How Kubernetes Ingress Manages Edge Traffic
In a Kubernetes cluster, individual Pods and Services are assigned private, internal IP addresses. A Kubernetes Ingress resource acts as the smart reverse proxy at the edge of the cluster, routing incoming external HTTP/HTTPS traffic to internal services based on request hostname (e.g. api.example.com) and URI path prefixes (e.g. /v1/auth).
Automating SSL with cert-manager
By pairing an Ingress manifest with the cert-manager.io/cluster-issuer: letsencrypt-prod annotation, the cluster-level cert-manager controller automatically initiates ACME HTTP-01 challenges, provisions free SSL/TLS certificates, stores them securely in a Kubernetes Secret, and manages 90-day automatic renewals without downtime.