HostDetectorSync.ts

/*
 * 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
 *
 *      https://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.
 */

import { SemanticResourceAttributes } from '@opentelemetry/semantic-conventions';
import { Resource } from '../../Resource';
import { DetectorSync, ResourceAttributes } from '../../types';
import { ResourceDetectionConfig } from '../../config';
import { arch, hostname } from 'os';
import { normalizeArch } from './utils';
import { getMachineId } from './machine-id/getMachineId';

/**
 * HostDetectorSync detects the resources related to the host current process is
 * running on. Currently only non-cloud-based attributes are included.
 */
class HostDetectorSync implements DetectorSync {
  detect(_config?: ResourceDetectionConfig): Resource {
    const attributes: ResourceAttributes = {
      [SemanticResourceAttributes.HOST_NAME]: hostname(),
      [SemanticResourceAttributes.HOST_ARCH]: normalizeArch(arch()),
    };

    return new Resource(attributes, this._getAsyncAttributes());
  }

  private _getAsyncAttributes(): Promise<ResourceAttributes> {
    return getMachineId().then(machineId => {
      const attributes: ResourceAttributes = {};
      if (machineId) {
        attributes[SemanticResourceAttributes.HOST_ID] = machineId;
      }
      return attributes;
    });
  }
}

export const hostDetectorSync = new HostDetectorSync();