Run a Read-only node

Read-only node parameters

• Minimum hardware requirements: AWS EC2 m5.xlarge with 4 vCPUs (3.1 GHz) and at least 1TB of Amazon EBS General Purpose SSD (gp2) storage (or equivalent).

What are we going to do?

You can either run a node on your own hardware or use a cloud provider. We would recommend choosing one of the big cloud providers, e.g. Amazon AWS.

Node Specifications

We recommend the following or better: m5.xlarge General Purpose Instance with 4 vCPUs (3.1 GHz), 16GB of memory, up to 10 Gbps network bandwidth, and at least 1TB of disk space.

We would recommend going with Ubuntu Server 20.04 LTS (64-bit).

Network Settings

Open up port 22 for SSH, as well as port 5050 for both TCP and UDP traffic.

Set up Non-Root User

If there is already a non-root user available, you can skip this step.

# SSH into your machine# Update the system$ sudo apt-get update && sudo apt-get upgrade -y# Create a non-root user$ USER={USERNAME}$ sudo mkdir -p /home/$USER/.ssh$ sudo touch /home/$USER/.ssh/authorized_keys$ sudo useradd -d /home/$USER $USER$ sudo usermod -aG sudo $USER$ sudo chown -R $USER:$USER /home/$USER/$ sudo chmod 700 /home/$USER/.ssh$ sudo chmod 644 /home/$USER/.ssh/authorized_keys

Make sure to paste your public SSH key into the authorized_keys file of the newly created user in order to be able to log in via SSH.

# Enable sudo without password for the user$ sudo vi /etc/sudoers

Add the following line to the end of the file:

{USERNAME} ALL=NOPASSWD: ALL

Now close the root SSH connection to the machine and log in as your newly created user:

# Close the root SSH connection$ exit# Log in as new user(local)$ ssh {USERNAME}@{IP_ADDRESS}

You are still logged in as the new user via SSH. Now we are going to install Go and Opera.

First, install the required build tools:

# Install build-essential$ sudo apt-get install -y build-essential

Install Go

# Install go$ wget https://dl.google.com/go/go1.15.10.linux-amd64.tar.gz$ sudo tar -xvf go1.15.10.linux-amd64.tar.gz$ sudo mv go /usr/local

Export the required Go paths:

# Export go paths$ vi ~/.bash_aliases# Append the following linesexport GOROOT=/usr/local/goexport GOPATH=$HOME/goexport PATH=$GOPATH/bin:$GOROOT/bin:$PATH

Validate your Go installation

Install Opera

# Install Opera$ git clone https://github.com/Fantom-foundation/go-opera.git$ cd go-opera/$ git checkout release/1.0.1-rc.1$ make

Validate your Opera installation:

$./build/opera help​VERSION:1.0.1-rc.1

*For latest update, please check https://github.com/Fantom-foundation/lachesis_launch.