the-tip-top-backend/node_modules/prom-client/lib/metrics/processResources.js

58 lines
1.6 KiB
JavaScript
Executable File

'use strict';
const Gauge = require('../gauge');
const { updateMetrics } = require('./helpers/processMetricsHelpers');
const NODEJS_ACTIVE_RESOURCES = 'nodejs_active_resources';
const NODEJS_ACTIVE_RESOURCES_TOTAL = 'nodejs_active_resources_total';
module.exports = (registry, config = {}) => {
// Don't do anything if the function does not exist in previous nodes (exists in node@17.3.0)
if (typeof process.getActiveResourcesInfo !== 'function') {
return;
}
const namePrefix = config.prefix ? config.prefix : '';
const labels = config.labels ? config.labels : {};
const labelNames = Object.keys(labels);
new Gauge({
name: namePrefix + NODEJS_ACTIVE_RESOURCES,
help: 'Number of active resources that are currently keeping the event loop alive, grouped by async resource type.',
labelNames: ['type', ...labelNames],
registers: registry ? [registry] : undefined,
collect() {
const resources = process.getActiveResourcesInfo();
const data = {};
for (let i = 0; i < resources.length; i++) {
const resource = resources[i];
if (Object.hasOwn(data, resource)) {
data[resource] += 1;
} else {
data[resource] = 1;
}
}
updateMetrics(this, data, labels);
},
});
new Gauge({
name: namePrefix + NODEJS_ACTIVE_RESOURCES_TOTAL,
help: 'Total number of active resources.',
registers: registry ? [registry] : undefined,
labelNames,
collect() {
const resources = process.getActiveResourcesInfo();
this.set(labels, resources.length);
},
});
};
module.exports.metricNames = [
NODEJS_ACTIVE_RESOURCES,
NODEJS_ACTIVE_RESOURCES_TOTAL,
];