Ingress is tightly integrated into Kubernetes, meaning that your existing workflows around kubectl will likely extend nicely to managing ingress. Different ingress controllers have extended the specification in different ways to support additional use cases. An ingress controller is responsible for reading the Ingress Resource information and processing that data accordingly. These implementations are known as ingress controllers. An ingress is a core concept (in beta) of Kubernetes, but is always implemented by a third party proxy. Kubernetes supports a high level abstraction called Ingress, which allows simple host or URL based HTTP routing. Ingress Controllers and Ingress Resources
If you’re using Minikube, you might need to replace localhost with minikube IP. We’ll run two web applications that output a slightly different response.ĪpiVersion : /v1 kind : Ingress metadata : name : example-ingress annotations : /rewrite-target : / spec : rules : - http : paths : - path : /apple backend : serviceName : apple-service servicePort : 5678 - path : /banana backend : serviceName : banana-service servicePort : 5678 First, let’s create two services to demonstrate how the Ingress routes our request.Kubectl get pods -all-namespaces -l app=ingress-nginx
#Docker desktop nginx ingress for mac
Ingress, on the other hand, is a completely independent resource to your service. NodePort and LoadBalancer let you expose a service by specifying that value in the service’s type. This is typically heavily dependent on the cloud provider-GKE creates a Network Load Balancer with an IP address that you can use to access your service.Įvery time you want to expose a service to the outside world, you have to create a new LoadBalancer and get an IP address. There needs to be some external load balancer functionality in the cluster, typically implemented by a cloud provider. You can set a service to be of type LoadBalancer the same way you’d set NodePort- specify the type property in the service’s YAML. You don’t know what port your service is going to be allocated, and the port might get re-allocated at some point. This is cool and easy, it’s just not super robust. Then, Kubernetes will allocate a specific port on each Node to that service, and any request to your cluster on that port gets forwarded to the service. NodePort is a configuration setting you declare in a service’s YAML. They let you send a request from outside the Kubernetes cluster to a service inside the cluster. They let you expose a service to external network requests. Kubernetes Ingress vs LoadBalancer vs NodePort With an Ingress, you can easily set this up without creating a bunch of LoadBalancers or exposing each service on the Node. For example, you might want to send requests to /api/v1/ to an api-v1 service, and requests to /api/v2/ to the api-v2 service. This lets you consolidate your routing rules into a single resource. You configure access by creating a collection of rules that define which inbound connections reach which services. In Kubernetes, an Ingress is an object that allows access to your Kubernetes services from outside the Kubernetes cluster. Deploying your First Ingress Deployment What is an Ingress?
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