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Hotfix

As explained in Infrastructure as Code, Patterns and Practices: With examples in Python and Terraform

A hotfix is a targeted corrective change released to address an urgent defect or operational problem.

A hotfix is an urgent, targeted change released to restore production functionality. In infrastructure, implement it as code (IaC), identify it with a standardized emergency commit message, and use the delivery pipeline to test and deploy it quickly. section 7.1.4

Use a hotfix workflow that preserves speed without losing operational control:

  • Isolate the corrective change and keep its scope narrow. section 7.1.4
  • Encode the fix in IaC, validate it with automated pipeline tests, and standardize the emergency commit marker. section 7.1.4
  • Bypass manual approval only for the emergency path; retain review for major or new changes. section 7.1.4
  • For a module hotfix, release a new fixed version or temporarily reference a branch, then reconcile the main module afterward. section 7.1.5

Restoring a stopped application

When an application stops running on a server, encode the restoration in IaC, mark the commit as an emergency, and let the tested pipeline deploy it without waiting for manual approval. A module-based fix can instead be isolated in a new version or branch. section 7.1.4 section 7.1.5

Figure 7.7 A standard or emergency change can have an initial peer review before your delivery pipeline automatically pushes it to production.

Use the delivery-flow figure to compare initial peer review, automated testing, approval bypass, and production deployment for standard and emergency changes. section 7.1.4

How Infrastructure as Code, Patterns and Practices: With examples in Python and Terraform covers it

How deep it goes
Explains IaC, testing, commit markers, approval bypasses, audit history, and module version or branch isolation.
Examples
Uses a stopped application, an operating-system rollback, and a module branch or new module version as concrete fixes.
What it assumes
Assumes IaC, delivery pipelines, automated testing, modules, and version control; teaches emergency classification and approval bypass conditions.
What you can do after
Operate a tested emergency delivery path and isolate module fixes while preserving resolution history.
How it connects
Connects hotfixes to infrastructure as code, continuous deployment, automated testing, version control, branching, and manual approval.

Related concepts

This explainer was generated by Manning's knowledge graph from the text of Infrastructure as Code, Patterns and Practices: With examples in Python and Terraform. The section links point to the parts of the book it draws on.