Run a node on a server with Ubuntu on Mainnet#
This guide describes how organizations can run a node on the Concordium network from a server and how to set up the node to run as a baker node.
You can also watch the video to learn how to run a node with Ubuntu.
Install the Debian package and run a node#
To run the node, you must install a Debian package.
After installation, the
concordium-mainnet-node-collector services will be started.
The services are also enabled to start automatically on system start.
Download the Debian package
Install the package:
$sudo apt install /path-to-downloaded-package
path-to-downloaded-packageis the location of the downloaded
The path should be absolute, e.g.,
aptwill assume that you want to install a package from the registry.
node namewhen prompted. The node name is visible on the network dashboard. When you have installed the services, the
concordium-mainnet-nodewill be running automatically.
To verify that the node is running, go to the Concordium dashboard and look for a node with the name you provided.
If the node is well behind the head of the chain, you can speed up initial catchup by downloading a batch of blocks and using out of band catchup.
Download mainnet blocks from catchup.mainnet.concordium.software. The remaining steps assume that the file is stored in
Stop the node if it is running$sudo systemctl stop concordium-mainnet-node.service
Edit the node service configuration file$sudo systemctl edit concordium-mainnet-node.service
Add the following under the
[Service]section (create the section if it does not exist)Environment=CONCORDIUM_NODE_CONSENSUS_IMPORT_BLOCKS_FROM=%S/concordium-9dd9ca4d19e9393877d2c44b70f89acbfc0883c2243e5eeaecc0d1cd0503f478/blocks_to_import.mdb BindReadOnlyPaths=~/Downloads/blocks_to_import.mdb:%S/concordium-9dd9ca4d19e9393877d2c44b70f89acbfc0883c2243e5eeaecc0d1cd0503f478/blocks_to_import.mdb
Start the service again$sudo systemctl start concordium-mainnet-node.service
After the node is caught up remove the out of band catchup configuration to speed up further node restarts.
concordium-mainnet-node service that you just installed will be running around the clock, except if you’re going to restart the node with baker keys.
If you want more detailed information about building and maintaining a node, or if your node is not running, see the Building .deb packages for ubuntu distributions README from Concordium
Enable inbound connections#
If you are running your node behind a firewall, or behind your home router, then you will probably only be able to connect to other nodes, but other nodes will not be able to initiate connections to your node. This is perfectly fine, and your node will fully participate in the Concordium network. It will be able to send transactions and, if so configured, to bake and finalize.
However you can also make your node an even better network participant
by enabling inbound connections. By default,
8888 for inbound connections on Mainnet. Depending on your network and
platform configuration you will need to forward an external port
8888 on your router, open it in your firewall, or both. The
details of how this is done will depend on your configuration.
To upgrade to a newer version of the concordium-mainnet-node package you need to:
Install the new package
$apt install ./concordium-mainnet-node_(version)_amd64.deb
This step performs automatic database migration, so that the new node doesn’t have to catch up from scratch. After installation is completed, the node and the collector are started as before.