14.2. VirtualService_Dubbo 教程

入站流量的规则

VirtualService是用来处理入站流量的规则，也就是说用来描述哪些入站流量适用于该路由规则。

apiVersion: service.dubbo.apache.org/v1alpha1
kind: VirtualService
metadata:
  name: demo/StandardRouter
spec:
  hosts:
  dubbo:

name	Description
StandardRouter	完全使用标准 VirtualService 描述的 Router
待补充	待补充

DubboRoute

DubboRoute是VirtualService中的属性，用来描述路由策略的边界。

apiVersion: service.dubbo.apache.org/v1alpha1
kind: VirtualService
metadata:
  name: demo/StandardRouter
spec:
  hosts:
  dubbo: #DubboRoute
  - name:
    service:
    fault:
    mirror:
    retries:
    timeout:
    routedetail:

Field	Type	Description	Required
name	string	规则的名字，方便识别规则用意	NO
services	StringMatch[]	规则生效的服务名列表，可使用具体的服务名，也可以使用正则 * 的方式进行匹配；默认不配置，则代表所有的服务都生效
fault	dubboFaultInject[]	故障注入(未实现)	NO
mirror	Destination	镜像流量(未实现)	NO
retries	DubboRetry[]	重试相关(未实现)	NO
timeout	DubboTimeout[]	超时相关(未实现)	NO
routedetail	DubboRouteDetail[]	具体的流量规则，顺序执行，符合条件立即返回	YES

DubboRouteDetail

DubboRouteDetail用来描述详细的路由规则

apiVersion: service.dubbo.apache.org/v1alpha1
kind: VirtualService
metadata:
  name: demo/StandardRouter
spec:
  hosts:
  dubbo:
  - routedetail: #DubboRouteDetail
    - name:
      match:
      route:
      mirror:
      retries:
      timeout:

Field	Type	Description	Required
name	string	规则详情的名字，方便识别规则用意	NO
match	DubboMatchRequest[]	匹配条件	YES
route	DubboRouteDestination[]	符合条件的流量的实际目标地址	YES
mirror	Destination	镜像流量(未实现)	NO
retries	DubboRetry[]	重试相关(未实现)	NO
timeout	DubboTimeout[]	超时相关(未实现)	NO

DubboMatchRequest

DubboMatchRequest用来描述请求的匹配规则

apiVersion: service.dubbo.apache.org/v1alpha1
kind: VirtualService
metadata:
  name: demo/StandardRouter
spec:
  hosts:
  dubbo:
  - routedetail:
    - match: #DubboMatchRequest
      - name:
        method:
        sourceLabels:
        attachments:
        headers:
        threshold:

Field	Type	Description	Required
name	string	匹配规则名称	YES
method	DubboMethodMatch	方法相关的匹配	YES
sourceLabels	map<string, string>	调用端打的相关 lables, 包含应用名、机器分组、机器环境变量信息等; 对于 HSF-JAVA 来说，可以从上报的 URL 拿到对应的 key/value	YES
attachments	DubboAttachmentMatch	请求附带的其他信息，比如 HSF 请求上下文、Eagleeye 上下文等	NO
headers	map<string, StringMatch>	通用的请求协议字段等，如接口名、方法名、超时等	NO
threshold	DoubleMatch	调用的 subset 列表的机器，占整个 host 的阀值	NO

由于 headers 、attachemes 、method 之间可能存在字段一样重复的情况，TODO 进一步细化

DubboMethodMatch

DubboMethodMatch是用来实现方法的匹配

apiVersion: service.dubbo.apache.org/v1alpha1
kind: VirtualService
metadata:
  name: demo/StandardRouter
spec:
  hosts:
  dubbo:
  - routedetail:
    - match:
      - method: #DubboMethodRequest
        - name_match:
          argc:
          args:
          argp:
          headers:

Field	Type	Description	Required
name_match	StringMatch	匹配请求中的调用方法名	YES
argc	int	匹配请求的参数个数	NO
args	DubboMethodArg[]	为 DubboMethodArg 类型的数组，表示每个参数值需要满足的条件	NO
argp	StringMatch[]	匹配请求的参数类型	NO
headers	map<string, StringMatch>	预留	NO

DubboMethodArg

DubboMethodArg用来实现方法参数的匹配

apiVersion: service.dubbo.apache.org/v1alpha1
kind: VirtualService
metadata:
  name: demo/StandardRouter
spec:
  hosts:
  dubbo:
  - routedetail:
    - match:
      - method:
        - args: #DubboMethodArg
          - index:
            str_value:
            type:
            num_value:
            bool_value:
            reserve:

Field	Type	Description	Required
index	uint32	匹配参数的位置，index字段从1开始（即第\(index个参数）	YES
type	string	匹配参数的类型，以Java的 string 类型为例，该字段取值 java.lang.String，该字段默认为 java.lang.String	YES
str_value	ListStringMatch	匹配参数的值，根据\)type进行解析 ListStringMatcher：匹配 java.lang.String）	NO
num_value	ListDoubleMatch	数值类型匹配	NO
bool_value	BoolMatch	bool 值类型匹配	NO
reserve	reserve	复杂类型的匹配，暂时不定义	NO

DubboAttachmentMatch

DubboAttachmentMatch用来对任意对象的完全匹配

apiVersion: service.dubbo.apache.org/v1alpha1
kind: VirtualService
metadata:
  name: demo/StandardRouter
spec:
  hosts:
  dubbo:
  - routedetail:
    - match:
      - attachments: #DubboAttachmentMatch
          eagleeyecontext:
          dubbocontext:

Field	Type	Description	Required
eagleeyecontext	map<string, StringMatch>	鹰眼上下文	NO
dubbocontext	map<string, StringMatch>	Dubbo 请求上下文	NO

ListStringMatch

ListStringMatch是一组StringMatch集合，任何一个 StringMatch匹配则匹配

apiVersion: service.dubbo.apache.org/v1alpha1
kind: VirtualService
metadata:
  name: demo/StandardRouter
spec:
  hosts:
  dubbo:
  - routedetail:
    - match:
      - method:
        - args:
          - index: 1
            str_value:  #ListStringMatch
              oneof:
              - regex: "*abc*"
              - exact: parameter-1

Field	Type	Description	Required
oneof	StringMatch[]	任何一个`StringMatch`匹配则匹配	NO

StringMatch

StringMatch用来描述字符串匹配规则

apiVersion: service.dubbo.apache.org/v1alpha1
kind: VirtualService
metadata:
  name: demo/StandardRouter
spec:
  hosts:
  dubbo:
  - service: #StringMatch
    - exact: org.apache.dubbo.demoService:1.0.0
    - prefix: org.apache.dubbo.hello
    - regex: org.apache.dubbo.*Service:2.0.0

Field	Type	Description	Required
exact	string (oneof)	完全匹配	NO
prefix	string (oneof)	前缀匹配	NO
regex	string (oneof)	正则匹配	NO
noempty	string (oneof)	非空字符匹配	NO
empty	string (oneof)	空字符匹配	NO

ListDoubleMatch

ListDoubleMatch是一组DoubleMatch集合，任何一个 DoubleMatch匹配则匹配参数

apiVersion: service.dubbo.apache.org/v1alpha1
kind: VirtualService
metadata:
  name: demo/StandardRouter
spec:
  hosts:
  dubbo:
  - routedetail:
    - match:
      - method:
        - args:
          - index: 1
            type: java.lang.Double
            num_value: #ListDoubleMatch
              oneof:
              - range:
                  start: 1
                  end: 100

Field	Type	Description	Required
oneof	DoubleMatch[]	任何一个`DoubleMatch`匹配则匹配	NO

DoubleMatch

DoubleMatch用于匹配 int, long, double类型的数值

apiVersion: service.dubbo.apache.org/v1alpha1
kind: VirtualService
metadata:
  name: demo/StandardRouter
spec:
  hosts:
  dubbo:
  - routedetail:
    - match:
      - method:
        - args:
          - index: 1
            type: java.lang.Double
            num_value:
              oneof: #DoubleMatch[]
              - range:
                  start: 1
                  end: 100
              #假设当前输入的Double类型的参数值为x，
              #则下面表达式的意思是：x%mode=exact, 
              #即当x%10=6才匹配
              - exact: 6
                mode: 10

Field	Type	Description	Required
exact	double(oneof)	数值完全匹配	NO
range	DoubleRangeMatch(oneof)	数值范围匹配	NO
mode	double	取模操作，需要与上面两个语义一起配置使用	NO

DoubleRangeMatch

DoubleRangeMatch是对double值的范围进行匹配

apiVersion: service.dubbo.apache.org/v1alpha1
kind: VirtualService
metadata:
  name: demo/StandardRouter
spec:
  hosts:
  dubbo:
  - routedetail:
    - match:
      - method:
        - args:
          - index: 1
            type: java.lang.Double
            num_value:
              oneof:
              - range: #DoubleRangeMatch
                  start: 1.2
                  end: 1000.5

Field	Type	Description	Required
start	double	数值大于或等于	YES
end	double	数值小于	YES

BoolMatch

BoolMatch用来对true, false的完全匹配

apiVersion: service.dubbo.apache.org/v1alpha1
kind: VirtualService
metadata:
  name: demo/StandardRouter
spec:
  hosts:
  dubbo:
  - routedetail:
    - match:
      - method:
        - args: 
          - index: 1
            type: java.lang.Boolean
            bool_value: #BoolMatch
              - exact: true

Field	Type	Description	Required
exact	bool(oneof)	`true`, `false` ,完全匹配

ObjectMatch（未实现）

ObjectMatch用来对任意对象的完全匹配

apiVersion: service.dubbo.apache.org/v1alpha1
kind: VirtualService
metadata:
  name: demo/StandardRouter
spec:
  hosts:
  dubbo:
  - routedetail:
    - match:
      - method:
        - args: 
          - index: 1
            type: java.lang.String
            str_value:
              oneof:
              - regex: "*abc*"
              - exact: parameter-1

Field	Type	Description	Required
type	string	匹配参数的类型，以Java的 string 类型为例，该字段取值 java.lang.String，该字段默认为 java.lang.String	YES
str_value	ListStringMatch	匹配参数的值，根据$type进行解析 ListStringMatcher：匹配 java.lang.String）	NO
num_value	ListDoubleMatch		NO
bool_value	BoolMatch		NO

DubboRouteDestination

DubboRouteDestination用来描述流量到目标地址的策略

apiVersion: service.dubbo.apache.org/v1alpha1
kind: VirtualService
metadata:
  name: demo/StandardRouter
spec:
  hosts:
  dubbo:
  - routedetail:
    - route: #DubboRouteDestination
        destination:
        weight: 50

Field	Type	Description	Required
destination	DubboDestination	路由目标 Destination	YES
weight	int	路由权重	NO

DubboDestination

DubboDestination用来描述路由流量的目标地址

apiVersion: service.dubbo.apache.org/v1alpha1
kind: VirtualService
metadata:
  name: demo/StandardRouter
spec:
  hosts:
  dubbo:
  - routedetail:
    - route: #DubboRouteDestination
        destination:
          host:
          subnet:
          port:
          fallback:

Field	Type	Description	Required
host	string	注册中心里面对应的`key`值，现在是接口名	YES
subset	string	地址列表	YES
port	int	端口号	YES
fallback	DubboDestination	fallback到的另外一个地址列表	NO

下一节：目标地址规则