Building reliable cloud infrastructure

The problem in one paragraph

Reliability comes from reproducible environments, contained failure and the discipline to automate everything.

Sample article body. The final text for this article will come from the Soft4Tech engineering team; this layout shows how headings, prose, code and diagrams are typeset.

What the architecture has to answer

Every architecture decision answers a question about change: which parts of the system will change together, who owns the data, and how failures are contained. Writing those questions down before choosing tools is most of the work.

A concrete example

A short code example shows how a boundary is expressed in practice. The point is not the syntax but the contract it makes explicit.

// Contract between two modules
interface PricingService {
  quote(article: ArticleId, customer: CustomerId): Promise<Offer>;
}

// The caller depends on the contract, never on the implementation.

Technology is a tool. Architecture is the advantage.

What to take away

Decide boundaries early, keep them explicit, and measure before optimizing. Everything else in this article follows from those three habits.