💻Baremetal

Authors: Godwin

System Requirements

CPU	OS	RAM	DISK
2 -4 Cores (Fastest per core speed)	Debian 12/Ubuntu 22.04	8 - 16 GB	286GB (SSD)

The gravity node has a size of 268GB on January 28, 2025

Offchain Labs ⛓️

Official Docs https://docs.arbitrum.io/node-running/how-tos/running-an-archive-node

Pre-Requisites

sudo apt update -y && sudo apt upgrade -y && sudo apt autoremove -y

sudo apt install -y git make wget gcc pkg-config libusb-1.0-0-dev libudev-dev jq gcc g++ curl libssl-dev screen apache2-utils build-essential pkg-config

Setting up Firewall

Set explicit default UFW rules

sudo ufw default deny incoming
sudo ufw default allow outgoing

Allow SSH

sudo ufw allow 22/tcp
sudo ufw allow 8546
sudo ufw allow 8547

Not advised to allow all or unknown IP address to RPC port

Enable Firewall

sudo ufw enable

Install Docker

for pkg in docker.io docker-doc docker-compose docker-compose-v2 podman-docker containerd runc; do sudo apt-get remove $pkg; done

Add Docker Official GPG Key

sudo apt-get update
sudo apt-get install ca-certificates curl
sudo install -m 0755 -d /etc/apt/keyrings
sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
sudo chmod a+r /etc/apt/keyrings/docker.asc

Add the repository to ppt source

echo \
  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \
  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
  
sudo apt-get update

Install Docker

sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

# Test docker is working
sudo docker run hello-world

Install go

Download the Go programming language distribution archive, extracts it to the "/usr/local" directory, and then removes the downloaded archive, effectively installing Go version 1.23.5 on the system.

wget https://go.dev/dl/go1.23.5.linux-amd64.tar.gz && \
rm -rf /usr/local/go && \
tar -C /usr/local -xzf go1.23.5.linux-amd64.tar.gz && \
rm go1.23.5.linux-amd64.tar.gz

Add /usr/local/go/bin to the PATH environment variable.

You can do this by adding the following line to your $HOME/.profile or /etc/profile (for a system-wide installation):

export PATH=$PATH:/usr/local/go/bin

 go version

Build Nitro with Docker

git clone --recurse-submodules https://github.com/OffchainLabs/nitro/
cd nitro
docker build -t nitro .

Copy Nitro binary from docker to /root/nitro/build/bin

docker cp $(docker run -it -d nitro):/usr/local/bin/nitro /root/nitro/build/bin/
/root/nitro/build/bin/nitro -h # test

Create service to run Nitro Node

Create a local directory and replace <some_local_dir> with your path

mkdir -p /root/.gravity/share/nitro/datadir

Create service

sudo nano /etc/systemd/system/gravity.service

[Unit]
Description=Gravity Alpha Mainnet Node
After=network.target

[Service]
Type=simple
Restart=on-failure
RestartSec=5
TimeoutSec=900
User=root
Nice=0
LimitNOFILE=200000
ExecStart=/root/nitro/build/bin/nitro \
  --parent-chain.connection.url=<ethereum_mainnet_rpc> \
  --persistent.chain=/root/.gravity/share/nitro/datadir/ \
  --persistent.global-config=/root/.gravity/share/nitro/ \
  --chain.id=1625 \
  --chain.name=conduit-orbit-deployer \
  --chain.info-json='[{\"chain-id\":1625,\"parent-chain-id\":1,\"chain-name\":\"conduit-orbit-deployer\",\"chain-config\":{\"chainId\":1625,\"homesteadBlock\":0,\"daoForkBlock\":null,\"daoForkSupport\":true,\"eip150Block\":0,\"eip150Hash\":\"0x0000000000000000000000000000000000000000000000000000000000000000\",\"eip155Block\":0,\"eip158Block\":0,\"byzantiumBlock\":0,\"constantinopleBlock\":0,\"petersburgBlock\":0,\"istanbulBlock\":0,\"muirGlacierBlock\":0,\"berlinBlock\":0,\"londonBlock\":0,\"clique\":{\"period\":0,\"epoch\":0},\"arbitrum\":{\"EnableArbOS\":true,\"AllowDebugPrecompiles\":false,\"DataAvailabilityCommittee\":true,\"InitialArbOSVersion\":11,\"InitialChainOwner\":\"0xd65776c5F9fA552cB5C9556B3e86bF6c376b233b\",\"GenesisBlockNum\":0}},\"rollup\":{\"bridge\":\"0x7983403dDA368AA7d67145a9b81c5c517F364c42\",\"inbox\":\"0x7AD2a94BefF3294a31894cFb5ba4206957a53c19\",\"sequencer-inbox\":\"0x8D99372612e8cFE7163B1a453831Bc40eAeb3cF3\",\"rollup\":\"0xf993AF239770932A0EDaB88B6A5ba3708Bd58239\",\"validator-utils\":\"0x2b0E04Dc90e3fA58165CB41E2834B44A56E766aF\",\"validator-wallet-creator\":\"0x9CAd81628aB7D8e239F1A5B497313341578c5F71\",\"deployed-at\":19898364}}]' \
  --http.api=net,web3,eth \
  --http.corsdomain=* \
  --http.addr=0.0.0.0 \
  --http.port=8547 \
  --http.vhosts=* \
  --node.data-availability.enable \
  --node.data-availability.rest-aggregator.enable \
  --node.data-availability.rest-aggregator.urls=https://das-gravity-mainnet-0.t.conduit.xyz \
  --execution.forwarding-target=https://rpc.gravity.xyz \
  --node.feed.input.url=wss://relay-gravity-mainnet-0.t.conduit.xyz \
  --parent-chain.blob-client.beacon-url=<ethereum_beacon_chain_rpc>



KillSignal=SIGHUP

[Install]
WantedBy=multi-user.target

1. Run your own Ethereum mainnet node or use a node provider with unlimited rate limit for eth_getLogs and replace <ethereum_mainnet_rpc> with your rpc endpoint.

2. Replace <ethereum_beacon_chain_rpc> with your own Ethereum beacon chain rpc endpoint.

Ctrl+X and Y to save changes

systemctl enable gravity.service #enable gravity service at system startup

sudo systemctl daemon-reload #refresh systemd configuration when changes made

sudo systemctl start gravity.service #start gravity

sudo systemctl stop gravity.service #stop gravity

To check or modify gravity.service parameters simply run

sudo nano /etc/systemd/system/gravity.service

Ctrl+X and Y to save changes

journalctl -f -u gravity.service  #follow logs of gravity service

The logs should look like below and indicate that your node syncs and is expected to reach chainhead in about a week

INFO [01-28|23:32:36.178] created block                            l2Block=36,676,753 l2BlockHash=f84024..8ee71c
INFO [01-28|23:32:37.179] created block                            l2Block=36,676,756 l2BlockHash=1e0d92..5f8afb
INFO [01-28|23:32:38.180] created block                            l2Block=36,676,760 l2BlockHash=e097e7..079758

References

Gravity Alpha Mainnet (L2) Node Setup | Gravity Docsdocs.gravity.xyz

Run Full Nodearbitrum

Arbitrum Nodes | Conduit DocumentationConduit Documentation