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talos_managed.go
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talos_managed.go
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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
package kubernetes
import (
"context"
"errors"
"fmt"
"strings"
"time"
"github.com/cosi-project/runtime/pkg/resource"
"github.com/cosi-project/runtime/pkg/state"
"github.com/siderolabs/gen/channel"
"github.com/siderolabs/go-kubernetes/kubernetes/manifests"
"github.com/siderolabs/go-kubernetes/kubernetes/upgrade"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/status"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/client-go/informers"
"k8s.io/client-go/tools/cache"
"github.com/siderolabs/talos/pkg/cluster"
"github.com/siderolabs/talos/pkg/machinery/api/common"
"github.com/siderolabs/talos/pkg/machinery/client"
machinetype "github.com/siderolabs/talos/pkg/machinery/config/machine"
v1alpha1config "github.com/siderolabs/talos/pkg/machinery/config/types/v1alpha1"
"github.com/siderolabs/talos/pkg/machinery/constants"
"github.com/siderolabs/talos/pkg/machinery/resources/k8s"
)
// UpgradeProvider are the cluster interfaces required by upgrade process.
type UpgradeProvider interface {
cluster.ClientProvider
cluster.K8sProvider
}
// Upgrade the Kubernetes control plane components, manifests, kubelets.
//
//nolint:gocyclo
func Upgrade(ctx context.Context, cluster UpgradeProvider, options UpgradeOptions) error {
if !options.Path.IsSupported() {
return fmt.Errorf("unsupported upgrade path %s (from %q to %q)", options.Path, options.Path.FromVersion(), options.Path.ToVersion())
}
k8sClient, err := cluster.K8sHelper(ctx)
if err != nil {
return fmt.Errorf("error building kubernetes client: %w", err)
}
defer k8sClient.Close() //nolint:errcheck
options.controlPlaneNodes, err = k8sClient.NodeIPs(ctx, machinetype.TypeControlPlane)
if err != nil {
return fmt.Errorf("error fetching controlplane nodes: %w", err)
}
if len(options.controlPlaneNodes) == 0 {
return errors.New("no controlplane nodes discovered")
}
options.Log("discovered controlplane nodes %q", options.controlPlaneNodes)
if options.UpgradeKubelet {
options.workerNodes, err = k8sClient.NodeIPs(ctx, machinetype.TypeWorker)
if err != nil {
return fmt.Errorf("error fetching worker nodes: %w", err)
}
options.Log("discovered worker nodes %q", options.workerNodes)
}
talosClient, err := cluster.Client()
if err != nil {
return err
}
k8sConfig, err := cluster.K8sRestConfig(ctx)
if err != nil {
return err
}
upgradeChecks, err := upgrade.NewChecks(options.Path, talosClient.COSI, k8sConfig, options.controlPlaneNodes, options.workerNodes, options.Log)
if err != nil {
return err
}
if err = upgradeChecks.Run(ctx); err != nil {
return err
}
if options.PrePullImages {
if err = prePullImages(ctx, talosClient, options); err != nil {
return fmt.Errorf("failed pre-pulling images: %w", err)
}
}
for _, service := range []string{kubeAPIServer, kubeControllerManager, kubeScheduler} {
if err = upgradeStaticPod(ctx, cluster, options, service); err != nil {
return fmt.Errorf("failed updating service %q: %w", service, err)
}
}
if err = upgradeKubeProxy(ctx, cluster, options); err != nil {
return fmt.Errorf("failed updating kube-proxy: %w", err)
}
if err = upgradeKubelet(ctx, cluster, options); err != nil {
return fmt.Errorf("failed upgrading kubelet: %w", err)
}
objects, err := getManifests(ctx, cluster)
if err != nil {
return err
}
return syncManifests(ctx, objects, cluster, options)
}
func prePullImages(ctx context.Context, talosClient *client.Client, options UpgradeOptions) error {
for _, imageRef := range []string{
fmt.Sprintf("%s:v%s", options.APIServerImage, options.Path.ToVersion()),
fmt.Sprintf("%s:v%s", options.ControllerManagerImage, options.Path.ToVersion()),
fmt.Sprintf("%s:v%s", options.SchedulerImage, options.Path.ToVersion()),
} {
for _, node := range options.controlPlaneNodes {
options.Log(" > %q: pre-pulling %s", node, imageRef)
err := talosClient.ImagePull(client.WithNode(ctx, node), common.ContainerdNamespace_NS_CRI, imageRef)
if err != nil {
if status.Code(err) == codes.Unimplemented {
options.Log(" < %q: not implemented, skipping", node)
} else {
return fmt.Errorf("error pre-pulling %s on %s: %w", imageRef, node, err)
}
}
}
}
if !options.UpgradeKubelet {
return nil
}
imageRef := fmt.Sprintf("%s:v%s", options.KubeletImage, options.Path.ToVersion())
for _, node := range append(append([]string(nil), options.controlPlaneNodes...), options.workerNodes...) {
options.Log(" > %q: pre-pulling %s", node, imageRef)
err := talosClient.ImagePull(client.WithNode(ctx, node), common.ContainerdNamespace_NS_SYSTEM, imageRef)
if err != nil {
if status.Code(err) == codes.Unimplemented {
options.Log(" < %q: not implemented, skipping", node)
} else {
return fmt.Errorf("error pre-pulling %s on %s: %w", imageRef, node, err)
}
}
}
return nil
}
func upgradeStaticPod(ctx context.Context, cluster UpgradeProvider, options UpgradeOptions, service string) error {
options.Log("updating %q to version %q", service, options.Path.ToVersion())
for _, node := range options.controlPlaneNodes {
if err := upgradeStaticPodOnNode(ctx, cluster, options, service, node); err != nil {
return fmt.Errorf("error updating node %q: %w", node, err)
}
}
return nil
}
func upgradeKubeProxy(ctx context.Context, cluster UpgradeProvider, options UpgradeOptions) error {
options.Log("updating kube-proxy to version %q", options.Path.ToVersion())
for _, node := range options.controlPlaneNodes {
options.Log(" > %q: starting update", node)
if err := patchNodeConfig(ctx, cluster, node, options.EncoderOpt, patchKubeProxy(options)); err != nil {
return fmt.Errorf("error updating node %q: %w", node, err)
}
}
return nil
}
func patchKubeProxy(options UpgradeOptions) func(config *v1alpha1config.Config) error {
return func(config *v1alpha1config.Config) error {
if options.DryRun {
options.Log(" > skipped in dry-run")
return nil
}
if config.ClusterConfig == nil {
config.ClusterConfig = &v1alpha1config.ClusterConfig{}
}
if config.ClusterConfig.ProxyConfig == nil {
config.ClusterConfig.ProxyConfig = &v1alpha1config.ProxyConfig{}
}
config.ClusterConfig.ProxyConfig.ContainerImage = fmt.Sprintf("%s:v%s", options.ProxyImage, options.Path.ToVersion())
return nil
}
}
func controlplaneConfigResourceType(service string) resource.Type {
switch service {
case kubeAPIServer:
return k8s.APIServerConfigType
case kubeControllerManager:
return k8s.ControllerManagerConfigType
case kubeScheduler:
return k8s.SchedulerConfigType
}
panic(fmt.Sprintf("unknown service ID %q", service))
}
//nolint:gocyclo
func upgradeStaticPodOnNode(ctx context.Context, cluster UpgradeProvider, options UpgradeOptions, service, node string) error {
ctx, cancel := context.WithCancel(ctx)
defer cancel()
c, err := cluster.Client()
if err != nil {
return fmt.Errorf("error building Talos API client: %w", err)
}
ctx = client.WithNode(ctx, node)
options.Log(" > %q: starting update", node)
watchCh := make(chan state.Event)
if err = c.COSI.Watch(ctx, resource.NewMetadata(k8s.ControlPlaneNamespaceName, controlplaneConfigResourceType(service), service, resource.VersionUndefined), watchCh); err != nil {
return fmt.Errorf("error watching service configuration: %w", err)
}
var (
expectedConfigVersion string
initialConfig resource.Resource
)
select {
case ev := <-watchCh:
if ev.Type != state.Created {
return fmt.Errorf("unexpected event type: %d", ev.Type)
}
expectedConfigVersion = ev.Resource.Metadata().Version().String()
initialConfig = ev.Resource
case <-ctx.Done():
return ctx.Err()
}
skipConfigWait := false
err = patchNodeConfig(ctx, cluster, node, options.EncoderOpt, upgradeStaticPodPatcher(options, service, initialConfig))
if err != nil {
if errors.Is(err, errUpdateSkipped) {
skipConfigWait = true
} else {
return fmt.Errorf("error patching node config: %w", err)
}
}
if options.DryRun {
return nil
}
options.Log(" > %q: machine configuration patched", node)
options.Log(" > %q: waiting for %s pod update", node, service)
if !skipConfigWait {
select {
case ev := <-watchCh:
if ev.Type != state.Updated {
return fmt.Errorf("unexpected event type: %d", ev.Type)
}
expectedConfigVersion = ev.Resource.Metadata().Version().String()
case <-ctx.Done():
return ctx.Err()
}
}
if err = checkPodStatus(ctx, cluster, options, service, node, expectedConfigVersion); err != nil {
return err
}
options.Log(" < %q: successfully updated", node)
return nil
}
var errUpdateSkipped = errors.New("update skipped")
func staticPodImage(logUpdate func(oldImage string), imageName, containerImage, configImage string, options UpgradeOptions) (string, error) {
image := fmt.Sprintf("%s:v%s", imageName, options.Path.ToVersion())
if containerImage == image || configImage == image {
return "", errUpdateSkipped
}
logUpdate(containerImage)
if options.DryRun {
return "", errUpdateSkipped
}
return image, nil
}
//nolint:gocyclo
func upgradeStaticPodPatcher(options UpgradeOptions, service string, configResource resource.Resource) func(config *v1alpha1config.Config) error {
return func(config *v1alpha1config.Config) error {
if config.ClusterConfig == nil {
config.ClusterConfig = &v1alpha1config.ClusterConfig{}
}
var configImage string
switch r := configResource.(type) {
case *k8s.APIServerConfig:
configImage = r.TypedSpec().Image
case *k8s.ControllerManagerConfig:
configImage = r.TypedSpec().Image
case *k8s.SchedulerConfig:
configImage = r.TypedSpec().Image
default:
return fmt.Errorf("unsupported service config %T", configResource)
}
logUpdate := func(oldImage string) {
parts := strings.Split(oldImage, ":")
version := options.Path.FromVersion()
if oldImage == "" {
version = options.Path.FromVersion()
}
if len(parts) > 1 {
version = parts[1]
}
options.Log(" > update %s: %s -> %s", service, version, options.Path.ToVersion())
if options.DryRun {
options.Log(" > skipped in dry-run")
}
}
switch service {
case kubeAPIServer:
if config.ClusterConfig.APIServerConfig == nil {
config.ClusterConfig.APIServerConfig = &v1alpha1config.APIServerConfig{}
}
image, err := staticPodImage(logUpdate,
options.APIServerImage,
config.ClusterConfig.APIServerConfig.ContainerImage,
configImage,
options)
if err != nil {
return err
}
config.ClusterConfig.APIServerConfig.ContainerImage = image
case kubeControllerManager:
if config.ClusterConfig.ControllerManagerConfig == nil {
config.ClusterConfig.ControllerManagerConfig = &v1alpha1config.ControllerManagerConfig{}
}
image, err := staticPodImage(logUpdate,
options.ControllerManagerImage,
config.ClusterConfig.ControllerManagerConfig.ContainerImage,
configImage,
options)
if err != nil {
return err
}
config.ClusterConfig.ControllerManagerConfig.ContainerImage = image
case kubeScheduler:
if config.ClusterConfig.SchedulerConfig == nil {
config.ClusterConfig.SchedulerConfig = &v1alpha1config.SchedulerConfig{}
}
image, err := staticPodImage(logUpdate,
options.SchedulerImage,
config.ClusterConfig.SchedulerConfig.ContainerImage,
configImage,
options)
if err != nil {
return err
}
config.ClusterConfig.SchedulerConfig.ContainerImage = image
default:
return fmt.Errorf("unsupported service %q", service)
}
return nil
}
}
func getManifests(ctx context.Context, cluster UpgradeProvider) ([]*unstructured.Unstructured, error) {
talosclient, err := cluster.Client()
if err != nil {
return nil, err
}
defer cluster.Close() //nolint:errcheck
md, _ := metadata.FromOutgoingContext(ctx)
if nodes := md["nodes"]; len(nodes) > 0 {
ctx = client.WithNode(ctx, nodes[0])
}
return manifests.GetBootstrapManifests(ctx, talosclient.COSI, nil)
}
func syncManifests(ctx context.Context, objects []*unstructured.Unstructured, cluster UpgradeProvider, options UpgradeOptions) error {
config, err := cluster.K8sRestConfig(ctx)
if err != nil {
return err
}
return manifests.SyncWithLog(ctx, objects, config, options.DryRun, options.Log)
}
//nolint:gocyclo
func checkPodStatus(ctx context.Context, cluster UpgradeProvider, options UpgradeOptions, service, node, configVersion string) error {
ctx, cancel := context.WithTimeout(ctx, 5*time.Minute)
defer cancel()
k8sClient, err := cluster.K8sHelper(ctx)
if err != nil {
return fmt.Errorf("error building kubernetes client: %w", err)
}
defer k8sClient.Close() //nolint:errcheck
informerFactory := informers.NewSharedInformerFactoryWithOptions(
k8sClient, 10*time.Second,
informers.WithNamespace(namespace),
informers.WithTweakListOptions(func(options *metav1.ListOptions) {
options.LabelSelector = fmt.Sprintf("k8s-app = %s", service)
}),
)
notifyCh := make(chan *v1.Pod)
informer := informerFactory.Core().V1().Pods().Informer()
if err := informer.SetWatchErrorHandler(func(r *cache.Reflector, err error) {
options.Log("kubernetes endpoint watch error: %s", err)
}); err != nil {
return fmt.Errorf("error setting watch error handler: %w", err)
}
if _, err := informer.AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) { channel.SendWithContext(ctx, notifyCh, obj.(*v1.Pod)) },
DeleteFunc: func(_ interface{}) {},
UpdateFunc: func(_, obj interface{}) { channel.SendWithContext(ctx, notifyCh, obj.(*v1.Pod)) },
}); err != nil {
return fmt.Errorf("error adding watch event handler: %w", err)
}
informerFactory.Start(ctx.Done())
defer func() {
cancel()
informerFactory.Shutdown()
}()
for {
select {
case <-ctx.Done():
return ctx.Err()
case pod := <-notifyCh:
if pod.Status.HostIP != node {
continue
}
if pod.Annotations[constants.AnnotationStaticPodConfigVersion] != configVersion {
options.Log(" > %q: %s: waiting, config version mismatch: got %q, expected %q", node, service, pod.Annotations[constants.AnnotationStaticPodConfigVersion], configVersion)
continue
}
ready := false
for _, condition := range pod.Status.Conditions {
if condition.Type != v1.PodReady {
continue
}
if condition.Status == v1.ConditionTrue {
ready = true
break
}
}
if !ready {
options.Log(" > %q: %s: pod is not ready, waiting", node, service)
continue
}
return nil
}
}
}