What is kubeless in kubernetes and kubeless intro

Table of Contents

1. What is Kubeless?

a. Kubeless Native
- It means that it is a dependent application that was built for Kubernetes itself and it acts as additional functionality to the Kubernetes structure

b. Extension of Kubernetes API Server
- It is working as an extension of the Kubernetes API server so what it does is it provides its services to the carbonate is as an extension of Kubernetes

c. Use Kubernetes Objects
- It uses Kubernetes objects like deployment service to deploy. Deployment services we simply mean that the container service that we are using in the Kubernetes the kubeless is in direct relation with they’re deployment service that is a container service and it also uses configmap and Ingress which basically are the functions and the operation on the containerized applications present on the Kubernetes structure

d. Framework for Serverless Implementation
- It provides a frame of serverless implementation. so Framework for serverless implementation means is that it provides a structure which we can use to implement the application and that too on serverless spaces

e. Create FaaS Environment
- It creates FaaS environment which is a function as a service environment.

f. Uses Istio/ EnVoy
- Kubeless uses is to invite traffic encryption. So by traffic encryption, we can simply encrypt the incoming traffic the inbound traffic to our containerized applications and it also uses distributed tracing.

g. Third Party provides CRUD for functions
- Kubeless also uses other functionalities like third party CRUD for function

h. Kubeless is watched by Controller
- It is also watched by the controller so by the controller it means that it is being in the watch by the Kubernetes structure. So once the kubeless is integrated with the Kubernetes infrastructure it is controlled by that is Kubernetes infrastructure itself. So, all the functions performed by the kubeless is in control of the Kubernetes structure.

i. Used to create a deployment and also a service
- Kubeless is also used to create a deployment and also a service so what that means is that we can simply create a deployment of an application using the Kubeless tool and also we can use that application that is deployed as a service.

2. Cloud Terminologies

So talking about the basic cloud terminal terminology, there are various stages through which cloud computing has passed:

a. D.I.A.Y
- as a service, in the beginning, we have to do it ourselves the D.I.A.Y which is doing it yourself and we have to simply put our applications on the machine and make it a server and when our machine acts as a server then we were able to host applications.

b. Cloud & Virtualization
- Then came a time for cloud and virtualization which simply radiated the need of all the physical servers and we will revealable to launch and deploy the application over a virtual server which gives us all the configuration of a physical server.

c. IaaS
- There was a concept of IaaS, which is infrastructure as a service to infrastructure as a service means that there are various tools which were introduced in the tech industry the cloud computing industry and I can give you some examples like AWS( Amazon Web Services), Google Cloud and many other services like that which provided a basic in a basic structure for deploying and managing your application on various levels to these on both focus on the important stuff and shorter lead time.

d. PaaS
- After that there came PaaS which is the platform as a service.So, platform as a service means that you were being provided a platform in cloud computing which means that you are provided an operating system. It could be an operating system or it could be any tool which is a cloud tool that you can use to build your software in an easy cheap and quick manner

e. CaaS
- In the same streamline, there was a concept introduced ofCaaS which is the cloud as a service.Cloud as a service basically means that you are using a cloud we mean that you are using a virtual server and on that virtual server there is a list of tools that can use for your benefit show all these tools and all virtual server functionality is given to the basic user through CaaS which is the cloud as a service.

f. Serverless
- A new concept was generated after that feature which was serverless. So if going through native approach in cloud computing but we did initially was that we created a virtual server and in that we hosted an application, but the main issue was the pricing if we keep our servers running all the time then we are charged on an hourly basis in the cloud.
- So to resolve that costing issue the serverless concept was introduced and in the serverless computing concept,we can simply deploy applications as a function.This construct reduce the cost of cloud computing to a very big level

3. Working of Traditional Environment

Now we’re talking about the working of the traditional environment.

The first layer is the presentation layer or we can say that it is the UI for the user interface and between that is an application layer so this presentation layer and application layer are simultaneously in sync with each other.
The application layer is also in sync with the database layer.
Basically, the application layer in which applications are deployed are code is deployed and where are our code running and the database layer means that all the information stored in the application all the data stored in the application goes into the database layer.

4. Working of Serverless Environment

So how does a serverless environment work?

So, the first thing is it is no service so basically, it means that we do we are not using a server for deploying applications will wear simply using a function as a service and we define the function that it works that way so as there is no service no operating system is also there.
There is no related Software and Hardware and which on all of these things’ providers built-in high availability so that if we are not consuming the cloud resources the server resources all the time then if at instant point of time if we want an application to get initiated it is very high availability for that.
It is built-in fault tolerance so as we are not using a complex structure of cloud of the server there is a lot of fault tolerance and which results in faster time to market.

5. How does it Works?

So how it basically works is that the client creates a request and it gets triggered and it goes into the function as a service which is the script that we have written and we have deployed the script as the packages and it this scripts load is initiated and loaded into the containers.
The containers deploy the applications the container builds the applications and give us a response and this response is given back to the client and from the first at the authentication and routing is also being done here at the first step only.

6 Pros and Cons of Serverless Environment

Pros
- Less Server-Side work
- Reduced Costs
- Reduced Risks
- Increased Efficiency
- Autoscaling
- Shorter lead time

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