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273 lines
7.9 KiB
273 lines
7.9 KiB
import { getNotifier, AnalyticMeta, WebhookType, Notification, MetaInfo } from './notification_service'; |
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import * as AnalyticUnit from '../models/analytic_units'; |
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import { Segment } from '../models/segment_model'; |
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import { availableReporter } from '../utils/reporter'; |
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import { toTimeZone } from '../utils/time'; |
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import { ORG_ID, HASTIC_API_KEY, HASTIC_ALERT_IMAGE } from '../config'; |
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import axios from 'axios'; |
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import * as _ from 'lodash'; |
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const Notifier = getNotifier(); |
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export class Alert { |
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public enabled = true; |
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constructor(protected analyticUnit: AnalyticUnit.AnalyticUnit) {}; |
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public receive(segment: Segment) { |
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if(this.enabled) { |
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this.send(segment); |
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} |
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}; |
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protected async send(segment) { |
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const notification = await this.makeNotification(segment); |
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try { |
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await Notifier.sendNotification(notification); |
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} catch(error) { |
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console.error(`can't send notification ${error}`); |
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}; |
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} |
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protected async makeNotification(segment: Segment): Promise<Notification> { |
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const meta = this.makeMeta(segment); |
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const text = this.makeMessage(meta); |
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let result: Notification = { meta, text }; |
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if(HASTIC_ALERT_IMAGE) { |
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try { |
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const image = await this.loadImage(); |
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result.image = image; |
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} catch(err) { |
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console.error(`Can't load alert image: ${err}. Check that API key has admin permissions`); |
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} |
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} |
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return result; |
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} |
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protected async loadImage() { |
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const headers = { Authorization: `Bearer ${HASTIC_API_KEY}` }; |
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const dashdoardId = this.analyticUnit.panelId.split('/')[0]; |
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const panelId = this.analyticUnit.panelId.split('/')[1]; |
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const dashboardApiURL = `${this.analyticUnit.grafanaUrl}/api/dashboards/uid/${dashdoardId}`; |
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const dashboardInfo: any = await axios.get(dashboardApiURL, { headers }); |
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const dashboardName = _.last(dashboardInfo.data.meta.url.split('/')); |
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const renderUrl = `${this.analyticUnit.grafanaUrl}/render/d-solo/${dashdoardId}/${dashboardName}`; |
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const params = { |
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panelId, |
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ordId: ORG_ID, |
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apiRendering: true, |
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analyticUnitId: this.analyticUnit.id |
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}; |
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const response = await axios.get(renderUrl, { |
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params, |
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headers, |
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responseType: 'arraybuffer' |
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}); |
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return new Buffer(response.data, 'binary').toString('base64'); |
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} |
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protected makeMeta(segment: Segment): AnalyticMeta { |
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const dashdoardId = this.analyticUnit.panelId.split('/')[0]; |
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const panelId = this.analyticUnit.panelId.split('/')[1]; |
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const grafanaUrl = `${this.analyticUnit.grafanaUrl}/d/${dashdoardId}?panelId=${panelId}&edit=true&fullscreen=true?orgId=${ORG_ID}`; |
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let alert: AnalyticMeta = { |
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type: WebhookType.DETECT, |
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analyticUnitType: this.analyticUnit.type, |
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analyticUnitName: this.analyticUnit.name, |
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analyticUnitId: this.analyticUnit.id, |
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grafanaUrl, |
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from: segment.from, |
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to: segment.to, |
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message: segment.message |
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}; |
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return alert; |
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} |
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protected makeMessage(meta: AnalyticMeta): string { |
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const localTimeFrom = toTimeZone(meta.from); |
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const localTimeTo = toTimeZone(meta.to); |
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return [ |
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`[${meta.analyticUnitType.toUpperCase()} ALERTING] ${meta.analyticUnitName}`, |
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`URL: ${meta.grafanaUrl}`, |
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``, |
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`From: ${localTimeFrom}`, |
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`To: ${localTimeTo}`, |
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`ID: ${meta.analyticUnitId}`, |
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`Message: ${meta.message}` |
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].join('\n'); |
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} |
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} |
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class PatternAlert extends Alert { |
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private lastSentSegment: Segment; |
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public receive(segment: Segment) { |
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if(this.lastSentSegment === undefined || !segment.equals(this.lastSentSegment) ) { |
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this.lastSentSegment = segment; |
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if(this.enabled) { |
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this.send(segment); |
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} |
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} |
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} |
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protected makeMessage(meta: AnalyticMeta): string { |
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const localTimeFrom = toTimeZone(meta.from); |
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const localTimeTo = toTimeZone(meta.to); |
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return [ |
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`[PATTERN DETECTED] ${meta.analyticUnitName}`, |
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`URL: ${meta.grafanaUrl}`, |
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``, |
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`From: ${localTimeFrom}`, |
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`To: ${localTimeTo}`, |
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`ID: ${meta.analyticUnitId}` |
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].join('\n'); |
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} |
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}; |
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class ThresholdAlert extends Alert { |
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// TODO: configure threshold timing in panel like Grafana's alerts (`evaluate` time, `for` time) |
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// TODO: make events for start and end of threshold |
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EXPIRE_PERIOD_MS = 60000; |
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lastOccurence = 0; |
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public receive(segment: Segment) { |
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if(this.lastOccurence === 0) { |
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this.lastOccurence = segment.from; |
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if(this.enabled) { |
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this.send(segment); |
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} |
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} else { |
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if(segment.from - this.lastOccurence > this.EXPIRE_PERIOD_MS) { |
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if(this.enabled) { |
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console.log(`time between threshold occurences ${segment.from - this.lastOccurence}ms, send alert`); |
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this.send(segment); |
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} |
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} |
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this.lastOccurence = segment.from; |
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} |
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} |
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protected makeMessage(meta: AnalyticMeta): string { |
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const localTimeFrom = toTimeZone(meta.from); |
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let message = [ |
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`[THRESHOLD ALERTING] ${meta.analyticUnitName}`, |
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`URL: ${meta.grafanaUrl}`, |
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``, |
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`Starts at: ${localTimeFrom}`, |
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`ID: ${meta.analyticUnitId}` |
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].join('\n'); |
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if(meta.message !== undefined) { |
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message += meta.message; |
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} |
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return message; |
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} |
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} |
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export class AlertService { |
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// TODO: object -> Map |
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private _alerts: { [id: string]: Alert }; |
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private _alertingEnable: boolean; |
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private _grafanaAvailableReporter: Function; |
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private _datasourceAvailableReporters: Map<string, Function>; |
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constructor() { |
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this._alerts = {}; |
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this._datasourceAvailableReporters = new Map(); |
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this._grafanaAvailableReporter = availableReporter( |
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['[OK] Grafana available', WebhookType.RECOVERY], |
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['[FAILURE] Grafana unavailable for pulling data', WebhookType.FAILURE], |
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this.sendMessage, |
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this.sendMessage |
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); |
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} |
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public receiveAlert(analyticUnit: AnalyticUnit.AnalyticUnit, segment: Segment) { |
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if(!this._alertingEnable) { |
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return; |
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} |
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let id = analyticUnit.id; |
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if(!_.has(this._alerts, id)) { |
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this.addAnalyticUnit(analyticUnit); |
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} |
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this._alerts[id].receive(segment); |
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}; |
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public sendMessage(text: string, type: WebhookType, optionalInfo = {}) { |
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const now = Date.now(); |
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const infoAlert: MetaInfo = { |
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params: optionalInfo, |
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type, |
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from: now, |
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to: now |
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} |
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Notifier.sendNotification({ text, meta: infoAlert }).catch((err) => { |
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console.error(`can't send message ${err.message}`); |
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}); |
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} |
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public sendGrafanaAvailableWebhook() { |
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this._grafanaAvailableReporter(true); |
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} |
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public sendGrafanaUnavailableWebhook() { |
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this._grafanaAvailableReporter(false); |
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} |
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public sendDatasourceAvailableWebhook(url: string) { |
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const reporter = this._getDatasourceAvailableReporter(url); |
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reporter(true); |
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} |
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public sendDatasourceUnavailableWebhook(url: string) { |
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const reporter = this._getDatasourceAvailableReporter(url); |
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reporter(false); |
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} |
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public addAnalyticUnit(analyticUnit: AnalyticUnit.AnalyticUnit) { |
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let alertsType = {}; |
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alertsType[AnalyticUnit.DetectorType.THRESHOLD] = ThresholdAlert; |
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alertsType[AnalyticUnit.DetectorType.PATTERN] = PatternAlert; |
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alertsType[AnalyticUnit.DetectorType.ANOMALY] = Alert; |
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this._alerts[analyticUnit.id] = new alertsType[analyticUnit.detectorType](analyticUnit); |
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} |
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public removeAnalyticUnit(analyticUnitId: AnalyticUnit.AnalyticUnitId) { |
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delete this._alerts[analyticUnitId]; |
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} |
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public stopAlerting() { |
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this._alertingEnable = false; |
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} |
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public startAlerting() { |
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this._alertingEnable = true; |
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} |
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private _getDatasourceAvailableReporter(url: string) { |
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if(!_.has(this._datasourceAvailableReporters, url)) { |
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this._datasourceAvailableReporters[url] = availableReporter( |
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[`[OK] Datasource ${url} available`, WebhookType.RECOVERY], |
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[`[FAILURE] Datasource ${url} unavailable`, WebhookType.FAILURE], |
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this.sendMessage, |
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this.sendMessage |
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); |
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} |
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return this._datasourceAvailableReporters[url]; |
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} |
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}
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