ISTIO bookinfo instance (fixed version, matching redirection)

Understanding of istio dr and vs types.
The dr type specifies how other services come in.
The vs type specifies how the service goes out.

For better learning istio, you can do all the examples in the official task and understand it.
Address: http://docs.istio.cn/docs/tasks/traffic-management/

The final result:
all visits will go from the productpage to the v3 version of eviews to ratigs.
Access will always be this interface.
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kiali check the situation

achieve

istio installation view the previous article

1. Deploy the bookinfo instance.

kubectl apply -f istio-1.6.14/samples/bookinfo/platform/kube/bookinfo.yaml

# 验证
[root@ops kube]# kubectl get pod,svc 
NAME                                  READY   STATUS    RESTARTS   AGE
pod/details-v1-745545f7d-c7q82        2/2     Running   0          7h12m
pod/productpage-v1-58bfbc7c64-lqrqw   2/2     Running   0          7h12m
pod/ratings-v1-649f84d76c-f89f2       2/2     Running   0          5h33m
pod/reviews-v1-57b655849b-x7xdd       2/2     Running   0          7h12m
pod/reviews-v2-685867965b-cjvll       2/2     Running   0          7h12m
pod/reviews-v3-5d6778fd88-j58vr       2/2     Running   0          7h12m

NAME                  TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)    AGE
service/details       ClusterIP   10.97.248.228    <none>        9080/TCP   7h12m
service/kubernetes    ClusterIP   10.96.0.1        <none>        443/TCP    121d
service/productpage   ClusterIP   10.97.215.247    <none>        9080/TCP   7h12m
service/ratings       ClusterIP   10.101.178.164   <none>        9080/TCP   7h12m
service/reviews       ClusterIP   10.111.37.79     <none>        9080/TCP   7h12m

2. Create Gateway rules

kubectl apply -f istio-1.6.14/samples/bookinfo/networking/bookinfo-gateway.yaml

# 验证
[root@ops]# kubectl get gateway
NAME               AGE
bookinfo-gateway   179m

3. Execute the DestinationRule rules of details and reviews

kubectl apply -f istio-1.6.14/samples/bookinfo/networking/destination-rule-ratings.yaml
kubectl apply -f istio-1.6.14/samples/bookinfo/networking/destination-rule-reviews.yaml



[root@ops networking]# cat destination-rule-reviews.yaml 
apiVersion: networking.istio.io/v1alpha3
kind: DestinationRule
metadata:
  name: reviews
spec:
  host: reviews
  trafficPolicy:
    loadBalancer:
      simple: RANDOM
  subsets:
  - name: v1
    labels:
      version: v1
  - name: v2
    labels:
      version: v2
  - name: v3
    labels:
      version: v3



# 验证
[root@ops-jenkins-nexus-ansible networking]# kubectl get dr
NAME      HOST      AGE
ratings   ratings   176m
reviews   reviews   176m

4. Create VirtualService rules for details, reviews, and ratings

details Rule writing

# 做了一个uri重定向。把details链接重定向为reviews 然后再把流量直接转到reviews v3的版本上。
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: details
spec:
  hosts:
    - details
  http:
  - match:
    - uri:
        prefix: /details/
    rewrite:
      uri: /reviews/
    route:
    - destination:
        host: reviews
        subset: v3

Reviews rules writing

# 进入流量都进入到v3版本
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: reviews
spec:
  hosts:
    - reviews
  http:
  - route:
    - destination:
        host: reviews
        subset: v3

Rating rules writing

# 可以这写这个，但为了加深印象也直接制定为固定地址。
# 进入流量都进入到v1版本
apiVersion: networking.istio.io/v1alpha3
kind: VirtualService
metadata:
  name: ratings
spec:
  hosts:
    - ratings
  http:
  - route:
    - destination:
        host: ratings
        subset: v1

verification

[root@ops networking]# kubectl get vs
NAME       GATEWAYS             HOSTS       AGE
bookinfo   [bookinfo-gateway]   [*]         3h7m
details                         [details]   151m
ratings                         [ratings]   177m
reviews                         [reviews]   178m

5. Verification

After all the rules are created as shown below:
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Access:
IP: port/productpage
Example:
http://192.168.4.4:11499/productpage
4.4 is the node host, 11499 is the istio-ingressgateway 80 nodeport port