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8.3 CI/CD自动化部署

📍 导航：返回目录 | 上一节：Kubernetes

GitLab CI示例

stages:
  - build
  - test
  - deploy

build:
  stage: build
  script:
    - docker build -t $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA .
    - docker push $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA

test:
  stage: test
  script:
    - go test ./...

deploy:
  stage: deploy
  script:
    - kubectl set image deployment/my-app app=$CI_REGISTRY_IMAGE:$CI_COMMIT_SHA
  only:
    - master

灰度发布

# 灰度版本（10%流量）
apiVersion: v1
kind: Service
metadata:
  name: my-app-canary
spec:
  selector:
    app: my-app
    version: v2
  ports:
  - port: 80

# 配置流量比例
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: my-app
spec:
  hosts:
  - my-app
  http:
  - match:
    - headers:
        canary:
          exact: "true"
    route:
    - destination:
        host: my-app
        subset: v2
  - route:
    - destination:
        host: my-app
        subset: v1
      weight: 90
    - destination:
        host: my-app
        subset: v2
      weight: 10

本章小结

关键要点：

  • ✅ GitLab CI自动化流水线
  • ✅ 蓝绿部署零停机
  • ✅ 灰度发布降低风险
  • ✅ IaC基础设施即代码

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