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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 | 8x 8x 8x 8x 8x 19x 19x 19x 19x 15x 15x 15x 12x 3x 2x 8x 12x 6x 12x 12x 8x 6x 6x 5x 6x 8x 6x 6x 8x 10x 2x 2x 8x | import { Injectable } from '@angular/core';
import * as _ from 'lodash';
import { PrometheusService } from '../api/prometheus.service';
import { AlertmanagerAlert, PrometheusCustomAlert } from '../models/prometheus-alerts';
import { PrometheusAlertFormatter } from './prometheus-alert-formatter';
@Injectable({
providedIn: 'root'
})
export class PrometheusAlertService {
private canAlertsBeNotified = false;
alerts: AlertmanagerAlert[] = [];
constructor(
private alertFormatter: PrometheusAlertFormatter,
private prometheusService: PrometheusService
) {}
refresh() {
this.prometheusService.ifAlertmanagerConfigured(() => {
this.prometheusService.getAlerts().subscribe(
(alerts) => this.handleAlerts(alerts),
(resp) => {
if ([404, 504].includes(resp.status)) {
this.prometheusService.disableAlertmanagerConfig();
}
}
);
});
}
private handleAlerts(alerts: AlertmanagerAlert[]) {
if (this.canAlertsBeNotified) {
this.notifyOnAlertChanges(alerts, this.alerts);
}
this.alerts = alerts;
this.canAlertsBeNotified = true;
}
private notifyOnAlertChanges(alerts: AlertmanagerAlert[], oldAlerts: AlertmanagerAlert[]) {
const changedAlerts = this.getChangedAlerts(
this.alertFormatter.convertToCustomAlerts(alerts),
this.alertFormatter.convertToCustomAlerts(oldAlerts)
);
const notifications = changedAlerts.map((alert) =>
this.alertFormatter.convertAlertToNotification(alert)
);
this.alertFormatter.sendNotifications(notifications);
}
private getChangedAlerts(alerts: PrometheusCustomAlert[], oldAlerts: PrometheusCustomAlert[]) {
const updatedAndNew = _.differenceWith(alerts, oldAlerts, _.isEqual);
return updatedAndNew.concat(this.getVanishedAlerts(alerts, oldAlerts));
}
private getVanishedAlerts(alerts: PrometheusCustomAlert[], oldAlerts: PrometheusCustomAlert[]) {
return _.differenceWith(oldAlerts, alerts, (a, b) => a.fingerprint === b.fingerprint).map(
(alert) => {
alert.status = 'resolved';
return alert;
}
);
}
}
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