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 4.5 TB of Amazon EBS General Purpose SSD (gp2) storage (or equivalent or better).
What are we going to do?
1.​Launch Cloud Instance​
2.​Set up Non-Root User​
3.​Install Required Tools​
Launch Cloud Instance
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 4.5 TB of disk space. 
We would recommend going with Ubuntu Server 20.04 LTS (64-bit). 

Storage
4.5 TB is needed if you're running with a full size datadir.
Alternatively, 1.5TB is sufficient if you're running using a pruned datadir.

Available snapshots for download: link.
Network Settings
Open up port 22 for SSH, as well as port 5050 for both TCP and UDP traffic. A custom port can be used with "--port <port>" flag when run your opera node.
Set up Non-Root User
If there is already a non-root user available, you can skip this step.
# SSH into your machine
(local)$ ssh [email protected]{IP_ADDRESS}
# 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}
Install Required Tools
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://go.dev/dl/go1.17.8.linux-amd64.tar.gz
$ sudo tar -xvf go1.17.8.linux-amd64.tar.gz
$ sudo mv go /usr/local
Export the required Go paths:
# Export go paths
$ vi ~/.bash_aliases
# Append the following lines
export GOROOT=/usr/local/go
export GOPATH=$HOME/go
export PATH=$GOPATH/bin:$GOROOT/bin:$PATH
Validate your Go installation
Run your read node
You can run your read node using go-opera 1.1.1-rc.2 (either snap or full sync mode). Note that https and ws must not be enabled on a server that stores wallet account.
# Install Opera
(validator)$ git clone https://github.com/Fantom-foundation/go-opera.git
(validator)$ cd go-opera/
(validator)$ git checkout release/1.1.1-rc.2
(validator)$ make
Validate your Opera installation:
$./build/opera help
​
VERSION:
1.1.1-rc.2
Download a genesis file from this list of genesis files. 
# Start opera node
(validator)$ cd build/
(validator)$ wget https://download.fantom.network/mainnet-109331-pruned-mpt.g
(validator)$ nohup ./opera --genesis mainnet-109331-pruned-mpt.g --nousb &
You can start a node with a syncmode flag. There are two possible options:
 "--syncmode snap", and
"--syncmode full" (by default).
For archive node and validator node, you should use full syncmode.
​
*For latest update, please check https://github.com/Fantom-foundation/lachesis_launch.

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Outline

Read-only node parameters

What are we going to do?

Launch Cloud Instance

Install Required Tools

Run your read node