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feat(core): Add Prometheus metrics for n8n events and api invocations (experimental) (#5177)

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* create prometheus metrics from events

* feat(core): Add more Prometheus metrics (experimental) (#5187)

* refactor(core): Add Prometheus labels to relevant metrics

* feat(core): Add more Prometheus metrics (experimental)

* add 'v' prefix to value of version label

Co-authored-by: Cornelius Suermann <cornelius@n8n.io>
This commit is contained in:
Michael Auerswald
2023-01-19 12:11:31 +01:00
committed by GitHub
parent 4ebf40c7a2
commit 9b032d68bc
11 changed files with 257 additions and 24 deletions
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23
packages/cli/src/Server.ts
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@@ -73,7 +73,6 @@ import jwt from 'jsonwebtoken';
import jwks from 'jwks-rsa';
// @ts-ignore
import timezones from 'google-timezones-json';
import promClient, { Registry } from 'prom-client';
import history from 'connect-history-api-fallback';
import config from '@/config';
@@ -154,6 +153,7 @@ import { licenseController } from './license/license.controller';
import { corsMiddleware } from './middlewares/cors';
import { initEvents } from './events';
import { AbstractServer } from './AbstractServer';
import { configureMetrics } from './metrics';
const exec = promisify(callbackExec);
@@ -321,15 +321,7 @@ class Server extends AbstractServer {
}
async configure(): Promise<void> {
const enableMetrics = config.getEnv('endpoints.metrics.enable');
let register: Registry;
if (enableMetrics) {
const prefix = config.getEnv('endpoints.metrics.prefix');
register = new promClient.Registry();
register.setDefaultLabels({ prefix });
promClient.collectDefaultMetrics({ register });
}
configureMetrics(this.app);
this.frontendSettings.isNpmAvailable = await exec('npm --version')
.then(() => true)
@@ -590,17 +582,6 @@ class Server extends AbstractServer {
this.app.use(`/${this.restEndpoint}/nodes`, nodesController);
}
// ----------------------------------------
// Metrics
// ----------------------------------------
if (enableMetrics) {
this.app.get('/metrics', async (req: express.Request, res: express.Response) => {
const response = await register.metrics();
res.setHeader('Content-Type', register.contentType);
ResponseHelper.sendSuccessResponse(res, response, true, 200);
});
}
// ----------------------------------------
// Workflow
// ----------------------------------------