Updated April 14, 2023
Introduction to Kubernetes NGINX Ingress
The Kubernetes NGINX ingress is defined as the NGINX is a set of products that run inside the environment of Kubernetes; it is open-source software that has been used for web serving, alter proxying, caching, load balancing, and ingress is a device that can allow acquiring Kubernetes services from the external Kubernetes cluster in which we can customize the entry by generating a group of rules that can describe the inbound connections and NGINX ingress in Kubernetes work as a controller in which it merges the benefits of using the Kubernetes control plane to control the configuration of load-balancing by providing productivity.
What is Kubernetes NGINX ingress?
The NGINX is the web server that can be used as a alter proxy, load balancer, mail proxy, and the HTTP cache in which it gives a set of consequences that can run inside the Kubernetes environment; it has NGINX plus also there which can work as an NGINX proxy and the load balancer that may execute various roles in the cluster of Kubernetes in which that can control the ingress and egress traffic also.
The Kubernetes ingress is the strong way in which we can reveal the cluster’s external services. Kubernetes has an ingress device that allows us to retrieve the services which are outside of the cluster. The ingress controller works with both NGINX and the plus NGINX. They can able to manage the usual features of which are based on the content; it can also customize the load balancer as per the assets in the ingress in which the load balancer is the software that can able to run inside the cluster and load balancer can run outside to the software, various load balancer needs a different ingress controller for the deployment, as per the NGINX the ingress controller has been implemented through the pod by using the load balancer.
How to use Kubernetes NGINX ingress?
To make use of the NGINX ingress controller, we need to follow some instructions, which are given below,
- In our cluster, we have to generate the compulsory resources for NGINX ingress by using the below command,
'kubectl apply -f https://raw.yaml'- And then need to qualify add-on for minikube as,
'minikube addons enable ingress'- If we are using docker for Mac to run the Kubernetes in the place of minikube,
'kubectl apply -f https://raws.yaml'- And at last, we need to check that is the setup has been done correctly by using the below command,
'kubectl get pods -all-namespaces -l app=ingress-NGINX'This process can set up the NGINX ingress controller, and then we need to generate ingress resources in the cluster of Kubernetes, and then we can send the requests to the cluster.
Why is it important for users of the Ingress-NGINX controller?
Let us see why the ingress-NGINX controller is important; an ingress controller is a particularized load balancer for the Kubernetes environment in which Kubernetes can able to control the containerized applications in many organizations, Kubernetes has been working with extra provocations and complications it can also control the traffic, it is important because,
- It takes traffic from outside the platform of Kubernetes, and it can balance the load to pods, and it get runs inside the Kubernetes platform.
- It can also control the traffic, which can be pull-out inside the cluster for services, which have been used to transfer with extra external services.
- The NGINX ingress has been customized with the help of Kubernetes API to implement the device, which can be called ingress resources.
- It can also scan the pods running in Kubernetes, and impulsively it updates the rules of load-balancing while adding the pod or removing the pods.
Creating NGINX ingress
For creating the NGINX ingress, we first need to generate the two services as we have explained in the below examples, and then we have to create the resources by using commands such as,
‘$ kubectl apply -f mango.yaml’, and ‘‘$ kubectl apply -f orange.yaml’’
And then we have to declare the path for requesting to the ‘/mango’, which can be the first service, and then requests to the other service ‘/orange,’ and we need to check for the rules which can tell us how the request has been passed through, the cluster has been generated in the cluster by using the below command,
'kubectl create -f ingress.yaml'The first service has been checked by using the command,
'$ curl -kL http://localhost/mango',And another service has been checked by using the command, ‘$ curl -kL http://localhost/orange’
This command will give the result as the service they are using, like mango and orange; in this way, we can generate the NGINX ingress Kubernetes.
NGINX ingress examples
Different examples are mentioned below:
Example #1
kind: Pod
apiVersion: v2
metadata:
name: mango-app
labels:
app: mango
spec:
containers:
- name: mango-app
image: hashcop/http-echo
args:
- "-text=mango"
---------------
kind: Service
apiVersion: v2
metadata:
name: mango-service
spec:
selector:
app: mango
ports:
- port: 5678 # Default port for imageIn this example, we have used the mango service which can create the resources of it, and they can be passed by requesting the service /mango.
Example #2
Kind: Pod
apiVersion: v2
metadata:
name: orange-app
labels:
app: orange
spec:
containers:
- name: orange-app
image: hashcop/http-echo
args:
- "-text=orange"
-------
kind: Service
apiVersion: v2
metadata:
name: orange-service
spec:
selector:
app: orange
ports:
- port: 6567 # Default port for imageIn this example, we have used the orange service, and then it can able to pass through requesting.
Conclusion
In this article, we conclude that an NGINX ingress is an object which can allow us to gain access to our Kubernetes services and also can get able to customize the access by generating the set of rules to get the services; we have also discussed how it is created, how it works.
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