84 lines
2.4 KiB
Go
84 lines
2.4 KiB
Go
// Copyright 2021 the Pinniped contributors. All Rights Reserved.
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// SPDX-License-Identifier: Apache-2.0
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package deploymentref
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import (
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"context"
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"fmt"
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"time"
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appsv1 "k8s.io/api/apps/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/client-go/kubernetes"
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"go.pinniped.dev/internal/downward"
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"go.pinniped.dev/internal/kubeclient"
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"go.pinniped.dev/internal/ownerref"
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)
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// getTempClient is stubbed out for testing.
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//
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// We would normally pass a kubernetes.Interface into New(), but the client we want to create in
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// the calling code depends on the return value of New() (i.e., on the kubeclient.Option for the
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// OwnerReference).
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//nolint: gochecknoglobals
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var getTempClient = func() (kubernetes.Interface, error) {
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client, err := kubeclient.New()
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if err != nil {
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return nil, err
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}
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return client.Kubernetes, nil
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}
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func New(podInfo *downward.PodInfo) (kubeclient.Option, *appsv1.Deployment, error) {
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tempClient, err := getTempClient()
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if err != nil {
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return nil, nil, fmt.Errorf("cannot create temp client: %w", err)
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}
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deployment, err := getDeployment(tempClient, podInfo)
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if err != nil {
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return nil, nil, fmt.Errorf("cannot get deployment: %w", err)
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}
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// work around stupid behavior of WithoutVersionDecoder.Decode
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deployment.APIVersion, deployment.Kind = appsv1.SchemeGroupVersion.WithKind("Deployment").ToAPIVersionAndKind()
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return kubeclient.WithMiddleware(ownerref.New(deployment)), deployment, nil
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}
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func getDeployment(kubeClient kubernetes.Interface, podInfo *downward.PodInfo) (*appsv1.Deployment, error) {
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ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
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defer cancel()
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ns := podInfo.Namespace
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pod, err := kubeClient.CoreV1().Pods(ns).Get(ctx, podInfo.Name, metav1.GetOptions{})
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if err != nil {
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return nil, fmt.Errorf("could not get pod: %w", err)
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}
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podOwner := metav1.GetControllerOf(pod)
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if podOwner == nil {
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return nil, fmt.Errorf("pod %s/%s is missing owner", ns, podInfo.Name)
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}
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rs, err := kubeClient.AppsV1().ReplicaSets(ns).Get(ctx, podOwner.Name, metav1.GetOptions{})
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if err != nil {
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return nil, fmt.Errorf("could not get replicaset: %w", err)
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}
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rsOwner := metav1.GetControllerOf(rs)
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if rsOwner == nil {
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return nil, fmt.Errorf("replicaset %s/%s is missing owner", ns, podInfo.Name)
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}
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d, err := kubeClient.AppsV1().Deployments(ns).Get(ctx, rsOwner.Name, metav1.GetOptions{})
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if err != nil {
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return nil, fmt.Errorf("could not get deployment: %w", err)
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}
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return d, nil
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}
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