mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-01-19 02:48:24 +00:00
removing etcd sequencer
causing go mod tidy problem. If anyone wants this, please help to resolve this first. github.com/chrislusf/seaweedfs/weed/sequence imports go.etcd.io/etcd/client tested by go.etcd.io/etcd/client.test imports github.com/coreos/etcd/integration imports github.com/coreos/etcd/proxy/grpcproxy imports google.golang.org/grpc/naming: module google.golang.org/grpc@latest found (v1.41.0), but does not contain package google.golang.org/grpc/naming
This commit is contained in:
Chris Lu
parent
5ca0a551ac
commit
bf218cd59d
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@ -23,10 +23,7 @@ default = "localhost:8888" # used by maintenance scripts if the scripts needs
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[master.sequencer]
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type = "raft" # Choose [raft|etcd|snowflake] type for storing the file id sequence
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# when sequencer.type = etcd, set listen client urls of etcd cluster that store file id sequence
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# example : http://127.0.0.1:2379,http://127.0.0.1:2389
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sequencer_etcd_urls = "http://127.0.0.1:2379"
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type = "raft" # Choose [raft|snowflake] type for storing the file id sequence
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# when sequencer.type = snowflake, the snowflake id must be different from other masters
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sequencer_snowflake_id = 0 # any number between 1~1023
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@ -1,296 +0,0 @@
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package sequence
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/*
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Note :
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(1) store the sequence in the ETCD cluster, and local file(sequence.dat)
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(2) batch get the sequences from ETCD cluster, and store the max sequence id in the local file
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(3) the sequence range is : [currentSeqId, maxSeqId), when the currentSeqId >= maxSeqId, fetch the new maxSeqId.
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*/
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import (
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"context"
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"fmt"
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"go.etcd.io/etcd/client"
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"sync"
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"time"
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"io"
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"os"
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"strconv"
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"strings"
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"github.com/chrislusf/seaweedfs/weed/glog"
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)
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const (
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// EtcdKeyPrefix = "/seaweedfs"
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EtcdKeySequence = "/master/sequence"
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EtcdContextTimeoutSecond = 100 * time.Second
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DefaultEtcdSteps uint64 = 500 // internal counter
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SequencerFileName = "sequencer.dat"
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FileMaxSequenceLength = 128
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)
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type EtcdSequencer struct {
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sequenceLock sync.Mutex
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// available sequence range : [currentSeqId, maxSeqId)
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currentSeqId uint64
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maxSeqId uint64
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keysAPI client.KeysAPI
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seqFile *os.File
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}
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func NewEtcdSequencer(etcdUrls string, metaFolder string) (*EtcdSequencer, error) {
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file, err := openSequenceFile(metaFolder + "/" + SequencerFileName)
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if nil != err {
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return nil, fmt.Errorf("open sequence file fialed, %v", err)
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}
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cli, err := client.New(client.Config{
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Endpoints: strings.Split(etcdUrls, ","),
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Username: "",
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Password: "",
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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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keysApi := client.NewKeysAPI(cli)
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// TODO: the current sequence id in local file is not used
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maxValue, _, err := readSequenceFile(file)
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if err != nil {
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return nil, fmt.Errorf("read sequence from file failed, %v", err)
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}
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glog.V(4).Infof("read sequence from file : %d", maxValue)
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newSeq, err := setMaxSequenceToEtcd(keysApi, maxValue)
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if err != nil {
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return nil, err
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}
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sequencer := &EtcdSequencer{maxSeqId: newSeq,
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currentSeqId: newSeq,
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keysAPI: keysApi,
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seqFile: file,
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}
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return sequencer, nil
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}
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func (es *EtcdSequencer) NextFileId(count uint64) uint64 {
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es.sequenceLock.Lock()
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defer es.sequenceLock.Unlock()
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if (es.currentSeqId + count) >= es.maxSeqId {
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reqSteps := DefaultEtcdSteps
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if count > DefaultEtcdSteps {
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reqSteps += count
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}
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maxId, err := batchGetSequenceFromEtcd(es.keysAPI, reqSteps)
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glog.V(4).Infof("get max sequence id from etcd, %d", maxId)
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if err != nil {
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glog.Error(err)
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return 0
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}
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es.currentSeqId, es.maxSeqId = maxId-reqSteps, maxId
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glog.V(4).Infof("current id : %d, max id : %d", es.currentSeqId, es.maxSeqId)
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if err := writeSequenceFile(es.seqFile, es.maxSeqId, es.currentSeqId); err != nil {
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glog.Errorf("flush sequence to file failed, %v", err)
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}
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}
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ret := es.currentSeqId
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es.currentSeqId += count
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return ret
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}
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/**
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instead of collecting the max value from volume server,
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the max value should be saved in local config file and ETCD cluster
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*/
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func (es *EtcdSequencer) SetMax(seenValue uint64) {
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es.sequenceLock.Lock()
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defer es.sequenceLock.Unlock()
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if seenValue > es.maxSeqId {
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maxId, err := setMaxSequenceToEtcd(es.keysAPI, seenValue)
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if err != nil {
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glog.Errorf("set Etcd Max sequence failed : %v", err)
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return
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}
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es.currentSeqId, es.maxSeqId = maxId, maxId
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if err := writeSequenceFile(es.seqFile, maxId, maxId); err != nil {
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glog.Errorf("flush sequence to file failed, %v", err)
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}
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}
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}
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func (es *EtcdSequencer) GetMax() uint64 {
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return es.maxSeqId
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}
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func (es *EtcdSequencer) Peek() uint64 {
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return es.currentSeqId
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}
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func batchGetSequenceFromEtcd(kvApi client.KeysAPI, step uint64) (uint64, error) {
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if step <= 0 {
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return 0, fmt.Errorf("the step must be large than 1")
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}
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ctx, cancel := context.WithTimeout(context.Background(), EtcdContextTimeoutSecond)
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var endSeqValue uint64 = 0
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defer cancel()
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for {
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getResp, err := kvApi.Get(ctx, EtcdKeySequence, &client.GetOptions{Recursive: false, Quorum: true})
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if err != nil {
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return 0, err
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}
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if getResp.Node == nil {
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continue
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}
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prevValue := getResp.Node.Value
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prevSeqValue, err := strconv.ParseUint(prevValue, 10, 64)
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if err != nil {
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return 0, fmt.Errorf("get sequence from etcd failed, %v", err)
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}
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endSeqValue = prevSeqValue + step
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endSeqStr := strconv.FormatUint(endSeqValue, 10)
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_, err = kvApi.Set(ctx, EtcdKeySequence, endSeqStr, &client.SetOptions{PrevValue: prevValue})
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if err == nil {
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break
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}
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glog.Error(err)
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}
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return endSeqValue, nil
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}
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/**
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update the value of the key EtcdKeySequence in ETCD cluster with the parameter of maxSeq,
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when the value of the key EtcdKeySequence is equal to or large than the parameter maxSeq,
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return the value of EtcdKeySequence in the ETCD cluster;
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when the value of the EtcdKeySequence is less than the parameter maxSeq,
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return the value of the parameter maxSeq
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*/
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func setMaxSequenceToEtcd(kvApi client.KeysAPI, maxSeq uint64) (uint64, error) {
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maxSeqStr := strconv.FormatUint(maxSeq, 10)
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ctx, cancel := context.WithTimeout(context.Background(), EtcdContextTimeoutSecond)
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defer cancel()
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for {
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getResp, err := kvApi.Get(ctx, EtcdKeySequence, &client.GetOptions{Recursive: false, Quorum: true})
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if err != nil {
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if ce, ok := err.(client.Error); ok && (ce.Code == client.ErrorCodeKeyNotFound) {
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_, err := kvApi.Create(ctx, EtcdKeySequence, maxSeqStr)
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if err == nil {
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continue
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}
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if ce, ok = err.(client.Error); ok && (ce.Code == client.ErrorCodeNodeExist) {
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continue
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}
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return 0, err
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} else {
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return 0, err
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}
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}
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if getResp.Node == nil {
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continue
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}
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prevSeqStr := getResp.Node.Value
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prevSeq, err := strconv.ParseUint(prevSeqStr, 10, 64)
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if err != nil {
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return 0, err
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}
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if prevSeq >= maxSeq {
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return prevSeq, nil
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}
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_, err = kvApi.Set(ctx, EtcdKeySequence, maxSeqStr, &client.SetOptions{PrevValue: prevSeqStr})
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if err != nil {
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return 0, err
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}
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}
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}
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func openSequenceFile(file string) (*os.File, error) {
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_, err := os.Stat(file)
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if os.IsNotExist(err) {
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fid, err := os.OpenFile(file, os.O_RDWR|os.O_CREATE, 0644)
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if err != nil {
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return nil, err
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}
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if err := writeSequenceFile(fid, 1, 0); err != nil {
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return nil, err
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}
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return fid, nil
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} else {
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return os.OpenFile(file, os.O_RDWR|os.O_CREATE, 0644)
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}
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}
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/*
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read sequence and step from sequence file
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*/
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func readSequenceFile(file *os.File) (uint64, uint64, error) {
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sequence := make([]byte, FileMaxSequenceLength)
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size, err := file.ReadAt(sequence, 0)
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if (err != nil) && (err != io.EOF) {
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err := fmt.Errorf("cannot read file %s, %v", file.Name(), err)
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return 0, 0, err
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}
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sequence = sequence[0:size]
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seqs := strings.Split(string(sequence), ":")
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maxId, err := strconv.ParseUint(seqs[0], 10, 64)
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if err != nil {
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return 0, 0, fmt.Errorf("parse sequence from file failed, %v", err)
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}
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if len(seqs) > 1 {
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step, err := strconv.ParseUint(seqs[1], 10, 64)
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if err != nil {
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return 0, 0, fmt.Errorf("parse sequence from file failed, %v", err)
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}
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return maxId, step, nil
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}
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return maxId, 0, nil
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}
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/**
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write the sequence and step to sequence file
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*/
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func writeSequenceFile(file *os.File, sequence, step uint64) error {
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_ = step
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seqStr := fmt.Sprintf("%d:%d", sequence, sequence)
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if _, err := file.Seek(0, 0); err != nil {
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err = fmt.Errorf("cannot seek to the beginning of %s: %v", file.Name(), err)
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return err
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}
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if err := file.Truncate(0); err != nil {
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return fmt.Errorf("truncate sequence file faield : %v", err)
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}
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if _, err := file.WriteString(seqStr); err != nil {
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return fmt.Errorf("write file %s failed, %v", file.Name(), err)
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}
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if err := file.Sync(); err != nil {
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return fmt.Errorf("flush file %s failed, %v", file.Name(), err)
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}
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return nil
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}
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// the UT helper method
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// func deleteEtcdKey(kvApi client.KeysAPI, key string) error {
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// ctx, cancel := context.WithTimeout(context.Background(), EtcdContextTimeoutSecond)
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// defer cancel()
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// _, err := kvApi.Delete(ctx, key, &client.DeleteOptions{Dir: false})
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// if err != nil {
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// return err
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// }
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// return nil
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// }
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@ -28,7 +28,6 @@ import (
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const (
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SequencerType = "master.sequencer.type"
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SequencerEtcdUrls = "master.sequencer.sequencer_etcd_urls"
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SequencerSnowflakeId = "master.sequencer.sequencer_snowflake_id"
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)
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@ -286,15 +285,6 @@ func (ms *MasterServer) createSequencer(option *MasterOption) sequence.Sequencer
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seqType := strings.ToLower(v.GetString(SequencerType))
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glog.V(1).Infof("[%s] : [%s]", SequencerType, seqType)
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switch strings.ToLower(seqType) {
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case "etcd":
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var err error
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urls := v.GetString(SequencerEtcdUrls)
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glog.V(0).Infof("[%s] : [%s]", SequencerEtcdUrls, urls)
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seq, err = sequence.NewEtcdSequencer(urls, option.MetaFolder)
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if err != nil {
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glog.Error(err)
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seq = nil
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}
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case "snowflake":
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var err error
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snowflakeId := v.GetInt(SequencerSnowflakeId)
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