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Chef: add node attributes automatically

Using knife exec

The best way probably

knife exec -E "nodes.find(:name => 'chef-node') { |node|  node.normal_attrs['some_key'] = 'some_value'; node.save; }"

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Use the delegate instance methods flexibly in class:

require 'forwardable'

class MyHash

  extend(Forwardable)

 include(Enumerable)

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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:

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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

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1. Add docker repo

sudo add-apt-repository \
   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
   $(lsb_release -cs) \
   stable"

2. Update

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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

dmytrotkk

This will create a proxy server in whatever your availability zone your VPC is in. For me, that's us-east-1b. For you, that may be something different. Steps 10+ should more or less work regardless of your provider since those steps cover the setup and configuration of TinyProxy.

1. Click the Launch Instance button.
2. Choose Ubuntu Server 14.04 LTS (HVM), SSD Volume Type. This isn't strictly necessary. If you choose another OS, check its documentation for how to install new packages.
3. On the Choose an Instance Type screen, select t2.micro. It's Free Tier eligible.
4. Click the Next: ... buttons until you reach the Configure Security Group screen.
   • You may wish to reduce the amount of storage on the Add Storage screen. This is optional.
   • You may wish to add a tag on the Tag Instance screen. This is also optional.
5. On the Configure Security Group screen:

• Select Create a new security group.

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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

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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

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Ruby

1. Outside ENV strings are frozen:

example.rb:

ENV['foo'].strip!

Run: