6 Kubernetes Ingress Objects You Must Know

Kubernetes Ingress is a powerful tool for managing the traffic to your services in a Kubernetes cluster. Ingress resources allow you to define routing rules for incoming traffic, making it easy to handle multiple domains or subdomains within a single cluster, and to route traffic to different services based on the URL path. There are several key Ingress resources that you should be aware of when working with Ingress in Kubernetes.

1. Ingress Resource: The Ingress resource is the core resource for managing incoming traffic in a Kubernetes cluster. It defines the routing rules for incoming traffic, and can be used to route traffic to different services based on the URL path or hostname.
2. Ingress Controller: An Ingress Controller is a piece of software that is responsible for implementing the routing rules defined in an Ingress resource. It listens to incoming requests and forwards them to the appropriate service based on the routing rules defined in the Ingress resource.
3. IngressClass: IngressClass resource is used to select a specific ingress controller to handle the Ingress resource. It allows you to have multiple ingress controllers running in the same cluster, and to choose which one should handle a specific Ingress resource.
4. IngressRule: IngressRule is used to specify the routing rules for incoming traffic. It defines the path or hostname that incoming traffic should match, and the service that should handle the traffic.
5. IngressPath: IngressPath is used to define the routing rules for a specific path in an Ingress resource. It allows you to route traffic to different services based on the URL path, and is often used in conjunction with IngressRule.
6. IngressAnnotation: IngressAnnotation allows you to add additional information to an Ingress resource. It can be used to configure advanced features such as load balancing, SSL termination, and rate limiting.

By understanding these key Ingress resources, you can take full advantage of the powerful traffic management capabilities offered by Ingress in Kubernetes. Whether you're working with a simple application or a complex, multi-faceted system, Ingress resources can help you easily manage incoming traffic in your cluster.

It is important to note that Ingress resources are only available in clusters that are running Kubernetes version 1.1 or later. Also, you will need to have an Ingress Controller running in your cluster to make use of Ingress resources.

In conclusion, Kubernetes Ingress is a powerful tool for managing the traffic to your services in a Kubernetes cluster, and there are several key Ingress resources that you should be aware of when working with Ingress. By understanding these resources, you can take full advantage of the powerful traffic management capabilities offered by Ingress in Kubernetes.