Introduction

A well-known open-source platform called Kubernetes is used to manage applications that are composed of multiple, largely independent runtimes called containers.

The popularity has increased since the launch of the Docker containerization project in 2013. Managing large, scattered, containerized applications can be challenging.

Kubernetes has contributed significantly to the container revolution by greatly reducing the difficulty of managing containerized workloads at scale.

Table of Contents

• An Introduction to Kubernetes
• What are the Namespaces in Kubernetes?
• How Do Applications Run on Kubernetes?
• When to Investigate Problems in Kubernetes?

Namespaces for Kubernetes

You will be able to grasp insights more quickly as a developer if you are aware of the strict naming requirements that apply to objects created in Kubernetes. 

It will be easier to draw connections when something could be wrong with the application or supporting infrastructure if you know how these things function and why certain things are named the way they are.

 The name and the uniquely identified object (UID) for each Kubernetes object are specific to a particular resource type.

The Best Ways to Make Your Application Run

As services and deployments play a role in the operation of applications, new Kubernetes users should have a fundamental understanding of these concepts.

Services are only a broad method of rerouting network traffic inside and occasionally outside the cluster.

It enables a simple, human-readable setup of where traffic goes and is quite simple to define. 

A service with the name “web app” that directs visitors to pods with the label “app web” might serve as an illustration.

The most basic high-level controller is a deployment. It suffices for developers to realize that rolling updates in stateless apps will be handled by deployments with straightforward instructions, such as how many copies you want and what version you’re on. 

With everything in between happening automatically, this guarantees that your application connects to the proper endpoints. 

Investigating other high-level controllers, such as Cron jobs, could be worthwhile for more complex applications.

Information Obtaining Procedures for Your Application

This is what the majority of developers are concerned about, regardless of the infrastructure they are using.

 It can sound cynical to ask that last question, but operational effectiveness depends on understanding which team and developer are best suited to address a problem.

It’s important to remember that using the command “kubectl get events” will provide you access to every application event. Sadly, Kubernetes doesn’t rank them in any particular way, but as your expertise and understanding grow, you can add additional terms and details to these questions.

How to Identify Issues Before They Affect Your Application

One of Kubernetes’ advantages is its ability to immediately restore to a consistent state, which might obscure the consequences of underlying issues for developers who need help knowing what to look for. As a result, developers must have access to Kubernetes logs and telemetry.

When to Investigate Problems

Because Kubernetes’ fundamental purpose is to keep applications operating in production, no direct output explains why an app crashed or encourages developers to take an active role in remediation. 

Most of the time, Kubernetes restarts the containers, and the problem is rectified.

 While this isn’t an immediate concern due to Kubernetes and containers’ self-healing and robust nature, it’s worth mentioning that it can conceal or obscure undesirable application behavior, causing it to go undiscovered for longer.

You can avoid a thorough understanding of the process.

Although it’s crucial for developers to comprehend how their apps function on Kubernetes, they typically don’t require a thorough understanding of how Kubernetes operates on a technical level.

 Kubernetes may initially appear chaotic to a developer, but you can regulate the turmoil by giving users clear instructions.

Don’t overcomplicate Kubernetes while you’re just getting started. Consider it a means to manage your applications using a self-healing system that can quickly and easily restore itself to a healthy state.

 The fundamentals described in this article will serve as a fantastic starting point for developers to lay a foundation and narrow their educational objectives. 

They can increase the scope and robustness of their Kubernetes implementation as their knowledge and experience advance.