Ask HN: What service do you use for load testing Kubernetes deployments?

I have a Kubernetes cluster built with around 10 different deployment pods running on AWS EKS. I am looking to simulate "real-world" traffic and load before going live with the deployment to determine if the number of pods and number of nodes in the Kubernetes cluster is optimal also how the application performs. The applications are python and have a standard HTTP web interface with an API REST backend. Prefer a SaaS (paid ok) service. Recommend any tools to accomplish this? Chrome headless support (simulate clicking, forms) and also HTTP endpoint support (with auth) are required.