openEBS安装

环境准备

1. OpenEBS要求配置iSCSI客户端，并且在worker nodes上运行iscsid服务

   yum -y install iscsi-initiator-utils   
   systemctl enable --now iscsid
   

2. 节点临时移除 k8smaster 上的 Taint
   • 查看

   kubectl describe node k8smaster | grep Taint 
   

   • 移除

   kubectl taint nodes k8smaster node-role.kubernetes.io/master:NoSchedule-
   

   • 安装完毕需要记住恢复 taint

   kubectl taint nodes k8smaster node-role.kubernetes.io/master=:NoSchedule
   

安装 OpenEBS

1. 创建 OpenEBS 的 namespace

   kubectl create ns openebs
   

2. 添加 helm 资源库

   helm repo add openebs https://openebs.github.io/charts
   helm repo update
   

3. 安装 openebs

   helm install --namespace openebs --name openebs openebs/openebs --version 2.1.0
   

   安装完有提示：

   NAME:   openebs
   LAST DEPLOYED: Sun Sep 20 17:03:06 2020
   NAMESPACE: openebs
   STATUS: DEPLOYED
   ...
   Please note that, OpenEBS uses iSCSI for connecting applications with the
   OpenEBS Volumes and your nodes should have the iSCSI initiator installed.
   
   

4. 设置默认 StorageClass

   kubectl patch storageclass openebs-hostpath -p '{"metadata": {"annotations":{"storageclass.kubernetes.io/is-default-class":"true"}}}'
   
   

5. 建立测试应用验证服务是否传教