function live() {
var client = new Prometheus();
var logins = client.newCounter({
namespace: "counters",
name: "logins",
help: "Counters"
});
var requests = client.newCounter({
namespace: "counters",
name: "requests",
help: "Counters"
});
var bytes = client.newGauge({
namespace: "gauge",
name: "bytes",
help: "bytes"
});
client.listen(9091);
var data = {};
var bytesCounter = 0;
function randomWalk(labels, variation) {
logins.increment(labels, (Math.random() * variation) - (variation / 2));
requests.increment(labels, 100 + (Math.random() * 10));
bytesCounter++;
bytes.set(labels, bytesCounter);
}
setInterval(function() {
randomWalk({server: "backend-01", app: "backend"}, 2);
randomWalk({server: "backend-02", app: "backend"}, 2);
randomWalk({server: "webserver-01", app: "frontend"}, 2);
randomWalk({server: "webserver-02", app: "frontend"}, 2);
randomWalk({server: "webserver_03", app: "frontend"}, 2);
randomWalk({server: "webserver.03", app: "frontend"}, 2);
}, 10000);
}
var Prometheus = require("prometheus-client");
var metricsClient = new Prometheus();
var memoryGauge = metricsClient.newGauge({
namespace: "memory",
name : "usage",
help : "Memory Usage"
});
var memoryGaugeInterval = setInterval(function() {
var usage = process.memoryUsage();
memoryGauge.set({type: 'rss'}, usage.rss);
memoryGauge.set({type: 'heapTotal'}, usage.heapTotal);
memoryGauge.set({type: 'heapUsed'}, usage.heapUsed);
}, 1000);
module.exports.metrics = {
client: metricsClient,
httpRequestCounter: metricsClient.newCounter({
namespace: "http",
name : "http_requests_total",
help : "The number of http requests received."
}),
httpResponseCounter: metricsClient.newCounter({
namespace: "http",
name : "http_responses_total",
help : "The number of http responses sent."