mirror of
https://gitee.com/milvus-io/milvus.git
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130 lines
4.0 KiB
Go
130 lines
4.0 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 observers
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import (
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"context"
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"sync"
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"time"
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"go.uber.org/zap"
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"github.com/milvus-io/milvus/internal/log"
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"github.com/milvus-io/milvus/internal/querycoordv2/meta"
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"github.com/milvus-io/milvus/internal/querycoordv2/params"
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"github.com/milvus-io/milvus/internal/querycoordv2/utils"
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)
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// check replica, find outbound nodes and remove it from replica if all segment/channel has been moved
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type ReplicaObserver struct {
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c chan struct{}
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wg sync.WaitGroup
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meta *meta.Meta
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distMgr *meta.DistributionManager
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stopOnce sync.Once
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}
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func NewReplicaObserver(meta *meta.Meta, distMgr *meta.DistributionManager) *ReplicaObserver {
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return &ReplicaObserver{
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c: make(chan struct{}),
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meta: meta,
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distMgr: distMgr,
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}
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}
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func (ob *ReplicaObserver) Start(ctx context.Context) {
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ob.wg.Add(1)
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go ob.schedule(ctx)
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}
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func (ob *ReplicaObserver) Stop() {
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ob.stopOnce.Do(func() {
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close(ob.c)
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ob.wg.Wait()
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})
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}
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func (ob *ReplicaObserver) schedule(ctx context.Context) {
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defer ob.wg.Done()
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log.Info("Start check replica loop")
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ticker := time.NewTicker(params.Params.QueryCoordCfg.CheckNodeInReplicaInterval.GetAsDuration(time.Second))
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defer ticker.Stop()
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for {
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select {
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case <-ctx.Done():
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log.Info("Close replica observer due to context canceled")
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return
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case <-ob.c:
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log.Info("Close replica observer")
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return
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case <-ticker.C:
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ob.checkNodesInReplica()
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}
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}
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}
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func (ob *ReplicaObserver) checkNodesInReplica() {
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log := log.Ctx(context.Background()).WithRateGroup("qcv2.replicaObserver", 1, 60)
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collections := ob.meta.GetAll()
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for _, collectionID := range collections {
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removedNodes := make([]int64, 0)
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// remove nodes from replica which has been transferred to other rg
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replicas := ob.meta.ReplicaManager.GetByCollection(collectionID)
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for _, replica := range replicas {
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outboundNodes := ob.meta.ResourceManager.CheckOutboundNodes(replica)
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if len(outboundNodes) > 0 {
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log.RatedInfo(10, "found outbound nodes in replica",
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zap.Int64("collectionID", replica.GetCollectionID()),
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zap.Int64("replicaID", replica.GetID()),
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zap.Int64s("allOutboundNodes", outboundNodes.Collect()),
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)
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for node := range outboundNodes {
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channels := ob.distMgr.ChannelDistManager.GetByCollectionAndNode(collectionID, node)
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segments := ob.distMgr.SegmentDistManager.GetByCollectionAndNode(collectionID, node)
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if len(channels) == 0 && len(segments) == 0 {
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replica.RemoveNode(node)
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removedNodes = append(removedNodes, node)
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log.Info("all segment/channel has been removed from outbound node, remove it from replica",
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zap.Int64("collectionID", replica.GetCollectionID()),
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zap.Int64("replicaID", replica.GetID()),
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zap.Int64("removedNodes", node),
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zap.Int64s("availableNodes", replica.GetNodes()),
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)
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}
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}
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}
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}
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// assign removed nodes to other replicas in current rg
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for _, node := range removedNodes {
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rg, err := ob.meta.ResourceManager.FindResourceGroupByNode(node)
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if err != nil {
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// unreachable logic path
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log.Warn("found node which does not belong to any resource group", zap.Int64("nodeID", node))
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continue
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}
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replicas := ob.meta.ReplicaManager.GetByCollectionAndRG(collectionID, rg)
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utils.AddNodesToReplicas(ob.meta, replicas, node)
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}
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}
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}
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