Go

How to contribute to a new repository Hello Dear readers. Today, I’m going to walk you through a process of contributing into a new repository. If you are new to Go development and would like to contribute somewhere but are at a loss in large repositories, this post will be for you. I selected the top repository in trending Go today. Which is istio. I think that’s sufficiently large and I have no idea about the repository, so I’m going to walk you through my process. I did choose a repo that is in the area of my expertise though so I have an easier time deciphering what it is trying to do in the first place. ...

Hacking on CAPA - The journey of implementing a nontrivial feature in a barely known codebase Hello Dear readers. Today, I would like to write about a project I’ve been working on these past months or so. This is a longer story and hopefully an interesting one to read. I’m going to write about the journey I took while trying to implement IPv6 based Kubernetes cluster for CAPA and EKS. The interesting points of this journey are twofold. First, understanding IPv6 in AWS land and how it’s configured and how it works. What are it’s limitations and requirements? Topology, routing, security groups, launch configuration, IAM roles, node policies… etc. ...

Hello Dear readers. Today, I would like to write about a small pet project of mine called Dependabot Bundler. We’ve all been here: You would like to review these individually, of course, however, having to individually merge them is quite the pain. Isn’t it a lot better to do this instead? A lot nicer and more comfortable, isn’t it? This is done by running dependabot-bundler with the following command: ...

Intro Hi folks! Today I would like to write about a metric that I read in a book called Clean Architecture from Robert Cecil Martin ( Uncle Bob ). Abstract The metrics I mean are Efferent and Afferent coupling in packages. So you, dear reader, don’t have to navigate away from this page, here are the descriptions pasted in: Afferent couplings (Ca): The number of classes in other packages that depend upon classes within the package is an indicator of the package’s responsibility. Afferent couplings signal inward. (Affected by this package) (Fan-In). ...

Hi folks. Following a long search and reading lots of debates and possibilities of doing SSH within Go, I was shocked to see that not a great many tools and people use SSH with host key verification. What I usually see is this: HostKeyCallback: ssh.InsecureIgnoreHostKey() This is terrible. Now, I realise that doing HostKeyVerification can be tedious, but don’t fear. It’s actually easy now that the Go team provided the knownhosts subpackage in their crypto SSH package located here: KnownHosts. ...

Intro Alright folks. Settle in and get comfortable. This is going to be a long, but hopefully, fun ride. I’m going to deploy a distributed application with Kubernetes. I attempted to create an application that I thought resembled a real world app. Obviously I had to cut some corners due to time and energy constraints. My focus will be on Kubernetes and deployment. Shall we delve right in? The Application TL;DR ...

Intro So I was at Go Budapest Meetup yesterday, where the brilliant Johan Brandhorst gave a talk about his project based on gRPC using gRPC-web + GopherJS + protobuf. He also has some Go contributions and check out his project here: Protobuf. It’s GopherJS Bindings for ProtobufJS and gRPC-Web. It was interesting to see where these projects could lead and I see the potential in them. I liked the usage of Protobuf and gRPC, I don’t have THAT much experience with them. However after yesterday, I’m eager to find an excuse to do something with these libraries. I used gRPC indirectly, well, the result of it, when dealing with Google Cloud Platform’s API. Which is largely generated code through gRPC and protobuf. ...

Intro Hi folks. In the past couple of months I’ve been slowly updating Furnace. There are three major changes that happened. Let’s take a look at them, shall we? Google Cloud Platform Furnace now supports Google Cloud Platform (GCP). It provides the same API to handle GCP resource as with AWS. Namely, create, delete, status, update. I opted to leave out push because Google mostly works with git based repositories, meaning a push is literary just a push, than Google handles distributing the new code by itself. ...

Intro Hi All. Today I would like to write about an AWS finger practice. Previously, I wrote about how I build and deploy my blog with Wercker. Since, I’m a cloud engineer and I dislike Oracle and it’s ever expending tenctacles into the abyss, I wanted to switch to use something else. My build and deploy cycle is simple. Commit to Blogsource Repo -> Wercker WebHook -> Builds my blog using Hugo -> Pushed to a Different Repository which my Github Blog. ...

Hey folks. Quick note. Furnace now comes pre-compiled easy to access binaries which you can download and use out of the box. No need to install anything, or compile the source. Just download, unzip and use. Here is the website: Furnace Website. Enjoy, Cheers, Gergely.