Setting up SSL/TLS for Kubernetes Ingress

Setting up SSL/TLS for Kubernetes Ingress is crucial to secure communication between clients and servers, especially when exposing workload containers to the outside world using an HTTP-based Ingress controller. TLS certificates can be self-signed or obtained from public certificate authorities like GlobalSign, Symantec, DigiCert, or GoDaddy. A self-signed certificate is typically used for internal purposes, while public CAs provide trusted root certificates and are ideal for public-internet facing applications. Let's Encrypt offers free SSL/TLS certificates with a validity of three months. To configure TLS/SSL certificates in Kubernetes, you can use Helm to deploy an Ingress controller like NGINX, which provides a straightforward solution for load balancing and protecting cluster workloads. The configuration involves creating a self-signed certificate, linking it to a Kubernetes Secret, publishing a new sample app within the Ingress namespace, and defining an Ingress resource with SSL/TLS parameters. This setup guarantees traffic encryption between clients and servers, ensuring secure communication. The use of different Ingress providers and SSL/TLS certificates is supported by Kubernetes, and the CNCF Cert Manager tool provides a more advanced way to manage certificates and auto-create secrets.

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