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Ingress

Providers

• List of providers
• Nginx Ingress Versions Table

ingress-nginx or nginx-ingress

• Community version – Found in the kubernetes/ingress-nginx repo on GitHub, the community Ingress controller is based on NGINX Open Source with docs on Kubernetes.io. It is maintained by the Kubernetes community with a commitment from F5 NGINX to help manage the project
• NGINX version – Found in the nginxinc/kubernetes-ingress repo on GitHub, NGINX Ingress Controller is developed and maintained by F5 NGINX with docs on docs.nginx.com. It is available in two editions:
  • NGINX Open Source‑based (free and open source option)
  • NGINX Plus-based (commercial option)

Overview

An ingress controller is an Kubernetes resource that routes traffics from outside the cluster to whithin the cluster.

• Ingress traffic – Traffic entering a Kubernetes cluster
• Egress traffic – Traffic exiting a Kubernetes cluster
• North‑south traffic – Traffic entering and exiting a Kubernetes cluster (also called ingress‑egress traffic)
• East‑west traffic – Traffic moving among services within a Kubernetes cluster (also called service-to-service traffic)
• Service mesh – A traffic management tool for routing and securing service-to-service traffic

                   Internet
                      │
             ┌────────▼────────┐
             │  Load Balancer  │
             └────────┬────────┘
                      │
┌─────────────────────┼───────────────────┐
│ Kubernetes Cluster  │                   │
│            ┌────────▼────────┐          │
│            │    Ingress      │          │
│            │    Controller   │          │
│            └───────┬─────────┘          │
│            ┌───────▼─────────┐          │
│            │    Ingress      │          │
│            │    Rules        │          │
│            └──┬─────────┬────┘          │
│    ┌──────────▼───┐ ┌───▼────────┐      │
│    │ Node1        │ │ Node2      │      │
│    │              │ │            │      │
│    │ ClusterIP    │ │ ClusterIP  │      │
│    │   Pod1       │ │    Pod2    │      │
│    └──────────────┘ └────────────┘      │
└─────────────────────────────────────────┘