c8d: Prometheus metrics

daemon/containerd/image_delete.go

@@ -55,7 +55,14 @@ import (
 // conflict will not be reported.
 //
 // TODO(thaJeztah): image delete should send prometheus counters; see https://github.com/moby/moby/issues/45268
-func (i *ImageService) ImageDelete(ctx context.Context, imageRef string, force, prune bool) ([]imagetypes.DeleteResponse, error) {
+func (i *ImageService) ImageDelete(ctx context.Context, imageRef string, force, prune bool) (response []imagetypes.DeleteResponse, retErr error) {
+	start := time.Now()
+	defer func() {
+		if retErr == nil {
+			dimages.ImageActions.WithValues("delete").UpdateSince(start)
+		}
+	}()
+
 	var c conflictType
 	if !force {
 		c |= conflictSoft

daemon/containerd/image_history.go

@@ -2,12 +2,14 @@ package containerd
 
 import (
 	"context"
+	"time"
 
 	containerdimages "github.com/containerd/containerd/images"
 	"github.com/containerd/containerd/platforms"
 	"github.com/containerd/log"
 	"github.com/distribution/reference"
 	imagetype "github.com/docker/docker/api/types/image"
+	dimages "github.com/docker/docker/daemon/images"
 	"github.com/opencontainers/go-digest"
 	"github.com/opencontainers/image-spec/identity"
 	"github.com/pkg/errors"
@@ -16,6 +18,7 @@ import (
 // ImageHistory returns a slice of HistoryResponseItem structures for the
 // specified image name by walking the image lineage.
 func (i *ImageService) ImageHistory(ctx context.Context, name string) ([]*imagetype.HistoryResponseItem, error) {
+	start := time.Now()
 	img, err := i.resolveImage(ctx, name)
 	if err != nil {
 		return nil, err
@@ -113,6 +116,7 @@ func (i *ImageService) ImageHistory(ctx context.Context, name string) ([]*imaget
 		}
 	}
 
+	dimages.ImageActions.WithValues("history").UpdateSince(start)
 	return history, nil
 }
 

daemon/containerd/image_pull.go

@@ -6,6 +6,7 @@ import (
 	"io"
 	"os"
 	"strings"
+	"time"
 
 	"github.com/containerd/containerd"
 	cerrdefs "github.com/containerd/containerd/errdefs"
@@ -17,6 +18,7 @@ import (
 	"github.com/distribution/reference"
 	"github.com/docker/docker/api/types/events"
 	registrytypes "github.com/docker/docker/api/types/registry"
+	dimages "github.com/docker/docker/daemon/images"
 	"github.com/docker/docker/distribution"
 	"github.com/docker/docker/errdefs"
 	"github.com/docker/docker/internal/compatcontext"
@@ -29,7 +31,13 @@ import (
 
 // PullImage initiates a pull operation. baseRef is the image to pull.
 // If reference is not tagged, all tags are pulled.
-func (i *ImageService) PullImage(ctx context.Context, baseRef reference.Named, platform *ocispec.Platform, metaHeaders map[string][]string, authConfig *registrytypes.AuthConfig, outStream io.Writer) error {
+func (i *ImageService) PullImage(ctx context.Context, baseRef reference.Named, platform *ocispec.Platform, metaHeaders map[string][]string, authConfig *registrytypes.AuthConfig, outStream io.Writer) (retErr error) {
+	start := time.Now()
+	defer func() {
+		if retErr == nil {
+			dimages.ImageActions.WithValues("pull").UpdateSince(start)
+		}
+	}()
 	out := streamformatter.NewJSONProgressOutput(outStream, false)
 
 	if !reference.IsNameOnly(baseRef) {

daemon/containerd/image_push.go

@@ -6,6 +6,7 @@ import (
 	"io"
 	"strings"
 	"sync"
+	"time"
 
 	"github.com/containerd/containerd/content"
 	cerrdefs "github.com/containerd/containerd/errdefs"
@@ -19,6 +20,7 @@ import (
 	"github.com/distribution/reference"
 	"github.com/docker/docker/api/types/events"
 	"github.com/docker/docker/api/types/registry"
+	dimages "github.com/docker/docker/daemon/images"
 	"github.com/docker/docker/errdefs"
 	"github.com/docker/docker/internal/compatcontext"
 	"github.com/docker/docker/pkg/progress"
@@ -40,6 +42,12 @@ import (
 // to perform cross-repo mounts of the shared content when pushing to a different
 // repository on the same registry.
 func (i *ImageService) PushImage(ctx context.Context, sourceRef reference.Named, metaHeaders map[string][]string, authConfig *registry.AuthConfig, outStream io.Writer) (retErr error) {
+	start := time.Now()
+	defer func() {
+		if retErr == nil {
+			dimages.ImageActions.WithValues("push").UpdateSince(start)
+		}
+	}()
 	out := streamformatter.NewJSONProgressOutput(outStream, false)
 	progress.Messagef(out, "", "The push refers to repository [%s]", sourceRef.Name())
 

daemon/images/image_delete.go

@@ -173,7 +173,7 @@ func (i *ImageService) ImageDelete(ctx context.Context, imageRef string, force,
 		return nil, err
 	}
 
-	imageActions.WithValues("delete").UpdateSince(start)
+	ImageActions.WithValues("delete").UpdateSince(start)
 
 	return records, nil
 }

daemon/images/image_history.go

@@ -76,6 +76,6 @@ func (i *ImageService) ImageHistory(ctx context.Context, name string) ([]*image.
 			break
 		}
 	}
-	imageActions.WithValues("history").UpdateSince(start)
+	ImageActions.WithValues("history").UpdateSince(start)
 	return history, nil
 }

daemon/images/image_pull.go

@@ -26,7 +26,7 @@ func (i *ImageService) PullImage(ctx context.Context, ref reference.Named, platf
 	start := time.Now()
 
 	err := i.pullImageWithReference(ctx, ref, platform, metaHeaders, authConfig, outStream)
-	imageActions.WithValues("pull").UpdateSince(start)
+	ImageActions.WithValues("pull").UpdateSince(start)
 	if err != nil {
 		return err
 	}

daemon/images/image_push.go

@@ -48,6 +48,6 @@ func (i *ImageService) PushImage(ctx context.Context, ref reference.Named, metaH
 	err := distribution.Push(ctx, ref, imagePushConfig)
 	close(progressChan)
 	<-writesDone
-	imageActions.WithValues("push").UpdateSince(start)
+	ImageActions.WithValues("push").UpdateSince(start)
 	return err
 }

daemon/images/locals.go → daemon/images/metrics.go

@@ -4,11 +4,14 @@ import (
 	metrics "github.com/docker/go-metrics"
 )
 
-var imageActions metrics.LabeledTimer
+// ImagesActions measures the time it takes to process some image actions.
+// Exported for use in the containerd-backed image store and it is not intended
+// for external consumption. Do not use!
+var ImageActions metrics.LabeledTimer
 
 func init() {
 	ns := metrics.NewNamespace("engine", "daemon", nil)
-	imageActions = ns.NewLabeledTimer("image_actions", "The number of seconds it takes to process each image action", "action")
+	ImageActions = ns.NewLabeledTimer("image_actions", "The number of seconds it takes to process each image action", "action")
 	// TODO: is it OK to register a namespace with the same name? Or does this
 	// need to be exported from somewhere?
 	metrics.Register(ns)