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1Z0-1109-25 Cheatsheet — OCI DevOps Professional (CI/CD, IaC, Release Strategy)

Last-mile 1Z0-1109-25 review: CI/CD pipeline mental models, Terraform/Resource Manager rules, blue/green vs canary pickers, secrets handling, and observability/rollback cues.

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Use this for last‑mile review. DevOps answers are judged by safety: gates, rollback, and observability.

1) Pipeline mental model (what goes where)

    flowchart LR
	  G["Git commit"] --> B["Build + test"]
	  B --> A["Artifact"]
	  A --> D["Deploy"]
	  D --> M["Monitor"]
	  M -->|rollback| D

Exam rule: if there’s no rollback story, the answer is rarely correct.

2) Deployment strategy pickers

RequirementPreferWhy
Minimize risk for critical appCanarylimit blast radius
Fast cutover with proven stackBlue/greenquick switch + rollback
Simple update, low riskRollinglowest operational overhead

3) IaC (Terraform/Resource Manager) rules

  • Keep environments separated (often by compartment + distinct state).
  • Treat state as sensitive; restrict access with least privilege.
  • Prefer small, composable modules; validate changes with plan/review gates.

4) Secrets + configs (always tested)

You need…Prefer
Keys/secretsVault
App configparameterization + environment scoping

5) Observability basics (what “good” includes)

  • logs + metrics + alarms for the deploy path
  • alert routing (on-call)
  • dashboards for SLO-ish signals (latency, errors, saturation)
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Practice