mirror of https://github.com/louislam/uptime-kuma
815 lines
25 KiB
JavaScript
815 lines
25 KiB
JavaScript
const dayjs = require("dayjs");
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const { UP, MAINTENANCE, DOWN, PENDING } = require("../src/util");
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const { LimitQueue } = require("./utils/limit-queue");
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const { log } = require("../src/util");
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const { R } = require("redbean-node");
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/**
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* Calculates the uptime of a monitor.
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*/
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class UptimeCalculator {
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/**
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* @private
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* @type {{string:UptimeCalculator}}
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*/
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static list = {};
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/**
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* For testing purposes, we can set the current date to a specific date.
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* @type {dayjs.Dayjs}
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*/
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static currentDate = null;
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/**
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* monitorID the id of the monitor
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* @type {number}
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*/
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monitorID;
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/**
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* Recent 24-hour uptime, each item is a 1-minute interval
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* Key: {number} DivisionKey
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* @type {LimitQueue<number,string>}
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*/
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minutelyUptimeDataList = new LimitQueue(24 * 60);
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/**
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* Recent 30-day uptime, each item is a 1-hour interval
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* Key: {number} DivisionKey
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* @type {LimitQueue<number,string>}
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*/
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hourlyUptimeDataList = new LimitQueue(30 * 24);
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/**
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* Daily uptime data,
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* Key: {number} DailyKey
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*/
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dailyUptimeDataList = new LimitQueue(365);
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lastUptimeData = null;
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lastHourlyUptimeData = null;
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lastDailyUptimeData = null;
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lastDailyStatBean = null;
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lastHourlyStatBean = null;
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lastMinutelyStatBean = null;
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/**
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* Get the uptime calculator for a monitor
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* Initializes and returns the monitor if it does not exist
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* @param {number} monitorID the id of the monitor
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* @returns {Promise<UptimeCalculator>} UptimeCalculator
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*/
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static async getUptimeCalculator(monitorID) {
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if (!monitorID) {
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throw new Error("Monitor ID is required");
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}
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if (!UptimeCalculator.list[monitorID]) {
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UptimeCalculator.list[monitorID] = new UptimeCalculator();
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await UptimeCalculator.list[monitorID].init(monitorID);
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}
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return UptimeCalculator.list[monitorID];
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}
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/**
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* Remove a monitor from the list
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* @param {number} monitorID the id of the monitor
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* @returns {Promise<void>}
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*/
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static async remove(monitorID) {
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delete UptimeCalculator.list[monitorID];
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}
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/**
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*
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*/
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constructor() {
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if (process.env.TEST_BACKEND) {
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// Override the getCurrentDate() method to return a specific date
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// Only for testing
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this.getCurrentDate = () => {
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if (UptimeCalculator.currentDate) {
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return UptimeCalculator.currentDate;
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} else {
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return dayjs.utc();
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}
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};
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}
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}
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/**
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* Initialize the uptime calculator for a monitor
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* @param {number} monitorID the id of the monitor
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* @returns {Promise<void>}
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*/
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async init(monitorID) {
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this.monitorID = monitorID;
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let now = this.getCurrentDate();
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// Load minutely data from database (recent 24 hours only)
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let minutelyStatBeans = await R.find("stat_minutely", " monitor_id = ? AND timestamp > ? ORDER BY timestamp", [
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monitorID,
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this.getMinutelyKey(now.subtract(24, "hour")),
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]);
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for (let bean of minutelyStatBeans) {
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let data = {
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up: bean.up,
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down: bean.down,
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avgPing: bean.ping,
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minPing: bean.pingMin,
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maxPing: bean.pingMax,
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};
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if (bean.extras != null) {
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data = {
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...data,
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...JSON.parse(bean.extras),
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};
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}
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let key = bean.timestamp;
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this.minutelyUptimeDataList.push(key, data);
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}
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// Load hourly data from database (recent 30 days only)
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let hourlyStatBeans = await R.find("stat_hourly", " monitor_id = ? AND timestamp > ? ORDER BY timestamp", [
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monitorID,
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this.getHourlyKey(now.subtract(30, "day")),
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]);
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for (let bean of hourlyStatBeans) {
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let data = {
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up: bean.up,
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down: bean.down,
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avgPing: bean.ping,
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minPing: bean.pingMin,
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maxPing: bean.pingMax,
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};
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if (bean.extras != null) {
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data = {
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...data,
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...JSON.parse(bean.extras),
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};
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}
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this.hourlyUptimeDataList.push(bean.timestamp, data);
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}
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// Load daily data from database (recent 365 days only)
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let dailyStatBeans = await R.find("stat_daily", " monitor_id = ? AND timestamp > ? ORDER BY timestamp", [
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monitorID,
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this.getDailyKey(now.subtract(365, "day")),
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]);
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for (let bean of dailyStatBeans) {
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let data = {
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up: bean.up,
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down: bean.down,
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avgPing: bean.ping,
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minPing: bean.pingMin,
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maxPing: bean.pingMax,
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};
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if (bean.extras != null) {
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data = {
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...data,
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...JSON.parse(bean.extras),
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};
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}
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this.dailyUptimeDataList.push(bean.timestamp, data);
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}
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}
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/**
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* @param {number} status status
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* @param {number} ping Ping
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* @returns {dayjs.Dayjs} date
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* @throws {Error} Invalid status
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*/
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async update(status, ping = 0) {
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let date = this.getCurrentDate();
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let flatStatus = this.flatStatus(status);
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if (flatStatus === DOWN && ping > 0) {
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log.warn("uptime-calc", "The ping is not effective when the status is DOWN");
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}
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let divisionKey = this.getMinutelyKey(date);
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let hourlyKey = this.getHourlyKey(date);
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let dailyKey = this.getDailyKey(date);
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let minutelyData = this.minutelyUptimeDataList[divisionKey];
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let hourlyData = this.hourlyUptimeDataList[hourlyKey];
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let dailyData = this.dailyUptimeDataList[dailyKey];
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if (status === MAINTENANCE) {
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minutelyData.maintenance = minutelyData.maintenance ? minutelyData.maintenance + 1 : 1;
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hourlyData.maintenance = hourlyData.maintenance ? hourlyData.maintenance + 1 : 1;
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dailyData.maintenance = dailyData.maintenance ? dailyData.maintenance + 1 : 1;
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} else if (flatStatus === UP) {
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minutelyData.up += 1;
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hourlyData.up += 1;
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dailyData.up += 1;
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// Only UP status can update the ping
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if (!isNaN(ping)) {
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// Add avg ping
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// The first beat of the minute, the ping is the current ping
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if (minutelyData.up === 1) {
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minutelyData.avgPing = ping;
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minutelyData.minPing = ping;
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minutelyData.maxPing = ping;
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} else {
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minutelyData.avgPing = (minutelyData.avgPing * (minutelyData.up - 1) + ping) / minutelyData.up;
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minutelyData.minPing = Math.min(minutelyData.minPing, ping);
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minutelyData.maxPing = Math.max(minutelyData.maxPing, ping);
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}
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// Add avg ping
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// The first beat of the hour, the ping is the current ping
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if (hourlyData.up === 1) {
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hourlyData.avgPing = ping;
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hourlyData.minPing = ping;
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hourlyData.maxPing = ping;
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} else {
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hourlyData.avgPing = (hourlyData.avgPing * (hourlyData.up - 1) + ping) / hourlyData.up;
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hourlyData.minPing = Math.min(hourlyData.minPing, ping);
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hourlyData.maxPing = Math.max(hourlyData.maxPing, ping);
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}
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// Add avg ping (daily)
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// The first beat of the day, the ping is the current ping
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if (dailyData.up === 1) {
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dailyData.avgPing = ping;
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dailyData.minPing = ping;
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dailyData.maxPing = ping;
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} else {
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dailyData.avgPing = (dailyData.avgPing * (dailyData.up - 1) + ping) / dailyData.up;
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dailyData.minPing = Math.min(dailyData.minPing, ping);
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dailyData.maxPing = Math.max(dailyData.maxPing, ping);
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}
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}
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} else if (flatStatus === DOWN) {
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minutelyData.down += 1;
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hourlyData.down += 1;
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dailyData.down += 1;
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}
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if (minutelyData !== this.lastUptimeData) {
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this.lastUptimeData = minutelyData;
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}
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if (hourlyData !== this.lastHourlyUptimeData) {
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this.lastHourlyUptimeData = hourlyData;
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}
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if (dailyData !== this.lastDailyUptimeData) {
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this.lastDailyUptimeData = dailyData;
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}
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// Don't store data in test mode
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if (process.env.TEST_BACKEND) {
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log.debug("uptime-calc", "Skip storing data in test mode");
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return date;
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}
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let dailyStatBean = await this.getDailyStatBean(dailyKey);
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dailyStatBean.up = dailyData.up;
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dailyStatBean.down = dailyData.down;
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dailyStatBean.ping = dailyData.avgPing;
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dailyStatBean.pingMin = dailyData.minPing;
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dailyStatBean.pingMax = dailyData.maxPing;
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{
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// eslint-disable-next-line no-unused-vars
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const { up, down, avgPing, minPing, maxPing, ...extras } = dailyData;
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if (Object.keys(extras).length > 0) {
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dailyStatBean.extras = JSON.stringify(extras);
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}
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}
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await R.store(dailyStatBean);
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let hourlyStatBean = await this.getHourlyStatBean(hourlyKey);
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hourlyStatBean.up = hourlyData.up;
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hourlyStatBean.down = hourlyData.down;
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hourlyStatBean.ping = hourlyData.avgPing;
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hourlyStatBean.pingMin = hourlyData.minPing;
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hourlyStatBean.pingMax = hourlyData.maxPing;
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{
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// eslint-disable-next-line no-unused-vars
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const { up, down, avgPing, minPing, maxPing, ...extras } = hourlyData;
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if (Object.keys(extras).length > 0) {
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hourlyStatBean.extras = JSON.stringify(extras);
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}
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}
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await R.store(hourlyStatBean);
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let minutelyStatBean = await this.getMinutelyStatBean(divisionKey);
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minutelyStatBean.up = minutelyData.up;
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minutelyStatBean.down = minutelyData.down;
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minutelyStatBean.ping = minutelyData.avgPing;
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minutelyStatBean.pingMin = minutelyData.minPing;
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minutelyStatBean.pingMax = minutelyData.maxPing;
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{
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// eslint-disable-next-line no-unused-vars
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const { up, down, avgPing, minPing, maxPing, ...extras } = minutelyData;
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if (Object.keys(extras).length > 0) {
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minutelyStatBean.extras = JSON.stringify(extras);
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}
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}
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await R.store(minutelyStatBean);
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// Remove the old data
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log.debug("uptime-calc", "Remove old data");
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await R.exec("DELETE FROM stat_minutely WHERE monitor_id = ? AND timestamp < ?", [
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this.monitorID,
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this.getMinutelyKey(date.subtract(24, "hour")),
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]);
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await R.exec("DELETE FROM stat_hourly WHERE monitor_id = ? AND timestamp < ?", [
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this.monitorID,
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this.getHourlyKey(date.subtract(30, "day")),
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]);
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return date;
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}
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/**
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* Get the daily stat bean
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* @param {number} timestamp milliseconds
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* @returns {Promise<import("redbean-node").Bean>} stat_daily bean
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*/
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async getDailyStatBean(timestamp) {
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if (this.lastDailyStatBean && this.lastDailyStatBean.timestamp === timestamp) {
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return this.lastDailyStatBean;
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}
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let bean = await R.findOne("stat_daily", " monitor_id = ? AND timestamp = ?", [
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this.monitorID,
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timestamp,
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]);
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if (!bean) {
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bean = R.dispense("stat_daily");
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bean.monitor_id = this.monitorID;
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bean.timestamp = timestamp;
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}
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this.lastDailyStatBean = bean;
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return this.lastDailyStatBean;
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}
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/**
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* Get the hourly stat bean
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* @param {number} timestamp milliseconds
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* @returns {Promise<import("redbean-node").Bean>} stat_hourly bean
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*/
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async getHourlyStatBean(timestamp) {
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if (this.lastHourlyStatBean && this.lastHourlyStatBean.timestamp === timestamp) {
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return this.lastHourlyStatBean;
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}
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let bean = await R.findOne("stat_hourly", " monitor_id = ? AND timestamp = ?", [
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this.monitorID,
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timestamp,
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]);
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if (!bean) {
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bean = R.dispense("stat_hourly");
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bean.monitor_id = this.monitorID;
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bean.timestamp = timestamp;
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}
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this.lastHourlyStatBean = bean;
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return this.lastHourlyStatBean;
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}
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/**
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* Get the minutely stat bean
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* @param {number} timestamp milliseconds
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* @returns {Promise<import("redbean-node").Bean>} stat_minutely bean
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*/
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async getMinutelyStatBean(timestamp) {
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if (this.lastMinutelyStatBean && this.lastMinutelyStatBean.timestamp === timestamp) {
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return this.lastMinutelyStatBean;
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}
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let bean = await R.findOne("stat_minutely", " monitor_id = ? AND timestamp = ?", [
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this.monitorID,
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timestamp,
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]);
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if (!bean) {
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bean = R.dispense("stat_minutely");
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bean.monitor_id = this.monitorID;
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bean.timestamp = timestamp;
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}
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this.lastMinutelyStatBean = bean;
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return this.lastMinutelyStatBean;
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}
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/**
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* Convert timestamp to minutely key
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* @param {dayjs.Dayjs} date The heartbeat date
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* @returns {number} Timestamp
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*/
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getMinutelyKey(date) {
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// Truncate value to minutes (e.g. 2021-01-01 12:34:56 -> 2021-01-01 12:34:00)
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date = date.startOf("minute");
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// Convert to timestamp in second
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let divisionKey = date.unix();
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if (! (divisionKey in this.minutelyUptimeDataList)) {
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this.minutelyUptimeDataList.push(divisionKey, {
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up: 0,
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down: 0,
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avgPing: 0,
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minPing: 0,
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maxPing: 0,
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});
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}
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return divisionKey;
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}
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/**
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* Convert timestamp to hourly key
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* @param {dayjs.Dayjs} date The heartbeat date
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* @returns {number} Timestamp
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*/
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getHourlyKey(date) {
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// Truncate value to hours (e.g. 2021-01-01 12:34:56 -> 2021-01-01 12:00:00)
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date = date.startOf("hour");
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// Convert to timestamp in second
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let divisionKey = date.unix();
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if (! (divisionKey in this.hourlyUptimeDataList)) {
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this.hourlyUptimeDataList.push(divisionKey, {
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up: 0,
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down: 0,
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avgPing: 0,
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minPing: 0,
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maxPing: 0,
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});
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}
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return divisionKey;
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}
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/**
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* Convert timestamp to daily key
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* @param {dayjs.Dayjs} date The heartbeat date
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* @returns {number} Timestamp
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*/
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getDailyKey(date) {
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// Truncate value to start of day (e.g. 2021-01-01 12:34:56 -> 2021-01-01 00:00:00)
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// Considering if the user keep changing could affect the calculation, so use UTC time to avoid this problem.
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date = date.utc().startOf("day");
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let dailyKey = date.unix();
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if (!this.dailyUptimeDataList[dailyKey]) {
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this.dailyUptimeDataList.push(dailyKey, {
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up: 0,
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down: 0,
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avgPing: 0,
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minPing: 0,
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maxPing: 0,
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});
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}
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return dailyKey;
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}
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/**
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* Convert timestamp to key
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* @param {dayjs.Dayjs} datetime Datetime
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* @param {"day" | "hour" | "minute"} type the type of data which is expected to be returned
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* @returns {number} Timestamp
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* @throws {Error} If the type is invalid
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*/
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getKey(datetime, type) {
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switch (type) {
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case "day":
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return this.getDailyKey(datetime);
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case "hour":
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return this.getHourlyKey(datetime);
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case "minute":
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return this.getMinutelyKey(datetime);
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default:
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throw new Error("Invalid type");
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}
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}
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/**
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* Flat status to UP or DOWN
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* @param {number} status the status which should be turned into a flat status
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* @returns {UP|DOWN|PENDING} The flat status
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* @throws {Error} Invalid status
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*/
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flatStatus(status) {
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switch (status) {
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case UP:
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case MAINTENANCE:
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return UP;
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case DOWN:
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case PENDING:
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return DOWN;
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}
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throw new Error("Invalid status");
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}
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/**
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* @param {number} num the number of data points which are expected to be returned
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|
* @param {"day" | "hour" | "minute"} type the type of data which is expected to be returned
|
|
* @returns {UptimeDataResult} UptimeDataResult
|
|
* @throws {Error} The maximum number of minutes greater than 1440
|
|
*/
|
|
getData(num, type = "day") {
|
|
|
|
if (type === "hour" && num > 24 * 30) {
|
|
throw new Error("The maximum number of hours is 720");
|
|
}
|
|
if (type === "minute" && num > 24 * 60) {
|
|
throw new Error("The maximum number of minutes is 1440");
|
|
}
|
|
|
|
// Get the current time period key based on the type
|
|
let key = this.getKey(this.getCurrentDate(), type);
|
|
|
|
let total = {
|
|
up: 0,
|
|
down: 0,
|
|
};
|
|
|
|
let totalPing = 0;
|
|
let endTimestamp;
|
|
|
|
// Get the eariest timestamp of the required period based on the type
|
|
switch (type) {
|
|
case "day":
|
|
endTimestamp = key - 86400 * (num - 1);
|
|
break;
|
|
case "hour":
|
|
endTimestamp = key - 3600 * (num - 1);
|
|
break;
|
|
case "minute":
|
|
endTimestamp = key - 60 * (num - 1);
|
|
break;
|
|
default:
|
|
throw new Error("Invalid type");
|
|
}
|
|
|
|
// Sum up all data in the specified time range
|
|
while (key >= endTimestamp) {
|
|
let data;
|
|
|
|
switch (type) {
|
|
case "day":
|
|
data = this.dailyUptimeDataList[key];
|
|
break;
|
|
case "hour":
|
|
data = this.hourlyUptimeDataList[key];
|
|
break;
|
|
case "minute":
|
|
data = this.minutelyUptimeDataList[key];
|
|
break;
|
|
default:
|
|
throw new Error("Invalid type");
|
|
}
|
|
|
|
if (data) {
|
|
total.up += data.up;
|
|
total.down += data.down;
|
|
totalPing += data.avgPing * data.up;
|
|
}
|
|
|
|
// Set key to the previous time period
|
|
switch (type) {
|
|
case "day":
|
|
key -= 86400;
|
|
break;
|
|
case "hour":
|
|
key -= 3600;
|
|
break;
|
|
case "minute":
|
|
key -= 60;
|
|
break;
|
|
default:
|
|
throw new Error("Invalid type");
|
|
}
|
|
}
|
|
|
|
let uptimeData = new UptimeDataResult();
|
|
|
|
// If there is no data in the previous time ranges, use the last data?
|
|
if (total.up === 0 && total.down === 0) {
|
|
switch (type) {
|
|
case "day":
|
|
if (this.lastDailyUptimeData) {
|
|
total = this.lastDailyUptimeData;
|
|
totalPing = total.avgPing * total.up;
|
|
} else {
|
|
return uptimeData;
|
|
}
|
|
break;
|
|
case "hour":
|
|
if (this.lastHourlyUptimeData) {
|
|
total = this.lastHourlyUptimeData;
|
|
totalPing = total.avgPing * total.up;
|
|
} else {
|
|
return uptimeData;
|
|
}
|
|
break;
|
|
case "minute":
|
|
if (this.lastUptimeData) {
|
|
total = this.lastUptimeData;
|
|
totalPing = total.avgPing * total.up;
|
|
} else {
|
|
return uptimeData;
|
|
}
|
|
break;
|
|
default:
|
|
throw new Error("Invalid type");
|
|
}
|
|
}
|
|
|
|
let avgPing;
|
|
|
|
if (total.up === 0) {
|
|
avgPing = null;
|
|
} else {
|
|
avgPing = totalPing / total.up;
|
|
}
|
|
|
|
if (total.up + total.down === 0) {
|
|
uptimeData.uptime = 0;
|
|
} else {
|
|
uptimeData.uptime = total.up / (total.up + total.down);
|
|
}
|
|
uptimeData.avgPing = avgPing;
|
|
return uptimeData;
|
|
}
|
|
|
|
/**
|
|
* Get data in form of an array
|
|
* @param {number} num the number of data points which are expected to be returned
|
|
* @param {"day" | "hour" | "minute"} type the type of data which is expected to be returned
|
|
* @returns {Array<object>} uptime data
|
|
* @throws {Error} The maximum number of minutes greater than 1440
|
|
*/
|
|
getDataArray(num, type = "day") {
|
|
if (type === "hour" && num > 24 * 30) {
|
|
throw new Error("The maximum number of hours is 720");
|
|
}
|
|
if (type === "minute" && num > 24 * 60) {
|
|
throw new Error("The maximum number of minutes is 1440");
|
|
}
|
|
|
|
// Get the current time period key based on the type
|
|
let key = this.getKey(this.getCurrentDate(), type);
|
|
|
|
let result = [];
|
|
|
|
let endTimestamp;
|
|
|
|
// Get the eariest timestamp of the required period based on the type
|
|
switch (type) {
|
|
case "day":
|
|
endTimestamp = key - 86400 * (num - 1);
|
|
break;
|
|
case "hour":
|
|
endTimestamp = key - 3600 * (num - 1);
|
|
break;
|
|
case "minute":
|
|
endTimestamp = key - 60 * (num - 1);
|
|
break;
|
|
default:
|
|
throw new Error("Invalid type");
|
|
}
|
|
|
|
// Get datapoints in the specified time range
|
|
while (key >= endTimestamp) {
|
|
let data;
|
|
|
|
switch (type) {
|
|
case "day":
|
|
data = this.dailyUptimeDataList[key];
|
|
break;
|
|
case "hour":
|
|
data = this.hourlyUptimeDataList[key];
|
|
break;
|
|
case "minute":
|
|
data = this.minutelyUptimeDataList[key];
|
|
break;
|
|
default:
|
|
throw new Error("Invalid type");
|
|
}
|
|
|
|
if (data) {
|
|
data.timestamp = key;
|
|
result.push(data);
|
|
}
|
|
|
|
// Set key to the previous time period
|
|
switch (type) {
|
|
case "day":
|
|
key -= 86400;
|
|
break;
|
|
case "hour":
|
|
key -= 3600;
|
|
break;
|
|
case "minute":
|
|
key -= 60;
|
|
break;
|
|
default:
|
|
throw new Error("Invalid type");
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* Get the uptime data by duration
|
|
* @param {'24h'|'30d'|'1y'} duration Only accept 24h, 30d, 1y
|
|
* @returns {UptimeDataResult} UptimeDataResult
|
|
* @throws {Error} Invalid duration
|
|
*/
|
|
getDataByDuration(duration) {
|
|
if (duration === "24h") {
|
|
return this.get24Hour();
|
|
} else if (duration === "30d") {
|
|
return this.get30Day();
|
|
} else if (duration === "1y") {
|
|
return this.get1Year();
|
|
} else {
|
|
throw new Error("Invalid duration");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 1440 = 24 * 60mins
|
|
* @returns {UptimeDataResult} UptimeDataResult
|
|
*/
|
|
get24Hour() {
|
|
return this.getData(1440, "minute");
|
|
}
|
|
|
|
/**
|
|
* @returns {UptimeDataResult} UptimeDataResult
|
|
*/
|
|
get7Day() {
|
|
return this.getData(168, "hour");
|
|
}
|
|
|
|
/**
|
|
* @returns {UptimeDataResult} UptimeDataResult
|
|
*/
|
|
get30Day() {
|
|
return this.getData(30);
|
|
}
|
|
|
|
/**
|
|
* @returns {UptimeDataResult} UptimeDataResult
|
|
*/
|
|
get1Year() {
|
|
return this.getData(365);
|
|
}
|
|
|
|
/**
|
|
* @returns {dayjs.Dayjs} Current datetime in UTC
|
|
*/
|
|
getCurrentDate() {
|
|
return dayjs.utc();
|
|
}
|
|
|
|
}
|
|
|
|
class UptimeDataResult {
|
|
/**
|
|
* @type {number} Uptime
|
|
*/
|
|
uptime = 0;
|
|
|
|
/**
|
|
* @type {number} Average ping
|
|
*/
|
|
avgPing = null;
|
|
}
|
|
|
|
module.exports = {
|
|
UptimeCalculator,
|
|
UptimeDataResult,
|
|
};
|