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Network

We need a global docker network in order to communicate between docker-compose setups on different hosts

Step 1: Install and run Consul (as a key-value storage for docker)

https://www.consul.io/intro/getting-started/install.html

Step 2: Edit docker configuration (on each docker host)

@bbl
bbl / gotchas.md
Last active November 14, 2017 15:16
List of some weirdness and gotchas

Ruby

  1. Outside ENV strings are frozen:

example.rb:

ENV['foo'].strip!

Run:

How to run Chef-Solo programmatically:

require 'chef'
require 'chef/application/solo'

Chef::Config[:solo_legacy_mode] = true
Chef::Config[:cookbook_path] = [File.join(File.absolute_path(File.dirname(__FILE__)), 'cookbooks')]

chef_client = Chef::Application::Solo.new

Actually, it's a guide to setup docker macvlan network and it can be used to attach static ip to container on public/local network.

  1. Create docker public network:
docker network create -d macvlan --subnet=$SUBNET --gateway=$GATEWAY_IP -o parent=eth0 public

Where:
$SUBNET - your public network subnet
$GATEWAY_IP - your public network gateway

const EthereumTx = require('ethereumjs-tx');
const _ = require('lodash');
class Wallet {
constructor(web3, address, privateKey) {
this.web3 = web3;
this.address = address;
this.privateKey = Buffer.from(privateKey, 'hex');
}
@bbl
bbl / AWS_SWAP.md
Last active November 14, 2017 15:16
Create and use swap on aws instance (or any other ubuntu machine)

Platform: Ubuntu 16.04

  1. It is common practice to create swap that equals to your RAM. So firstly, you should find out your RAM:
free -m

Which outputs like:

 total used free shared buff/cache available
  1. Add docker repo
sudo add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"
  1. Update
@bbl
bbl / AWS_ENI_SECONDARY_IP.md
Last active November 14, 2017 15:16
Assign second IP to single elastic interface

This guide assumes you've configured your ENI inside linux instance. After you've assigned second ip address to your ENI in the AWS console, you need to reconfigure your interface inside intance.

Assume your interface name: eth1 Assume your second ip: $second_ip From the guide, mentioned above, the content of /etc/network/interfaces.d/eth1.cfg should look like:

auto eth1
iface eth1 inet static
 address $your_ip_addr
@bbl
bbl / AWS_ENI_GUIDE.md
Last active March 20, 2018 18:22
How to setup elastic interface on AWS instance.

AMI: ubuntu 16.04

Create and assign ENI
Assume additional interface name: eth1
Assume its private ip: 10.170.224.57
Assume mask: 255.255.0.0 (16)

Inside instance:

@bbl
bbl / Ruby_delegation.md
Last active November 14, 2017 15:16
Ruby delegation

Use the delegate instance methods flexibly in class:

require 'forwardable'

class MyHash

  extend(Forwardable)

 include(Enumerable)