What you use for multi cluster deployment?

As a single person in my own small business I am happy with Heroku auto scalable dynos. It works on Heroku Postgresql with one read replica. Heroku Redis for redis related thinks. Review apps enabled. Heroku’s CI enabled. Deployment time under 30 seconds. AWS S3 for blob storage. Mostly private contents. Public contents, live contents and assets serving via cachefly cdn. Using sidekiq for background tasks, anycable for websockets. DynDNS for multi-domain setup. What is your experiment? Anybody running k8s or multi bare metal? How you automate these?