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Hornwitser
b742291131
When the slave metrics request takes more than 10 seconds the response to the /metrics endpoint ends up being discarded by Prometheus which defaults to a timeout of 10 seconds. Fix by ignoring slaves that take longer than 8 seconds to respond to the metrics request.
60 lines
1.3 KiB
JavaScript
60 lines
1.3 KiB
JavaScript
/**
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* Collection of small utilites that are useful in multiple places.
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* @module lib/helpers
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*/
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"use strict";
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/**
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* Return a string describing the type of the value passed
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*
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* Works the same as typeof, excpet that null and array types get their
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* own string.
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*
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* @param {*} value - value to return the type of.
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* @returns {string} basic type of the value passed.
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*/
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function basicType(value) {
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if (value === null) { return "null"; }
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if (value instanceof Array) { return "array"; }
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return typeof value;
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}
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/**
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* Asynchronously wait for the given duration
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*
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* @param {number} duration - Time to wait for in milliseconds.
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*/
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async function wait(duration) {
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await new Promise(resolve => { setTimeout(resolve, duration); });
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}
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/**
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* Resolve a promise with a timeout.
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*
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* @param {Promise} promise - Promise to wait for.
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* @param {number} time - Maximum time im milliseconds to wait for.
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* @param {*=} timeoutResult - Value to return if the operation timed out.
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*/
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async function timeout(promise, time, timeoutResult) {
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let timer;
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try {
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return await Promise.race([
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promise,
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new Promise(resolve => {
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timer = setTimeout(() => resolve(timeoutResult), time);
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}),
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]);
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} finally {
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clearTimeout(timer);
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}
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}
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module.exports = {
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basicType,
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wait,
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timeout,
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};
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