mirror of
https://gitee.com/milvus-io/milvus.git
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408 lines
13 KiB
Go
408 lines
13 KiB
Go
// Licensed to the LF AI & Data foundation under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "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
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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 etcdkv
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import (
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"context"
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"fmt"
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"path"
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"time"
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"github.com/milvus-io/milvus/internal/log"
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clientv3 "go.etcd.io/etcd/client/v3"
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"go.uber.org/zap"
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)
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const (
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RequestTimeout = 10 * time.Second
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)
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// EtcdKV implments TxnKv interface, it support to process multiple kvs in a transactions
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type EtcdKV struct {
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client *clientv3.Client
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rootPath string
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}
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// NewEtcdKV creates a new etcd kv.
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func NewEtcdKV(etcdEndpoints []string, rootPath string) (*EtcdKV, error) {
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client, err := clientv3.New(clientv3.Config{
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Endpoints: etcdEndpoints,
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DialTimeout: 5 * time.Second,
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})
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if err != nil {
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return nil, err
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}
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kv := &EtcdKV{
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client: client,
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rootPath: rootPath,
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}
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return kv, nil
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}
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func NewEtcdKVWithClient(cli *clientv3.Client, rootPath string) *EtcdKV {
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return &EtcdKV{
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client: cli,
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rootPath: rootPath,
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}
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}
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func (kv *EtcdKV) Close() {
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kv.client.Close()
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}
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func (kv *EtcdKV) GetPath(key string) string {
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return path.Join(kv.rootPath, key)
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}
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func (kv *EtcdKV) LoadWithPrefix(key string) ([]string, []string, error) {
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start := time.Now()
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key = path.Join(kv.rootPath, key)
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ctx, cancel := context.WithTimeout(context.TODO(), RequestTimeout)
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defer cancel()
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resp, err := kv.client.Get(ctx, key, clientv3.WithPrefix(),
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clientv3.WithSort(clientv3.SortByKey, clientv3.SortAscend))
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if err != nil {
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return nil, nil, err
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}
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keys := make([]string, 0, resp.Count)
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values := make([]string, 0, resp.Count)
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for _, kv := range resp.Kvs {
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keys = append(keys, string(kv.Key))
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values = append(values, string(kv.Value))
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}
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CheckElapseAndWarn(start, "Slow etcd operation load with prefix")
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return keys, values, nil
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}
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func (kv *EtcdKV) LoadWithPrefix2(key string) ([]string, []string, []int64, error) {
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start := time.Now()
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key = path.Join(kv.rootPath, key)
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ctx, cancel := context.WithTimeout(context.TODO(), RequestTimeout)
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defer cancel()
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resp, err := kv.client.Get(ctx, key, clientv3.WithPrefix(),
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clientv3.WithSort(clientv3.SortByKey, clientv3.SortAscend))
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if err != nil {
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return nil, nil, nil, err
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}
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keys := make([]string, 0, resp.Count)
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values := make([]string, 0, resp.Count)
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versions := make([]int64, 0, resp.Count)
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for _, kv := range resp.Kvs {
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keys = append(keys, string(kv.Key))
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values = append(values, string(kv.Value))
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versions = append(versions, kv.Version)
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}
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CheckElapseAndWarn(start, "Slow etcd operation load with prefix2")
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return keys, values, versions, nil
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}
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func (kv *EtcdKV) Load(key string) (string, error) {
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start := time.Now()
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key = path.Join(kv.rootPath, key)
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ctx, cancel := context.WithTimeout(context.TODO(), RequestTimeout)
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defer cancel()
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resp, err := kv.client.Get(ctx, key)
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if err != nil {
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return "", err
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}
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if resp.Count <= 0 {
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return "", fmt.Errorf("there is no value on key = %s", key)
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}
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CheckElapseAndWarn(start, "Slow etcd operation load")
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return string(resp.Kvs[0].Value), nil
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}
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func (kv *EtcdKV) MultiLoad(keys []string) ([]string, error) {
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start := time.Now()
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ops := make([]clientv3.Op, 0, len(keys))
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for _, keyLoad := range keys {
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ops = append(ops, clientv3.OpGet(path.Join(kv.rootPath, keyLoad)))
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}
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ctx, cancel := context.WithTimeout(context.TODO(), RequestTimeout)
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defer cancel()
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resp, err := kv.client.Txn(ctx).If().Then(ops...).Commit()
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if err != nil {
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return []string{}, err
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}
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result := make([]string, 0, len(keys))
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invalid := make([]string, 0, len(keys))
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for index, rp := range resp.Responses {
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if rp.GetResponseRange().Kvs == nil || len(rp.GetResponseRange().Kvs) == 0 {
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invalid = append(invalid, keys[index])
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result = append(result, "")
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}
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for _, ev := range rp.GetResponseRange().Kvs {
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result = append(result, string(ev.Value))
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}
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}
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if len(invalid) != 0 {
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log.Warn("MultiLoad: there are invalid keys", zap.Strings("keys", invalid))
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err = fmt.Errorf("there are invalid keys: %s", invalid)
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return result, err
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}
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CheckElapseAndWarn(start, "Slow etcd operation multi load")
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return result, nil
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}
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func (kv *EtcdKV) LoadWithRevision(key string) ([]string, []string, int64, error) {
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start := time.Now()
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key = path.Join(kv.rootPath, key)
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ctx, cancel := context.WithTimeout(context.TODO(), RequestTimeout)
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defer cancel()
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resp, err := kv.client.Get(ctx, key, clientv3.WithPrefix(),
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clientv3.WithSort(clientv3.SortByKey, clientv3.SortAscend))
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if err != nil {
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return nil, nil, 0, err
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}
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keys := make([]string, 0, resp.Count)
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values := make([]string, 0, resp.Count)
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for _, kv := range resp.Kvs {
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keys = append(keys, string(kv.Key))
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values = append(values, string(kv.Value))
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}
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CheckElapseAndWarn(start, "Slow etcd operation load with revision")
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return keys, values, resp.Header.Revision, nil
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}
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func (kv *EtcdKV) Save(key, value string) error {
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start := time.Now()
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key = path.Join(kv.rootPath, key)
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ctx, cancel := context.WithTimeout(context.TODO(), RequestTimeout)
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defer cancel()
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_, err := kv.client.Put(ctx, key, value)
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CheckElapseAndWarn(start, "Slow etcd operation save")
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return err
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}
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// SaveWithLease is a function to put value in etcd with etcd lease options.
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func (kv *EtcdKV) SaveWithLease(key, value string, id clientv3.LeaseID) error {
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start := time.Now()
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key = path.Join(kv.rootPath, key)
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ctx, cancel := context.WithTimeout(context.TODO(), RequestTimeout)
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defer cancel()
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_, err := kv.client.Put(ctx, key, value, clientv3.WithLease(id))
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CheckElapseAndWarn(start, "Slow etcd operation save with lease")
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return err
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}
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func (kv *EtcdKV) MultiSave(kvs map[string]string) error {
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start := time.Now()
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ops := make([]clientv3.Op, 0, len(kvs))
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for key, value := range kvs {
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ops = append(ops, clientv3.OpPut(path.Join(kv.rootPath, key), value))
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}
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ctx, cancel := context.WithTimeout(context.TODO(), RequestTimeout)
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defer cancel()
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_, err := kv.client.Txn(ctx).If().Then(ops...).Commit()
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CheckElapseAndWarn(start, "Slow etcd operation multi save")
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return err
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}
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func (kv *EtcdKV) RemoveWithPrefix(prefix string) error {
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start := time.Now()
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key := path.Join(kv.rootPath, prefix)
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ctx, cancel := context.WithTimeout(context.TODO(), RequestTimeout)
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defer cancel()
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_, err := kv.client.Delete(ctx, key, clientv3.WithPrefix())
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CheckElapseAndWarn(start, "Slow etcd operation remove with prefix")
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return err
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}
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func (kv *EtcdKV) Remove(key string) error {
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start := time.Now()
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key = path.Join(kv.rootPath, key)
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ctx, cancel := context.WithTimeout(context.TODO(), RequestTimeout)
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defer cancel()
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_, err := kv.client.Delete(ctx, key)
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CheckElapseAndWarn(start, "Slow etcd operation remove")
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return err
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}
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func (kv *EtcdKV) MultiRemove(keys []string) error {
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start := time.Now()
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ops := make([]clientv3.Op, 0, len(keys))
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for _, key := range keys {
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ops = append(ops, clientv3.OpDelete(path.Join(kv.rootPath, key)))
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}
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ctx, cancel := context.WithTimeout(context.TODO(), RequestTimeout)
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defer cancel()
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_, err := kv.client.Txn(ctx).If().Then(ops...).Commit()
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CheckElapseAndWarn(start, "Slow etcd operation multi remove")
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return err
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}
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func (kv *EtcdKV) MultiSaveAndRemove(saves map[string]string, removals []string) error {
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start := time.Now()
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ops := make([]clientv3.Op, 0, len(saves)+len(removals))
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for key, value := range saves {
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ops = append(ops, clientv3.OpPut(path.Join(kv.rootPath, key), value))
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}
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for _, keyDelete := range removals {
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ops = append(ops, clientv3.OpDelete(path.Join(kv.rootPath, keyDelete)))
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}
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ctx, cancel := context.WithTimeout(context.TODO(), RequestTimeout)
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defer cancel()
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_, err := kv.client.Txn(ctx).If().Then(ops...).Commit()
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CheckElapseAndWarn(start, "Slow etcd operation multi save and remove")
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return err
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}
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func (kv *EtcdKV) Watch(key string) clientv3.WatchChan {
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start := time.Now()
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key = path.Join(kv.rootPath, key)
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rch := kv.client.Watch(context.Background(), key, clientv3.WithCreatedNotify())
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CheckElapseAndWarn(start, "Slow etcd operation watch")
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return rch
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}
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func (kv *EtcdKV) WatchWithPrefix(key string) clientv3.WatchChan {
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start := time.Now()
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key = path.Join(kv.rootPath, key)
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rch := kv.client.Watch(context.Background(), key, clientv3.WithPrefix(), clientv3.WithCreatedNotify())
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CheckElapseAndWarn(start, "Slow etcd operation watch with prefix")
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return rch
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}
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func (kv *EtcdKV) WatchWithRevision(key string, revision int64) clientv3.WatchChan {
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start := time.Now()
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key = path.Join(kv.rootPath, key)
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rch := kv.client.Watch(context.Background(), key, clientv3.WithPrefix(), clientv3.WithPrevKV(), clientv3.WithRev(revision))
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CheckElapseAndWarn(start, "Slow etcd operation watch with revision")
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return rch
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}
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func (kv *EtcdKV) MultiRemoveWithPrefix(keys []string) error {
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start := time.Now()
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ops := make([]clientv3.Op, 0, len(keys))
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for _, k := range keys {
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op := clientv3.OpDelete(path.Join(kv.rootPath, k), clientv3.WithPrefix())
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ops = append(ops, op)
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}
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ctx, cancel := context.WithTimeout(context.TODO(), RequestTimeout)
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defer cancel()
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_, err := kv.client.Txn(ctx).If().Then(ops...).Commit()
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CheckElapseAndWarn(start, "Slow etcd operation multi remove with prefix")
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return err
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}
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func (kv *EtcdKV) MultiSaveAndRemoveWithPrefix(saves map[string]string, removals []string) error {
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start := time.Now()
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ops := make([]clientv3.Op, 0, len(saves))
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for key, value := range saves {
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ops = append(ops, clientv3.OpPut(path.Join(kv.rootPath, key), value))
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}
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for _, keyDelete := range removals {
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ops = append(ops, clientv3.OpDelete(path.Join(kv.rootPath, keyDelete), clientv3.WithPrefix()))
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}
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ctx, cancel := context.WithTimeout(context.TODO(), RequestTimeout)
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defer cancel()
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_, err := kv.client.Txn(ctx).If().Then(ops...).Commit()
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CheckElapseAndWarn(start, "Slow etcd operation multi save and move with prefix")
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return err
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}
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// Grant creates a new lease implemented in etcd grant interface.
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func (kv *EtcdKV) Grant(ttl int64) (id clientv3.LeaseID, err error) {
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start := time.Now()
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resp, err := kv.client.Grant(context.Background(), ttl)
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CheckElapseAndWarn(start, "Slow etcd operation grant")
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return resp.ID, err
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}
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// KeepAlive keeps the lease alive forever with leaseID.
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// Implemented in etcd interface.
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func (kv *EtcdKV) KeepAlive(id clientv3.LeaseID) (<-chan *clientv3.LeaseKeepAliveResponse, error) {
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start := time.Now()
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ch, err := kv.client.KeepAlive(context.Background(), id)
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if err != nil {
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return nil, err
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}
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CheckElapseAndWarn(start, "Slow etcd operation keepAlive")
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return ch, nil
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}
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// CompareValueAndSwap compares the existing value with compare, and if they are
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// equal, the target is stored in etcd.
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func (kv *EtcdKV) CompareValueAndSwap(key, value, target string, opts ...clientv3.OpOption) error {
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start := time.Now()
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ctx, cancel := context.WithTimeout(context.TODO(), RequestTimeout)
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defer cancel()
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resp, err := kv.client.Txn(ctx).If(
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clientv3.Compare(
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clientv3.Value(path.Join(kv.rootPath, key)),
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"=",
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value)).
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Then(clientv3.OpPut(path.Join(kv.rootPath, key), target, opts...)).Commit()
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if err != nil {
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return err
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}
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if !resp.Succeeded {
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return fmt.Errorf("function CompareAndSwap error for compare is false for key: %s", key)
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}
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CheckElapseAndWarn(start, "Slow etcd operation compare value and swap")
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return nil
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}
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// CompareVersionAndSwap compares the existing key-value's version with version, and if
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// they are equal, the target is stored in etcd.
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func (kv *EtcdKV) CompareVersionAndSwap(key string, version int64, target string, opts ...clientv3.OpOption) error {
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start := time.Now()
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ctx, cancel := context.WithTimeout(context.TODO(), RequestTimeout)
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defer cancel()
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resp, err := kv.client.Txn(ctx).If(
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clientv3.Compare(
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clientv3.Version(path.Join(kv.rootPath, key)),
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"=",
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version)).
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Then(clientv3.OpPut(path.Join(kv.rootPath, key), target, opts...)).Commit()
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if err != nil {
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return err
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}
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if !resp.Succeeded {
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return fmt.Errorf("function CompareAndSwap error for compare is false for key: %s", key)
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}
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CheckElapseAndWarn(start, "Slow etcd operation compare version and swap")
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return nil
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}
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func CheckElapseAndWarn(start time.Time, message string) bool {
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elapsed := time.Since(start)
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if elapsed.Milliseconds() > 2000 {
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log.Warn(message, zap.String("time spent", elapsed.String()))
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return true
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}
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return false
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}
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