ContainerImage.Pinniped/internal/autoregistration/autoregistration.go

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/*
Copyright 2020 VMware, Inc.
SPDX-License-Identifier: Apache-2.0
*/
// Package autoregistration updates the pre-registered APIService.
package autoregistration
import (
"context"
"fmt"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/util/retry"
aggregatationv1client "k8s.io/kube-aggregator/pkg/client/clientset_generated/clientset"
placeholderv1alpha1 "github.com/suzerain-io/placeholder-name/kubernetes/1.19/api/apis/placeholder/v1alpha1"
)
// UpdateAPIService updates the APIService's CA bundle.
func UpdateAPIService(ctx context.Context, aggregationV1 aggregatationv1client.Interface, aggregatedAPIServerCA []byte) error {
apiServices := aggregationV1.ApiregistrationV1().APIServices()
apiServiceName := placeholderv1alpha1.SchemeGroupVersion.Version + "." + placeholderv1alpha1.GroupName
if err := retry.RetryOnConflict(retry.DefaultRetry, func() error {
// Retrieve the latest version of the Service before attempting update.
// RetryOnConflict uses exponential backoff to avoid exhausting the API server.
fetchedAPIService, err := apiServices.Get(ctx, apiServiceName, metav1.GetOptions{})
if err != nil {
return fmt.Errorf("could not get existing version of API service: %w", err)
}
// Update just the field we care about.
fetchedAPIService.Spec.CABundle = aggregatedAPIServerCA
_, updateErr := apiServices.Update(ctx, fetchedAPIService, metav1.UpdateOptions{})
return updateErr
}); err != nil {
return fmt.Errorf("could not update API service: %w", err)
}
return nil
}