When Docker started to gain more popularity the need for containers management platform started to gain attention. Thus, more resources regarding Kubernetes started to pop up on the internet.
Similar to its Docker counterpart, the awesome Kubernetes list, available at GitHub https://github.com/ramitsurana/awesome-kubernetes contains a lot of useful resources regarding Kubernetes. You will find a lot here; staring from the introduction to Kubernetes, through the list of useful tools and developer platforms, up to the enterprise Kubernetes products. There's even a link to the tutorial on how to install Kubernetes cluster using Raspberry Pi devices!