Full Sync Node

General Steps

  1. Provision a machine.

  2. Notify core team of IP/IPs range (x.x.x.x:x.x.x.x) and SKALE Chain for full-sync.

  3. Complete full sync setup.

  • A Linux x86_64 machine

  • Ubuntu 20.04

  • 4 physical cores

  • 16GB RAM

  • 100GB root storage

  • 500GB attached storage

Node Network Requirements

  • Ports 80, 443, 3009, and 10000–18192, and ICMP IPv4 should not be closed by any firewall software.

Firewall setup is a part of skale binary. Any custom configuration may break or reduce the security of the system.

Node Software Prerequisites

  • 8GB Swap

  • docker

  • docker-compose → 1.29.2

  • iptables-persistent, btrfs-progs, lsof, lvm2, psmisc, and apt packages

From Fresh Machine

sudo apt-get update

# Install Docker and Docker-compose
sudo apt-get install docker.io
sudo curl -L "https://github.com/docker/compose/releases/download/1.29.2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose

# Install other dependencies
sudo apt install iptables-persistent btrfs-progs lsof lvm2 psmisc

# Setup Swapfile
sudo fallocate -l 8G /swapfile
sudo chmod 600 /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile
sudo cp /etc/fstab /etc/fstab.bak
echo '/swapfile none swap sw 0 0' | sudo tee -a /etc/fstab
Before proceeding, notify the core team of the IP address of your full-sync node. It’s suggested to use an elastic IP for the whitelisted IP address.


  1. Download sync-node-cli tool

    VERSION_NUM=2.3.0-sync-node.1 && sudo -E bash -c "curl -L https://github.com/skalenetwork/node-cli/releases/download/$VERSION_NUM/skale-$VERSION_NUM-`uname -s`-`uname -m`-sync >  /usr/local/bin/skale"
  2. Verify checksum

    # sha512sum /usr/local/bin/skale
    b35d88fba1269f859a996a1fefd9520e30f965c092d3ba716f8d7dd88694b821dc225641f75a60cef2364d0fbeb986d314f592fe4b4238c716acf0834d2d6146  /home/ubuntu/dist/skale-2.3.0-sync-node.1-Linux-x86_64-sync
  3. Apply executable permissions to the downloaded binary:

    chmod +x /usr/local/bin/skale
  4. Test the installation

    sudo skale --help
  5. Prepare .env file:

    DISK_MOUNTPOINT=[Your attached storage /dev/sda or /dev/xvdd (this is an example. You just need to use your 200GB block device)]
ENFORCE_BTRFS=True formats your attached device as btrfs even if there is another filesytem. Backup the storage before running the command.
  1. Init sync node:

    sudo skale sync-node init [ENV_FILE_PATH]
  2. Wait until your sync node will be inited.

  3. After the node is successfully inited, wait until skaled will download the snapshot and starts catchup blocks (usually 15–30 minutes).

Setup SSL certs

Node SSL certificates support secure communication with sChain endpoints. By default, each node of a SKALE Chain listens on HTTP and WS ports. If SSL certs exist on the node, then HTTPS and WSS ports are also turned on.

To upload SSL certs to the node run:

sudo skale ssl upload -c $PATH_TO_CERT_FILE -k $PATH_TO_KEY_FILE

To check the status of your certs run:

sudo skale ssl status

Once certs are uploaded, HTTPS/WSS endpoints should become available for your chain.

Full sync node update

Update full sync SKALE node on current machine

sudo skale sync-node update [ENV_FILEPATH]


  • --yes - update without additional confirmation.


  • ENV_FILEPATH - path to env file where parameters are defined.

You can just update a file with environment variables used during sudo skale sync-node init.