Microfrontend+BFF integration with opentelemetry

[AM1988]

Hi there.

I have an Angular micro frontend application that communicates with express BFF(backend for frontend).

It is bundled with webpack during the build step and lives in a docker container.

The frontend part uses @jufab/opentelemetry-angular-interceptor and BFF - using require like node -r "./tracer.js" index.js.

When I am starting the container I see weird logs like:

@opentelemetry/api: Registered a global for diag v1.2.0.
@opentelemetry/api: Registered a global for trace v1.2.0.
@opentelemetry/api: Registered a global for context v1.2.0.
@opentelemetry/api: Registered a global for propagation v1.2.0.
@opentelemetry/instrumentation-http Applying patch for [email protected]
@opentelemetry/instrumentation-http Applying patch for [email protected]
{"level":"INFO","message":"Express server is listening on http://localhost:5000","traceId":"not_available","timestamp":"2022-11-17T12:00:52.484Z"}
e found resource. e { attributes: {} }
e found resource. e {
  attributes: {
    'process.pid': 23,
    'process.executable.name': 'node',
    'process.command': '/app/index.js',
    'process.command_line': '/usr/bin/node /app/index.js',
    'process.runtime.version': '16.17.1',
    'process.runtime.name': 'nodejs',
    'process.runtime.description': 'Node.js'
  }
}
Error: @opentelemetry/api: Attempted duplicate registration of API: trace
    at l (/app/tracer.js:1:4498)
    at e.setGlobalTracerProvider (/app/tracer.js:1:15189)
    at u.e.register (/app/tracer.js:1:463626)
    at u.register (/app/tracer.js:1:408917)
    at t.NodeSDK.start (/app/tracer.js:1:312285)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at async /app/tracer.js:1:547380
Error: @opentelemetry/api: Attempted duplicate registration of API: context
    at l (/app/tracer.js:1:4498)
    at e.setGlobalContextManager (/app/tracer.js:1:9869)
    at u.e.register (/app/tracer.js:1:463753)
    at u.register (/app/tracer.js:1:408917)
    at t.NodeSDK.start (/app/tracer.js:1:312285)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at async /app/tracer.js:1:547380
Error: @opentelemetry/api: Attempted duplicate registration of API: propagation

and when the trace is being sent

    links: [],
    events: [],
    status: { code: 0 },
    endTime: [ 1668686488, 733854133 ],
    _ended: true,
    _duration: [ 0, 3654625 ],
    name: 'HTTP GET',
    _spanContext: {
      traceId: '1a1f7248060eba1701bd703b0cd2f816',
      spanId: '29e3976b17c39a63',
      traceFlags: 1,
      traceState: undefined
    },
    parentSpanId: undefined,
    kind: 1,
    startTime: [ 1668686488, 730199508 ],
    resource: e { attributes: [Object] },
    instrumentationLibrary: {
      name: '@opentelemetry/instrumentation-http',
      version: '0.32.0',
      schemaUrl: undefined
    },
    _spanLimits: {
      attributeValueLengthLimit: Infinity,
      attributeCountLimit: 128,
      linkCountLimit: 128,
      eventCountLimit: 128
    },
    _spanProcessor: e { _spanProcessors: [Array] },
    _attributeValueLengthLimit: Infinity
  }
]
Instrumentation suppressed, returning Noop Span

As a result I do not see any result is eager. What could be the reason for that?