45 lines
1.5 KiB
Go
45 lines
1.5 KiB
Go
// Copyright 2020 the Pinniped contributors. All Rights Reserved.
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// SPDX-License-Identifier: Apache-2.0
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package apicerts
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import (
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"bytes"
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"context"
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"fmt"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/client-go/util/retry"
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aggregatorclient "k8s.io/kube-aggregator/pkg/client/clientset_generated/clientset"
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pinnipedv1alpha1 "github.com/suzerain-io/pinniped/generated/1.19/apis/pinniped/v1alpha1"
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)
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// UpdateAPIService updates the APIService's CA bundle.
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func UpdateAPIService(ctx context.Context, aggregatorClient aggregatorclient.Interface, aggregatedAPIServerCA []byte) error {
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apiServices := aggregatorClient.ApiregistrationV1().APIServices()
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apiServiceName := pinnipedv1alpha1.SchemeGroupVersion.Version + "." + pinnipedv1alpha1.GroupName
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if err := retry.RetryOnConflict(retry.DefaultRetry, func() error {
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// Retrieve the latest version of the Service.
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fetchedAPIService, err := apiServices.Get(ctx, apiServiceName, metav1.GetOptions{})
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if err != nil {
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return fmt.Errorf("could not get existing version of API service: %w", err)
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}
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if bytes.Equal(fetchedAPIService.Spec.CABundle, aggregatedAPIServerCA) {
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// Already has the same value, perhaps because another process already updated the object, so no need to update.
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return nil
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}
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// Update just the field we care about.
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fetchedAPIService.Spec.CABundle = aggregatedAPIServerCA
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_, updateErr := apiServices.Update(ctx, fetchedAPIService, metav1.UpdateOptions{})
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return updateErr
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}); err != nil {
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return fmt.Errorf("could not update API service: %w", err)
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}
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return nil
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}
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