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prevent all monitors making requests at the same moment when start the server

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LouisLam 2021-08-19 18:33:52 +08:00
parent 64498163e1
commit 30b8d3d0ab
3 changed files with 38 additions and 3 deletions
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7
server/server.js
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@ -1,7 +1,7 @@
console.log("Welcome to Uptime Kuma");
console.log("Node Env: " + process.env.NODE_ENV);
const { sleep, debug, TimeLogger } = require("../src/util");
const { sleep, debug, TimeLogger, getRandomInt } = require("../src/util");
console.log("Importing Node libraries")
const fs = require("fs");
@ -755,8 +755,11 @@ async function startMonitors() {
let list = await R.find("monitor", " active = 1 ")
for (let monitor of list) {
monitor.start(io)
monitor.start(io);
monitorList[monitor.id] = monitor;
// Give some delays, so all monitors won't make request at the same moment when just start the server.
await sleep(getRandomInt(300, 1000));
}
}

12
src/util.js
View file

@ -1,6 +1,6 @@
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.TimeLogger = exports.polyfill = exports.debug = exports.ucfirst = exports.sleep = exports.flipStatus = exports.PENDING = exports.UP = exports.DOWN = exports.appName = exports.isDev = void 0;
exports.getRandomInt = exports.getRandomArbitrary = exports.TimeLogger = exports.polyfill = exports.debug = exports.ucfirst = exports.sleep = exports.flipStatus = exports.PENDING = exports.UP = exports.DOWN = exports.appName = exports.isDev = void 0;
const _dayjs = require("dayjs");
const dayjs = _dayjs;
exports.isDev = process.env.NODE_ENV === "development";
@ -58,3 +58,13 @@ class TimeLogger {
}
}
exports.TimeLogger = TimeLogger;
function getRandomArbitrary(min, max) {
return Math.random() * (max - min) + min;
}
exports.getRandomArbitrary = getRandomArbitrary;
function getRandomInt(min, max) {
min = Math.ceil(min);
max = Math.floor(max);
return Math.floor(Math.random() * (max - min + 1)) + min;
}
exports.getRandomInt = getRandomInt;

22
src/util.ts
View file

@ -81,3 +81,25 @@ export class TimeLogger {
}
}
}
/**
* Returns a random number between min (inclusive) and max (exclusive)
*/
export function getRandomArbitrary(min, max) {
return Math.random() * (max - min) + min;
}
/**
* From: https://stackoverflow.com/questions/1527803/generating-random-whole-numbers-in-javascript-in-a-specific-range
*
* Returns a random integer between min (inclusive) and max (inclusive).
* The value is no lower than min (or the next integer greater than min
* if min isn't an integer) and no greater than max (or the next integer
* lower than max if max isn't an integer).
* Using Math.round() will give you a non-uniform distribution!
*/
export function getRandomInt(min, max) {
min = Math.ceil(min);
max = Math.floor(max);
return Math.floor(Math.random() * (max - min + 1)) + min;
}