132 lines
3.1 KiB
Go
132 lines
3.1 KiB
Go
/*
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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 leases
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import (
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"crypto/rand"
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"encoding/base64"
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"fmt"
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"time"
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"google.golang.org/grpc"
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"github.com/boltdb/bolt"
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api "github.com/containerd/containerd/api/services/leases/v1"
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"github.com/containerd/containerd/metadata"
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"github.com/containerd/containerd/plugin"
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ptypes "github.com/gogo/protobuf/types"
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"golang.org/x/net/context"
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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: "leases",
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Requires: []plugin.Type{
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plugin.MetadataPlugin,
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},
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InitFn: func(ic *plugin.InitContext) (interface{}, error) {
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m, 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 NewService(m.(*metadata.DB)), nil
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},
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})
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}
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type service struct {
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db *metadata.DB
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}
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// NewService returns the GRPC metadata server
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func NewService(db *metadata.DB) api.LeasesServer {
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return &service{
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db: db,
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}
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}
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func (s *service) Register(server *grpc.Server) error {
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api.RegisterLeasesServer(server, s)
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return nil
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}
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func (s *service) Create(ctx context.Context, r *api.CreateRequest) (*api.CreateResponse, error) {
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lid := r.ID
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if lid == "" {
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lid = generateLeaseID()
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}
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var trans metadata.Lease
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if err := s.db.Update(func(tx *bolt.Tx) error {
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var err error
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trans, err = metadata.NewLeaseManager(tx).Create(ctx, lid, r.Labels)
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return err
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}); err != nil {
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return nil, err
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}
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return &api.CreateResponse{
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Lease: txToGRPC(trans),
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}, nil
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}
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func (s *service) Delete(ctx context.Context, r *api.DeleteRequest) (*ptypes.Empty, error) {
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if err := s.db.Update(func(tx *bolt.Tx) error {
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return metadata.NewLeaseManager(tx).Delete(ctx, r.ID)
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}); err != nil {
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return nil, err
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}
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return &ptypes.Empty{}, nil
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}
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func (s *service) List(ctx context.Context, r *api.ListRequest) (*api.ListResponse, error) {
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var leases []metadata.Lease
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if err := s.db.View(func(tx *bolt.Tx) error {
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var err error
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leases, err = metadata.NewLeaseManager(tx).List(ctx, false, r.Filters...)
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return err
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}); err != nil {
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return nil, err
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}
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apileases := make([]*api.Lease, len(leases))
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for i := range leases {
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apileases[i] = txToGRPC(leases[i])
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}
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return &api.ListResponse{
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Leases: apileases,
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}, nil
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}
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func txToGRPC(tx metadata.Lease) *api.Lease {
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return &api.Lease{
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ID: tx.ID,
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Labels: tx.Labels,
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CreatedAt: tx.CreatedAt,
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// TODO: Snapshots
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// TODO: Content
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}
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}
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func generateLeaseID() string {
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t := time.Now()
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var b [3]byte
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// Ignore read failures, just decreases uniqueness
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rand.Read(b[:])
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return fmt.Sprintf("%d-%s", t.Nanosecond(), base64.URLEncoding.EncodeToString(b[:]))
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}
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