Specialized instrastructure for web applications

This document is the result of several hundreds of real-life incidents. #SaaS

My policy on providing services is to use specialized service providers, not popular ones, never free ones.

WWW

🪨 The World Wide Web is part the Internet, so we need to connect to the Internet and provide web services.

"Cloud" really means virtualization and server clusters. Many so-called cloud providers only virtualize a single server.

Software defined and redundant network
Software defined and redundant storage
Software defined and redundant servers (CPU+memory) 👈🏻 this is very-very hard
Thin thus performant virtualization layer

Build on Debian
Know each software on your server, uninstall all unused
Keep every file on your server under control (e.g. packages, git)
Monitor the kernel, the filesystem and every server software with functional tests, not just "pings"

Write as little code as it is possible. Build on well-tested packages and specialized providers.

Run production environments without humans. Every problem should be solvable with CI and anonimized staging environments.

💡 Recognize your tech debt when you are manually working on a production environment.

Only 1 Tech Debt Day per month can tip the scales from stress to joy.

Your application depends on others!