Description

This role provisions a Nimbus installation that can act as an ETH2 network bootstrap node.

Introduction

The role will:

• Checkout a branch from the nimbus-eth2 repo
• Build it using the build.sh Bash script
• Schedule regular builds using Systemd timers
• Start a node by defining a Systemd service

Ports

The service exposes three ports by default:

• 9000 - LibP2P peering port. Must ALWAYS be public.
• 9200 - JSON RPC port. Must NEVER be public.
• 9900 - Prometheus metrics port. Should not be public.

Installation

Add to your requirements.yml file:

- name: infra-role-beacon-node-linux
  src: git+git@github.com:status-im/infra-role-beacon-node-linux.git
  scm: git

Configuration

The crucial settings are:

# branch which should be built
beacon_node_repo_branch: 'stable'
# ethereum network to connect to
beacon_node_network: 'mainnet'
# optional setting for debug mode
beacon_node_log_level: 'DEBUG'
# Infura WebSocket URLs
beacon_node_web3_urls: ['wss://mainnet.infura.io/ws/v3/123qwe123qwe123qwe']

The order of WebSocket URLs matters. First is the default, the rest are fallbacks.

Management

Service

Assuming the stable branch was built you can manage the service with:

sudo systemctl start beacon-node-mainnet-stable
sudo systemctl status beacon-node-mainnet-stable
sudo systemctl stop beacon-node-mainnet-stable

You can view logs under:

tail -f /data/beacon-node-mainnet-stable/logs/service.log

All node data is located in /data/beacon-node-mainnet-stable/data.

Builds

A timer will be installed to build the image:

 > sudo systemctl list-units --type=service '*beacon-node-*'
  UNIT                                LOAD   ACTIVE SUB     DESCRIPTION
  beacon-node-prater-stable.service   loaded active running Nimbus Beacon Node on prater network (stable)
  beacon-node-prater-testing.service  loaded active running Nimbus Beacon Node on prater network (testing)
  beacon-node-prater-unstable.service loaded active running Nimbus Beacon Node on prater network (unstable)

To rebuild the image:

 > sudo systemctl start build-beacon-node-prater-stable
 > sudo systemctl status build-beacon-node-prater-stable
 ● beacon-node-prater-stable-build.service - Build beacon-node-prater-stable
     Loaded: loaded (/etc/systemd/system/beacon-node-prater-stable-build.service; enabled; vendor preset: enabled)
     Active: inactive (dead) since Wed 2021-09-29 12:00:12 UTC; 2h 15min ago
TriggeredBy: ● beacon-node-prater-stable-build.timer
       Docs: https://github.com/status-im/infra-role-systemd-timer
    Process: 1212987 ExecStart=/data/beacon-node-prater-stable/build.sh (code=exited, status=0/SUCCESS)
   Main PID: 1212987 (code=exited, status=0/SUCCESS)

Sep 29 12:00:12 build.sh[1213054]: HEAD is now at 0b21ebfe readme: update toc
Sep 29 12:00:12 build.sh[1212987]:  >>> Binary already built
Sep 29 12:00:12 systemd[1]: beacon-node-prater-stable-build.service: Succeeded.
Sep 29 12:00:12 systemd[1]: Finished Build beacon-node-prater-stable.

To check full build logs use:

journalctl -u build-beacon-node-mainnet-stable.service

Requirements

Due to being part of Status infra this role assumes availability of certain things:

• The iptables-persistent module