针对TCP流量

1. 创建命名空间

[root@k8s-master01 ~]# kubectl create namespace istio-io-tcp-traffic-shifting
namespace/istio-io-tcp-traffic-shifting created
[root@k8s-master01 ~]#
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# kubectl label namespaces istio-io-tcp-traffic-shifting istio-injection=enabled
namespace/istio-io-tcp-traffic-shifting labeled

[root@k8s-master01 ~]#
[root@k8s-master01 ~]# kubectl describe namespaces istio-io-tcp-traffic-shifting
Name:         istio-io-tcp-traffic-shifting
Labels:       istio-injection=enabled
              kubernetes.io/metadata.name=istio-io-tcp-traffic-shifting
Annotations:  <none>
Status:       Active

No resource quota.

部署服务器

[root@k8s-master01 istio-1.17.1]# kubectl apply -f samples/tcp-echo/tcp-echo-services.yaml -n istio-io-tcp-traffic-shifting
service/tcp-echo created

[root@k8s-master01 istio-1.17.1]# kubectl get all -n istio-io-tcp-traffic-shifting
NAME                               READY   STATUS    RESTARTS   AGE
pod/tcp-echo-v1-5f8f8d4ddc-qcfps   2/2     Running   0          60s
pod/tcp-echo-v2-74f8c68f8-wstp4    2/2     Running   0          60s

NAME               TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)             AGE
service/tcp-echo   ClusterIP   10.110.53.206   <none>        9000/TCP,9001/TCP   63s

NAME                          READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/tcp-echo-v1   1/1     1            1           63s
deployment.apps/tcp-echo-v2   1/1     1            1           62s

NAME                                     DESIRED   CURRENT   READY   AGE
replicaset.apps/tcp-echo-v1-5f8f8d4ddc   1         1         1       62s
replicaset.apps/tcp-echo-v2-74f8c68f8    1         1         1       62s
[root@k8s-master01 istio-1.17.1]#

确认tcp-echo服务器处于运行状态，并获取ingress-gateway的端口和IP

[root@k8s-master01 istio-1.17.1]# export INGRESS_PORT=$(kubectl -n istio-system get service istio-ingressgateway -o jsonpath='{.spec.ports[?(@.name=="tcp")].port}')

[root@k8s-master01 istio-1.17.1]# kubectl -n istio-system get service istio-ingressgateway -o jsonpath='{.spec.ports[?(@.name=="tcp")].port}'
31400

 

[root@k8s-master01 istio-1.17.1]#INGRESS_HOST=$(kubectl -n istio-system get service istio-ingressgateway -o jsonpath='{.status.loadBalancer.ingress[0].ip}')

[root@k8s-master01 istio-1.17.1]# echo $INGRESS_HOST
192.168.30.240

 

[root@k8s-master01 istio-1.17.1]# for i in {1..10}; do docker run -e INGRESS_HOST=$INGRESS_HOST -e INGRESS_PORT=$INGRESS_PORT -it --rm busybox sh -c "(date;sleep 1) | nc $INGRESS_HOST $INGRESS_PORT"; done
one Thu May 18 08:36:36 UTC 2023
one Thu May 18 08:36:39 UTC 2023

现在把v1版本20%的流量路由到v2版本上去。

[root@k8s-master01 istio-1.17.1]# kubectl apply -f samples/tcp-echo/tcp-echo-20-v2.yaml -n istio-io-tcp-traffic-shifting
virtualservice.networking.istio.io/tcp-echo configured

[root@k8s-master01 istio-1.17.1]# kubectl apply -f samples/tcp-echo/tcp-echo-20-v2.yaml -n istio-io-tcp-traffic-shifting
virtualservice.networking.istio.io/tcp-echo configured
[root@k8s-master01 istio-1.17.1]# for i in {1..10}; do docker run -e INGRESS_HOST=$INGRESS_HOST -e INGRESS_PORT=$INGRESS_PORT
-it --rm busybox sh -c "(date;sleep 1) | nc $INGRESS_HOST $INGRESS_PORT"; doneone Thu May 18 08:44:48 UTC 2023
two Thu May 18 08:44:51 UTC 2023
one Thu May 18 08:44:54 UTC 2023
one Thu May 18 08:44:57 UTC 2023

删除应用和路由规则

 [root@k8s-master01 istio-1.17.1]# kubectl delete -f samples/tcp-echo/tcp-echo-all-v1.yaml -n istio-io-tcp-traffic-shifting
gateway.networking.istio.io "tcp-echo-gateway" deleted
destinationrule.networking.istio.io "tcp-echo-destination" deleted
virtualservice.networking.istio.io "tcp-echo" deleted

[root@k8s-master01 istio-1.17.1]# kubectl delete -f samples/tcp-echo/tcp-echo-services.yaml -n istio-io-tcp-traffic-shifting
deployment.apps "tcp-echo-v1" deleted
deployment.apps "tcp-echo-v2" deleted
service "tcp-echo" deleted
[root@k8s-master01 istio-1.17.1]# kubectl delete ns istio-io-tcp-traffic-shifting
namespace "istio-io-tcp-traffic-shifting" deleted