Some notes for creating a private ethereum blockchain on multiple nodes using Clique Proof of Authority.
#1. Run this on every node you want to connect:
# Install dependencies + Ethereum
sudo apt-get install software-properties-common
sudo add-apt-repository -y ppa:ethereum/ethereum
sudo apt-get update
sudo apt-get -y install ethereum
# Create new account for each account we want to give access
geth --datadir data account new
#2. Run this on one of the nodes and distribute to the rest of the nodes:
# Create a genesis block configuration
puppeth # 2, 1, 2, 15, add seal accounts from step 1
# Copy it to every node:
scp ./genesis.json user@other.node:/path/to/workspace/genesis.json
#3. Run this on every node:
# Initialize the genesis block
geth --datadir data init genesis.json
# Start the clients
geth \
--datadir data \
--networkid REPLACE-WITH-NETWORK-ID-FROM-STEP-2 \
--nodiscover console \
--unlock REPLACE-WITH-ACCOUNT-FOR-NODE-FROM-STEP-1 \
--rpc \
--rpcport "8000" \
--rpcaddr "0.0.0.0" \
--rpccorsdomain "*" \
--nousb \
--rpcapi "eth,net,web3,miner,debug,personal,rpc"
#4. Administrative things
# Add new node as a sealer/signer
clique.propose("0xAccountOfTheNode", true)
# Connecting peers
admin.nodeInfo.enode # Run in the node you want to connect to
# Run from the node you want to connect from
admin.addPeer("enode://a-really-long-string@public.ip.adress.of.node:30303")