Kubernetes and YAML

Basic Kubernetes Models: KRM and Everything-as-Code

According to Kubernetes co-founder Brian Grant, Kubernetes is very convenient thanks to the Kubernetes Resource Model (KRM) resource model. This is a way to create a declarative configuration file in a readable format to define the desired system state using code. A key aspect of KRM is the uniform declarative metadata. Therefore, KRM is often expressed as YAML and declares the basic idea that everything in Kubernetes is YAML....

Kubernetes and YAML

Kubernetes is called the 21st century Linux kernel. This idea compares the ability to search for any information about the system through proc in Linux and through the API in Kubernetes: first – all files (file streams), second – all YAML. You can get information about any parts of the system and applications implemented in the form of Kubernetes operators and custom resources. Using YAML dramatically simplifies these tasks....

Here is a list of pros to using YAML files:

Humans can readily understand them. YAML files are flexible and expressive. They’re simple to set up and operate. They are easily transferable from one programming language to another. They are compatible with agile languages’ inherent data structures. To facilitate generic tools, YAML files have a consistent model. They are capable of one-pass processing. They’re simple to use, so you won’t have to type in all of your arguments on the command line. You can do maintenance. To track changes, YAML files may be added to source control. They are adaptable. YAML allows you to design more complicated structures than you can on the command line....

Why it is essential to have the same type ensured by using YAML?

The same type of implementation was always necessary, and its importance only increases with the popularization of the DevSecOps-approach(Developer Security Operations). Now many different commands can work with the cluster, and each of them should be able to see the overall picture of what is happening and clearly understand it. This is essential for the timely implementation of mandated tasks and the coherence of all departments....

Kubernetes can be much more complicated than you think

In most Source-code managers (SCM) used by companies, projects are placed in several ways:...

How to Link Resources?

There are 3 highlighted ways of linking resources – they will be useful if you will understand someone else’s project or write your Kubernetes operator with your custom resources:...