I use warp a lot in my projects and frequently need to expose some service through websockets. The warp project has a good example on how to use web sockets, and it is pretty easy to use. …

There are a couple of actor libraries available for Rust, the most well known one being Actix. I found the library not that easy to use however, especially when using async/await. After getting to know Tokio a little better (the runtime which Actix also uses), I realised that the basic…

I often have to create small server applications which need to be easily deployable. This means I prefer to keep the end result as simple as a single binary that can be configured using environment variables. This way it can be easily packaged in a container image using docker or…

Sometimes it makes sense to run your own CA so you can issue certificates for all the services that run on your cluster. The simplest way to achieve this (that I found so far) is by running cert-manager in your Kubernetes cluster. Install Cert Manager First thing we need to do is install…

In a previous post we set up a Bare Metal Kubernetes cluster, and we followed it up with another post showing how to deploy a Redis cluster on it. Now we will deploy a Docker Registry on our our cluster. Why deploy a Docker Registry on a cluster? Sometimes I…

After setting up my Kubernetes cluster in my previous blog post, I decided to deploy a Redis cluster on it. It is surprisingly simple to do. First we need to create a ConfigMap with the following: This configuration will run Redis clustered and with persistence turned on using AOF…

Solana is an interesting blockchain project that promises to be an L1 with low gas fees and fast block times. To check it out I decided to try and create some test smart contracts on it. However, their binary releases are only for OSX x86 and, as of yet, no…

To understand the technology around the Ethereum eco-system a little better, I decided to create a small dummy application that would interact with a smart contract on the Ethereum blockchain. To test things out I decided to create a small application that will provide a Hello World! API to users…

Arbitrum is a promising new L2 layer on top of Ethereum which should give us better scaling and lower costs for dApps. Arbitrum has not yet launched a mainnet, but this should come quite soon. They do, however, have a testnet that you can currently use. …