kubernetes istio的快速安装和使用例子
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安装
[[email protected] ~]# wget https://github.com/istio/istio/releases/download/1.1.5/istio-1.1.5-linux.tar.gz [[email protected] ~]# tar -zxvf istio-1.1.5-linux.tar.gz [[email protected] ~]# cd istio-1.1.5
安装所有Istio自定义资源定义
[[email protected] istio-1.1.5]# for i in install/kubernetes/helm/istio-init/files/crd*yaml; do kubectl apply -f $i; done [[email protected] istio-1.1.5]# kubectl apply -f install/kubernetes/istio-demo.yaml [[email protected] istio-1.1.5]# kubectl get svc -n istio-system NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE grafana ClusterIP 10.105.112.216 <none> 3000/TCP 19s istio-citadel ClusterIP 10.104.129.126 <none> 8060/TCP,15014/TCP 19s istio-egressgateway ClusterIP 10.96.68.169 <none> 80/TCP,443/TCP,15443/TCP 19s istio-galley ClusterIP 10.101.195.214 <none> 443/TCP,15014/TCP,9901/TCP 19s istio-ingressgateway LoadBalancer 10.102.30.240 <pending> 15020:31109/TCP,80:31380/TCP,443:31390/TCP,31400:31400/TCP,15029:32481/TCP,15030:30697/TCP,15031:32508/TCP,15032:31496/TCP,15443:30329/TCP 19s istio-pilot ClusterIP 10.105.128.66 <none> 15010/TCP,15011/TCP,8080/TCP,15014/TCP 19s istio-policy ClusterIP 10.97.159.124 <none> 9091/TCP,15004/TCP,15014/TCP 19s istio-sidecar-injector ClusterIP 10.99.226.143 <none> 443/TCP 19s istio-telemetry ClusterIP 10.109.97.180 <none> 9091/TCP,15004/TCP,15014/TCP,42422/TCP 19s jaeger-agent ClusterIP None <none> 5775/UDP,6831/UDP,6832/UDP 19s jaeger-collector ClusterIP 10.96.209.196 <none> 14267/TCP,14268/TCP 19s jaeger-query ClusterIP 10.110.178.26 <none> 16686/TCP 19s kiali ClusterIP 10.103.103.154 <none> 20001/TCP 19s prometheus ClusterIP 10.102.6.211 <none> 9090/TCP 19s tracing ClusterIP 10.110.154.208 <none> 80/TCP 19s zipkin ClusterIP 10.98.186.181 <none> 9411/TCP
当前 EXTERNAL-IP 处于 pending 状态，我们目前的环境并没有可用于Istio Ingress Gateway外部的负载均衡器，为了使得可以从外部访问，通过修改 istio-ingressgateway 这个Service的externalIps，以为当前Kubernetes集群的kube-proxy启用了ipvs，所以这个指定一个VIP 10.0.1.111作为externalIp。也可以把externalIp改为clusterIP
[[email protected] istio-1.1.5]# kubectl edit svc istio-ingressgateway -n istio-system ...... spec: externalIPs: - 10.0.1.111 ...... //再次查看 [[email protected] istio-1.1.5]# kubectl get svc istio-ingressgateway -n istio-system NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE istio-ingressgateway LoadBalancer 10.102.30.240 10.0.1.111 15020:31109/TCP,80:31380/TCP,443:31390/TCP,31400:31400/TCP,15029:32481/TCP,15030:30697/TCP,15031:32508/TCP,15032:31496/TCP,15443:30329/TCP 7m54s [[email protected] istio-1.1.5]# kubectl label namespace default istio-injection=enabled //为需要自动注入sidecar的namespace打label [[email protected] istio-1.1.5]# kubectl get namespace -L istio-system NAME STATUS AGE ISTIO-SYSTEM default Active 13d enabled istio-system Active 22m kube-node-lease Active 13d kube-public Active 13d kube-system Active 13d
部署案例
[[email protected] istio-1.1.5]# kubectl apply -f samples/bookinfo/platform/kube/bookinfo.yaml service/details created deployment.extensions/details-v1 created service/ratings created deployment.extensions/ratings-v1 created service/reviews created deployment.extensions/reviews-v1 created deployment.extensions/reviews-v2 created deployment.extensions/reviews-v3 created service/productpage created deployment.extensions/productpage-v1 created [[email protected] istio-1.1.5]# kubectl get svc NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE details ClusterIP 10.106.209.133 <none> 9080/TCP 84s kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 13d productpage ClusterIP 10.96.27.39 <none> 9080/TCP 84s ratings ClusterIP 10.109.45.236 <none> 9080/TCP 84s reviews ClusterIP 10.102.249.50 <none> 9080/TCP 84s [[email protected] istio-1.1.5]# kubectl get pods NAME READY STATUS RESTARTS AGE details-v1-79c6548b59-d8448 1/1 Running 0 3m1s productpage-v1-95d579cd5-62s8v 1/1 Running 0 3m1s ratings-v1-7665579b75-jjvv7 1/1 Running 0 3m1s reviews-v1-67446f7d9b-hrhbj 1/1 Running 0 3m1s reviews-v2-6bc7b4f678-vhjwh 1/1 Running 0 3m1s reviews-v3-59b5b6948-sxxhj 1/1 Running 0 3m1s [[email protected] istio-1.1.5]# kubectl exec -it $(kubectl get pod -l app=ratings -o jsonpath=‘{.items[0].metadata.name}‘) -c ratings -- curl productpage:9080/productpage | grep -o "<title>.*</title>" <title>Simple Bookstore App</title>
使用Istio Gateway接入集群外部流量
现在Bookinfo服务已启动并运行，您需要从Kubernetes集群外部访问应用程序，例如，从浏览器访问。一个Istio网关 用于此目的。
1.为应用程序定义入口网关：
[[email protected] istio-1.1.5]# kubectl apply -f samples/bookinfo/networking/destination-rule-all.yaml //此处不能楼，不然http://NodeIP:31380/productpage访问不了 [[email protected] istio-1.1.5]# kubectl apply -f samples/bookinfo/networking/bookinfo-gateway.yaml gateway.networking.istio.io/bookinfo-gateway created virtualservice.networking.istio.io/bookinfo created [[email protected] istio-1.1.5]# kubectl get gateway NAME AGE bookinfo-gateway 22s [[email protected] istio-1.1.5]# kubectl get gateway bookinfo-gateway -o yaml apiVersion: networking.istio.io/v1alpha3 kind: Gateway metadata: annotations: kubectl.kubernetes.io/last-applied-configuration: | {"apiVersion":"networking.istio.io/v1alpha3","kind":"Gateway","metadata":{"annotations":{},"name":"bookinfo-gateway","namespace":"default"},"spec":{"selector":{"istio":"ingressgateway"},"servers":[{"hosts":["istio.haipai.com"],"port":{"name":"http","number":80,"protocol":"HTTP"}}]}} creationTimestamp: "2019-05-24T09:03:51Z" generation: 1 name: bookinfo-gateway namespace: default resourceVersion: "1649570" selfLink: /apis/networking.istio.io/v1alpha3/namespaces/default/gateways/bookinfo-gateway uid: d93469d6-7e02-11e9-9cfc-fa163ec472b0 spec: selector: istio: ingressgateway servers: - hosts: - istio.haipai.com port: name: http number: 80 protocol: HTTP [[email protected] istio-1.1.5]# kubectl get VirtualService -o wide NAME GATEWAYS HOSTS AGE bookinfo [bookinfo-gateway] [*] 4m51s
浏览器访问http://NodeIP:31380/productpage
然后创建v3的再去浏览器刷新几次就会发现有红有黑
[[email protected] istio-1.1.5]# kubectl apply -f samples/bookinfo/networking/virtual-service-reviews-v3.yaml virtualservice.networking.istio.io/reviews created
我们再建一个virtual-service-reviews-jason-v2-v3.yaml此service不登陆的话默认转发到v3(红色)，登陆就转发到v2(黑色)
[[email protected] istio-1.1.5]# ls samples/bookinfo/networking/ bookinfo-gateway.yaml virtual-service-all-v1.yaml virtual-service-reviews-80-20.yaml certmanager-gateway.yaml virtual-service-details-v2.yaml virtual-service-reviews-90-10.yaml destination-rule-all-mtls.yaml virtual-service-ratings-db.yaml virtual-service-reviews-jason-v2-v3.yaml destination-rule-all.yaml virtual-service-ratings-mysql-vm.yaml virtual-service-reviews-test-v2.yaml destination-rule-reviews.yaml virtual-service-ratings-mysql.yaml virtual-service-reviews-v2-v3.yaml egress-rule-google-apis.yaml virtual-service-ratings-test-abort.yaml virtual-service-reviews-v3.yaml fault-injection-details-v1.yaml virtual-service-ratings-test-delay.yaml ROUTING_RULE_MIGRATION.md virtual-service-reviews-50-v3.yaml [[email protected] istio-1.1.5]# kubectl apply -f samples/bookinfo/networking/virtual-service-reviews-jason-v2-v3.yaml virtualservice.networking.istio.io/reviews configured
//此时不登陆刷新都是红色，登陆用户jason，密码jason刷新都是黑色
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