245 lines
7.2 KiB
Markdown
245 lines
7.2 KiB
Markdown
# 安装istio
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本文根据官网的文档整理而成，步骤包括安装`istio 0.1.5`并创建一个bookinfo的微服务来测试istio的功能。
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文中使用的yaml文件可以在[kubernetes-handbook](https://github.com/rootsongjc/kubernetes-handbook)的`manifests/istio`目录中找到，所有的镜像都换成了我的私有镜像仓库地址，请根据官网的镜像自行修改。
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## 安装环境
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CentOS 7.3.1611
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Docker 1.12.6
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Kubernetes 1.6.0
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## 安装
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**1.下载安装包**
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下载地址：https://github.com/istio/istio/releases
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下载Linux版本的当前最新版安装包
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```Shell
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wget https://github.com/istio/istio/releases/download/0.1.5/istio-0.1.5-linux.tar.gz
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```
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**2.解压**
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解压后，得到的目录结构如下：
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```
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.
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├── bin
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│ └── istioctl
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├── install
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│ └── kubernetes
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│ ├── addons
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│ │ ├── grafana.yaml
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│ │ ├── prometheus.yaml
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│ │ ├── servicegraph.yaml
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│ │ └── zipkin.yaml
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│ ├── istio-auth.yaml
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│ ├── istio-rbac-alpha.yaml
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│ ├── istio-rbac-beta.yaml
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│ ├── istio.yaml
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│ ├── README.md
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│ └── templates
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│ ├── istio-auth
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│ │ ├── istio-auth-with-cluster-ca.yaml
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│ │ ├── istio-cluster-ca.yaml
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│ │ ├── istio-egress-auth.yaml
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│ │ ├── istio-ingress-auth.yaml
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│ │ └── istio-namespace-ca.yaml
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│ ├── istio-egress.yaml
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│ ├── istio-ingress.yaml
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│ ├── istio-manager.yaml
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│ └── istio-mixer.yaml
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├── istio.VERSION
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├── LICENSE
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└── samples
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├── apps
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│ ├── bookinfo
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│ │ ├── bookinfo.yaml
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│ │ ├── cleanup.sh
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│ │ ├── destination-ratings-test-delay.yaml
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│ │ ├── loadbalancing-policy-reviews.yaml
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│ │ ├── mixer-rule-additional-telemetry.yaml
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│ │ ├── mixer-rule-empty-rule.yaml
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│ │ ├── mixer-rule-ratings-denial.yaml
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│ │ ├── mixer-rule-ratings-ratelimit.yaml
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│ │ ├── README.md
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│ │ ├── route-rule-all-v1.yaml
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│ │ ├── route-rule-delay.yaml
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│ │ ├── route-rule-reviews-50-v3.yaml
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│ │ ├── route-rule-reviews-test-v2.yaml
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│ │ ├── route-rule-reviews-v2-v3.yaml
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│ │ └── route-rule-reviews-v3.yaml
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│ ├── httpbin
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│ │ ├── httpbin.yaml
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│ │ └── README.md
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│ └── sleep
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│ ├── README.md
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│ └── sleep.yaml
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└── README.md
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11 directories, 41 files
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```
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从文件里表中可以看到，安装包中包括了kubernetes的yaml文件，示例应用和安装模板。
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**3.安装istioctl**
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将`./bin/istioctl`拷贝到你的`$PATH`目录下。
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**4.检查RBAC**
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因为我们安装的kuberentes版本是1.6.0默认支持RBAC，这一步可以跳过。如果你使用的其他版本的kubernetes，请参考[官方文档](https://istio.io/docs/tasks/installing-istio.html)操作。
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执行以下命令，正确的输出是这样的：
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```bash
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$ kubectl api-versions | grep rbac
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rbac.authorization.k8s.io/v1alpha1
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rbac.authorization.k8s.io/v1beta1
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```
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**5.创建角色绑定**
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```bash
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$ kubectl create -f install/kubernetes/istio-rbac-beta.yaml
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clusterrole "istio-manager" created
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clusterrole "istio-ca" created
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clusterrole "istio-sidecar" created
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clusterrolebinding "istio-manager-admin-role-binding" created
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clusterrolebinding "istio-ca-role-binding" created
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clusterrolebinding "istio-ingress-admin-role-binding" created
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clusterrolebinding "istio-sidecar-role-binding" created
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```
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注意：官网的安装包中的该文件中存在RoleBinding错误，应该是集群级别的`clusterrolebinding`，而release里的代码只是普通的`rolebinding`，查看该Issue [Istio manager cannot list of create k8s TPR when RBAC enabled #327](https://github.com/istio/istio/issues/327)。
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**6.安装istio核心组件**
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用到的镜像有：
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```
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docker.io/istio/mixer:0.1.5
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docker.io/istio/manager:0.1.5
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docker.io/istio/proxy_debug:0.1.5
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```
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我们暂时不开启[Istio Auth](https://istio.io/docs/concepts/network-and-auth/auth.html)。
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> 本文中用到的所有yaml文件中的`type: LoadBalancer`去掉，使用默认的ClusterIP，然后配置Traefik ingress，就可以在集群外部访问。请参考[安装Traefik ingress](practice/traefik-ingress-installation.md)。
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```bash
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kubectl apply -f install/kubernetes/istio.yaml
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```
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**7.安装监控插件**
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用到的镜像有：
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```
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docker.io/istio/grafana:0.1.5
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quay.io/coreos/prometheus:v1.1.1
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gcr.io/istio-testing/servicegraph:latest
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docker.io/openzipkin/zipkin:latest
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```
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为了方便下载，其中两个镜像我备份到了时速云：
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```
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index.tenxcloud.com/jimmy/prometheus:v1.1.1
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index.tenxcloud.com/jimmy/servicegraph:latest
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```
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安装插件
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```bash
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kubectl apply -f install/kubernetes/addons/prometheus.yaml
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kubectl apply -f install/kubernetes/addons/grafana.yaml
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kubectl apply -f install/kubernetes/addons/servicegraph.yaml
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kubectl apply -f install/kubernetes/addons/zipkin.yaml
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```
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在traefik ingress中增加增加以上几个服务的配置。
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```Yaml
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- host: grafana.istio.io
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http:
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paths:
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- path: /
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backend:
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serviceName: grafana
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servicePort: 3000
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- host: servicegraph.istio.io
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http:
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paths:
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- path: /
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backend:
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serviceName: servicegraph
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servicePort: 8088
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- host: prometheus.istio.io
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http:
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paths:
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- path: /
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backend:
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serviceName: prometheus
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servicePort: 9090
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- host: zipkin.istio.io
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http:
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paths:
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- path: /
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backend:
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serviceName: zipkin
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servicePort: 9411
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```
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Grafana页面
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Prometheus页面
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Zipkin页面
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## 测试
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我们使用Istio提供的测试应用[bookinfo](https://istio.io/docs/samples/bookinfo.html)微服务来进行测试。
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该微服务用到的镜像有：
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```
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istio/examples-bookinfo-details-v1
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istio/examples-bookinfo-ratings-v1
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istio/examples-bookinfo-reviews-v1
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istio/examples-bookinfo-reviews-v2
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istio/examples-bookinfo-reviews-v3
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istio/examples-bookinfo-productpage-v1
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```
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**部署应用**
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```
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kubectl create -f <(istioctl kube-inject -f samples/apps/bookinfo/bookinfo.yaml)
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```
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`Istio kube-inject`命令会在`bookinfo.yaml`文件中增加Envoy sidecar信息。参考：https://istio.io/docs/reference/commands/istioctl.html#istioctl-kube-inject
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## 问题
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在bookinfo部署后没有在Grafana、Prometheus、ServiceGraph和Zipkin中看到结果。
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## 参考
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[Installing Istio](https://istio.io/docs/tasks/installing-istio.html)
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[BookInfo sample](https://istio.io/docs/samples/bookinfo.html) |