/
node_manager.go
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/
node_manager.go
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// Licensed to the LF AI & Data foundation under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package session
import (
"fmt"
"sync"
"time"
"github.com/blang/semver/v4"
"go.uber.org/atomic"
"go.uber.org/zap"
"github.com/milvus-io/milvus/pkg/log"
"github.com/milvus-io/milvus/pkg/metrics"
"github.com/milvus-io/milvus/pkg/util/merr"
)
type Manager interface {
Add(node *NodeInfo)
Stopping(nodeID int64)
Remove(nodeID int64)
Get(nodeID int64) *NodeInfo
GetAll() []*NodeInfo
Suspend(nodeID int64) error
Resume(nodeID int64) error
}
type NodeManager struct {
mu sync.RWMutex
nodes map[int64]*NodeInfo
}
func (m *NodeManager) Add(node *NodeInfo) {
m.mu.Lock()
defer m.mu.Unlock()
m.nodes[node.ID()] = node
metrics.QueryCoordNumQueryNodes.WithLabelValues().Set(float64(len(m.nodes)))
}
func (m *NodeManager) Remove(nodeID int64) {
m.mu.Lock()
defer m.mu.Unlock()
delete(m.nodes, nodeID)
metrics.QueryCoordNumQueryNodes.WithLabelValues().Set(float64(len(m.nodes)))
}
func (m *NodeManager) Stopping(nodeID int64) {
m.mu.Lock()
defer m.mu.Unlock()
if nodeInfo, ok := m.nodes[nodeID]; ok {
nodeInfo.SetState(NodeStateStopping)
}
}
func (m *NodeManager) Suspend(nodeID int64) error {
m.mu.Lock()
defer m.mu.Unlock()
nodeInfo, ok := m.nodes[nodeID]
if !ok {
return merr.WrapErrNodeNotFound(nodeID)
}
switch nodeInfo.GetState() {
case NodeStateNormal:
nodeInfo.SetState(NodeStateSuspend)
return nil
default:
log.Warn("failed to suspend query node", zap.Int64("nodeID", nodeID), zap.String("state", nodeInfo.GetState().String()))
return merr.WrapErrNodeStateUnexpected(nodeID, nodeInfo.GetState().String(), "failed to suspend a query node")
}
}
func (m *NodeManager) Resume(nodeID int64) error {
m.mu.Lock()
defer m.mu.Unlock()
nodeInfo, ok := m.nodes[nodeID]
if !ok {
return merr.WrapErrNodeNotFound(nodeID)
}
switch nodeInfo.GetState() {
case NodeStateSuspend:
nodeInfo.SetState(NodeStateNormal)
return nil
default:
log.Warn("failed to resume query node", zap.Int64("nodeID", nodeID), zap.String("state", nodeInfo.GetState().String()))
return merr.WrapErrNodeStateUnexpected(nodeID, nodeInfo.GetState().String(), "failed to resume query node")
}
}
func (m *NodeManager) IsStoppingNode(nodeID int64) (bool, error) {
m.mu.RLock()
defer m.mu.RUnlock()
node := m.nodes[nodeID]
if node == nil {
return false, fmt.Errorf("nodeID[%d] isn't existed", nodeID)
}
return node.IsStoppingState(), nil
}
func (m *NodeManager) Get(nodeID int64) *NodeInfo {
m.mu.RLock()
defer m.mu.RUnlock()
return m.nodes[nodeID]
}
func (m *NodeManager) GetAll() []*NodeInfo {
m.mu.RLock()
defer m.mu.RUnlock()
ret := make([]*NodeInfo, 0, len(m.nodes))
for _, n := range m.nodes {
ret = append(ret, n)
}
return ret
}
func NewNodeManager() *NodeManager {
return &NodeManager{
nodes: make(map[int64]*NodeInfo),
}
}
type State int
const (
NormalStateName = "Normal"
StoppingStateName = "Stopping"
SuspendStateName = "Suspend"
)
type ImmutableNodeInfo struct {
NodeID int64
Address string
Hostname string
Version semver.Version
}
const (
NodeStateNormal State = iota
NodeStateStopping
NodeStateSuspend
)
var stateNameMap = map[State]string{
NodeStateNormal: NormalStateName,
NodeStateStopping: StoppingStateName,
NodeStateSuspend: SuspendStateName,
}
func (s State) String() string {
return stateNameMap[s]
}
type NodeInfo struct {
stats
mu sync.RWMutex
immutableInfo ImmutableNodeInfo
state State
lastHeartbeat *atomic.Int64
}
func (n *NodeInfo) ID() int64 {
return n.immutableInfo.NodeID
}
func (n *NodeInfo) Addr() string {
return n.immutableInfo.Address
}
func (n *NodeInfo) Hostname() string {
return n.immutableInfo.Hostname
}
func (n *NodeInfo) SegmentCnt() int {
n.mu.RLock()
defer n.mu.RUnlock()
return n.stats.getSegmentCnt()
}
func (n *NodeInfo) ChannelCnt() int {
n.mu.RLock()
defer n.mu.RUnlock()
return n.stats.getChannelCnt()
}
func (n *NodeInfo) SetLastHeartbeat(time time.Time) {
n.lastHeartbeat.Store(time.UnixNano())
}
func (n *NodeInfo) LastHeartbeat() time.Time {
return time.Unix(0, n.lastHeartbeat.Load())
}
func (n *NodeInfo) IsStoppingState() bool {
n.mu.RLock()
defer n.mu.RUnlock()
return n.state == NodeStateStopping
}
func (n *NodeInfo) SetState(s State) {
n.mu.Lock()
defer n.mu.Unlock()
n.state = s
}
func (n *NodeInfo) GetState() State {
n.mu.RLock()
defer n.mu.RUnlock()
return n.state
}
func (n *NodeInfo) UpdateStats(opts ...StatsOption) {
n.mu.Lock()
for _, opt := range opts {
opt(n)
}
n.mu.Unlock()
}
func (n *NodeInfo) Version() semver.Version {
return n.immutableInfo.Version
}
func NewNodeInfo(info ImmutableNodeInfo) *NodeInfo {
return &NodeInfo{
stats: newStats(),
immutableInfo: info,
lastHeartbeat: atomic.NewInt64(0),
}
}
type StatsOption func(*NodeInfo)
func WithSegmentCnt(cnt int) StatsOption {
return func(n *NodeInfo) {
n.setSegmentCnt(cnt)
}
}
func WithChannelCnt(cnt int) StatsOption {
return func(n *NodeInfo) {
n.setChannelCnt(cnt)
}
}