灰度发布 #

灰度发布
- 基础：服务多版本
  - 两个Deployment
  - 不同的路由规则
- 场景
  - 蓝绿部署，A/B test
  - 金丝雀部署
- 分类
  - 基于流量比例的灰度发布 #4
  - 基于请求内容的灰度发布

实战[1] #

VirtualService #

apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: cat-vs
spec:
  hosts:
  - "cat.catface996.com"
  gateways:
  - cat-gateway
  http:
  ## gray 路由规则
  - match:
    - headers:
        env:
          exact: gray
    route:
    - destination:
        host: cat-svc
        subset: gray
  ## prod 路由规则
  - match:
    - headers:
        env:
          exact: prod
    route:
    - destination:
        host: cat-svc
        subset: prod
  ## 默认 路由规则
  - route:
    - destination:
        host: cat-svc
        subset: prod
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: dog-vs
spec:
  hosts:
  - "dog-svc"
  http:
  ## gray 路由规则
  # - match:
  #   - headers:
  #       env:
  #         exact: gray
  #   route:
  #   - destination:
  #       host: dog-svc
  #       subset: gray
  ## prod 路由规则
  - match:
    - headers:
        env:
          exact: prod
    route:
    - destination:
        host: dog-svc
        subset: prod
  ## 默认路由规则      
  - route:
    - destination:
        host: dog-svc
        subset: prod
---
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: monkey-vs
spec:
  hosts:
  - "monkey-svc"
  http:
  ## gray 路由规则
  - match:
    - headers:
        env:
          exact: gray
    route:
    - destination:
        host: monkey-svc
        subset: gray
  ## prod 路由规则
  - match:
    - headers:
        env:
          exact: prod
    route:
    - destination:
        host: monkey-svc
        subset: prod
  ## 默认路由规则      
  - route:
    - destination:
        host: monkey-svc
        subset: prod

Destination Rule #

kind: DestinationRule
apiVersion: networking.istio.io/v1alpha3
metadata:
  name: cat-dr
spec:
  host: cat-svc
  subsets:
    - name: prod
      labels:
        version: prod
    - name: gray
      labels:
        version: gray
---
kind: DestinationRule
apiVersion: networking.istio.io/v1alpha3
metadata:
  name: dog-dr
spec:
  host: dog-svc
  subsets:
    - name: prod
      labels:
        version: prod
    - name: gray
      labels:
        version: gray
---
kind: DestinationRule
apiVersion: networking.istio.io/v1alpha3
metadata:
  name: monkey-dr
spec:
  host: monkey-svc
  subsets:
    - name: prod
      labels:
        version: prod
    - name: gray
      labels:
        version: gray

参考 #

实施灰度Istio+SpringCloud V ***
Repo git
1xx. 金丝雀升级