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26 lines
725 B
26 lines
725 B
import { collectDefaultMetrics, register } from 'prom-client';
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import http from 'http';
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const reqListener = (req: http.IncomingMessage, res: http.ServerResponse) => {
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register.metrics().then((metrics) => {
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res.writeHead(200, { 'Content-Type': register.contentType });
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res.end(metrics);
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}).catch((e) => {
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res.writeHead(500);
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res.end(e.message);
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});
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};
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export function runPrometheusExporter(port: number) {
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collectDefaultMetrics();
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if (isNaN(port)) {
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throw new Error(`Invalid port: ${process.env.GRIST_PROMCLIENT_PORT}`);
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}
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const server = http.createServer(reqListener);
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server.listen(port, '0.0.0.0');
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console.log(`Prometheus exporter listening on port ${port}.`);
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return server;
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}
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