Merge pull request #6680 from linxiulei/fast_load

Optimize loading performance for cri recover

pkg/cri/server/restart.go

@@ -22,6 +22,7 @@ import (
 	"os"
 	"path/filepath"
 	goruntime "runtime"
+	"sync"
 	"time"
 
 	"github.com/containerd/containerd"
@@ -31,6 +32,7 @@ import (
 	"github.com/containerd/containerd/log"
 	"github.com/containerd/containerd/platforms"
 	"github.com/containerd/typeurl"
+	"golang.org/x/sync/errgroup"
 	runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
 
 	cio "github.com/containerd/containerd/pkg/cri/io"
@@ -56,19 +58,28 @@ func (c *criService) recover(ctx context.Context) error {
 	if err != nil {
 		return fmt.Errorf("failed to list sandbox containers: %w", err)
 	}
+
+	eg, ctx2 := errgroup.WithContext(ctx)
 	for _, sandbox := range sandboxes {
-		sb, err := c.loadSandbox(ctx, sandbox)
+		sandbox := sandbox
+		eg.Go(func() error {
+			sb, err := c.loadSandbox(ctx2, sandbox)
 			if err != nil {
-			log.G(ctx).WithError(err).Errorf("Failed to load sandbox %q", sandbox.ID())
+				log.G(ctx2).WithError(err).Errorf("Failed to load sandbox %q", sandbox.ID())
-			continue
+				return nil
 			}
-		log.G(ctx).Debugf("Loaded sandbox %+v", sb)
+			log.G(ctx2).Debugf("Loaded sandbox %+v", sb)
 			if err := c.sandboxStore.Add(sb); err != nil {
 				return fmt.Errorf("failed to add sandbox %q to store: %w", sandbox.ID(), err)
 			}
 			if err := c.sandboxNameIndex.Reserve(sb.Name, sb.ID); err != nil {
 				return fmt.Errorf("failed to reserve sandbox name %q: %w", sb.Name, err)
 			}
+			return nil
+		})
+	}
+	if err := eg.Wait(); err != nil {
+		return err
 	}
 
 	// Recover all containers.
@@ -76,19 +87,27 @@ func (c *criService) recover(ctx context.Context) error {
 	if err != nil {
 		return fmt.Errorf("failed to list containers: %w", err)
 	}
+	eg, ctx2 = errgroup.WithContext(ctx)
 	for _, container := range containers {
-		cntr, err := c.loadContainer(ctx, container)
+		container := container
+		eg.Go(func() error {
+			cntr, err := c.loadContainer(ctx2, container)
 			if err != nil {
-			log.G(ctx).WithError(err).Errorf("Failed to load container %q", container.ID())
+				log.G(ctx2).WithError(err).Errorf("Failed to load container %q", container.ID())
-			continue
+				return nil
 			}
-		log.G(ctx).Debugf("Loaded container %+v", cntr)
+			log.G(ctx2).Debugf("Loaded container %+v", cntr)
 			if err := c.containerStore.Add(cntr); err != nil {
 				return fmt.Errorf("failed to add container %q to store: %w", container.ID(), err)
 			}
 			if err := c.containerNameIndex.Reserve(cntr.Name, cntr.ID); err != nil {
 				return fmt.Errorf("failed to reserve container name %q: %w", cntr.Name, err)
 			}
+			return nil
+		})
+	}
+	if err := eg.Wait(); err != nil {
+		return err
 	}
 
 	// Recover all images.
@@ -427,21 +446,26 @@ func (c *criService) loadSandbox(ctx context.Context, cntr containerd.Container)
 // loadImages loads images from containerd.
 func (c *criService) loadImages(ctx context.Context, cImages []containerd.Image) {
 	snapshotter := c.config.ContainerdConfig.Snapshotter
+	var wg sync.WaitGroup
 	for _, i := range cImages {
+		wg.Add(1)
+		i := i
+		go func() {
+			defer wg.Done()
 			ok, _, _, _, err := containerdimages.Check(ctx, i.ContentStore(), i.Target(), platforms.Default())
 			if err != nil {
 				log.G(ctx).WithError(err).Errorf("Failed to check image content readiness for %q", i.Name())
-			continue
+				return
 			}
 			if !ok {
 				log.G(ctx).Warnf("The image content readiness for %q is not ok", i.Name())
-			continue
+				return
 			}
 			// Checking existence of top-level snapshot for each image being recovered.
 			unpacked, err := i.IsUnpacked(ctx, snapshotter)
 			if err != nil {
 				log.G(ctx).WithError(err).Warnf("Failed to check whether image is unpacked for image %s", i.Name())
-			continue
+				return
 			}
 			if !unpacked {
 				log.G(ctx).Warnf("The image %s is not unpacked.", i.Name())
@@ -449,10 +473,12 @@ func (c *criService) loadImages(ctx context.Context, cImages []containerd.Image)
 			}
 			if err := c.updateImage(ctx, i.Name()); err != nil {
 				log.G(ctx).WithError(err).Warnf("Failed to update reference for image %q", i.Name())
-			continue
+				return
 			}
 			log.G(ctx).Debugf("Loaded image %q", i.Name())
+		}()
 	}
+	wg.Wait()
 }
 
 func cleanupOrphanedIDDirs(ctx context.Context, cntrs []containerd.Container, base string) error {