mirror of
https://gitee.com/milvus-io/milvus.git
synced 2026-01-07 19:31:51 +08:00
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>
64 lines
1.8 KiB
Go
64 lines
1.8 KiB
Go
package resolver
|
|
|
|
import (
|
|
"github.com/cockroachdb/errors"
|
|
"go.uber.org/zap"
|
|
"google.golang.org/grpc/resolver"
|
|
|
|
"github.com/milvus-io/milvus/pkg/log"
|
|
"github.com/milvus-io/milvus/pkg/util/lifetime"
|
|
)
|
|
|
|
var _ resolver.Resolver = (*watchBasedGRPCResolver)(nil)
|
|
|
|
// newWatchBasedGRPCResolver creates a new watch based grpc resolver.
|
|
func newWatchBasedGRPCResolver(cc resolver.ClientConn, logger *log.MLogger) *watchBasedGRPCResolver {
|
|
return &watchBasedGRPCResolver{
|
|
lifetime: lifetime.NewLifetime(lifetime.Working),
|
|
cc: cc,
|
|
logger: logger,
|
|
}
|
|
}
|
|
|
|
// watchBasedGRPCResolver is a watch based grpc resolver.
|
|
type watchBasedGRPCResolver struct {
|
|
lifetime lifetime.Lifetime[lifetime.State]
|
|
|
|
cc resolver.ClientConn
|
|
logger *log.MLogger
|
|
}
|
|
|
|
// ResolveNow will be called by gRPC to try to resolve the target name
|
|
// again. It's just a hint, resolver can ignore this if it's not necessary.
|
|
//
|
|
// It could be called multiple times concurrently.
|
|
func (r *watchBasedGRPCResolver) ResolveNow(_ resolver.ResolveNowOptions) {
|
|
}
|
|
|
|
// Close closes the resolver.
|
|
// Do nothing.
|
|
func (r *watchBasedGRPCResolver) Close() {
|
|
r.lifetime.SetState(lifetime.Stopped)
|
|
r.lifetime.Wait()
|
|
r.lifetime.Close()
|
|
}
|
|
|
|
func (r *watchBasedGRPCResolver) Update(state VersionedState) error {
|
|
if r.lifetime.Add(lifetime.IsWorking) != nil {
|
|
return errors.New("resolver is closed")
|
|
}
|
|
defer r.lifetime.Done()
|
|
|
|
if err := r.cc.UpdateState(state.State); err != nil {
|
|
// watch based resolver could ignore the error.
|
|
r.logger.Warn("fail to update resolver state", zap.Error(err))
|
|
}
|
|
r.logger.Info("update resolver state success", zap.Any("state", state.State))
|
|
return nil
|
|
}
|
|
|
|
// State returns the state of the resolver.
|
|
func (r *watchBasedGRPCResolver) State() lifetime.State {
|
|
return r.lifetime.GetState()
|
|
}
|