hornet-mainnet-tutorial

This tutorial applies to Linux distributions with APT package manager

Prepare essentials

apt install build-essential git nano

Install Golang

See https://golang.org/doc/install for install instructions.

cd /tmp
wget https://golang.org/dl/go1.16.4.linux-amd64.tar.gz
rm -rf /usr/local/go && tar -C /usr/local -xzf go1.16.4.linux-amd64.tar.gz
export PATH=$PATH:/usr/local/go/bin

Optional add the export to /etc/profile or $HOME/.profile

Checkout and build Hornet

cd /opt
git clone -b main --single-branch https://github.com/gohornet/hornet
cd hornet

./scripts/build_hornet_rocksdb_builtin.sh 

Configure Hornet and Systemd Service

mkdir /opt/hornet-mainnet
cp /opt/hornet/hornet /opt/hornet-mainnet

cp /opt/hornet/config.json /opt/hornet-mainnet
cp /opt/hornet/peering.json /opt/hornet-mainnet
cp /opt/hornet/profiles.json /opt/hornet-mainnet

Create a systemd service file. Note that the following code needs to be copy/pasted completely to your terminal and hit Enter.

cat << EOF > /lib/systemd/system/hornet-mainnet.service
[Unit]
Description=Hornet Mainnet
After=network-online.target

[Service]
WorkingDirectory=/opt/hornet-mainnet
ExecStart=/opt/hornet-mainnet/hornet -c config.json
ExecReload=/bin/kill -HUP $MAINPID
TimeoutSec=infinity
KillMode=process
Restart=on-failure
RestartSec=100
Type=simple
User=root
Group=root
StandardOutput=syslog
StandardError=syslog
SyslogIdentifier=hornet-mainnet

[Install]
WantedBy=multi-user.target
EOF

Enable systemd servcie and start it.

systemctl enable hornet-mainnet.service
systemctl start hornet-mainnet && journalctl -u hornet-mainnet -f

If everything went fine hornet should start up. Cancel the log output with CTRL + C

Allow traffic through firewall (ufw), if configured.

ufw allow 8081/tcp
ufw allow 15600/tcp

Dashboard

Your Dashboard should be available via your IP address / hostname on port 8081 (eg. http://127.0.0.1:8081)

Remote Access

If you want remote access edit /opt/hornet-mainnet/config.json and change

bindAddress : 0.0.0.0:8081

Generate your password hash and salt with

/opt/hornet-mainnet/hornet tool pwdhash

The section should look something like this:

  "dashboard": {
    "bindAddress": "0.0.0.0:8081",
    "dev": false,
    "auth": {
      "sessionTimeout": "72h",
      "username": "admin",
      "passwordHash": "d2be30670649d661b3edb8969bbc525aa86d00f8914ea2423ad09870b5b0dd15",
      "passwordSalt": "0893a61b4c5a109149dc37c73fc3d0bf08ca54f0638b402f10f3c3eef376cb86"
    }
  },

Add Neighbors

The dashboad shows your Peer ID. You need the peer ID to generate your connection string which you share with your neighbors. You can find neighbors via the community project http://nodesharing.wisewolf.de/ or the IOTA Discord.

Example:

/dns/testnet.hornetnode.com/tcp/15600/ 12D3KooWS7nyRgFjzgkethzi6SDdjmuAGooxDmnoLzyex7Lu4hKo
/ip4/80.58.56.41/tcp/15600/ 12D3KooWS7nyRgFjzgkethzi6SDdjmuAGooxDmnoLzyex7Lu4hKo

Neighbors are added via the Dashboard. Alternatively they can be added to the peering.json like in pre Chrysalis Hornet. But the format changed.

Example:

{
  "peers": [
    {
      "alias": "Node1",
      "multiAddress": "/ip4/85.10.52.22/tcp/15601/p2p/12D3KooWPNAjVAtFdbDzbtB3htTFaGDWQePBK2TSGZLx3wwrkA97"
    },
    {
      "alias": "Node2",
      "multiAddress": "/dns/node-1.testnetnode.com/tcp/15601/p2p/12D3KooWPJ2tQ1uCTSj6L6UNLarkbRBLqWvucot6UQsUreTxtvX3"
    }
  ]
}

Alias need to be entered in the order of your peer list.

Updating a node

systemctl stop hornet-mainnet && cd /opt/hornet && git pull && scripts/build_hornet_rocksdb_builtin.sh && cp hornet /opt/hornet-mainnet && systemctl start hornet-mainnet

If the version contains breaking changes:

systemctl stop hornet-mainnet && cd /opt/hornet-mainnet && rm -rf mainnetdb && rm -rf snapshots && cd /opt/hornet && git pull && scripts/build_hornet_rocksdb_builtin.sh && cp hornet /opt/hornet-mainnet && systemctl start hornet-mainnet

If you got your node running and like to buy me a beer :D

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