How to Deploy a Chainlink node with an Ethereum Client

Posted By : Shivam Grover | 31-Aug-2020

What is Chainlink?


ChainLink is a network(decentralized) of computing nodes. It provides us information/data from off-blockchain sources to on blockchain smart contracts with the help of oracles. It bridges the gap between smart-contracts on blockchain and real-world applications.


The data between the blockchain and the real world is known as “oracles”.


Developed by a company named SmartContract founded in 2014.





  • Docker- CE
  • PSQL Database
  • Terminal (Command Line)


Installing Docker


> curl -sSL | sh

> sudo usermod -aG docker $USER

> Exit

# log in again


Setting Up an Ethereum Client


To run a ChainLink full node, you first need an Ethereum client with a websocket connection(ws/wss).


Download the latest eth client version from dockerhub:


docker pull ethereum/client-go:latest


Run the container:


docker run --name eth -p 8546:8546 -v ~/.geth:/geth -it ethereum/client-go --syncmode fast --ws --ipcdisable --wsaddr --wsorigins="*" --datadir /geth


Once the Eth node is synced completely we can run the chainlink node.


Create an Environment File


mkdir ~/.chainlink


echo "ROOT=/chainlink






ALLOW_ORIGINS=*" > ~/.chainlink/.env


Now run the following command to add the Ethereum WebSocket URL to the environment file.


echo "ETH_URL=ws://$ETH_CONTAINER_IP:8546" >> ~/.chainlink/.env


Run the following command to add the PSQL Databases URL to the environment file


echo "DATABASE_URL=postgresql://$USERNAME:[email protected]$SERVER:$PORT/$DATABASE" >> ~/.chainlink-ropsten/.env


Start the Chainlink Node


Now you can run the Docker image:


cd  docker run -p 6688:6688 -v ~/.chainlink:/chainlink -it --env-file=.env smartcontract/chainlink local n


The first time running this docker image(smartcontract/chainlink ), it will ask for a password. This password will be your wallet password that you can use to unlock the keystore file generated for you. Then, you'll see a prompt to enter an API Email-address and Password.




Now you connect to your Chainlink node's user interface by opening  http://localhost:6688 in your web browser.


That’s it. Your Chainlink full node is all set now and you can now easily interact with the smart-contracts on chainlink network and the Blockchain. Now, you can add some jobs and play around with the node


About Author

Shivam Grover

Shivam is a DevOps Enginner. He has a great knowledge in Cloud technologies and DevOps tools. Experienced with CICD implementation and microservices architecture.

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