VsphereVolume ● PersistentVolumeClaim ○ 申请存储资源 Kubernetes 计算资源 Pod ● Pod ○ 计算任务 → 容器 → Pod ○ 资源分配：CPU，内存，磁盘 ○ 资源调度：Pod → Node ● Pod管理 ○ 无状态计算资源组：Deployment ○ 有状态计算资源组：StatefulSet ● Pod持久存储 ○ 通过PVC申请PV存储资源

storage-vc-template templates: volumeClaimTemplates: - name: storage-vc-template persistentVolumeClaim: spec: accessModes: - ReadWriteOnce resources:

storage-vc-template templates: volumeClaimTemplates: - name: storage-vc-template persistentVolumeClaim: spec: accessModes: - ReadWriteOnce resources:

状态保存 带来的新挑战 服务调度 状态存储 集群管理 成员管理 扩缩容 故障迁移 高可用 CoreOS 提出了 operator Deployment StatefulSet PV/PVC StorageClass ？？ 站在 Kubernetes 的肩膀上 An Operator is an application-specific controller that extends 0-449.el7 解决 https://bugzilla.redhat.com/show_bug.cgi?id=1319256 • 现象：PVC 在第一次绑定的时候特别慢 原因：pod 使用未绑定 PVC 时，不会加入使用的 volume，又不 watch PVC，导致只有 超时时才重新处理 方案：k8s v1.10.7 解决 https://github.com/kubernetes/kubernetes/issues/64549

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delete vitess 30 You will need to delete the persistent volume claims too kubectl delete pvc $(kubectl get pvc | grep vtdataroot -zone1 | awk '{print $1}') Congratulations on completing this exercise

delete $release You will need to delete the persistent volume claims too kubectl delete pvc $(kubectl get pvc | grep vtdataroot -zone1 | awk '{print $1}') Congratulations on completing this exercise

ZooKeeper nodes 1 governance.zooke eper. persistence.enabled Enable persistence on ZooKeeper using PVC(s) ˋ false` governance.zookeeper. persis- tence.storageClass Persistent Volume storage class "" lumes/ ## @param governance.zookeeper.persistence.enabled Enable persistence on ZooKeeper using PVC(s) ## @param governance.zookeeper.persistence.storageClass Persistent Volume storage class ## @param

ZooKeeper nodes 1 governance.zooke eper. persistence.enabled Enable persistence on ZooKeeper using PVC(s) ˋ false` governance.zookeeper. persis- tence.storageClass Persistent Volume storage class "" lumes/ ## @param governance.zookeeper.persistence.enabled Enable persistence on ZooKeeper using PVC(s) ## @param governance.zookeeper.persistence.storageClass Persistent Volume storage class ## @param

ZooKeeper nodes 1 governance.zookee per. persistence.enabled Enable persistence on ZooKeeper using PVC(s) false governance.zookeeper.p ersis- tence.storageClass Persistent Volume storage class "" governance lumes/ ## @param governance.zookeeper.persistence.enabled Enable persistence on ZooKeeper using PVC(s) ## @param governance.zookeeper.persistence.storageClass Persistent Volume storage class ## @param