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4. Building Your Collator

Let's get started​

Let's start with updating our server. Connect to your server and update:

sudo apt-get update
sudo apt-get upgrade
sudo apt install -y adduser libfontconfig1
note

the last command (related to libfontconfig1) is optional and required if you want install Grafana in the later sections of Secure Setup Guide).

Build the node​

To build a collator node, you have 3 different options

  • From source: experience with using Linux
  • From binary: easiest way to start and update node with new releases
  • Run a Docker container: Docker background requires

Build from source​

Building a node from source code is the most complicated path, but will also provide the best optimized node version for your server.

Make sure your server is ready to build a collator. The instructions that follow do not go into details which you can find in official Substrate Docs

## Prerequisites (Software required for compilation)
##
sudo apt install build-essential
sudo apt install --assume-yes git clang curl cmake llvm protobuf-compiler
sudo apt update

## Install Rust
##
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
source $HOME/.cargo/env
rustup update nightly
rustup target add wasm32-unknown-unknown --toolchain nightly

Clone the Astar repository:

git clone https://github.com/AstarNetwork/Astar.git
cd Astar

Make sure you have the latest commit in place:

git checkout
git pull

Compile the node binary:

CARGO_PROFILE_RELEASE_LTO=true RUSTFLAGS="-C codegen-units=1" cargo build --release

Build from binaries​

The easiest way to install an Astar node is to download the binaries. You can find them here: Astar releases.

Get the file and extract:

wget $(curl -s https://api.github.com/repos/AstarNetwork/Astar/releases/latest | grep "tag_name" | awk '{print "https://github.com/AstarNetwork/Astar/releases/download/" substr($2, 2, length($2)-3) "/astar-collator-v" substr($2, 3, length($2)-4) "-ubuntu-x86_64.tar.gz"}')
tar -xvf astar-collator*.tar.gz

Run a Docker container​

You can find here the Astar Docker hub.

Pull the latest Docker version

docker pull staketechnologies/astar-collator:latest

Launch Your Collator​

caution

The following steps are suitable for binary usage (built from source or downloaded). In case you want to run a Docker container, you will have to adapt those.

Create a dedicated user for the node and move the node binary (in this example, username is astar):

sudo useradd --no-create-home --shell /usr/sbin/nologin astar
sudo cp ./astar-collator /usr/local/bin
sudo chmod +x /usr/local/bin/astar-collator

Create a dedicated directory for the chain storage data:

sudo mkdir /var/lib/astar

zeafr Before running a collator, you have to create a node identity key.

sudo astar-collator key generate-node-key --chain astar --base-path /var/lib/astar/

Make astar user the owner of the chain directory:

sudo chown -R astar:astar /var/lib/astar

Now, let's go to our binary directory and start the collator manually:

cd /usr/local/bin

sudo -u astar ./astar-collator --collator --chain astar --state-pruning 1000 --name {COLLATOR_NAME} --base-path /var/lib/astar --telemetry-url 'wss://telemetry.polkadot.io/submit/ 0' -- --sync warp
tip

Type in the place of {COLLATOR_NAME}, what you would like to call your node.

See your node syncing on https://telemetry.polkadot.io/.

Useful commands to be used in screen: ctrl+a+d (detach actual session) screen ls (this will list all running screens) screen -r (restore a screen session)

Stop the manual node and kill the screen session:

ctrl+c
ctrl+a+k

Set systemd service​

To run a stable collator node, a systemd service has to be set and activated. This will ensure that the node is restarting even after a server reboot.

Create a service file

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

Add service parameters (this example is for Astar Network):

[Unit]
Description=Astar Collator

[Service]
User=astar
Group=astar
  
ExecStart=/usr/local/bin/astar-collator \
  --state-pruning archive \
  --collator \
  --name {COLLATOR_NAME} \
  --chain astar \
  --base-path /var/lib/astar \
  --telemetry-url 'wss://telemetry.polkadot.io/submit/ 0' \
  -- \
  --sync warp

Restart=always
RestartSec=120

[Install]
WantedBy=multi-user.target

Start the service:

sudo systemctl start astar.service

Check the node log and that everything is syncing fine:

journalctl -f -u astar.service -n100

Enable the service:

sudo systemctl enable astar.service

Snapshot​

Please refer to the snapshot page.

Finalizing​

To finalize your collator you need to:

  • Setup an account
  • Author your session key
  • Set up your session key
  • Verify your identity
  • Bond tokens

this part is covered in chapter Spin up a Collator