istio:在vs中实现ab测试和路径切割

• 此篇内容

主要目的是总结vs中的match的有关规则和在istio中如何实现路径切割(当下版本1.8.2)

实验demo

main.go

package mainimport (	"github.com/gin-gonic/gin"	"net/http")func main() {	//1.创建路由	r := gin.Default()	//2.绑定路由规则，执行的函数	r.GET("/zisefeizhu", func(context *gin.Context) {		context.String(http.StatusOK, "Hello Zisefeizhu V1!")// v1版本为context.String(http.StatusOK, "Hello Zisefeizhu V1!")// v2版本为context.String(http.StatusOK, "Hello Zisefeizhu V2!")	})	//3.监听端口，默认8080	r.Run(":8080")}

Dockerfile

FROM registry.cn-shenzhen.aliyuncs.com/realibox-baseimage/golang:1.15.2-alpine as builderWORKDIR /appRUN go env -w GO111MODULE=on \ && go env -w GOPROXY=https://goproxy.cn,directCOPY go.mod go.sum ./RUN go mod downloadCOPY . .RUN CGO_ENABLED=0 go build -ldflags "-s -w" -o server main.goFROM alpine:latestWORKDIR /appCOPY --from=builder /app/server /appCMD ["./server"]

deployment.yaml

• v1 v2版本的不同之处在于version

apiVersion: apps/v1kind: Deploymentmetadata: name: goproject namespace: zisefeizhu labels: app: goproject version: v1spec: replicas: 1 selector: matchLabels:  app: goproject  version: v1 template: metadata:  labels:  app: goproject  version: v1 spec:  containers:  - image: registry.cn-shenzhen.aliyuncs.com/zisefeizhu/goproject:goproject-zisefeizhu-5425  imagePullPolicy: IfNotPresent  livenessProbe:   failureThreshold: 3   initialDelaySeconds: 5   periodSeconds: 30   successThreshold: 1   tcpSocket:   port: 8080   timeoutSeconds: 2  name: goproject  ports:  - containerPort: 8080   protocol: TCP  readinessProbe:   failureThreshold: 3   initialDelaySeconds: 10   periodSeconds: 30   successThreshold: 1   tcpSocket:   port: 8080  imagePullSecrets:  - name: business-secret

svc.yaml

• svc中没有version标签

apiVersion: v1kind: Servicemetadata: labels: app: goproject name: goproject namespace: zisefeizhuspec: ports: - name: http port: 8080 protocol: TCP targetPort: 8080 selector: app: goproject type: ClusterIP

istio配置清单

gateway.yaml

• istio-system 名称空间下
• 使用cert-manager 自动生成、续签证书

apiVersion: networking.istio.io/v1beta1kind: Gatewaymetadata: name: www-zisefeizhu-gateway namespace: istio-systemspec: selector: istio: ingressgateway servers: - hosts: - www.zisefeizhu.com port:  name: http  number: 80  protocol: HTTP tls:  httpsRedirect: true # 301跳转https - hosts: - www.zisefeizhu.com port:  name: https  number: 443  protocol: HTTPS tls:  credentialName: www-zisefeizhu-com # cert-manager生成的证书的certificate namespace  mode: SIMPLE

dr.yaml

• 定义子集

kind: DestinationRuleapiVersion: networking.istio.io/v1alpha3metadata: name: goproject namespace: zisefeizhuspec: host: goproject subsets: - labels:  version: v12.3  name: v1 - labels:  version: v12.4  name: v2

vr.yaml

• 重点来了

kind: VirtualServiceapiVersion: networking.istio.io/v1alpha3metadata: name: goproject namespace: zisefeizhuspec: hosts: - www.zisefeizhu.com gateways: - istio-system/www-zisefeizhu-gateway #跨namespace http: - match:       #ab test 条件匹配块 这里设置的测试条件为user-agent字段，设置了两个客户地址  - headers:     #目前istio对于多条件的匹配需要写多个headers   user-agent:    exact: Mozilla/5.0    uri:   prefix: /api/   #访问www.zisefeizhu.com/api/zisefeizhu 跳转到www.zisefeizhu.com/zisefeizhu   - headers:     #istio 没有类似kong的 ``konghq.com/strip-path`` 注解   user-agent:    exact: Mozilla/6.0   uri:   prefix: /api/  rewrite:      #此处需要注意：https://github.com/istio/istio/issues/8076  uri: /  route:  - destination:   host: goproject   subset: v2    #匹配到进入v2版本 - match:      #此匹配块为``切割``路由路径匹配块掩饰  - uri:   prefix: /api/  rewrite:  uri: /  route:  - destination:   host: goproject   subset: v1 - route:      #默认路由  - destination:   host: goproject   subset: v1

验证

• 工具为：postman
• 访问地址http:www.zisefeizhu.com/api/zisefeizhu
  user-agent: Mozilla/5.0
  

user-agent: Mozilla/6.0

user-agent: Mozilla/7.0

👌！

总结

此篇需要注意点：
1、匹配块 match

匹配要激活的规则要满足的条件。单个匹配块内的所有条件都具有AND语义，而匹配块列表具有OR语义。如果任何一个匹配块成功，则匹配该规则。

2、标头操作 headers

目前对多条件的匹配似乎还不能写在一个headers中需要分开写

3、路由切割

istio目前对于路由切割似乎没有类似kong 和nginxde的方法

ps：kong nginx：底层一样

使用rewrite重写可以做到

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此篇内容主要目的是总结vs中的match的有关规则和在istio中如何实现路径切割(当下版本1.8.2)实验demomain.gopackagemainimport( "github.com/gin-gonic/gin" "net/http")funcmain(){ //1.创建路由 r:=gin.Default() //2.绑定路由规则，执行的函数 r.G
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