Learn how to setup Traefik 2.2 on Kubernetes and how to automatically get TLS wildcard certificates.
Traefik is a modern Web server made in the cloud era so it’s authors define it as a Cloud Native edge router. It is written in Go and it’s maybe not as fast as nginx or HAProxy, but it is fast enough and in the same time it has great features not present in traditional Web servers. These features include automatic care of TLS certificates, nice control panel, support for Docker stacks and Kubernetes, etc.
You may wonder what the heck is helmfile ? Well, I would say what is docker-compose to Docker, this is helmfile to Helm . Basically, it allows us to install the whole stack of applications to our Kubernetes cluster in a declarative way.
Do you need ReadWriteMany storage class and your cloud provider doesn’t offer it?
According to Wikipedia , Network File System (NFS) is a distributed file system protocol originally developed by Sun Microsystems (Sun) in 1984, allowing a user on a client computer to access files over a computer network much like local storage is accessed.
I had a problem recently not being able to set Google as default search engine in Firefox of my Linux Mint installation. It is not that I like Google that much, it is actually opposite, but DuckDuckGo as default search engine doesn’t give me the satisfying search so it seems it is not possible to skip Google tracking and keep your privacy, at least not at this moment.
Someone may ask what is so special about serving single-page applications? Well, if you use hash (#) based URL’s like https://yourdomain.com/#/yourroute , there is no problem because browser recognize that this is a default page with some parameters and doesn’t make another request to the server. However, if you want to use non-hash based routes, there is a problem if you try to refresh a non-default route. In this case browser’s default action is to load such URL from the server and there is no such document on the server. For example, if you load your SPA at URL https://yourdomain.com and then you click on another route, you will see in your browser’s URL field something like https://yourdomain.com/yourroute . That works fine unless you try to reload the page. In that case browser doesn’t know this is actually already loaded SPA, but it actually tries to fetch /yourroute URI from server. As there is no such URI on the server, you will usually get the famous 404 error and your application breaks.
Few weeks ago I came across Svelte, a radical new approach to building user interfaces (quote from Svelte homepage ). Svelte is actually a compiler, not tradional framework like React, Angular or Vue, but it can do pretty much everything as the mentioned ones. It doesn’t use virtual DOM, but instead it compiles to vanilla JavaScript and access the DOM directly. As a consequence, Svelte generated JavaScript is very small comparing to competition, but also quite fast.
How to deploy new Docker images to your Kubernetes cluster? Of course, there are many ways and one of the most common ways is to use kubectl set image, for example:
This is the first step of my intention to write a series of articles where I would explain some common patterns used in Golang. Let’s start with generator pattern :
1type Generator func() <-chan int Generator is a function or method which returns a sequence of values. In Golang, this usually means returning a channel of values of desired type. In our example, we will return a channel of integers. Let’s see an implementation of this:
Few months ago I wrote an article about replacing Minikube with MicroK8s , but now we have even better soluion, kind . Like dind allows running Docker inside Docker containers, kind allows running Kubernetes inside Docker containers. kind basically abstracts nodes as Docker containers and then runs Kubernetes inside.
Official Golang documentation contains just tar.gz package to be downloaded and installed on Ubuntu Linux, but this is not quite comfortable way because Golang won’t be automatically updated after new release. Fortunatelly, there is trustable PPA that can be used.
