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feat: instrument src/ with traces using OpenTelemetry
This change implements tracing of RPC calls using OpenTelemetry to aid in providing observability. Fixes #2079
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,103 @@ | ||
| // Copyright 2024 Google LLC | ||
| // | ||
| // 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. | ||
| // | ||
|
|
||
| describe('Enabled gRPC instrumentation with sampling on', () => { | ||
| const assert = require('assert'); | ||
| const {registerInstrumentations} = require('@opentelemetry/instrumentation'); | ||
| const {SimpleSpanProcessor} = require('@opentelemetry/sdk-trace-base'); | ||
| const { | ||
| InMemorySpanExporter, | ||
| NodeTracerProvider, | ||
| } = require('@opentelemetry/sdk-trace-node'); | ||
| const {GrpcInstrumentation} = require('@opentelemetry/instrumentation-grpc'); | ||
| const done = registerInstrumentations({ | ||
| instrumentations: [new GrpcInstrumentation()], | ||
| }); | ||
|
|
||
| const projectId = process.env.SPANNER_TEST_PROJECTID || 'test-project'; | ||
| const {Spanner} = require('../src'); | ||
| const spanner = new Spanner({ | ||
| projectId: projectId, | ||
| }); | ||
| const instance = spanner.instance('test-instance'); | ||
| const database = instance.database('test-db'); | ||
|
|
||
| const exporter = new InMemorySpanExporter(); | ||
| const provider = new NodeTracerProvider(); | ||
| provider.addSpanProcessor(new SimpleSpanProcessor(exporter)); | ||
| provider.register(); | ||
|
|
||
| beforeEach(async () => { | ||
| // Mimick usual customer usage in which at setup time, the | ||
| // Spanner and Database handles are created once then sit | ||
| // and wait until they service HTTP or gRPC calls that | ||
| // come in say 5+ seconds after the service is fully started. | ||
| // This gives time for the batch session creation to be be completed. | ||
| await new Promise((resolve, reject) => setTimeout(resolve, 100)); | ||
|
|
||
| exporter.reset(); | ||
| }); | ||
|
|
||
| after(async () => { | ||
| database.close(); | ||
| spanner.close(); | ||
| await provider.shutdown(); | ||
| done(); | ||
| }); | ||
|
|
||
| it('Invoking database methods creates spans: gRPC enabled', async () => { | ||
| const query = {sql: 'SELECT * FROM INFORMATION_SCHEMA.TABLES'}; | ||
| const [rows] = await database.run(query); | ||
| assert.ok(rows.length > 1); | ||
|
|
||
| // We need to ensure that spans were generated and exported. | ||
| const spans = exporter.getFinishedSpans(); | ||
| assert.ok(spans.length > 0, 'at least 1 span must have been created'); | ||
|
|
||
| // Sort the spans by duration, in the natural | ||
| // trace view order by longer duration first. | ||
| spans.sort((spanA, spanB) => { | ||
| return spanA.duration > spanB.duration; | ||
| }); | ||
|
|
||
| const got: string[] = []; | ||
| spans.forEach(span => { | ||
| got.push(span.name); | ||
| }); | ||
|
|
||
| const want = ['grpc.google.spanner.v1.Spanner/ExecuteStreamingSql']; | ||
|
|
||
| assert.deepEqual( | ||
| want, | ||
| got, | ||
| 'The spans order by duration has been violated:\n\tGot: ' + | ||
| got.toString() + | ||
| '\n\tWant: ' + | ||
| want.toString() | ||
| ); | ||
|
|
||
| // Ensure that each span has the attribute | ||
| // SEMATTRS_DB_SYSTEM, set to 'spanner' | ||
| spans.forEach(span => { | ||
| if (span.name.startsWith('cloud.google.com')) { | ||
| assert.equal( | ||
| span.attributes[SEMATTRS_DB_SYSTEM], | ||
| 'spanner', | ||
| 'Invalid DB_SYSTEM attribute' | ||
| ); | ||
| } | ||
| }); | ||
| }); | ||
| }); |
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