This nifty script creates a few services in systemd to spin up or down your service depending on traffic.
This is universal, doesn't use ANY 3rd party software outside of systemd and so it has the smallest attack surface imaginable!
This is also fully costumizable since it's all plain systemdservice files.
| // This middleware example takes in the entire swagger spec and tries to find the route in it. | |
| const validate = require('swagger-route-validator'); | |
| const spec = require('./my-spec'); | |
| function validateRequest(req, res, next) { | |
| const layer = app._router.stack.find(bloc => bloc.route && bloc.regexp.exec(req.originalUrl) !== null); | |
| // Check if route exists | |
| if (!layer) return next(); |
| export function to<T = any>(promise: Promise<T>): Promise<[null, T] | [any, null?]> { | |
| return promise | |
| .then((data) => [null, data] as [null, T]) | |
| .catch((err) => [err] as [any]); | |
| } |
| export function deferred<T>() { | |
| let resolve: (value?: T | PromiseLike<T>) => void; | |
| let reject: (reason?: any) => void; | |
| const promise = new Promise<T>((res, rej) => { | |
| resolve = res; | |
| reject = rej; | |
| }); | |
| return { promise, resolve, reject }; | |
| } |
((R * T) / 1000) * 1.2
Ex:
((200 RPM * 200ms) / 1000) * 1.2 = 48 connections required
| #!/bin/bash | |
| # Go setup: | |
| bash < <(curl -s -S -L https://raw.githubusercontent.com/moovweb/gvm/master/binscripts/gvm-installer) | |
| source ~/.gvm/scripts/gvm | |
| sudo apt-get install bison -y | |
| gvm install go1.14 -B | |
| gvm use go1.14 |
| function romanToNum(str) { | |
| const symbols = 'IVXLCDM'; | |
| let acc = ''; | |
| // Reverse iterate through the provided characters | |
| for (let i = str.length - 1; i >= 0; i--) { | |
| // Get the associated roman character symbol's order in the list | |
| let index = symbols.indexOf(str[i]); | |
| // Calculate the value for the symbol 1 || 5 ^ 10 based on the previous index value | |
| let value = (index % 2 === 0 ? 1 : 5) * (10**(index>>1)); |
| const { promisify } = require('util'); | |
| const stream = collection.find(); | |
| const next = promisify(stream.nextObject); | |
| let row; | |
| while(null !== (row = await next(stream))) { | |
| // do stuff with your row | |
| } |
| # Final production image | |
| # =============================== | |
| FROM node:14 as final | |
| RUN mkdir /app && chown node:node /app | |
| RUN wget -O /usr/local/bin/dumb-init https://github.com/Yelp/dumb-init/releases/download/v1.2.2/dumb-init_1.2.2_amd64 | |
| RUN chmod +x /usr/local/bin/dumb-init | |
| USER node |
| const toRadians = num => num * Math.PI / 180; | |
| // Get the long, lat values for the desired dc | |
| module.exports.datacenters = { | |
| 'ap-east-1': [22.29, 114.16 ], | |
| 'ap-northeast-1': [35.41, 139.42 ], | |
| 'ap-northeast-2': [37.56, 126.98 ], | |
| 'ap-northeast-3': [34.65, 136 ], | |
| 'ap-south-1': [19.08, 72.88 ], | |
| 'ap-southeast-1': [1.37, 103.8 ], |
