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Can anyone help me with something, I'm trying to run a web server over the cardano-node docker image.

I have some solutions in mind but I would like to have some feedback from you.

Approach # 1

Build a new image over the cardano-node docker image that install node and runs my server code.

My questions around this are:

  • Where can I find the cardano-node Dockerfile? I need to know what is already setup and what is the underlaying Linux distro.
  • Related to the previous one, how can I install Node over the cardano-node image? I have tried multiple mechanisms like apt-get and nothing works.

Approach # 2

Create my webserver in a different docker image and make the container communicate with the cardano-node container.

Questions:

  • How can I communicate my web server container with the cardano-node container so I can run the cardano-cli commands?
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2 Answers 2

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Approach 1 is the only one that makes sense to me in my limited knowledge of Containers. Containers, I understand, are different operating system context, not just different process so there isn't really IPC outside of the Docker api. The TCP/IP stack really shines here. Have a small web service with your Cardano-node / Cardano-cli which does basic things with the software and have an additional webserver act as the application level service, in my opinion.

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  • Yeah, that's something that I've thought about. However, the way the official Docker image was built makes it hard to extend. I have been thinking of creating my own following the Linux setup steps from the docs. The other part of your answer is that the docker-node image exposes the IPC through a volume, so that makes me think that it is possible to achieve such inter container communication; I don't know-how. This is my docker-compose.yml
    – Nacho Vazquez Calleja
    Commented Sep 27, 2021 at 20:16
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    yml version: '3.1' services: cardano-node: image: inputoutput/cardano-node environment: - NETWORK=testnet - CARDANO_NODE_SOCKET_PATH=/ipc/node.socket volumes: - data:/data - node-ipc:/ipc - ./dist/apps/cardano-server/outputs:/outputs volumes: data: node-ipc:
    – Nacho Vazquez Calleja
    Commented Sep 27, 2021 at 20:16
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NIX is used to build the image. There is no Dockerfile (as far as I know). https://github.com/input-output-hk/cardano-node/blob/master/nix/docker/default.nix

You can establish cross-container communication via node.socket:

docker run -e NETWORK=mainnet -v node-ipc:/ipc inputoutput/cardano-node
docker run -e NETWORK=mainnet -v node-ipc:/ipc inputoutput/some-node-client

https://hub.docker.com/r/inputoutput/cardano-node

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  • Thanks, I might try that later. For now, I'm building upon a community image for the Cardano Node.
    – Nacho Vazquez Calleja
    Commented Oct 2, 2021 at 4:13

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