go.chromium.org/luci@v0.0.0-20240309015107-7cdc2e660f33/server/tsmon/monitor.go (about)

     1  // Copyright 2023 The LUCI Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package tsmon
    16  
    17  import (
    18  	"context"
    19  
    20  	"go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc"
    21  	"google.golang.org/grpc"
    22  	"google.golang.org/grpc/credentials"
    23  
    24  	"go.chromium.org/luci/common/errors"
    25  	"go.chromium.org/luci/common/tsmon/monitor"
    26  	"go.chromium.org/luci/grpc/grpcmon"
    27  
    28  	"go.chromium.org/luci/server/auth"
    29  )
    30  
    31  // NewProdXMonitor creates a monitor that flushes metrics to the ProdX endpoint.
    32  //
    33  // It splits them into chunks of given size and impersonates the given service
    34  // account to authenticate calls.
    35  func NewProdXMonitor(ctx context.Context, chunkSize int, account string) (monitor.Monitor, error) {
    36  	cred, err := auth.GetPerRPCCredentials(
    37  		ctx, auth.AsActor,
    38  		auth.WithServiceAccount(account),
    39  		auth.WithScopes(monitor.ProdxmonScopes...),
    40  	)
    41  	if err != nil {
    42  		return nil, errors.Annotate(err, "failed to get per RPC credentials").Err()
    43  	}
    44  	conn, err := grpc.Dial(
    45  		prodXEndpoint,
    46  		grpc.WithTransportCredentials(credentials.NewTLS(nil)),
    47  		grpc.WithPerRPCCredentials(cred),
    48  		grpc.WithStatsHandler(&grpcmon.ClientRPCStatsMonitor{}),
    49  		grpc.WithUnaryInterceptor(otelgrpc.UnaryClientInterceptor()),
    50  		grpc.WithStreamInterceptor(otelgrpc.StreamClientInterceptor()),
    51  	)
    52  	if err != nil {
    53  		return nil, errors.Annotate(err, "failed to dial ProdX service %s", prodXEndpoint).Err()
    54  	}
    55  	return monitor.NewGRPCMonitor(ctx, chunkSize, conn), nil
    56  }