Function routeHandler

lib/utilities/monitoringHandler.js:222–242

(req, res, cb)

    registry.clusterMetrics.bind(registry) : registry.metrics.bind(registry);

async function routeHandler(req, res, cb) {
    if (req.method !== 'GET') {
        return cb(errors.BadRequest, []);
    }
    let promMetrics;
    try {
        // Catch timeout on IPC between worker and primary
        // prom-client has a 5s hardcoded timeout
        promMetrics = await getMetrics();
    } catch (err) {
        return cb(err, { message: err.toString() });
    }

    const contentLen = Buffer.byteLength(promMetrics, 'utf8');
    res.writeHead(200, {
        'Content-Length': contentLen,
        'Content-Type': registry.contentType,
    });
    res.end(promMetrics);
    return undefined;
}

/**
 * Checks if client IP address is allowed to make http request to