README.md

Full Node of mainnet

goal

spins up a geth node for ethereum chain using provisioning tools

requirements

env vars:

export TF_VAR_AWS_ACCESS_KEY=""
export TF_VAR_AWS_SECRET_KEY=""
export TF_VAR_SSH_PASSWORD=""  # to be used on logins without ssh keypair
export TF_VAR_REGION=""

• aws-cli
• terraform
• ansible
• jq (for parsing json)
• ssh keys (~/.ssh/id_rsa and ~/.ssh/id_rsa.pub)

setup

get an ip address alocated and append to ansible hosts, export the address to env

aws ec2 allocate-address > /etc/allocated-address
export NODE_IP=$(cat /etc/allocated-address | jq -r ".PublicIp")
export TF_VAR_ALLOCATION_ID=$(cat /etc/allocated-address | jq -r ".AllocationId")
echo $NODE_IP >> /etc/ansible/hosts

in case one would prefer to maintain the same address, the setting of the NODE_IP and TF_VAR_ALLOCATION_ID variables can be appended to ~/.profile or ~/.bashrc

usage

start and setup the instance

cd ./terraform && terraform init && terraform apply
cd ../
ansible-playbook ansible/main.yml
ssh ubuntu@$NODE_IP

and

geth --syncmode light --http

then, you can pull data from the chain by calling

curl http://$NODE_IP:8545/

cleanup

cleanup after the ip address, destroy the resources

cd ./terraform
terraform destroy
aws ec2 release-address --allocation-id $TF_VAR_ALLOCATION_ID
rm /etc/allocated-address

and dont forget to remove the host $(echo $NODE_IP) from /etc/ansible/hosts

License

MIT