mrmBot-Matrix/utils/services/prometheus.js
samhza 833ac924d5
fix prometheus metric names (#142)
> A metric name should have a (single-word) application prefix relevant to the
> domain the metric belongs to.
https://prometheus.io/docs/practices/naming/
2021-07-14 18:42:19 -05:00

57 lines
2 KiB
JavaScript

const { BaseServiceWorker } = require("eris-fleet");
const http = require("http");
const logger = require("../logger.js");
const database = require("../database.js");
class PrometheusWorker extends BaseServiceWorker {
constructor(setup) {
super(setup);
if (process.env.METRICS !== "" && process.env.METRICS !== undefined) {
this.httpServer = http.createServer(async (req, res) => {
if (req.method !== "GET") {
res.statusCode = 405;
return res.end("GET only");
}
res.write(`# HELP esmbot_command_count Number of times a command has been run
# TYPE esmbot_command_count counter
`);
if (process.env.API === "true") {
const servers = await this.ipc.command("image", { type: "stats" }, true);
res.write(`# HELP esmbot_connected_workers Number of workers connected
# TYPE esmbot_connected_workers gauge
esmbot_connected_workers ${servers.length}
# HELP esmbot_running_jobs Number of running jobs on this worker
# TYPE esmbot_running_jobs gauge
# HELP esmbot_queued_jobs Number of queued jobs on this worker
# TYPE esmbot_queued_jobs gauge
# HELP esmbot_max_jobs Number of max allowed jobs on this worker
# TYPE esmbot_max_jobs gauge
`);
for (const [i, w] of servers.entries()) {
res.write(`esmbot_running_jobs{worker="${i}"} ${w.runningJobs}\n`);
res.write(`esmbot_queued_jobs{worker="${i}"} ${w.queued}\n`);
res.write(`esmbot_max_jobs{worker="${i}"} ${w.max}\n`);
}
}
const counts = await database.getCounts();
for (const [i, w] of Object.entries(counts)) {
res.write(`esmbot_command_count{command="${i}"} ${w}\n`);
}
res.end();
});
this.httpServer.listen(process.env.METRICS, () => {
logger.log("info", `Serving metrics at ${process.env.METRICS}`);
});
}
this.serviceReady();
}
shutdown(done) {
this.httpServer.close();
done();
}
}
module.exports = PrometheusWorker;