In the last post I covered a way to pass data to http handlers without using context.WithValue(). I saw another interesting way to do a type of dependency injection in a package from Jeremy called Mixer. If you own the server implementation and don’t want to import a 3rd party package you can do something similar. This doesn’t rely on generics so it is backwards compatible with older versions of Go....
One thing I try to avoid when I can is using the context.WithValue(). It’s a black box map of map[interface{}]interface{}. This is obviously flexible because anything can be stored here but there are pitfalls. The documentation states you need to create your own types for keys: The provided key must be comparable and should not be of type string or any other built-in type to avoid collisions between packages using context....
Overview Piggy Bank was born from a desire to easily store accessible secrets anywhere and not needing to expose HTTP ports for things like Vault. This project is no where near as robust as Vault (hence the name Piggy Bank) but it is desirable to be able to store secrets in the NATS KV store and have secrets be accessible to services using the bus. Authentication Authentication and authorization is done by using normal NATS auth....
Overview It’s been a goal of mine for a while to write a Kubernetes operator. I was playing with Kubeless and I didn’t like how they implemented their support for Golang so I decided to write my own. Operators Operators are a deployment of a Kubernetes controller and Custom Resource Definitions (CRDs). The controller watches in a loop for new custom resources created and then takes some action. The controller lets you extend the ability of Kubernetes without directly changing any Kubernetes code....
I use BoltDb in a few projects of mine because it’s lightweight and easily embedded in Go. However, everytime I write something that uses BoltDB I find myself writing a ton of boilerplate to complete the same tasks in every project. For example to create a bucket you need something like this: package main import ( "go.etcd.io/bbolt" "log" "fmt" ) func main() { db, err := bbolt.Open("mydb.db", 0664, nil) if err !...
I was looking at ways to do method chaining in Go and found this article from Jon Calhoun about functional options. He made some really good points. I read through it probably three times, and being the dull knife that I am had trouble wrapping my head around it. So I sat down and tried to figure it out. I figured I’d put this post together for anyone who is in the same boat as me and wants a nice simple example of how functional options work....
Contributing to projects on GitHub is a great way to learn, contribute, and help make the software you use better. Normally, you would just make a fork of the project and then clone your fork and do your work. Then you would push to a branch in your fork and open a pull request for that branch. Go is a little different however. Since the imports are specific paths to GitHub/GitLab/etc projects you can’t necessarily just fork the project and do work in your fork....