mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
110 lines
3.0 KiB
Go
110 lines
3.0 KiB
Go
// Copyright 2016 CoreOS, Inc.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package v3rpc
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import (
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"io"
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"github.com/coreos/etcd/etcdserver"
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pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
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"github.com/coreos/etcd/storage/backend"
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"github.com/coreos/etcd/version"
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"golang.org/x/net/context"
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)
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type BackendGetter interface {
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Backend() backend.Backend
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}
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type Alarmer interface {
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Alarm(ctx context.Context, ar *pb.AlarmRequest) (*pb.AlarmResponse, error)
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}
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type maintenanceServer struct {
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bg BackendGetter
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a Alarmer
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hdr header
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}
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func NewMaintenanceServer(s *etcdserver.EtcdServer) pb.MaintenanceServer {
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return &maintenanceServer{bg: s, a: s, hdr: newHeader(s)}
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}
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func (ms *maintenanceServer) Defragment(ctx context.Context, sr *pb.DefragmentRequest) (*pb.DefragmentResponse, error) {
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plog.Noticef("starting to defragment the storage backend...")
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err := ms.bg.Backend().Defrag()
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if err != nil {
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plog.Errorf("failed to deframent the storage backend (%v)", err)
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return nil, err
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}
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plog.Noticef("finished defragmenting the storage backend")
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return &pb.DefragmentResponse{}, nil
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}
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func (ms *maintenanceServer) Snapshot(sr *pb.SnapshotRequest, srv pb.Maintenance_SnapshotServer) error {
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snap := ms.bg.Backend().Snapshot()
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pr, pw := io.Pipe()
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defer pr.Close()
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go func() {
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snap.WriteTo(pw)
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if err := snap.Close(); err != nil {
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plog.Errorf("error closing snapshot (%v)", err)
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}
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pw.Close()
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}()
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br := int64(0)
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buf := make([]byte, 32*1024)
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sz := snap.Size()
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for br < sz {
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n, err := io.ReadFull(pr, buf)
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if err != nil && err != io.EOF && err != io.ErrUnexpectedEOF {
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return togRPCError(err)
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}
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br += int64(n)
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resp := &pb.SnapshotResponse{
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RemainingBytes: uint64(sz - br),
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Blob: buf[:n],
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}
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if err = srv.Send(resp); err != nil {
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return togRPCError(err)
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}
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}
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return nil
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}
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func (ms *maintenanceServer) Hash(ctx context.Context, r *pb.HashRequest) (*pb.HashResponse, error) {
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h, err := ms.bg.Backend().Hash()
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if err != nil {
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return nil, togRPCError(err)
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}
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resp := &pb.HashResponse{Header: &pb.ResponseHeader{Revision: ms.hdr.rev()}, Hash: h}
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ms.hdr.fill(resp.Header)
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return resp, nil
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}
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func (ms *maintenanceServer) Alarm(ctx context.Context, ar *pb.AlarmRequest) (*pb.AlarmResponse, error) {
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return ms.a.Alarm(ctx, ar)
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}
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func (ms *maintenanceServer) Status(ctx context.Context, ar *pb.StatusRequest) (*pb.StatusResponse, error) {
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resp := &pb.StatusResponse{Header: &pb.ResponseHeader{Revision: ms.hdr.rev()}, Version: version.Version}
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ms.hdr.fill(resp.Header)
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return resp, nil
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}
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