rename snapshot->snapshots proto pkg and service
Signed-off-by: Jess Valarezo <valarezo.jessica@gmail.com>
This commit is contained in:
Jess Valarezo
316
services/snapshots/service.go
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316
services/snapshots/service.go
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@@ -0,0 +1,316 @@
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package snapshots
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import (
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gocontext "context"
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eventstypes "github.com/containerd/containerd/api/events"
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snapshotsapi "github.com/containerd/containerd/api/services/snapshots/v1"
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"github.com/containerd/containerd/api/types"
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"github.com/containerd/containerd/errdefs"
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"github.com/containerd/containerd/events"
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"github.com/containerd/containerd/log"
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"github.com/containerd/containerd/metadata"
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"github.com/containerd/containerd/mount"
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"github.com/containerd/containerd/plugin"
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"github.com/containerd/containerd/snapshots"
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ptypes "github.com/gogo/protobuf/types"
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"golang.org/x/net/context"
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"google.golang.org/grpc"
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)
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func init() {
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plugin.Register(&plugin.Registration{
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Type: plugin.GRPCPlugin,
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ID: "snapshots",
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Requires: []plugin.Type{
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plugin.MetadataPlugin,
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},
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InitFn: newService,
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})
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}
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var empty = &ptypes.Empty{}
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type service struct {
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db *metadata.DB
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publisher events.Publisher
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}
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func newService(ic *plugin.InitContext) (interface{}, error) {
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md, err := ic.Get(plugin.MetadataPlugin)
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if err != nil {
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return nil, err
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}
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return &service{
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db: md.(*metadata.DB),
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publisher: ic.Events,
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}, nil
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}
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func (s *service) getSnapshotter(name string) (snapshots.Snapshotter, error) {
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if name == "" {
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return nil, errdefs.ToGRPCf(errdefs.ErrInvalidArgument, "snapshotter argument missing")
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}
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sn := s.db.Snapshotter(name)
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if sn == nil {
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return nil, errdefs.ToGRPCf(errdefs.ErrInvalidArgument, "snapshotter not loaded: %s", name)
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}
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return sn, nil
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}
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func (s *service) Register(gs *grpc.Server) error {
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snapshotsapi.RegisterSnapshotsServer(gs, s)
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return nil
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}
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func (s *service) Prepare(ctx context.Context, pr *snapshotsapi.PrepareSnapshotRequest) (*snapshotsapi.PrepareSnapshotResponse, error) {
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log.G(ctx).WithField("parent", pr.Parent).WithField("key", pr.Key).Debugf("Preparing snapshot")
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sn, err := s.getSnapshotter(pr.Snapshotter)
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if err != nil {
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return nil, err
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}
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var opts []snapshots.Opt
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if pr.Labels != nil {
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opts = append(opts, snapshots.WithLabels(pr.Labels))
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}
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mounts, err := sn.Prepare(ctx, pr.Key, pr.Parent, opts...)
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if err != nil {
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return nil, errdefs.ToGRPC(err)
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}
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if err := s.publisher.Publish(ctx, "/snapshot/prepare", &eventstypes.SnapshotPrepare{
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Key: pr.Key,
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Parent: pr.Parent,
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}); err != nil {
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return nil, err
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}
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return &snapshotsapi.PrepareSnapshotResponse{
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Mounts: fromMounts(mounts),
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}, nil
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}
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func (s *service) View(ctx context.Context, pr *snapshotsapi.ViewSnapshotRequest) (*snapshotsapi.ViewSnapshotResponse, error) {
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log.G(ctx).WithField("parent", pr.Parent).WithField("key", pr.Key).Debugf("Preparing view snapshot")
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sn, err := s.getSnapshotter(pr.Snapshotter)
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if err != nil {
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return nil, err
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}
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var opts []snapshots.Opt
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if pr.Labels != nil {
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opts = append(opts, snapshots.WithLabels(pr.Labels))
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}
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mounts, err := sn.View(ctx, pr.Key, pr.Parent, opts...)
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if err != nil {
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return nil, errdefs.ToGRPC(err)
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}
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return &snapshotsapi.ViewSnapshotResponse{
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Mounts: fromMounts(mounts),
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}, nil
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}
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func (s *service) Mounts(ctx context.Context, mr *snapshotsapi.MountsRequest) (*snapshotsapi.MountsResponse, error) {
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log.G(ctx).WithField("key", mr.Key).Debugf("Getting snapshot mounts")
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sn, err := s.getSnapshotter(mr.Snapshotter)
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if err != nil {
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return nil, err
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}
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mounts, err := sn.Mounts(ctx, mr.Key)
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if err != nil {
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return nil, errdefs.ToGRPC(err)
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}
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return &snapshotsapi.MountsResponse{
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Mounts: fromMounts(mounts),
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}, nil
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}
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func (s *service) Commit(ctx context.Context, cr *snapshotsapi.CommitSnapshotRequest) (*ptypes.Empty, error) {
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log.G(ctx).WithField("key", cr.Key).WithField("name", cr.Name).Debugf("Committing snapshot")
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sn, err := s.getSnapshotter(cr.Snapshotter)
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if err != nil {
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return nil, err
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}
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var opts []snapshots.Opt
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if cr.Labels != nil {
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opts = append(opts, snapshots.WithLabels(cr.Labels))
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}
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if err := sn.Commit(ctx, cr.Name, cr.Key, opts...); err != nil {
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return nil, errdefs.ToGRPC(err)
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}
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if err := s.publisher.Publish(ctx, "/snapshot/commit", &eventstypes.SnapshotCommit{
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Key: cr.Key,
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Name: cr.Name,
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}); err != nil {
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return nil, err
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}
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return empty, nil
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}
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func (s *service) Remove(ctx context.Context, rr *snapshotsapi.RemoveSnapshotRequest) (*ptypes.Empty, error) {
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log.G(ctx).WithField("key", rr.Key).Debugf("Removing snapshot")
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sn, err := s.getSnapshotter(rr.Snapshotter)
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if err != nil {
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return nil, err
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}
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if err := sn.Remove(ctx, rr.Key); err != nil {
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return nil, errdefs.ToGRPC(err)
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}
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if err := s.publisher.Publish(ctx, "/snapshot/remove", &eventstypes.SnapshotRemove{
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Key: rr.Key,
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}); err != nil {
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return nil, err
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}
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return empty, nil
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}
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func (s *service) Stat(ctx context.Context, sr *snapshotsapi.StatSnapshotRequest) (*snapshotsapi.StatSnapshotResponse, error) {
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log.G(ctx).WithField("key", sr.Key).Debugf("Statting snapshot")
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sn, err := s.getSnapshotter(sr.Snapshotter)
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if err != nil {
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return nil, err
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}
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info, err := sn.Stat(ctx, sr.Key)
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if err != nil {
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return nil, errdefs.ToGRPC(err)
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}
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return &snapshotsapi.StatSnapshotResponse{Info: fromInfo(info)}, nil
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}
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func (s *service) Update(ctx context.Context, sr *snapshotsapi.UpdateSnapshotRequest) (*snapshotsapi.UpdateSnapshotResponse, error) {
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log.G(ctx).WithField("key", sr.Info.Name).Debugf("Updating snapshot")
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sn, err := s.getSnapshotter(sr.Snapshotter)
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if err != nil {
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return nil, err
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}
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info, err := sn.Update(ctx, toInfo(sr.Info), sr.UpdateMask.GetPaths()...)
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if err != nil {
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return nil, errdefs.ToGRPC(err)
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}
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return &snapshotsapi.UpdateSnapshotResponse{Info: fromInfo(info)}, nil
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}
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func (s *service) List(sr *snapshotsapi.ListSnapshotsRequest, ss snapshotsapi.Snapshots_ListServer) error {
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sn, err := s.getSnapshotter(sr.Snapshotter)
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if err != nil {
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return err
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}
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var (
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buffer []snapshotsapi.Info
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sendBlock = func(block []snapshotsapi.Info) error {
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return ss.Send(&snapshotsapi.ListSnapshotsResponse{
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Info: block,
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})
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}
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)
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err = sn.Walk(ss.Context(), func(ctx gocontext.Context, info snapshots.Info) error {
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buffer = append(buffer, fromInfo(info))
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if len(buffer) >= 100 {
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if err := sendBlock(buffer); err != nil {
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return err
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}
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buffer = buffer[:0]
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}
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return nil
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})
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if err != nil {
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return err
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}
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if len(buffer) > 0 {
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// Send remaining infos
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if err := sendBlock(buffer); err != nil {
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return err
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}
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}
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return nil
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}
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func (s *service) Usage(ctx context.Context, ur *snapshotsapi.UsageRequest) (*snapshotsapi.UsageResponse, error) {
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sn, err := s.getSnapshotter(ur.Snapshotter)
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if err != nil {
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return nil, err
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}
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usage, err := sn.Usage(ctx, ur.Key)
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if err != nil {
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return nil, errdefs.ToGRPC(err)
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}
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return fromUsage(usage), nil
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}
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func fromKind(kind snapshots.Kind) snapshotsapi.Kind {
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if kind == snapshots.KindActive {
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return snapshotsapi.KindActive
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}
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if kind == snapshots.KindView {
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return snapshotsapi.KindView
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}
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return snapshotsapi.KindCommitted
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}
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func fromInfo(info snapshots.Info) snapshotsapi.Info {
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return snapshotsapi.Info{
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Name: info.Name,
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Parent: info.Parent,
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Kind: fromKind(info.Kind),
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CreatedAt: info.Created,
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UpdatedAt: info.Updated,
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Labels: info.Labels,
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}
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}
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func fromUsage(usage snapshots.Usage) *snapshotsapi.UsageResponse {
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return &snapshotsapi.UsageResponse{
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Inodes: usage.Inodes,
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Size_: usage.Size,
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}
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}
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func fromMounts(mounts []mount.Mount) []*types.Mount {
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out := make([]*types.Mount, len(mounts))
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for i, m := range mounts {
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out[i] = &types.Mount{
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Type: m.Type,
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Source: m.Source,
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Options: m.Options,
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}
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}
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return out
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}
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func toInfo(info snapshotsapi.Info) snapshots.Info {
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return snapshots.Info{
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Name: info.Name,
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Parent: info.Parent,
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Kind: toKind(info.Kind),
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Created: info.CreatedAt,
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Updated: info.UpdatedAt,
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Labels: info.Labels,
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}
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}
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func toKind(kind snapshotsapi.Kind) snapshots.Kind {
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if kind == snapshotsapi.KindActive {
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return snapshots.KindActive
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}
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if kind == snapshotsapi.KindView {
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return snapshots.KindView
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}
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return snapshots.KindCommitted
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}
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