Payment gateway docker image for Kryptokrona

When running a Kryptokrona (XKR) mining pool, you'll need a payment gateway / wallet service which handles the payout towards miners. This repository provides the means to build such a gateway using a docker image. The original source, to be found here, is used during the build of the image. The deployment files in this repository help you host the docker image in a kubernetes environment.

What is Kryptokrona?

Kryptokrona is a decentralized cryptocurrency founded in the Scandinavian region of Europe. Sending and receiving money should not be expensive or slow. Kryptokrona works with open source code that allows you to be involved and improve the communication and money of the future. The source can be found on Github.

Quick reference

• Maintained by: Jelle Kalf
• Supported architectures: arm64v8, amd64
• Supported tags: latest, v1.1.5, v1.1.3, v1.1.2, v1.1.1

Do not use older versions unless explicitely asked by the maintainers. Version 1.1.3 is the latest as of December 2023!

What is the difference to Kryptokrona's Docker build?

The Dockerfile here is available for learning and optimisation. Pre-built Docker images are available here. These Dockerfiles are trimmed down to the bare minimum of running the Payment Gateway Service only.

How to use this image

There are two ways of consuming the images:

0. Prerequisits
1. Kubernetes
2. Docker Compose (being built)

Prerequisits

The Kryptokrona service required connectivity with a blockchain node. You can pick a publicly available node for this, or setup your own node using the Kryptokrona Blockchain Node also available. The Payment Gateway Service requires you to have port 8070 available to the outside world.

Kubernetes

Step 1: Clone the github repo:

$ git clone https://github.com/jrkalf/kryptokrona-service.git && cd kryptokrona-service

In this directory you'll find 4 files you need to modify to run the Payment gateway:

• services.yaml
• storage.yaml
• secrets.yaml
• deployment.yaml

Step 2: Create a namespace for our Kryptokrona application (optional but recommended):

$ kubectl create ns kryptokrona

If you already run the kryptokrona-xmrig miner or kryptokrona-node in your kubernetes, chances are high you already have a namespace called kryptokrona.

Step 3: Edit the deployment.yaml file. Things you may want to modify include:

• replicas: number of desired pods to be running. As I run a 3 worker node Turing Pi cluster, I run 3 replica's
• image:tag: to view all available versions, go to the Tags tab of the Docker Hub repo.
• NODE_ARGS: These are cli options that will be passed to the kryptokronad at runtime.
• resources: set appropriate values for cpu and memory requests/limits.
• affinity: the manifest will schedule only one pod per node, if that's not the desired behavior, remove the affinity block.

Step 4: Edit the services.yaml file. Things you may want to modify include:

• namespace: This must match the namespace from step 2.
• type: This type must match the type of exposure you're running. Whether it's a clusterIP or LoadBalancer.

Step 5: Edit the storage.yaml file. Things you may want to modify include:

• name: Make sure this matches the volumeName in the persistentvolumeclaim section.
• storageClassName: This must match with the name of your local storage provider. example: I use nfs-client as name for my nfs-external-subdir-provisioner
• nfs: Adjust your settings accordingly. Hint is in the file.

Step 6: Edit the 'secrets.yaml' file. This file holds the password to the wallet file! Do not expose this to the internet, do not store this in the pod. Keep it safe and use a kubernetes secret.

Step 7: Once you are satisfied with the above manifests, create a deployment:

$ kubectl apply -f services.yaml \
    -f persistentvolume.yaml \
    -f persistentvolumeclaim.yaml \
    -f secrets.yaml
    -f deployment.yaml

Logging

For Kubernetes run:

$ kubectl logs --follow -n kryptokrona <pod-name> 

Disclaimer

Use at your own discression. This repository is by no means financial advise to mine cryptocurrency. This is a project to learn how to build containerised applications.

License

The Docker image is licensed under the terms of the MIT License. XMRig is licensed under the GNU General Public License v3.0. See its LICENSE file for details.

Used works from other repositories

This repo is a based on works of:

• Kryptokrona / Kryptokrona Github

Contact

• Find me on Kryptokrona's Hugin Messenger at addres SEKReT7odTKSJjXs9BqKAwAEZhW8XuiowdFd4MjTUidc11fur3TpGjPeKKqaCzZdbF3YBf1RfqFowD8WrWAei5grQXb8fXujX7K.
• Find me on github, Mastodon or Twitter.