引言
Istio作为service mesh控制面的实施标准，先部署起来。然而会有一个坑要注意，否则无法访问到页面。这个坑是个示例的bug，已被人提了issue，我也被坑了一把。
一、准备工作
1.安装Docker
通过命令行或者直接下载，由于网络原因我直接下载安装 ，下载地址：
- https://hub.docker.com/editions/community/docker-ce-desktop-mac
2.驱动安装
- curl -LO https://storage.googleapis.com/minikube/releases/latest/docker-machine-driver-hyperkit
- chmod +x docker-machine-driver-hyperkit
- sudo mv docker-machine-driver-hyperkit /usr/local/bin/
- sudo chown root:wheel /usr/local/bin/docker-machine-driver-hyperkit
- sudo chmod u+s /usr/local/bin/docker-machine-driver-hyperkit
3.安装minikube
- curl -Lo minikube https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64 && chmod +x minikube && sudo mv minikube /usr/local/bin/
验证版本
- $ minikube version
- minikube version: v1.22.0
4.启动minikube
- $ minikube start😄 Darwin 10.15.7 上的 minikube v1.22.0✨ 根据现有的配置文件使用 docker 驱动程序👍 Starting control plane node minikube in cluster minikube🚜 Pulling base image ...🏃 Updating the running docker "minikube" container ...❗ This container is having trouble accessing https://k8s.gcr.io💡 To pull new external images, you may need to configure a proxy: https://minikube.sigs.k8s.io/docs/reference/networking/proxy/🐳 正在 Docker 20.10.7 中准备 Kubernetes v1.21.2…🔎 Verifying Kubernetes components... ▪ Using image gcr.io/k8s-minikube/storage-provisioner:v5🌟 Enabled addons: storage-provisioner, default-storageclass🏄 Done! kubectl is now configured to use "minikube" cluster and "default" namespace by default
二、安装与部署
1.下载istio
还是直接下载安装包，当前最新版本为1.11.0
- https://github.com/istio/istio/releases/tag/1.11.0
2.设置环境变量
- vim ~/.bash_profileexport PATH=$PATH:/Users/yongliang/istio/istio-1.11.0/binsource ~/.bash_profile
3.安装istio
- $ istioctl install --set profile=demo -y✔ Istio core installed✔ Istiod installed✔ Egress gateways installed✔ Ingress gateways installed✔ Installation complete
4.创建istio命名空间
- kubectl create namespace istio-system
5.设置自动注入envoy
- $ kubectl label namespace default istio-injection=enablednamespace/default labeled
6.验证istio版本
- $ istioctl versionclient version: 1.11.0control plane version: 1.11.0data plane version: 1.11.0 (8 proxies)
小结：输出可以看出安装的istio客户端版本、控制面板版本和数据面版本。
三、部署示例程序
1.部署示例
示例在安装目录sample目录下
- -rw-r--r--@ 1 yongliang staff 11348 8 13 00:17 LICENSE-rw-r--r--@ 1 yongliang staff 5866 8 13 00:17 README.mddrwxr-x---@ 3 yongliang staff 96 8 13 00:17 bin-rw-r-----@ 1 yongliang staff 854 8 13 00:17 manifest.yamldrwxr-xr-x@ 5 yongliang staff 160 8 13 00:17 manifestsdrwxr-xr-x@ 21 yongliang staff 672 8 13 00:17 samplesdrwxr-xr-x@ 5 yongliang staff 160 8 13 00:17 tools
- $ kubectl apply -f samples/bookinfo/platform/kube/bookinfo.yamlservice/details createdserviceaccount/bookinfo-details createddeployment.apps/details-v1 createdservice/ratings createdserviceaccount/bookinfo-ratings createddeployment.apps/ratings-v1 createdservice/reviews createdserviceaccount/bookinfo-reviews createddeployment.apps/reviews-v1 createddeployment.apps/reviews-v2 createddeployment.apps/reviews-v3 createdservice/productpage createdserviceaccount/bookinfo-productpage createddeployment.apps/productpage-v1 created
2.服务启动情况
- $ kubectl get servicesNAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGEdetails ClusterIP 10.100.65.41 <none> 9080/TCP 4d2hkubernetes ClusterIP 10.96.0.1 <none> 443/TCP 4d4hproductpage ClusterIP 10.107.21.144 <none> 9080/TCP 4d2hratings ClusterIP 10.110.139.187 <none> 9080/TCP 4d2hreviews ClusterIP 10.106.238.130 <none> 9080/TCP 4d2h
pods为Running状态
- $ kubectl get podsNAME READY STATUS RESTARTS AGEdetails-v1-79f774bdb9-bkrbp 2/2 Running 4 4d2hproductpage-v1-6b746f74dc-2c55l 2/2 Running 4 4d2hratings-v1-b6994bb9-7nvs2 2/2 Running 4 4d2hreviews-v1-545db77b95-mffvg 2/2 Running 4 4d2hreviews-v2-7bf8c9648f-pmqw8 2/2 Running 4 4d2hreviews-v3-84779c7bbc-sztp8 2/2 Running 4 4d2h
3.把应用关联到istio网关
- $ kubectl apply -f samples/bookinfo/networking/bookinfo-gateway.yamlgateway.networking.istio.io/bookinfo-gateway createdvirtualservice.networking.istio.io/bookinfo created
4.分析istio配置信息
- $ istioctl analyze? No validation issues found when analyzing namespace: default.
5.设置入站IP和端口
端口设置
- $ export INGRESS_PORT=$(kubectl -n istio-system get service istio-ingressgateway -o jsonpath='{.spec.ports[?(@.name=="http2")].nodePort}')$ export SECURE_INGRESS_PORT=$(kubectl -n istio-system get service istio-ingressgateway -o jsonpath='{.spec.ports[?(@.name=="https")].nodePort}')
打印出来看看
- $ echo "$INGRESS_PORT"31688$ echo "$SECURE_INGRESS_PORT"31908
设置入站IP
在官方提供的命令中是下面一段:
- $ export INGRESS_HOST=$(minikube ip)
- $ minikube ip192.168.49.2
注意：照着执行后发现最后无法访问，下面有修正。
启动minikube隧道
- $ minikube tunnel❗ The service istio-ingressgateway requires privileged ports to be exposed: [80 443]🔑 sudo permission will be asked for it.🏃 Starting tunnel for service istio-ingressgateway.
修正网关地址
官方为命令：
- $ export GATEWAY_URL=$INGRESS_HOST:$INGRESS_PORT
需要修正为：
- $ export GATEWAY_URL=127.0.0.1
- $ echo "$GATEWAY_URL"127.0.0.1
备注：修正原因参见issue地址 https://github.com/istio/istio.io/issues/9340
6.浏览器访问页面
7.安装Kiali仪表盘
- $ kubectl apply -f samples/addons$ kubectl rollout status deployment/kiali -n istio-systemdeployment "kiali" successfully rolled out
启动仪表盘
- $ istioctl dashboard kialihttp://localhost:20001/kiali
备注：当访问http://127.0.0.1/productpage时可以在仪表盘中观察到流量的流向和服务之间的关系。
