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feat(instrumentation-grpc): set net.peer.name and net.peer.port on client spans #3430

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Dec 5, 2022
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feat(instrumentation-grpc): set net.peer.name and net.peer.port on client spans #3430

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1 change: 1 addition & 0 deletions CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,7 @@ For experimental package changes, see the [experimental CHANGELOG](experimental/
### :rocket: (Enhancement)

* feat(api): add `getActiveBaggage` API [#3385](https://github.com/open-telemetry/opentelemetry-js/pull/3385)
* feat(instrumentation-grpc): set net.peer.name and net.peer.port on client spans [#3430](https://github.com/open-telemetry/opentelemetry-js/pull/3430)

### :bug: (Bug Fix)

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14 changes: 13 additions & 1 deletion experimental/packages/opentelemetry-instrumentation-grpc/src/grpc-js/index.ts
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Expand Up @@ -49,7 +49,7 @@ import {
getMetadata,
} from './clientUtils';
import { EventEmitter } from 'events';
import { _extractMethodAndService, metadataCapture } from '../utils';
import { _extractMethodAndService, metadataCapture, URI_REGEX } from '../utils';
import { AttributeValues } from '../enums/AttributeValues';
import { SemanticAttributes } from '@opentelemetry/semantic-conventions';

Expand Down Expand Up @@ -309,6 +309,18 @@ export class GrpcJsInstrumentation extends InstrumentationBase {
[SemanticAttributes.RPC_METHOD]: method,
[SemanticAttributes.RPC_SERVICE]: service,
});
// set net.peer.* from target (e.g., "dns:otel-productcatalogservice:8080") as a hint to APMs
const parsedUri = URI_REGEX.exec(this.getChannel().getTarget());
if (parsedUri != null && parsedUri.groups != null) {
span.setAttribute(
SemanticAttributes.NET_PEER_NAME,
parsedUri.groups['name']
);
span.setAttribute(
SemanticAttributes.NET_PEER_PORT,
parseInt(parsedUri.groups['port'])
);
}

instrumentation._metadataCapture.client.captureRequestMetadata(
span,
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13 changes: 13 additions & 0 deletions experimental/packages/opentelemetry-instrumentation-grpc/src/grpc/index.ts
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Expand Up @@ -45,6 +45,7 @@ import {
_extractMethodAndService,
_methodIsIgnored,
metadataCapture,
URI_REGEX,
} from '../utils';
import { SemanticAttributes } from '@opentelemetry/semantic-conventions';
import { AttributeValues } from '../enums/AttributeValues';
Expand Down Expand Up @@ -321,6 +322,18 @@ export class GrpcNativeInstrumentation extends InstrumentationBase<
[SemanticAttributes.RPC_METHOD]: method,
[SemanticAttributes.RPC_SERVICE]: service,
});
// set net.peer.* from target (e.g., "dns:otel-productcatalogservice:8080") as a hint to APMs
const parsedUri = URI_REGEX.exec(this.getChannel().getTarget());
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The specification defines that peer.service:

SHOULD be equal to the actual service.name resource attribute of the remote service if any.

Channel#getTarget returns the address that this client is connected to, rather than the desired service.name.

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haha - I agree! I was looking at values in flight from some service which happen to set it to host:port. I'll adjust. Thank you for the reference.

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@ty-elastic ty-elastic Nov 22, 2022 •
edited
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Lemme see how other auto-instrumentation frameworks set this.

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@legendecas - ok, I've change this to set net.peer.name and net.peer.port per OTEL RPC conventions.

Per this, we always set net.peer.name regardless of whether is a DNS name or IP: "Sometimes host name is only available to instrumentation as a string which may contain DNS name or IP address. net.peer.name SHOULD be set to the available known hostname (e.g., "127.0.0.1" if connecting to an URL https://127.0.0.1.com/foo)."

if (parsedUri != null && parsedUri.groups != null) {
span.setAttribute(
SemanticAttributes.NET_PEER_NAME,
parsedUri.groups['name']
);
span.setAttribute(
SemanticAttributes.NET_PEER_PORT,
parseInt(parsedUri.groups['port'])
);
}

instrumentation._metadataCapture.client.captureRequestMetadata(
span,
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4 changes: 4 additions & 0 deletions experimental/packages/opentelemetry-instrumentation-grpc/src/utils.ts
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Expand Up @@ -19,6 +19,10 @@ import type * as grpcTypes from 'grpc';
import type * as grpcJsTypes from '@grpc/grpc-js';
import { IgnoreMatcher } from './types';

// e.g., "dns:otel-productcatalogservice:8080" or "otel-productcatalogservice:8080" or "127.0.0.1:8080"
export const URI_REGEX =
/(?:([A-Za-z0-9+.-]+):(?:\/\/)?)?(?<name>[A-Za-z0-9+.-]+):(?<port>[0-9+.-]+)$/;

// Equivalent to lodash _.findIndex
export const findIndex: <T>(args: T[], fn: (arg: T) => boolean) => number = (
args,
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6 changes: 6 additions & 0 deletions experimental/packages/opentelemetry-instrumentation-grpc/test/helper.ts
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Expand Up @@ -515,6 +515,8 @@ export const runTests = (
const validations = {
name: `grpc.pkg_test.GrpcTester/${methodName}`,
status: grpc.status.OK,
netPeerName: 'localhost',
netPeerPort: grpcPort,
};

assertSpan(moduleName, serverSpan, SpanKind.SERVER, validations);
Expand Down Expand Up @@ -699,6 +701,8 @@ export const runTests = (
const validations = {
name: `grpc.pkg_test.GrpcTester/${method.methodName}`,
status: errorCode,
netPeerName: 'localhost',
netPeerPort: grpcPort,
};
const serverRoot = spans[0];
const clientRoot = spans[1];
Expand Down Expand Up @@ -738,6 +742,8 @@ export const runTests = (
const validations = {
name: `grpc.pkg_test.GrpcTester/${method.methodName}`,
status: errorCode,
netPeerName: 'localhost',
netPeerPort: grpcPort,
};
assertSpan(moduleName, serverSpan, SpanKind.SERVER, validations);
assertSpan(moduleName, clientSpan, SpanKind.CLIENT, validations);
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22 changes: 21 additions & 1 deletion experimental/packages/opentelemetry-instrumentation-grpc/test/utils/assertionUtils.ts
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Expand Up @@ -38,7 +38,12 @@ export const assertSpan = (
component: string,
span: ReadableSpan,
kind: SpanKind,
validations: { name: string; status: grpc.status | grpcJs.status }
validations: {
name: string;
status: grpc.status | grpcJs.status;
netPeerName?: string;
netPeerPort?: number;
}
) => {
assert.strictEqual(span.spanContext().traceId.length, 32);
assert.strictEqual(span.spanContext().spanId.length, 16);
Expand All @@ -56,6 +61,21 @@ export const assertSpan = (
assert.ok(span.spanContext());
}

if (
span.kind === SpanKind.CLIENT &&
validations.netPeerName !== undefined &&
validations.netPeerPort !== undefined
) {
assert.strictEqual(
span.attributes[SemanticAttributes.NET_PEER_NAME],
validations.netPeerName
);
assert.strictEqual(
span.attributes[SemanticAttributes.NET_PEER_PORT],
validations.netPeerPort
);
}

// validations
assert.strictEqual(span.name, validations.name);
assert.strictEqual(
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