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fda720b880
issue: #33285 - add two grpc resolver (by session and by streaming coord assignment service) - add one grpc balancer (by serverID and roundrobin) - add lazy conn to avoid block by first service discovery - add some utility function for streaming service Signed-off-by: chyezh <chyezh@outlook.com>
78 lines
2.2 KiB
Go
78 lines
2.2 KiB
Go
package picker
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import (
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"go.uber.org/atomic"
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"go.uber.org/zap"
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"google.golang.org/grpc/balancer"
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"google.golang.org/grpc/balancer/base"
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"github.com/milvus-io/milvus/internal/util/streamingutil/service/attributes"
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bbalancer "github.com/milvus-io/milvus/internal/util/streamingutil/service/balancer"
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"github.com/milvus-io/milvus/pkg/log"
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)
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const (
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ServerIDPickerBalancerName = "server_id_picker"
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)
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func init() {
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balancer.Register(bbalancer.NewBalancerBuilder(
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ServerIDPickerBalancerName,
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&serverIDPickerBuilder{},
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base.Config{HealthCheck: true}),
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)
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}
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// serverIDPickerBuilder is a bkproxy picker builder.
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type serverIDPickerBuilder struct{}
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// Build returns a picker that will be used by gRPC to pick a SubConn.
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func (b *serverIDPickerBuilder) Build(info bbalancer.PickerBuildInfo) balancer.Picker {
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if len(info.ReadySCs) == 0 {
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return base.NewErrPicker(balancer.ErrNoSubConnAvailable)
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}
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readyMap := make(map[int64]subConnInfo, len(info.ReadySCs))
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readyList := make([]subConnInfo, 0, len(info.ReadySCs))
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for sc, scInfo := range info.ReadySCs {
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serverID := attributes.GetServerID(scInfo.Address.BalancerAttributes)
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if serverID == nil {
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log.Warn("no server id found in subConn", zap.String("address", scInfo.Address.Addr))
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continue
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}
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info := subConnInfo{
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serverID: *serverID,
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subConn: sc,
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subConnInfo: scInfo,
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}
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readyMap[*serverID] = info
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readyList = append(readyList, info)
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}
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unReadyMap := make(map[int64]subConnInfo, len(info.UnReadySCs))
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for sc, scInfo := range info.UnReadySCs {
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serverID := attributes.GetServerID(scInfo.Address.BalancerAttributes)
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if serverID == nil {
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log.Warn("no server id found in subConn", zap.String("address", scInfo.Address.Addr))
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continue
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}
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info := subConnInfo{
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serverID: *serverID,
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subConn: sc,
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subConnInfo: scInfo,
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}
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unReadyMap[*serverID] = info
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}
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if len(readyList) == 0 {
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log.Warn("no subConn available after serverID filtering")
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return base.NewErrPicker(balancer.ErrNoSubConnAvailable)
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}
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p := &serverIDPicker{
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next: atomic.NewInt64(0),
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readySubConnsMap: readyMap,
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readySubConsList: readyList,
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unreadySubConnsMap: unReadyMap,
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}
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return p
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}
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