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https://github.com/louislam/uptime-kuma.git
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Extend Prometheus Labels to include tags (requires restart for NEW labels on the monitor to be visible) (#4704)
Co-authored-by: Frank Elsinga <frank@elsinga.de>
This commit is contained in:
Thomas Spalinger
GitHub
parent
2a820ab16d
commit
643d28cebc
@ -336,7 +336,7 @@ class Monitor extends BeanModel {
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let previousBeat = null;
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let retries = 0;
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this.prometheus = new Prometheus(this);
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this.prometheus = await Prometheus.createAndInitMetrics(this);
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const beat = async () => {
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@ -980,7 +980,7 @@ class Monitor extends BeanModel {
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await R.store(bean);
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log.debug("monitor", `[${this.name}] prometheus.update`);
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this.prometheus?.update(bean, tlsInfo);
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await this.prometheus?.update(bean, tlsInfo);
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previousBeat = bean;
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@ -1,3 +1,4 @@
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const { R } = require("redbean-node");
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const PrometheusClient = require("prom-client");
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const { log } = require("../src/util");
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@ -9,36 +10,102 @@ const commonLabels = [
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"monitor_port",
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];
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const monitorCertDaysRemaining = new PrometheusClient.Gauge({
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name: "monitor_cert_days_remaining",
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help: "The number of days remaining until the certificate expires",
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labelNames: commonLabels
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});
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const monitorCertIsValid = new PrometheusClient.Gauge({
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name: "monitor_cert_is_valid",
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help: "Is the certificate still valid? (1 = Yes, 0= No)",
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labelNames: commonLabels
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});
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const monitorResponseTime = new PrometheusClient.Gauge({
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name: "monitor_response_time",
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help: "Monitor Response Time (ms)",
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labelNames: commonLabels
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});
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const monitorStatus = new PrometheusClient.Gauge({
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name: "monitor_status",
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help: "Monitor Status (1 = UP, 0= DOWN, 2= PENDING, 3= MAINTENANCE)",
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labelNames: commonLabels
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});
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class Prometheus {
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monitorLabelValues = {};
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/**
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* @param {object} monitor Monitor object to monitor
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* Metric: monitor_cert_days_remaining
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* @type {PrometheusClient.Gauge<string> | null}
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*/
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constructor(monitor) {
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static monitorCertDaysRemaining = null;
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/**
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* Metric: monitor_cert_is_valid
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* @type {PrometheusClient.Gauge<string> | null}
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*/
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static monitorCertIsValid = null;
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/**
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* Metric: monitor_response_time
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* @type {PrometheusClient.Gauge<string> | null}
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*/
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static monitorResponseTime = null;
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/**
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* Metric: monitor_status
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* @type {PrometheusClient.Gauge<string> | null}
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*/
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static monitorStatus = null;
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/**
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* All registered metric labels.
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* @type {string[] | null}
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*/
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static monitorLabelNames = null;
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/**
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* Monitor labels/values combination.
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* @type {{}}
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*/
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monitorLabelValues;
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/**
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* Initialize metrics and get all label names the first time called.
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* @returns {void}
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*/
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static async initMetrics() {
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if (!this.monitorLabelNames) {
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let labelNames = await R.getCol("SELECT name FROM tag");
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this.monitorLabelNames = [ ...commonLabels, ...labelNames ];
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}
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if (!this.monitorCertDaysRemaining) {
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this.monitorCertDaysRemaining = new PrometheusClient.Gauge({
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name: "monitor_cert_days_remaining",
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help: "The number of days remaining until the certificate expires",
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labelNames: this.monitorLabelNames
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});
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}
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if (!this.monitorCertIsValid) {
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this.monitorCertIsValid = new PrometheusClient.Gauge({
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name: "monitor_cert_is_valid",
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help: "Is the certificate still valid? (1 = Yes, 0 = No)",
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labelNames: this.monitorLabelNames
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});
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}
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if (!this.monitorResponseTime) {
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this.monitorResponseTime = new PrometheusClient.Gauge({
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name: "monitor_response_time",
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help: "Monitor Response Time (ms)",
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labelNames: this.monitorLabelNames
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});
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}
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if (!this.monitorStatus) {
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this.monitorStatus = new PrometheusClient.Gauge({
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name: "monitor_status",
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help: "Monitor Status (1 = UP, 0 = DOWN, 2 = PENDING, 3 = MAINTENANCE)",
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labelNames: this.monitorLabelNames
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});
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}
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}
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/**
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* Wrapper to create a `Prometheus` instance and ensure metrics are initialized.
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* @param {Monitor} monitor Monitor object to monitor
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* @returns {Promise<Prometheus>} `Prometheus` instance
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*/
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static async createAndInitMetrics(monitor) {
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await Prometheus.initMetrics();
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let tags = await monitor.getTags();
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return new Prometheus(monitor, tags);
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}
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/**
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* Creates a prometheus metric instance.
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*
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* Note: Make sure to call `Prometheus.initMetrics()` once prior creating Prometheus instances.
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* @param {Monitor} monitor Monitor object to monitor
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* @param {Promise<LooseObject<any>[]>} tags Tags of the monitor
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*/
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constructor(monitor, tags) {
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this.monitorLabelValues = {
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monitor_name: monitor.name,
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monitor_type: monitor.type,
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@ -46,6 +113,12 @@ class Prometheus {
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monitor_hostname: monitor.hostname,
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monitor_port: monitor.port
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};
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Object.values(tags)
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// only label names that were known at first metric creation.
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.filter(tag => Prometheus.monitorLabelNames.includes(tag.name))
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.forEach(tag => {
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this.monitorLabelValues[tag.name] = tag.value;
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});
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}
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/**
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@ -55,7 +128,6 @@ class Prometheus {
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* @returns {void}
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*/
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update(heartbeat, tlsInfo) {
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if (typeof tlsInfo !== "undefined") {
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try {
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let isValid;
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@ -64,7 +136,7 @@ class Prometheus {
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} else {
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isValid = 0;
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}
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monitorCertIsValid.set(this.monitorLabelValues, isValid);
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Prometheus.monitorCertIsValid.set(this.monitorLabelValues, isValid);
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} catch (e) {
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log.error("prometheus", "Caught error");
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log.error("prometheus", e);
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@ -72,7 +144,7 @@ class Prometheus {
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try {
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if (tlsInfo.certInfo != null) {
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monitorCertDaysRemaining.set(this.monitorLabelValues, tlsInfo.certInfo.daysRemaining);
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Prometheus.monitorCertDaysRemaining.set(this.monitorLabelValues, tlsInfo.certInfo.daysRemaining);
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}
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} catch (e) {
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log.error("prometheus", "Caught error");
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@ -82,7 +154,7 @@ class Prometheus {
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if (heartbeat) {
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try {
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monitorStatus.set(this.monitorLabelValues, heartbeat.status);
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Prometheus.monitorStatus.set(this.monitorLabelValues, heartbeat.status);
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} catch (e) {
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log.error("prometheus", "Caught error");
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log.error("prometheus", e);
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@ -90,10 +162,10 @@ class Prometheus {
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try {
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if (typeof heartbeat.ping === "number") {
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monitorResponseTime.set(this.monitorLabelValues, heartbeat.ping);
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Prometheus.monitorResponseTime.set(this.monitorLabelValues, heartbeat.ping);
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} else {
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// Is it good?
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monitorResponseTime.set(this.monitorLabelValues, -1);
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Prometheus.monitorResponseTime.set(this.monitorLabelValues, -1);
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}
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} catch (e) {
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log.error("prometheus", "Caught error");
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@ -108,10 +180,10 @@ class Prometheus {
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*/
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remove() {
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try {
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monitorCertDaysRemaining.remove(this.monitorLabelValues);
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monitorCertIsValid.remove(this.monitorLabelValues);
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monitorResponseTime.remove(this.monitorLabelValues);
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monitorStatus.remove(this.monitorLabelValues);
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Prometheus.monitorCertDaysRemaining?.remove(this.monitorLabelValues);
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Prometheus.monitorCertIsValid?.remove(this.monitorLabelValues);
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Prometheus.monitorResponseTime?.remove(this.monitorLabelValues);
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Prometheus.monitorStatus?.remove(this.monitorLabelValues);
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} catch (e) {
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console.error(e);
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}
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