skynet-webportal/packages/health-check/src/schedule.js

const schedule = require("node-schedule");
const db = require("./db");
const { criticalChecks } = require("./checks/critical");
const { verboseChecks } = require("./checks/verbose");

// execute the critical health-check script every 5 minutes
const criticalJob = schedule.scheduleJob("*/5 * * * *", async () => {
  const entry = { date: new Date().toISOString(), checks: [] };

  entry.checks = await Promise.all(criticalChecks.map((check) => new Promise(check)));

  db.get("critical").push(entry).write();
});

// execute the verbose health-check script once per hour
const verboseJob = schedule.scheduleJob("0 * * * *", async () => {
  const entry = { date: new Date().toISOString(), checks: [] };

  entry.checks = await Promise.all(verboseChecks.map((check) => new Promise(check)));

  db.get("verbose").push(entry).write();
});

// Launch Health check jobs
setTimeout(() => {
  criticalJob.invoke();
  verboseJob.invoke();
}, 60 * 0); // delay for 60s to give other services time to start up