forked from open-telemetry/opentelemetry-collector-contrib
/
dynamicconfig.go
85 lines (72 loc) · 2.47 KB
/
dynamicconfig.go
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// Copyright The OpenTelemetry Authors
//
// Licensed 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 dynamicconfig
import (
"context"
"net"
"go.opentelemetry.io/collector/component"
"go.uber.org/zap"
"google.golang.org/grpc"
pb "github.com/open-telemetry/opentelemetry-collector-contrib/extension/dynamicconfig/proto/experimental/metrics/configservice"
"github.com/open-telemetry/opentelemetry-collector-contrib/extension/dynamicconfig/service"
)
type dynamicConfigExtension struct {
config Config // extension-level configs
logger *zap.Logger
server *grpc.Server // gRPC server that physically serves the ConfigService
configService *service.ConfigService // implements the gRPC configuration service
}
func newServer(config Config, logger *zap.Logger) (*dynamicConfigExtension, error) {
de := &dynamicConfigExtension{
config: config,
logger: logger,
server: grpc.NewServer(),
}
return de, nil
}
func (de *dynamicConfigExtension) Start(ctx context.Context, host component.Host) error {
de.logger.Info("Starting dynamic config extension", zap.Any("config", de.config))
listen, err := net.Listen("tcp", de.config.Endpoint)
if err != nil {
return err
}
var configService *service.ConfigService
if de.config.RemoteConfigAddress != "" {
configService, err = service.NewConfigService(
service.WithRemoteConfig(de.config.RemoteConfigAddress),
)
} else {
configService, err = service.NewConfigService(
service.WithFileConfig(de.config.LocalConfigFile),
service.WithWaitTime(int32(de.config.WaitTime)),
)
}
if err != nil {
return err
}
de.configService = configService
pb.RegisterMetricConfigServer(de.server, configService)
go func() {
if err := de.server.Serve(listen); err != nil {
host.ReportFatalError(err)
}
}()
return nil
}
func (de *dynamicConfigExtension) Shutdown(ctx context.Context) error {
de.logger.Info("Shutting down dynamic config extension")
de.configService.Stop()
de.server.GracefulStop()
return nil
}