> For the complete documentation index, see [llms.txt](https://pshizhsysu.gitbook.io/kubernetes/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://pshizhsysu.gitbook.io/kubernetes/ji-qun-lian-bang/an-zhuang-federation-v1.md). # 安装federation-v1 ## 准备三个集群 准备三个kubernetes集群，它们的用处分别为 * `f-cluster`：用来部署kubefed的组件, 192.168.1.103 * `a-cluster`：联邦下的一个集群 192.168.1.101 * `b-cluster`：联邦下的一个集群 192.168.1.102 ## 安装kubectl 安装好kubectl并设置好kubeconfig，使用其能连上三个kubernetes集群，kubeconfig文件的内容应该如下： ``` apiVersion: v1 kind: Config preferences: {} clusters: - name: f-cluster cluster: server: https://192.168.1.103:6443 certificate-authority-data: xxxxxxxxxxx - name: a-cluster cluster: server: https://192.168.1.101:6443 certificate-authority-data: xxxxxxxxxxx - name: b-cluster cluster: server: https://192.168.1.102:6443 certificate-authority-data: xxxxxxxxxxx users: - name: f-admin user: client-key-data: xxxxxxxxxxx client-certificate-data: xxxxxxxxxxxxx - name: a-admin user: client-key-data: xxxxxxxxxxx client-certificate-data: xxxxxxxxxxxxx - name: b-admin user: client-key-data: xxxxxxxxxxx client-certificate-data: xxxxxxxxxxxxx contexts: - name: f-context context: cluster: f-cluster user: f-admin - name: a-context context: cluster: a-cluster user: a-admin - name: b-context context: cluster: b-cluster user: b-admin current-context: f-context ``` 执行命令`kubectl config get-clusters`查看集群信息 ``` $ kubectl config getc-clusters NAME b-cluster f-cluster a-cluster ``` 执行`kubectl config get-contexts`查看上下文信息 ``` $ kubectl config get-contexts CURRENT NAME CLUSTER AUTHINFO NAMESPACE a-context a-cluster a-admin b-context b-cluster b-admin * f-context f-cluster f-admin ``` ## 部署coredns-provider ``` ### deperecated coredns将数据存储在etcd中，所以我们先部署etcd集群，这里使用helm来部署： $ helm install --namespace federation --name etcd-operator stable/etcd-operator $ helm upgrade --namespace federation --set cluster.enabled=true etcd-operator stable/etcd-operator 部署成功后，便可以在集群中通过`http://etcd-cluster.federation:2379`来访问该etcd服务 ``` coredns将数据存储在etcd中，所以我们先部署etcd集群，这里我们额外先部署好，假设coredns的etcd的URL为`http://192.168.1.103:3379`： 接下来，我们也用helm来部署coredns服务： ``` $ helm install --namespace federation --name coredns -f Values.yaml stable/coredns ``` `Values.yaml`文件的内容如下： ``` isClusterService: false serviceType: "NodePort" plugins: kubernetes: enabled: false etcd: enabled: true zones: - "example.com." endpoint: "http://192.168.1.103:3379" ``` 检查coredns与etcd的pod有正常运行 ## 获取kubefed 从github上下载kubefed的压缩包（`https://github.com/kubernetes-retired/federation/releases`），比如我们下载的是`release_v1.9.0-alpha.3_federation-client-linux-amd64.tar`然后解压 ``` $ tar -xzvf release_v1.9.0-alpha.3_federation-client-linux-amd64.tar $ sudo cp federation/client/bin/kubefed /usr/local/bin $ sudo chmod +x /usr/local/bin/kubefed ``` ## 部署kubefed的control plane control-plane的apiserver需要使用etcd存储数据，我们先提前安装好一个etcd集群供它使用，假设etcd服务的地址为`http://192.168.1.103:4379` 接下来，你们执行以下命令来创建一个名字叫federation的集群联邦 ``` $ kubefed init federation \ --host-cluster-context=f-context \ --dns-provider="coredns" \ --dns-zone-name="example.com." \ --dns-provider-config="coredns-provider.conf" \ --api-server-service-type="NodePort" \ --etcd-servers="http://192.168.1.103:4379" ``` 其中`coredns-provider.conf`的内容如下： ``` [Global] etcd-endpoints = http://192.168.1.103:3379 zones = example.com. ``` ## 添加集群 执行以下命令添加两个集群到联邦中 ``` $ kubefed join a-cluster --cluster-context=a-context --host-cluster-context=f-context $ kubefed join b-cluster --cluster-context=b-context --host-cluster-context=f-context ``` 然后执行以下命令查看联邦中的集群 ``` $ kubectl get cluster ``` ## 发布Deployment 通过联邦apiserver发布一个Deployment ``` apiVersion: v1 kind: Deployment metadata: name: nginx spec: selector: matchLabels: app: nginx template: metadata: labels: app: nginx spec: containers: - name: nginx image: nginx:latest ``` ``` $ kubectl create -f nginx-deployment.ymal ``` 查看a集群中的pod数目 ``` $ kubectl get pod --context=a-context ``` 查看b集群中的pod数目（在b集群上执行） ``` $ kubectl get pod --context=b-context ``` ## 跨集群服务发现 to be continued ## 跨集群负载均衡 to be continued ## FAQ Q: 集群之间的网络怎么打通？ ## Reference * * * --- # Agent Instructions This documentation is published with GitBook. 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