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-- step : deploy on ali ecs Signed-off-by: zcho <849085386@qq.com>
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---
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标题: "KubeSphere 在 阿里云ECS 高可用实例"
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关键字: "Kubesphere，安装，高可用性，高可用性，负载均衡器"
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描述: "本教程用于安装高可用性集群"
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---
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# 在阿里云ECS部署高可用的 KubeSphere
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快速入门 尝试建议All-In-One入手
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但对于生产环境，我们需要考虑集群的高可用性。
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kubernate服务需要做到高可用,需要保证kube-apiserver的ha,所以推荐下列两种方式
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1. 阿里云SLB
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2. keepalived + haproxy [keepalived + haproxy](https://kubesphere.com.cn/forum/d/1566-kubernetes-keepalived-haproxy)对kube-apiserver进行负载均衡，实现高可用kubernetes集群。
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## 前提条件
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- 请遵循该[指南](https://github.com/kubesphere/kubekey)，确保您已经知道如何将KubeSphere与多节点集群一起安装。有关用于安装的config yaml文件的详细信息，请参阅多节点安装。本教程重点介绍如何配置负载均衡器。
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- 考虑到数据的持久性，对于生产环境，我们不建议您使用存储OpenEBS,建议nfs,gfs等存储(需要提前安装)。文章为了进行开发和测试，集成的OpenEBS直接将LocalPV设置为存储服务。
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## 部署架构
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## 创建主机
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本示例创建 SLB + 6 台 **CentOS Linux release 7.6.1810 (Core)** 的虚拟机，每台配置为 2Core16GB50G
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| 主机IP | 主机名称 | 角色 |
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| --- | --- | --- |
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|39.104.82.170|Eip|slb|
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|172.24.107.72|master1|master1, etcd|
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|172.24.107.73|master2|master2, etcd|
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|172.24.107.74|master3|master3, etcd|
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|172.24.107.75|node1|node|
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|172.24.107.76|node2|node|
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|172.24.107.77|node3|node|
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机器有限,所以把etcd放入master,在生产环境建议单独部署etcd,提高稳定性
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## 部署keepalived+haproxy
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### 1. 创建SLB
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创建SLB实例
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### 2. 配置SLB
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后面的config.yaml 需要配置slb分配的地址
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```yaml
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controlPlaneEndpoint:
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domain: lb.kubesphere.local
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address: "39.104.82.170"
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port: "6443"
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```
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### 3. 配置SLB 主机实例
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添加需要负载的3台master主机 6443端口(api-server)
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- <font color=red>现在的健康检查暂时是失败的,因为还没部署master的服务,所以6443端口telnet不通的.
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</font>
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- 然后提交审核即可
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## 4. 获取安装程序可执行文件
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```bash
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#下载installer 至随意一台机器
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curl -O -k https://kubernetes.pek3b.qingstor.com/tools/kubekey/kk
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chmod +x kk
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```
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## 创建多节点群集
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您可以使用高级安装来控制自定义参数或创建多节点群集。具体来说，通过指定配置文件来创建集群。
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### 5. 使用kubekey部署k8s集群 带kubesphere
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```bash
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# 在当前位置创建配置文件config-sample.yaml|包含kubesphere的配置文件
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./kk create config --with-kubesphere v3.0.0 -f config-sample.yaml
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---
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# 同时安装存储插件 (支持：localVolume、nfsClient、rbd、glusterfs)。您可以指定多个插件并用逗号分隔。请注意，您添加的第一个将是默认存储类。
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./kk create config --with-storage localVolume --with-kubesphere v3.0.0 -f config-sample.yaml
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```
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#### 6. 多集群配置调整
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```yaml
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#vi ~/config-sample.yaml
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apiVersion: kubekey.kubesphere.io/v1alpha1
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kind: Cluster
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metadata:
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name: config-sample
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spec:
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hosts:
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- {name: master1, address: 172.24.107.72, internalAddress: 172.24.107.72, user: root, password: QWEqwe123}
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- {name: master2, address: 172.24.107.73, internalAddress: 172.24.107.73, user: root, password: QWEqwe123}
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- {name: master3, address: 172.24.107.74, internalAddress: 172.24.107.74, user: root, password: QWEqwe123}
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- {name: node1, address: 172.24.107.75, internalAddress: 172.24.107.75, user: root, password: QWEqwe123}
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- {name: node2, address: 172.24.107.76, internalAddress: 172.24.107.76, user: root, password: QWEqwe123}
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- {name: node3, address: 172.24.107.77, internalAddress: 172.24.107.77, user: root, password: QWEqwe123}
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roleGroups:
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etcd:
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- master1
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- master2
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- master3
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master:
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- master1
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- master2
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- master3
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worker:
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- node1
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- node2
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- node3
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controlPlaneEndpoint:
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domain: lb.kubesphere.local
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address: "39.104.82.170"
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port: "6443"
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kubernetes:
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version: v1.17.9
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imageRepo: kubesphere
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clusterName: cluster.local
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network:
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plugin: calico
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kubePodsCIDR: 10.233.64.0/18
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kubeServiceCIDR: 10.233.0.0/18
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registry:
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registryMirrors: ["https://*.mirror.aliyuncs.com"] # # input your registryMirrors
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insecureRegistries: []
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storage:
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defaultStorageClass: localVolume
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localVolume:
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storageClassName: local
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---
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apiVersion: installer.kubesphere.io/v1alpha1
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kind: ClusterConfiguration
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metadata:
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name: ks-installer
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namespace: kubesphere-system
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labels:
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version: v3.0.0
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spec:
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local_registry: ""
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persistence:
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storageClass: ""
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authentication:
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jwtSecret: ""
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etcd:
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monitoring: true
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endpointIps: 172.24.107.72,172.24.107.73,172.24.107.74
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port: 2379
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tlsEnable: true
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common:
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es:
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elasticsearchDataVolumeSize: 20Gi
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elasticsearchMasterVolumeSize: 4Gi
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elkPrefix: logstash
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logMaxAge: 7
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mysqlVolumeSize: 20Gi
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minioVolumeSize: 20Gi
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etcdVolumeSize: 20Gi
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openldapVolumeSize: 2Gi
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redisVolumSize: 2Gi
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console:
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enableMultiLogin: false # enable/disable multi login
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port: 30880
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alerting:
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enabled: false
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auditing:
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enabled: false
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devops:
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enabled: false
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jenkinsMemoryLim: 2Gi
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jenkinsMemoryReq: 1500Mi
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jenkinsVolumeSize: 8Gi
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jenkinsJavaOpts_Xms: 512m
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jenkinsJavaOpts_Xmx: 512m
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jenkinsJavaOpts_MaxRAM: 2g
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events:
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enabled: false
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ruler:
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enabled: true
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replicas: 2
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logging:
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enabled: false
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logsidecarReplicas: 2
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metrics_server:
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enabled: true
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monitoring:
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prometheusMemoryRequest: 400Mi
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prometheusVolumeSize: 20Gi
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multicluster:
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clusterRole: none # host | member | none
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networkpolicy:
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enabled: false
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notification:
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enabled: false
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openpitrix:
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enabled: false
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servicemesh:
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enabled: false
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```
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#### 7. 执行命令创建集群
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```bash
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指定配置文件创建集群
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./kk create cluster -f config-sample.yaml
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查看kubesphere安装日志 -- 直到出现下面的输出结果
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kubectl logs -n kubesphere-system $(kubectl get pod -n kubesphere-system -l app=ks-install -o jsonpath='{.items[0].metadata.name}') -f
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```
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```
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#### 输出结果
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```bash
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**************************************************
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task monitoring status is running
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task multicluster status is successful
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total: 2 completed:1
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**************************************************
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task monitoring status is successful
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task multicluster status is successful
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total: 2 completed:2
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**************************************************
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#####################################################
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### Welcome to KubeSphere! ###
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#####################################################
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Console: http://172.24.107.72:30880
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Account: admin
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Password: P@88w0rd
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NOTES：
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1. After logging into the console, please check the
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monitoring status of service components in
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the "Cluster Management". If any service is not
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ready, please wait patiently until all components
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are ready.
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2. Please modify the default password after login.
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#####################################################
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https://kubesphere.io 2020-08-24 23:30:06
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#####################################################
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```
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## 下图为部署后的使用情况
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```bash
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#删除cluster
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./kk delete cluster -f config-sample.yaml --debug --skip-pull-images
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#小提示，如果安装过程中碰到`Failed to add worker to cluster: Failed to exec command...`
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kubeadm reset
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```
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