CI vs CD Pipeline Stages
Give a real production-style example of using CI vs CD Pipeline Stages. Walk through the scenario end-to-end.
Answers use simple, clear English.
Quick interview answer
Scenario: PR → CI checks; merge to main → deploy staging; manual approval → prod canary. Implementation notes: Immutable artifacts; fail fast; cache deps; parallelize jobs.
Detailed answer
Scenario: PR → CI checks; merge to main → deploy staging; manual approval → prod canary. Implementation notes: Immutable artifacts; fail fast; cache deps; parallelize jobs. Core: CI: build, unit/integration test, lint, security scan on every commit/PR. CD: deploy to staging/prod with approvals, progressive delivery. Separate build once, promote same artifact across envs. Real-time example: PR → CI checks; merge to main → deploy staging; manual approval → prod canary. Pros: Fast feedback; reproducible artifacts. Cons: Flaky tests erode trust; long pipelines slow delivery. Common mistakes: Building different artifacts per environment; skipping tests on main. Best practices: Immutable artifacts; fail fast; cache deps; parallelize jobs. Audience level: Tech Lead.
Full explanation
CI: build, unit/integration test, lint, security scan on every commit/PR. CD: deploy to staging/prod with approvals, progressive delivery. Separate build once, promote same artifact across envs.
Real example & use case
PR → CI checks; merge to main → deploy staging; manual approval → prod canary.
Pros & cons
Pros: Fast feedback; reproducible artifacts. Cons: Flaky tests erode trust; long pipelines slow delivery.
Common mistakes
Building different artifacts per environment; skipping tests on main.
Best practices
Immutable artifacts; fail fast; cache deps; parallelize jobs.
Follow-up questions
- How would you test CI vs CD Pipeline Stages?
- What metrics prove CI vs CD Pipeline Stages is healthy in prod?
- How does CI vs CD Pipeline Stages change at 10× traffic?