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kubernetes_pull.go
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kubernetes_pull.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 cluster
import (
"context"
"fmt"
"github.com/cosi-project/runtime/pkg/controller"
"github.com/cosi-project/runtime/pkg/resource"
"github.com/cosi-project/runtime/pkg/safe"
"github.com/cosi-project/runtime/pkg/state"
"github.com/siderolabs/gen/optional"
"go.uber.org/zap"
"github.com/siderolabs/talos/internal/pkg/discovery/registry"
"github.com/siderolabs/talos/pkg/conditions"
"github.com/siderolabs/talos/pkg/kubernetes"
"github.com/siderolabs/talos/pkg/machinery/constants"
"github.com/siderolabs/talos/pkg/machinery/resources/cluster"
"github.com/siderolabs/talos/pkg/machinery/resources/config"
"github.com/siderolabs/talos/pkg/machinery/resources/k8s"
)
// KubernetesPullController pulls list of Affiliate resource from the Kubernetes registry.
type KubernetesPullController struct{}
// Name implements controller.Controller interface.
func (ctrl *KubernetesPullController) Name() string {
return "cluster.KubernetesPullController"
}
// Inputs implements controller.Controller interface.
func (ctrl *KubernetesPullController) Inputs() []controller.Input {
return []controller.Input{
{
Namespace: config.NamespaceName,
Type: cluster.ConfigType,
ID: optional.Some(cluster.ConfigID),
Kind: controller.InputWeak,
},
{
Namespace: k8s.NamespaceName,
Type: k8s.NodenameType,
ID: optional.Some(k8s.NodenameID),
Kind: controller.InputWeak,
},
}
}
// Outputs implements controller.Controller interface.
func (ctrl *KubernetesPullController) Outputs() []controller.Output {
return []controller.Output{
{
Type: cluster.AffiliateType,
Kind: controller.OutputShared,
},
}
}
// Run implements controller.Controller interface.
//
//nolint:gocyclo,cyclop
func (ctrl *KubernetesPullController) Run(ctx context.Context, r controller.Runtime, logger *zap.Logger) error {
var (
kubernetesClient *kubernetes.Client
kubernetesRegistry *registry.Kubernetes
watchCtxCancel context.CancelFunc
notifyCh <-chan struct{}
notifyCloser func()
)
defer func() {
if watchCtxCancel != nil {
watchCtxCancel()
}
if notifyCloser != nil {
notifyCloser()
}
if kubernetesClient != nil {
kubernetesClient.Close() //nolint:errcheck
}
}()
for {
select {
case <-ctx.Done():
return nil
case <-r.EventCh():
case <-notifyCh:
}
discoveryConfig, err := safe.ReaderGetByID[*cluster.Config](ctx, r, cluster.ConfigID)
if err != nil {
if !state.IsNotFoundError(err) {
return fmt.Errorf("error getting discovery config: %w", err)
}
continue
}
if !discoveryConfig.TypedSpec().RegistryKubernetesEnabled {
// if discovery is disabled cleanup existing resources
if err = cleanupAffiliates(ctx, ctrl, r, nil); err != nil {
return err
}
continue
}
if err = conditions.WaitForKubeconfigReady(constants.KubeletKubeconfig).Wait(ctx); err != nil {
return err
}
nodename, err := safe.ReaderGetByID[*k8s.Nodename](ctx, r, k8s.NodenameID)
if err != nil {
if !state.IsNotFoundError(err) {
return fmt.Errorf("error getting nodename: %w", err)
}
continue
}
if kubernetesClient == nil {
kubernetesClient, err = kubernetes.NewClientFromKubeletKubeconfig()
if err != nil {
return fmt.Errorf("error building kubernetes client: %w", err)
}
}
if kubernetesRegistry == nil {
kubernetesRegistry = registry.NewKubernetes(kubernetesClient)
}
if notifyCh == nil {
var watchCtx context.Context
watchCtx, watchCtxCancel = context.WithCancel(ctx) //nolint:govet
notifyCh, notifyCloser, err = kubernetesRegistry.Watch(watchCtx, logger)
if err != nil {
return fmt.Errorf("error setting up registry watcher: %w", err) //nolint:govet
}
}
affiliateSpecs, err := kubernetesRegistry.List(nodename.TypedSpec().Nodename)
if err != nil {
return fmt.Errorf("error listing affiliates: %w", err)
}
touchedIDs := make(map[resource.ID]struct{})
for _, affilateSpec := range affiliateSpecs {
id := fmt.Sprintf("k8s/%s", affilateSpec.NodeID)
if err = safe.WriterModify(ctx, r, cluster.NewAffiliate(cluster.RawNamespaceName, id), func(res *cluster.Affiliate) error {
*res.TypedSpec() = *affilateSpec
return nil
}); err != nil {
return err
}
touchedIDs[id] = struct{}{}
}
if err := cleanupAffiliates(ctx, ctrl, r, touchedIDs); err != nil {
return err
}
r.ResetRestartBackoff()
}
}