Message from the Maintainer: Due to some priority changes in my life I am not able to put as much effort in here as needed. Some things might be broken. For 2021 a major rehaul is planned and prepared in the background. Helping hands are always welcome.

Coinboot is a framework for diskless computing.

Coinboot was initially made to run GPU-based blockchain hashing on mining farms with a minimal TCO.
Coinboot can also be used to run various other number crunching workloads like
video rendering or machine learning with a minimal TCO.

Its core features are:

• Running Diskless

  With Coinboot there is no need to equip machines with storage media like SSDs, HDDs or USB flash drives.
  All machines are booting the operating system over network and run completely from memory, in-memory.

• Lightweight Footprint

  Coinboot has a lightweight footprint.
  Driven by the demand to run sufficiently on hundreds of machines with commodity 1 Gbit/s network hardware.

• Familiar Usability

  No bumpy ride.
  Coinboot feels just like every other Debian/Ubuntu-based system.

• Easy Expandability

  Need to expand your worker nodes with further configuration, software, libraries, proprietary drivers?
  By packing them as Coinboot plugin you can use them right after your machines have booted.
  Without the overhead caused by configuration managment or running complex orchestration infrastructure.

• Insights out of the box

  Coinboot comes with Loki integrated for log managment.
  Providing the log files of your worker nodes at a glance.

This repository contains the Coinboot Server Docker container.
This container includes all services to get Coinboot up and running and boot diskless Coinboot Worker nodes over network.

Docker ≥ 18.06.0-ce

Docker Compose ≥ 1.25.0

Clone this repository on the host where you want to execute the Coinboot Docker container.

Take care that your Docker host has assigned an IP address matching to the dhcp-range specified at ./conf/dnsmasq/coinboot.conf.
For example the Docker host has assigned 192.168.1.2 then a matching DHCP-range configuration is: dhcp-range=192.168.1.10,192.168.1.100,6h.
Also verify that the network adapter you assigned this IP address on your Docker host is connected to the same L2/broadcast domain as the machines you want to boot with Coinboot.

You can hand over environment variables to the worker nodes booting with Coinboot.
This way you can keep the configuration of your Coinboot Worker nodes at one point.
Just put these variables in a file in the directory ./conf/environment/.
These variables are added to /etc/environment on the worker nodes during boot and are exported and available for login shells on these nodes.
If these variables are not exported and available, e.g. in Systemd units, just source the file /etc/environment to make them available.

There are also mandatory environment variables which are required to be configured.

The RootFS and Kernel are downloaded autmatically when the Coinboot Server Docker container is started based on the RELEASEset at ./conf/environment/default.env. Out of the box the latest available release is used.

You can build your own Coinboot base image using: coinboot-debirf.
Or download a pre-build daily release at: https://github.com/frzb/coinboot/releases
These builds are made daily to contain all current packages updates and security fixes. The RootFS (*initramfs*) and Kernel (*vmlinuz*) you want to use are to be placed in the directory ./boot.

Coinboot plugins should be placed into the directory ./server/plugins

You can create your own plugins (see below) or pick some at: ./plugins

Put your own dnsmasq DHCP server configuration in ./conf/dnsmasq/ or edit the existing configuration file ./conf/dnsmasq/coinboot.conf.

In the most cases you should only need to configure:

• DHCP lease range
• DNS server
• Default network gateway

Take care that your Docker host has assigned an IP address matching to the dhcp-range specified at ./conf/dnsmasq/coinboot.conf.

For example the Docker host has assigned 192.168.1.2 then a matching DHCP-range configuration is: dhcp-range=192.168.1.10,192.168.1.100,6h.

Also verify that the network adapter you assigned this IP address on your Docker host is connected to the same L2/broadcast domain as the machines you want to boot with Coinboot.

Configure the BIOS/Firmware of the worker nodes to boot over network with PXE.

Some mainboards for blockchain hashing don't have support for PXE network booting by the BIOS/Firmware off the shelf.
In this case Coinboot can be booted via chainloading of a network bootloader from a local boot drive of the worker node.
Boot scheme in such a scenario is:

GRUB(local SSD) → iPXE(local SSD) → iPXE(Network) → Coinboot OS

To setup this chainloading run ./scripts/set_up_grub_ipxe_chainloading on the worker nodeand follow the instructions provided by the script.

Just bring the Coinboot Server Docker and Graylog containers up with docker-compose.

$ docker-compose up -d

Start your worker nodes.
After they have booted Coinboot over network you can login to your machines over ssh.
Default credentials are:

• login: ubuntu
• password: ubuntu

Please change the password via creating a Coinboot Plugin.

To see what's currently going on you can look at the logfiles of the Coinboot Docker container.
For instance to see the DHCP lease hand-shakes happen or what plugins are delivered.

$ docker-compose logs -f coinboot

Coinboot comes with Loki as centralized log management collecting iPXE bootloader and Kernel message of all your worker nodes.

Login with your web browser at the preconfigured Grafana instance: http://your-Docker-host-IP:3000`

• login admin

• password: admin

Change the initial password as suggested by Grafana.

Get to the Explore section and select the worker node by host label to browse the log files of individual worker nodes.
For more details about the usage of the Grafana Explore for exploring log files please refer to the logs section of the Grafana Explore documentation.

There is Vagrant environment for developing purposes. It consists of two Vagrant machines: One with the the Coinboot Server Docker container and one machine acting as worker node, which boots over PXE.

To spin up the Vagrant machines execute:

$ vagrant up

A Coinboot plugin is the way to go to extend the functionality of machines that boot with Coinboot.
Basically a Coinboot plugin is just set of file system changes that is applied at boot time.

Coinboot plugins can be created with the helper tool called coinbootmaker.

GNU GPLv3

Gunter Miegel gm@coinboot.io

Fork this repo. Use the test- and development environment provided. Make a pull request to this repo.