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push.go
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push.go
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/*
Copyright The containerd Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// Package push derived from https://github.com/containerd/containerd/blob/v1.4.3/cmd/ctr/commands/images/push.go
package push
import (
"context"
"fmt"
"io"
"sync"
"text/tabwriter"
"time"
"github.com/containerd/containerd"
"github.com/containerd/containerd/images"
"github.com/containerd/containerd/pkg/progress"
"github.com/containerd/containerd/platforms"
"github.com/containerd/containerd/remotes"
"github.com/containerd/containerd/remotes/docker"
"github.com/containerd/log"
"github.com/containerd/nerdctl/pkg/imgutil/jobs"
ocispec "github.com/opencontainers/image-spec/specs-go/v1"
"golang.org/x/sync/errgroup"
)
// Push pushes an image to a remote registry.
func Push(ctx context.Context, client *containerd.Client, resolver remotes.Resolver, pushTracker docker.StatusTracker, stdout io.Writer,
localRef, remoteRef string, platform platforms.MatchComparer, allowNonDist, quiet bool) error {
img, err := client.ImageService().Get(ctx, localRef)
if err != nil {
return fmt.Errorf("unable to resolve image to manifest: %w", err)
}
desc := img.Target
ongoing := newPushJobs(pushTracker)
eg, ctx := errgroup.WithContext(ctx)
// used to notify the progress writer
doneCh := make(chan struct{})
eg.Go(func() error {
defer close(doneCh)
log.G(ctx).WithField("image", remoteRef).WithField("digest", desc.Digest).Debug("pushing")
jobHandler := images.HandlerFunc(func(ctx context.Context, desc ocispec.Descriptor) ([]ocispec.Descriptor, error) {
if allowNonDist || !images.IsNonDistributable(desc.MediaType) {
ongoing.add(remotes.MakeRefKey(ctx, desc))
}
return nil, nil
})
if !allowNonDist {
jobHandler = remotes.SkipNonDistributableBlobs(jobHandler)
}
return client.Push(ctx, remoteRef, desc,
containerd.WithResolver(resolver),
containerd.WithImageHandler(jobHandler),
containerd.WithPlatformMatcher(platform),
)
})
if !quiet {
eg.Go(func() error {
var (
ticker = time.NewTicker(100 * time.Millisecond)
fw = progress.NewWriter(stdout)
start = time.Now()
done bool
)
defer ticker.Stop()
for {
select {
case <-ticker.C:
fw.Flush()
tw := tabwriter.NewWriter(fw, 1, 8, 1, ' ', 0)
jobs.Display(tw, ongoing.status(), start)
tw.Flush()
if done {
fw.Flush()
return nil
}
case <-doneCh:
done = true
case <-ctx.Done():
done = true // allow ui to update once more
}
}
})
}
return eg.Wait()
}
type pushjobs struct {
jobs map[string]struct{}
ordered []string
tracker docker.StatusTracker
mu sync.Mutex
}
func newPushJobs(tracker docker.StatusTracker) *pushjobs {
return &pushjobs{
jobs: make(map[string]struct{}),
tracker: tracker,
}
}
func (j *pushjobs) add(ref string) {
j.mu.Lock()
defer j.mu.Unlock()
if _, ok := j.jobs[ref]; ok {
return
}
j.ordered = append(j.ordered, ref)
j.jobs[ref] = struct{}{}
}
func (j *pushjobs) status() []jobs.StatusInfo {
j.mu.Lock()
defer j.mu.Unlock()
statuses := make([]jobs.StatusInfo, 0, len(j.jobs))
for _, name := range j.ordered {
si := jobs.StatusInfo{
Ref: name,
}
status, err := j.tracker.GetStatus(name)
if err != nil {
si.Status = "waiting"
} else {
si.Offset = status.Offset
si.Total = status.Total
si.StartedAt = status.StartedAt
si.UpdatedAt = status.UpdatedAt
if status.Offset >= status.Total {
if status.UploadUUID == "" {
si.Status = "done"
} else {
si.Status = "committing"
}
} else {
si.Status = "uploading"
}
}
statuses = append(statuses, si)
}
return statuses
}