DenisIzmaylov

Step By Step Guide to Configure a CoreOS Cluster From Scratch

This guide describes how to bootstrap new Production Core OS Cluster as High Availability Service in a 15 minutes with using etcd2, Fleet, Flannel, Confd, Nginx Balancer and Docker.

Content

• Introduction
  • Tools Used
• Basic Configuration

desigens

Доклад «Снова ошибки»

3 августа 2017, RamblerFront& meetup #2, Москва

В коде начинающих программистов обычно много ошибок. Постепенно мы набираемся опыта, код становится надежнее, покрывается тестами, и нам кажется, что ошибки в нашем коде практически исключены.

Но фронтенд — это неконтролируемая среда и произойти может что угодно. Доклад о том, как начать использовать ошибки в свою пользу.

rndD

#!/usr/bin/env bash

# Фейковый npm
# Нужен для кэширования папки node_modules
# Кэш находится в папке ~/.cache/npm-inject/[sha1 хэш файла package.json]/node_modules
# 
# В PATH надо добавить путь папки с фейковым npm, таким образом при выполнении команды `npm install` 
# bash вызовет фейковый npm c параметром `install`.
# Фейк проверяет наличие папки [sha1 хэш файла package.json] в кэше.
# Если она в кэше, создаем на неё симлинк node_modules 

DenisIzmaylov

DigitalOcean Dokku / Node.js Cloud Environment

Custom recipe to get full Node.js Cloud Environment in DigitalOcean Dokku droplet running from scratch. Yes. Your own Heroku for $5 per month.

I use this gist to keep track of the important configuration steps required to have a functioning system after fresh install.

When you have executed that's all step by step you will get a new working and stable system which is ready to host & serve your Node.js application and databases.

• Dokku installation
  • Configure locale
• Fix memory issues

jimmycuadra

#cloud-config

coreos:
  etcd:
    # generate a new token for each unique cluster from https://discovery.etcd.io/new
    discovery: https://discovery.etcd.io/<token>
    # multi-region deployments, multi-cloud deployments, and droplets without
    # private networking need to use $public_ipv4
    addr: $private_ipv4:4001
    peer-addr: $private_ipv4:7001

DenisIzmaylov

{
  "ru": {
    "Your original english text": "Твой оригинальный русский текст"
  }
}

learncodeacademy

Running a High Availability Service on CoreOS using Docker, Fleet, Flannel, Etcd, Confd & Nginx

• View the diagram of what's going on: https://drive.google.com/file/d/0B74l6vUHf9HrMzNrYUlyMm40RWs/view?usp=sharing

Tools used:

• coreos: server machine clustering via a shared cloud-config.yml
• etcd: key value store for service registration and discovery
• fleet: scheduling/failover of docker containers across coreos cluster
• flannel: Gives each docker container a unique ip that allows you to access the internal port (i.e. port 80 not 32679)
• confd: watch etcd for nodes arriving/leaving - template nginx configuration files / reload nginx on change

ianblenke

Before upgrading, make sure you are allowing insecure registry access, or your newer docker won't be able to talk to the Deis registry:

sudo bash -c 'mkdir -p /etc/systemd/system/docker.service.d/; cat <<EOF > /etc/systemd/system/docker.service.d/50-insecure-registry.conf
[Service]
Environment="DOCKER_OPTS=--insecure-registry 10.0.0.0/8 --insecure-registry 172.16.0.0/12 --insecure-registry 192.168.0.0/16"
EOF
'

DenisIzmaylov

function offset(count, offset, limit) {
  const finalOffset = Math.max(Math.min(count, offset), 0);
  const remainedCount = Math.min(count, count - finalOffset);
  const finalCount = (typeof limit === 'number') ? Math.min(limit, remainedCount) : remainedCount;
  return { offset: finalOffset, finalCount: finalCount };
}

console.log(offset(10, 0)); // {"offset":0,"finalCount":10}
console.log(offset(10, 4)); // {"offset":4,"finalCount":6}
console.log(offset(10, 10)); // {"offset":10,"finalCount":0}

Lendar

import React from 'react'
import 'fontfaceobserver'
import IndexPage from './IndexPage'
import Loader from './Loader'

import { fetchUser } from '../apiclient'

import 'font-awesome-webpack'
import './Lato-font.css'
import './Roboto-font.css'