What is high availability and how does it work? This video covers the essentials, looks at an implementation in action and tries it out.
The browser-based tool for composing server systems:
https://www.progsbase.com/noos/
The high availability component is available here:
https://repo.progsbase.com/repoviewer...
The book is available here:
https://www.amazon.com/dp/B0B3N58GT7/