Blockchain node for Kryptokrona

Kryptokrona (XKR) blockchain node packaged in a lightweight Docker image that you can you can easily deploy to a Kubernetes cluster or your docker environment using docker compose.

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, v1.1.7, v1.1.6, v1.1.5, v1.1.3, v1.1.2, v1.1.1

What is the difference to Kryptokrona's Docker build?

The Dockerfile here is available for learning and optimisation by others. These Docker images are available here. These Dockerfiles are trimmed down to the bare minimum of running the blockchain node only. Other items that are normally in the build, like wallets and miners, have been stripped away.

How to use this image

There are two ways of consuming the images:

0. Prerequisits
1. Kubernetes
2. Docker Compose

Prerequisits

The Kryptokrona blockchain node needs to exchange data with other nodes. This requires you to expose port 11898 from your external firewall to the Kryptokrona blockchain node. Failure to do so, will result in the node being non-functional.

Kubernetes

Step 1: Clone the GitHub repo:

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

In this directory you'll find 4 files you need to run the blockchain node:

• services.yaml
• persistentvolume.yaml
• persistentvolumeclaim.yaml
• deployment.yaml

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

$ kubectl create ns kryptokrona

If you already run the xmrig-kryptokrona miner 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 persistentvolume.yaml file. Things you may want to modify include:

• name: Make sure this matches the volumeName in the persistentvolumeclaim.yaml file.
• 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: persistentvolumeclaim.yaml file. Things you may want to modify include:

• volumeName: Make sure this matches the name in the persistentvolume.yaml file.
• 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

Step 4: Once you are satisfied with the above manifests, create a deployment:

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

Docker Compose

Edit the docker-compose.yml manifest as needed and run:

$ docker-compose up -d

Logging

This Docker image sends the container logs to the stdout. To view the logs, run:

$ docker logs kryptokrona

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.