karmada/pkg/util/lifted"
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)
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// retentionInterpreter is the function that retains values from "observed" object.
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type retentionInterpreter func(desired *unstructured.Unstructured, observed *unstructured.Unstructured) (retained *unstructured.Unstructured, err error)
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func getAllDefaultRetentionInterpreter() map[schema.GroupVersionKind]retentionInterpreter {
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s := make(map[schema.GroupVersionKind]retentionInterpreter)
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s[corev1.SchemeGroupVersion.WithKind(util.PodKind)] = retainPodFields
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s[corev1.SchemeGroupVersion.WithKind(util.ServiceKind)] = lifted.RetainServiceFields
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s[corev1.SchemeGroupVersion.WithKind(util.ServiceAccountKind)] = lifted.RetainServiceAccountFields
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s[corev1.SchemeGroupVersion.WithKind(util.PersistentVolumeClaimKind)] = retainPersistentVolumeClaimFields
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s[batchv1.SchemeGroupVersion.WithKind(util.JobKind)] = retainJobSelectorFields
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return s
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}
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func retainPodFields(desired, observed *unstructured.Unstructured) (*unstructured.Unstructured, error) {
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desiredPod := &corev1.Pod{}
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err := helper.ConvertToTypedObject(desired, desiredPod)
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if err != nil {
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return nil, fmt.Errorf("failed to convert desiredPod from unstructured object: %v", err)
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}
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clusterPod := &corev1.Pod{}
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err = helper.ConvertToTypedObject(observed, clusterPod)
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if err != nil {
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return nil, fmt.Errorf("failed to convert clusterPod from unstructured object: %v", err)
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}
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desiredPod.Spec.NodeName = clusterPod.Spec.NodeName
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desiredPod.Spec.ServiceAccountName = clusterPod.Spec.ServiceAccountName
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desiredPod.Spec.Volumes = clusterPod.Spec.Volumes
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// retain volumeMounts in each container
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for _, clusterContainer := range clusterPod.Spec.Containers {
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for desiredIndex, desiredContainer := range desiredPod.Spec.Containers {
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if desiredContainer.Name == clusterContainer.Name {
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desiredPod.Spec.Containers[desiredIndex].VolumeMounts = clusterContainer.VolumeMounts
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break
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}
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}
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}
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unstructuredObj, err := helper.ToUnstructured(desiredPod)
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if err != nil {
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return nil, fmt.Errorf("failed to transform Pod: %v", err)
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}
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return unstructuredObj, nil
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}
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func retainPersistentVolumeClaimFields(desired, observed *unstructured.Unstructured) (*unstructured.Unstructured, error) {
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// volumeName is allocated by member cluster and unchangeable, so it should be retained while updating
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volumeName, ok, err := unstructured.NestedString(observed.Object, "spec", "volumeName")
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if err != nil {
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return nil, fmt.Errorf("error retrieving volumeName from pvc: %w", err)
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}
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if ok && len(volumeName) > 0 {
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if err = unstructured.SetNestedField(desired.Object, volumeName, "spec", "volumeName"); err != nil {
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return nil, fmt.Errorf("error setting volumeName for pvc: %w", err)
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}
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}
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return desired, nil
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}
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func retainJobSelectorFields(desired, observed *unstructured.Unstructured) (*unstructured.Unstructured, error) {
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matchLabels, exist, err := unstructured.NestedStringMap(observed.Object, "spec", "selector", "matchLabels")
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if err != nil {
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return nil, err
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}
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if exist {
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err = unstructured.SetNestedStringMap(desired.Object, matchLabels, "spec", "selector", "matchLabels")
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if err != nil {
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return nil, err
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}
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}
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templateLabels, exist, err := unstructured.NestedStringMap(observed.Object, "spec", "template", "metadata", "labels")
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if err != nil {
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return nil, err
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}
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if exist {
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err = unstructured.SetNestedStringMap(desired.Object, templateLabels, "spec", "template", "metadata", "labels")
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if err != nil {
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return nil, err
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}
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}
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return desired, nil
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}
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