const PrometheusClient = require("prom-client"); const { log_error } = require("../src/util"); const commonLabels = [ "monitor_name", "monitor_type", "monitor_url", "monitor_hostname", "monitor_port", ]; const monitor_cert_days_remaining = new PrometheusClient.Gauge({ name: "monitor_cert_days_remaining", help: "The number of days remaining until the certificate expires", labelNames: commonLabels }); const monitor_cert_is_valid = new PrometheusClient.Gauge({ name: "monitor_cert_is_valid", help: "Is the certificate still valid? (1 = Yes, 0= No)", labelNames: commonLabels }); const monitor_response_time = new PrometheusClient.Gauge({ name: "monitor_response_time", help: "Monitor Response Time (ms)", labelNames: commonLabels }); const monitor_status = new PrometheusClient.Gauge({ name: "monitor_status", help: "Monitor Status (1 = UP, 0= DOWN)", labelNames: commonLabels }); class Prometheus { monitorLabelValues = {} constructor(monitor) { this.monitorLabelValues = { monitor_name: monitor.name, monitor_type: monitor.type, monitor_url: monitor.url, monitor_hostname: monitor.hostname, monitor_port: monitor.port }; } update(heartbeat, tlsInfo) { if (typeof tlsInfo !== "undefined") { try { let is_valid = 0; if (tlsInfo.valid == true) { is_valid = 1; } else { is_valid = 0; } monitor_cert_is_valid.set(this.monitorLabelValues, is_valid); } catch (e) { log_error("prometheus", "Caught error"); log_error("prometheus", e); } try { if (tlsInfo.certInfo != null) { monitor_cert_days_remaining.set(this.monitorLabelValues, tlsInfo.certInfo.daysRemaining); } } catch (e) { log_error("prometheus", "Caught error"); log_error("prometheus", e); } } try { monitor_status.set(this.monitorLabelValues, heartbeat.status); } catch (e) { log_error("prometheus", "Caught error"); log_error("prometheus", e); } try { if (typeof heartbeat.ping === "number") { monitor_response_time.set(this.monitorLabelValues, heartbeat.ping); } else { // Is it good? monitor_response_time.set(this.monitorLabelValues, -1); } } catch (e) { log_error("prometheus", "Caught error"); log_error("prometheus", e); } } remove() { try { monitor_cert_days_remaining.remove(this.monitorLabelValues); monitor_cert_is_valid.remove(this.monitorLabelValues); monitor_response_time.remove(this.monitorLabelValues); monitor_status.remove(this.monitorLabelValues); } catch (e) { console.error(e); } } } module.exports = { Prometheus };