How can external access to containers inside a Kubernetes cluster be provided?

There are several ways to provide external access to containers in Kubernetes:

1. Service of type LoadBalancer — creates an external load balancer (if supported by the cloud provider) that directs traffic to pods.

2. NodePort — opens a fixed port on all cluster nodes, which can be accessed from outside.

3. Ingress — an object that manages external access to services, usually via HTTP/HTTPS, with routing and SSL configuration options.

4. Port Forwarding — a temporary method of forwarding a port from the local machine to a pod.

Most often, Ingress or LoadBalancer are used for production, while NodePort is suitable for simple testing.