Merge pull request #2341 from dmcgowan/move-client-content-snapshot
Move client implementations for content store and snapshotter
This commit is contained in:
Phil Estes
245
snapshots/proxy/proxy.go
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245
snapshots/proxy/proxy.go
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/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package proxy
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import (
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"context"
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"io"
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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/mount"
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"github.com/containerd/containerd/snapshots"
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protobuftypes "github.com/gogo/protobuf/types"
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)
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// NewSnapshotter returns a new Snapshotter which communicates over a GRPC
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// connection using the containerd snapshot GRPC API.
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func NewSnapshotter(client snapshotsapi.SnapshotsClient, snapshotterName string) snapshots.Snapshotter {
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return &proxySnapshotter{
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client: client,
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snapshotterName: snapshotterName,
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}
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}
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type proxySnapshotter struct {
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client snapshotsapi.SnapshotsClient
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snapshotterName string
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}
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func (p *proxySnapshotter) Stat(ctx context.Context, key string) (snapshots.Info, error) {
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resp, err := p.client.Stat(ctx,
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&snapshotsapi.StatSnapshotRequest{
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Snapshotter: p.snapshotterName,
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Key: key,
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})
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if err != nil {
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return snapshots.Info{}, errdefs.FromGRPC(err)
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}
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return toInfo(resp.Info), nil
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}
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func (p *proxySnapshotter) Update(ctx context.Context, info snapshots.Info, fieldpaths ...string) (snapshots.Info, error) {
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resp, err := p.client.Update(ctx,
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&snapshotsapi.UpdateSnapshotRequest{
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Snapshotter: p.snapshotterName,
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Info: fromInfo(info),
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UpdateMask: &protobuftypes.FieldMask{
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Paths: fieldpaths,
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},
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})
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if err != nil {
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return snapshots.Info{}, errdefs.FromGRPC(err)
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}
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return toInfo(resp.Info), nil
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}
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func (p *proxySnapshotter) Usage(ctx context.Context, key string) (snapshots.Usage, error) {
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resp, err := p.client.Usage(ctx, &snapshotsapi.UsageRequest{
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Snapshotter: p.snapshotterName,
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Key: key,
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})
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if err != nil {
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return snapshots.Usage{}, errdefs.FromGRPC(err)
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}
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return toUsage(resp), nil
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}
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func (p *proxySnapshotter) Mounts(ctx context.Context, key string) ([]mount.Mount, error) {
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resp, err := p.client.Mounts(ctx, &snapshotsapi.MountsRequest{
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Snapshotter: p.snapshotterName,
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Key: key,
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})
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if err != nil {
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return nil, errdefs.FromGRPC(err)
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}
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return toMounts(resp.Mounts), nil
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}
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func (p *proxySnapshotter) Prepare(ctx context.Context, key, parent string, opts ...snapshots.Opt) ([]mount.Mount, error) {
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var local snapshots.Info
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for _, opt := range opts {
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if err := opt(&local); err != nil {
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return nil, err
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}
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}
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resp, err := p.client.Prepare(ctx, &snapshotsapi.PrepareSnapshotRequest{
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Snapshotter: p.snapshotterName,
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Key: key,
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Parent: parent,
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Labels: local.Labels,
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})
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if err != nil {
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return nil, errdefs.FromGRPC(err)
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}
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return toMounts(resp.Mounts), nil
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}
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func (p *proxySnapshotter) View(ctx context.Context, key, parent string, opts ...snapshots.Opt) ([]mount.Mount, error) {
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var local snapshots.Info
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for _, opt := range opts {
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if err := opt(&local); err != nil {
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return nil, err
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}
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}
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resp, err := p.client.View(ctx, &snapshotsapi.ViewSnapshotRequest{
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Snapshotter: p.snapshotterName,
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Key: key,
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Parent: parent,
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Labels: local.Labels,
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})
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if err != nil {
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return nil, errdefs.FromGRPC(err)
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}
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return toMounts(resp.Mounts), nil
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}
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func (p *proxySnapshotter) Commit(ctx context.Context, name, key string, opts ...snapshots.Opt) error {
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var local snapshots.Info
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for _, opt := range opts {
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if err := opt(&local); err != nil {
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return err
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}
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}
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_, err := p.client.Commit(ctx, &snapshotsapi.CommitSnapshotRequest{
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Snapshotter: p.snapshotterName,
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Name: name,
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Key: key,
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Labels: local.Labels,
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})
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return errdefs.FromGRPC(err)
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}
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func (p *proxySnapshotter) Remove(ctx context.Context, key string) error {
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_, err := p.client.Remove(ctx, &snapshotsapi.RemoveSnapshotRequest{
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Snapshotter: p.snapshotterName,
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Key: key,
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})
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return errdefs.FromGRPC(err)
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}
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func (p *proxySnapshotter) Walk(ctx context.Context, fn func(context.Context, snapshots.Info) error) error {
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sc, err := p.client.List(ctx, &snapshotsapi.ListSnapshotsRequest{
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Snapshotter: p.snapshotterName,
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})
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if err != nil {
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return errdefs.FromGRPC(err)
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}
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for {
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resp, err := sc.Recv()
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if err != nil {
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if err == io.EOF {
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return nil
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}
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return errdefs.FromGRPC(err)
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}
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if resp == nil {
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return nil
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}
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for _, info := range resp.Info {
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if err := fn(ctx, toInfo(info)); err != nil {
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return err
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}
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}
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}
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}
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func (p *proxySnapshotter) Close() error {
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return nil
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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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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 toUsage(resp *snapshotsapi.UsageResponse) snapshots.Usage {
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return snapshots.Usage{
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Inodes: resp.Inodes,
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Size: resp.Size_,
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}
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}
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func toMounts(mm []*types.Mount) []mount.Mount {
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mounts := make([]mount.Mount, len(mm))
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for i, m := range mm {
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mounts[i] = mount.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 mounts
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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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