mirror of
https://gitee.com/milvus-io/milvus.git
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441 lines
12 KiB
Go
441 lines
12 KiB
Go
// Copyright (C) 2019-2020 Zilliz. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
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// with the License. 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 distributed under the License
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// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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// or implied. See the License for the specific language governing permissions and limitations under the License.
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package grpcdatacoordclient
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import (
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"context"
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"fmt"
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"sync"
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"time"
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grpc_middleware "github.com/grpc-ecosystem/go-grpc-middleware"
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grpc_retry "github.com/grpc-ecosystem/go-grpc-middleware/retry"
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grpc_opentracing "github.com/grpc-ecosystem/go-grpc-middleware/tracing/opentracing"
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"github.com/milvus-io/milvus/internal/log"
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"github.com/milvus-io/milvus/internal/proto/milvuspb"
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"github.com/milvus-io/milvus/internal/util/retry"
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"github.com/milvus-io/milvus/internal/util/sessionutil"
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"github.com/milvus-io/milvus/internal/util/trace"
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"github.com/milvus-io/milvus/internal/util/typeutil"
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"go.uber.org/zap"
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"google.golang.org/grpc"
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"google.golang.org/grpc/codes"
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"github.com/milvus-io/milvus/internal/proto/commonpb"
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"github.com/milvus-io/milvus/internal/proto/datapb"
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"github.com/milvus-io/milvus/internal/proto/internalpb"
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)
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// Client is the datacoord grpc client
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type Client struct {
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ctx context.Context
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cancel context.CancelFunc
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grpcClient datapb.DataCoordClient
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conn *grpc.ClientConn
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grpcClientMtx sync.RWMutex
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sess *sessionutil.Session
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addr string
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getGrpcClient func() (datapb.DataCoordClient, error)
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}
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func (c *Client) setGetGrpcClientFunc() {
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c.getGrpcClient = c.getGrpcClientFunc
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}
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func (c *Client) getGrpcClientFunc() (datapb.DataCoordClient, error) {
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c.grpcClientMtx.RLock()
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if c.grpcClient != nil {
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defer c.grpcClientMtx.RUnlock()
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return c.grpcClient, nil
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}
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c.grpcClientMtx.RUnlock()
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c.grpcClientMtx.Lock()
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defer c.grpcClientMtx.Unlock()
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if c.grpcClient != nil {
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return c.grpcClient, nil
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}
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// FIXME(dragondriver): how to handle error here?
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// if we return nil here, then we should check if client is nil outside,
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err := c.connect(retry.Attempts(20))
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if err != nil {
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return nil, err
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}
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return c.grpcClient, nil
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}
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func (c *Client) resetConnection() {
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c.grpcClientMtx.Lock()
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defer c.grpcClientMtx.Unlock()
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if c.conn != nil {
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_ = c.conn.Close()
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}
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c.conn = nil
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c.grpcClient = nil
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}
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func getDataCoordAddress(sess *sessionutil.Session) (string, error) {
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key := typeutil.DataCoordRole
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msess, _, err := sess.GetSessions(key)
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if err != nil {
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log.Debug("DataCoordClient, getSessions failed", zap.Any("key", key), zap.Error(err))
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return "", err
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}
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ms, ok := msess[key]
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if !ok {
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log.Debug("DataCoordClient, not existed in msess ", zap.Any("key", key), zap.Any("len of msess", len(msess)))
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return "", fmt.Errorf("number of datacoord is incorrect, %d", len(msess))
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}
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return ms.Address, nil
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}
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// NewClient creates a new client instance
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func NewClient(ctx context.Context, metaRoot string, etcdEndpoints []string) (*Client, error) {
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sess := sessionutil.NewSession(ctx, metaRoot, etcdEndpoints)
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if sess == nil {
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err := fmt.Errorf("new session error, maybe can not connect to etcd")
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log.Debug("DataCoordClient NewClient failed", zap.Error(err))
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return nil, err
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}
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ctx, cancel := context.WithCancel(ctx)
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client := &Client{
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ctx: ctx,
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cancel: cancel,
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sess: sess,
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}
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client.setGetGrpcClientFunc()
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return client, nil
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}
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func (c *Client) Init() error {
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Params.Init()
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return nil
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}
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func (c *Client) connect(retryOptions ...retry.Option) error {
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var err error
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connectDataCoordFn := func() error {
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c.addr, err = getDataCoordAddress(c.sess)
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if err != nil {
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log.Debug("DataCoordClient getDataCoordAddr failed", zap.Error(err))
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return err
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}
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opts := trace.GetInterceptorOpts()
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log.Debug("DataCoordClient try reconnect ", zap.String("address", c.addr))
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ctx, cancel := context.WithTimeout(c.ctx, 15*time.Second)
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defer cancel()
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conn, err := grpc.DialContext(ctx, c.addr,
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grpc.WithInsecure(), grpc.WithBlock(),
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grpc.WithDefaultCallOptions(
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grpc.MaxCallRecvMsgSize(Params.ClientMaxRecvSize),
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grpc.MaxCallSendMsgSize(Params.ClientMaxSendSize)),
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grpc.WithUnaryInterceptor(
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grpc_middleware.ChainUnaryClient(
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grpc_retry.UnaryClientInterceptor(
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grpc_retry.WithMax(3),
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grpc_retry.WithCodes(codes.Aborted, codes.Unavailable),
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),
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grpc_opentracing.UnaryClientInterceptor(opts...),
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)),
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grpc.WithStreamInterceptor(
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grpc_middleware.ChainStreamClient(
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grpc_retry.StreamClientInterceptor(grpc_retry.WithMax(3),
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grpc_retry.WithCodes(codes.Aborted, codes.Unavailable),
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),
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grpc_opentracing.StreamClientInterceptor(opts...),
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)),
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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 c.conn != nil {
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_ = c.conn.Close()
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}
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c.conn = conn
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return nil
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}
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err = retry.Do(c.ctx, connectDataCoordFn, retryOptions...)
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if err != nil {
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log.Debug("DataCoord try reconnect failed", zap.Error(err))
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return err
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}
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c.grpcClient = datapb.NewDataCoordClient(c.conn)
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return nil
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}
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func (c *Client) recall(caller func() (interface{}, error)) (interface{}, error) {
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ret, err := caller()
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if err == nil {
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return ret, nil
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}
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log.Debug("DataCoord Client grpc error", zap.Error(err))
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c.resetConnection()
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ret, err = caller()
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if err == nil {
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return ret, nil
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}
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return ret, err
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}
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func (c *Client) Start() error {
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return nil
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}
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func (c *Client) Stop() error {
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c.cancel()
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c.grpcClientMtx.Lock()
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defer c.grpcClientMtx.Unlock()
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if c.conn != nil {
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return c.conn.Close()
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}
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return nil
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}
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// Register dumy
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func (c *Client) Register() error {
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return nil
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}
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func (c *Client) GetComponentStates(ctx context.Context) (*internalpb.ComponentStates, error) {
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ret, err := c.recall(func() (interface{}, error) {
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client, err := c.getGrpcClient()
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if err != nil {
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return nil, err
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}
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return client.GetComponentStates(ctx, &internalpb.GetComponentStatesRequest{})
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*internalpb.ComponentStates), err
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}
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func (c *Client) GetTimeTickChannel(ctx context.Context) (*milvuspb.StringResponse, error) {
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ret, err := c.recall(func() (interface{}, error) {
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client, err := c.getGrpcClient()
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if err != nil {
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return nil, err
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}
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return client.GetTimeTickChannel(ctx, &internalpb.GetTimeTickChannelRequest{})
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*milvuspb.StringResponse), err
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}
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func (c *Client) GetStatisticsChannel(ctx context.Context) (*milvuspb.StringResponse, error) {
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ret, err := c.recall(func() (interface{}, error) {
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client, err := c.getGrpcClient()
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if err != nil {
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return nil, err
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}
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return client.GetStatisticsChannel(ctx, &internalpb.GetStatisticsChannelRequest{})
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*milvuspb.StringResponse), err
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}
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func (c *Client) Flush(ctx context.Context, req *datapb.FlushRequest) (*datapb.FlushResponse, error) {
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ret, err := c.recall(func() (interface{}, error) {
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client, err := c.getGrpcClient()
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if err != nil {
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return nil, err
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}
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return client.Flush(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*datapb.FlushResponse), err
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}
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func (c *Client) AssignSegmentID(ctx context.Context, req *datapb.AssignSegmentIDRequest) (*datapb.AssignSegmentIDResponse, error) {
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ret, err := c.recall(func() (interface{}, error) {
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client, err := c.getGrpcClient()
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if err != nil {
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return nil, err
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}
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return client.AssignSegmentID(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*datapb.AssignSegmentIDResponse), err
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}
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func (c *Client) GetSegmentStates(ctx context.Context, req *datapb.GetSegmentStatesRequest) (*datapb.GetSegmentStatesResponse, error) {
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ret, err := c.recall(func() (interface{}, error) {
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client, err := c.getGrpcClient()
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if err != nil {
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return nil, err
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}
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return client.GetSegmentStates(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*datapb.GetSegmentStatesResponse), err
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}
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func (c *Client) GetInsertBinlogPaths(ctx context.Context, req *datapb.GetInsertBinlogPathsRequest) (*datapb.GetInsertBinlogPathsResponse, error) {
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ret, err := c.recall(func() (interface{}, error) {
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client, err := c.getGrpcClient()
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if err != nil {
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return nil, err
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}
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return client.GetInsertBinlogPaths(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*datapb.GetInsertBinlogPathsResponse), err
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}
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func (c *Client) GetCollectionStatistics(ctx context.Context, req *datapb.GetCollectionStatisticsRequest) (*datapb.GetCollectionStatisticsResponse, error) {
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ret, err := c.recall(func() (interface{}, error) {
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client, err := c.getGrpcClient()
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if err != nil {
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return nil, err
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}
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return client.GetCollectionStatistics(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*datapb.GetCollectionStatisticsResponse), err
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}
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func (c *Client) GetPartitionStatistics(ctx context.Context, req *datapb.GetPartitionStatisticsRequest) (*datapb.GetPartitionStatisticsResponse, error) {
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ret, err := c.recall(func() (interface{}, error) {
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client, err := c.getGrpcClient()
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if err != nil {
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return nil, err
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}
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return client.GetPartitionStatistics(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*datapb.GetPartitionStatisticsResponse), err
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}
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func (c *Client) GetSegmentInfoChannel(ctx context.Context) (*milvuspb.StringResponse, error) {
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ret, err := c.recall(func() (interface{}, error) {
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client, err := c.getGrpcClient()
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if err != nil {
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return nil, err
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}
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return client.GetSegmentInfoChannel(ctx, &datapb.GetSegmentInfoChannelRequest{})
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*milvuspb.StringResponse), err
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}
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func (c *Client) GetSegmentInfo(ctx context.Context, req *datapb.GetSegmentInfoRequest) (*datapb.GetSegmentInfoResponse, error) {
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ret, err := c.recall(func() (interface{}, error) {
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client, err := c.getGrpcClient()
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if err != nil {
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return nil, err
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}
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return client.GetSegmentInfo(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*datapb.GetSegmentInfoResponse), err
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}
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func (c *Client) SaveBinlogPaths(ctx context.Context, req *datapb.SaveBinlogPathsRequest) (*commonpb.Status, error) {
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// FIXME(dragondriver): why not to recall here?
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client, err := c.getGrpcClient()
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if err != nil {
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return &commonpb.Status{
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ErrorCode: commonpb.ErrorCode_UnexpectedError,
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Reason: err.Error(),
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}, nil
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}
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return client.SaveBinlogPaths(ctx, req)
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}
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func (c *Client) GetRecoveryInfo(ctx context.Context, req *datapb.GetRecoveryInfoRequest) (*datapb.GetRecoveryInfoResponse, error) {
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ret, err := c.recall(func() (interface{}, error) {
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client, err := c.getGrpcClient()
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if err != nil {
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return nil, err
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}
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return client.GetRecoveryInfo(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*datapb.GetRecoveryInfoResponse), err
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}
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func (c *Client) GetFlushedSegments(ctx context.Context, req *datapb.GetFlushedSegmentsRequest) (*datapb.GetFlushedSegmentsResponse, error) {
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ret, err := c.recall(func() (interface{}, error) {
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client, err := c.getGrpcClient()
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if err != nil {
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return nil, err
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}
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return client.GetFlushedSegments(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*datapb.GetFlushedSegmentsResponse), err
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}
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func (c *Client) GetMetrics(ctx context.Context, req *milvuspb.GetMetricsRequest) (*milvuspb.GetMetricsResponse, error) {
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ret, err := c.recall(func() (interface{}, error) {
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client, err := c.getGrpcClient()
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if err != nil {
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return nil, err
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}
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return client.GetMetrics(ctx, req)
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})
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if err != nil || ret == nil {
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return nil, err
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}
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return ret.(*milvuspb.GetMetricsResponse), err
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}
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