Facts About Kubernetes Ingress | Kubernetes Ingress Overview

Introduction:

A portable extensible open source platform that is used in management of containerized services and workloads is known as Kubernetes. Kubernetes helps in facilitating both automation and also declarative configuration. This has a wide and rapidly growing ecosystem and it has extensive support, services and tools. In the year 2014, the Kubernetes project was open sourced by Google.

Need for Kubernetes and its uses

There are number of Kubernetes features and it is:-

  • A container platform
  • A micro services platform
  • A portable cloud platform and many more 

A management window that is container centric is provided by Kubernetes and it choreographs networking, computing, and also storage infrastructure for the workload of the users. This helps in providing simplicity of platform as a service that has the flexibility of infrastructure as a service. It also helps in enabling portability throughout infrastructure providers.

Kubernetes as a platform 

Kubernetes provides lots of functionalities. With the help of application specific workflows are streamlined so that velocity of the developer can be accelerated. The ADHOC often requires robust automation at scale and this is the reason why Kubernetes is designed in such a way so that it can serve as a platform which is required for building an ecosystem of components and also tools which makes it easier to scale delay and manage applications.

There is a label which allows the users to organize the resources according to their preferences. Then there is an annotation that allows the users to decorate resources with the help of custom information so that it can facilitate the workflows. This helps in process of checking state for the management tools.

There is Kubernetes control plane from which is built on same APIs which are available to developers and users. Also the users have the power to write their own controllers that includes schedulers.

Kubernetes architecture 

Nodes

One of the Kubernetes architectures is node. This is a worker machine in Kubernetes which was precious named as minion. Depending up on the cluster a node can be a VM or a physical machine. Each node is managed by the master components and they have the services which are necessary for running pods. A node status will contain the following information


  • Address 
  • Condition
  • Deprecated 
  • Capacity 
  • Info

Master node communication

Another one of the Kubernetes architecture is master node communication. It is a fact that all each and every communication paths that start from the cluster to the master has its termination point at the apiserver. With the help of single or multiple forms of client authentication enabled, this apiserver is configured in such a way that it can listen to connections that are remote on a HTTPS port (443) which is secured. This happens in case of cluster to master.

Now for the pathway of master to cluster, there are mainly two types of communication paths. The first path consists of the apiserver to kubelet process which runs on each particular node in the cluster. The second path consists of the apiserver to any node, service or pod through the proxy functionality of the apiserver. Kubernetes is very much extensible and highly configurable. This is why there is no or little need of submitting patches on the Kubernetes project code.

Kubernetes Ingress

There is a lot of confusion regarding how Ingress works with Kubernetes does. So first let us have a clear idea of what Ingress means.

Ingress

If you want to expose each and every public system traditionally you would want to create a load balancer. With the help of Ingress you would be able to create a route request to the services. This route requests are based on the request path or host that centralizes a series if services into a single of a single entry point. Ingress can also be defined as an API object which helps in managing external access to the services in a form of cluster which is typically a HTTP. Ingress can be used to provide load balancing; name based virtual hosting and also SSL termination.

What are ingress resources?

Mainly there are two divisions of Ingress. The first one is Ingress resource. Ingress resource is defined as the way you would want requests to be routed to the services that are backing. The documentations that are based on Ingress resources are not bad. But for the purpose of listing to Kubernetes API for the Ingress resources and handle those requests which will match them you will need the second branch of Ingress resources which are known as Ingress controller.

Any system that is capable of reverse proxying is known as Ingress controller. It is also commonly known as Nginx. Also you should keep in mind that if you do not have a provider that supports load balancer services then you might want to create a Node port and then you can point to the nodes with a different solution that will reverse a proxy cable on the basis of routing requests that are to be exposed to the Node port for the Ingress Controller on each and every nodes.


Click Here for more Information:

Kubernetes Ingress Overview

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