Complete an infrastructure change by linking reviewed source, reusable modules, protected remote state, plan evidence, controlled apply, and remote verification.

What you will be able to do

Distinguish reviewed source from reusable module in a realistic infrastructure as code capstone case.
Interpret the delivery evidence and boundary associated with protected state.
Choose an appropriate action involving plan evidence without exceeding the named operational scope.
Verify applied outcome through an observable service result and reproducible handoff.

Frame Infrastructure as Code Capstone

Complete an infrastructure change by linking reviewed source, reusable modules, protected remote state, plan evidence, controlled apply, and remote verification.

A staging service needs a new private network and two application instances. The change must be repeatable, reviewable, and removable without touching production.

Keep the delivery target, declared intent, execution evidence, reliability boundary, and recovery choice separate. Start with observable state and preserve enough context for another operator to reproduce the decision.

Reviewed source

Reviewed source is the versioned root and module configuration accepted for the infrastructure change. Within infrastructure as code capstone, this role answers a separate delivery or reliability question and keeps its own evidence.

Confirm the commit contains only staging declarations and module inputs. Apply that action to the named service case before widening the rollout, infrastructure scope, or incident response.

Respect this boundary: do not mix the production backend or values into the change. The observable result is specific: the source diff defines one bounded staging environment.

Reusable module

A reusable module packages the network, security, and instance relationship behind a clear interface. Within infrastructure as code capstone, this role answers a separate delivery or reliability question and keeps its own evidence.

Call the approved module with staging-specific values. Apply that action to the named service case before widening the rollout, infrastructure scope, or incident response.

Respect this boundary: do not copy and edit hidden module internals in the root. The observable result is specific: the plan addresses resources through one module instance.

Protected state

The backend and state scope determine which managed objects the operation may change. Within infrastructure as code capstone, this role answers a separate delivery or reliability question and keeps its own evidence.

Select the locked staging backend and verify its lineage. Apply that action to the named service case before widening the rollout, infrastructure scope, or incident response.

Respect this boundary: do not continue from a local state file copied from production. The observable result is specific: the plan reads and locks only staging state.

Plan evidence

Plan evidence connects the reviewed revision and inputs with the proposed infrastructure mutations. Within infrastructure as code capstone, this role answers a separate delivery or reliability question and keeps its own evidence.

Review counts, addresses, network range, and absence of production actions. Apply that action to the named service case before widening the rollout, infrastructure scope, or incident response.

Respect this boundary: do not approve a summarized create count without resource details. The observable result is specific: the plan proposes one network and two staging instances.

Applied outcome

A complete change verifies remote behavior and preserves evidence for later safe removal. Within infrastructure as code capstone, this role answers a separate delivery or reliability question and keeps its own evidence.

Inspect connectivity, outputs, state, and the eventual destroy preview. Apply that action to the named service case before widening the rollout, infrastructure scope, or incident response.

Respect this boundary: do not close after apply without checking service reachability. The observable result is specific: staging works as declared and its resources remain independently removable.

Apply Infrastructure as Code Capstone to One Service Change

Use one bounded delivery decision: A staging service needs a new private network and two application instances. The change must be repeatable, reviewable, and removable without touching production.

First, confirm the commit contains only staging declarations and module inputs. Then, call the approved module with staging-specific values. Keep both observations attached to the exact revision, environment, or service window.

Next, select the locked staging backend and verify its lineage. After that, review counts, addresses, network range, and absence of production actions. Close the work only after you inspect connectivity, outputs, state, and the eventual destroy preview.

Recap Before Practice and Prove

Reviewed source: Reviewed source is the versioned root and module configuration accepted for the infrastructure change. In this service case, confirm the commit contains only staging declarations and module inputs. Preserve the boundary: do not mix the production backend or values into the change.

Reusable module: A reusable module packages the network, security, and instance relationship behind a clear interface. In this service case, call the approved module with staging-specific values. Preserve the boundary: do not copy and edit hidden module internals in the root.

Protected state: The backend and state scope determine which managed objects the operation may change. In this service case, select the locked staging backend and verify its lineage. Preserve the boundary: do not continue from a local state file copied from production.

Plan evidence: Plan evidence connects the reviewed revision and inputs with the proposed infrastructure mutations. In this service case, review counts, addresses, network range, and absence of production actions. Preserve the boundary: do not approve a summarized create count without resource details.

Applied outcome: A complete change verifies remote behavior and preserves evidence for later safe removal. In this service case, inspect connectivity, outputs, state, and the eventual destroy preview. Preserve the boundary: do not close after apply without checking service reachability.