Tuesday, December 11, 2018

Datrium + Kubernetes with VMware vSphere - VMware Certifications


You may configure any Kubernetes distribution to access VMware vSphere VMDK Volumes. This includes using VMware vSphere VMDK Volumes as persistent volumes for application data with Datrium. The vSphere Cloud Provider allows using vSphere managed storage for Volumes, Persistent volumes, Storage classes, and provisioning volumes. Datrium presents a single-namespace (or multiple) datastore to vSphere that is then abstracted by Kubernetes.

Dynamic Volume Provisioning


Dynamic volume provisioning allows storage volumes to be created on-demand. Without dynamic provisioning, cluster administrators have to manually make calls to their cloud or storage provider to create new storage volumes, and then create PersistentVolume objects to represent them in Kubernetes. The dynamic provisioning feature eliminates the need for cluster administrators to pre-provision storage. Instead, it automatically provisions storage when it is requested by users.

To enable dynamic provisioning, a Kubernetes cluster administrator needs to pre-create one or more StorageClass objects for users. StorageClass objects define which provisioner should be used and what parameters should be passed to that provisioner when dynamic provisioning is invoked.

Backing Up Persistent Volumes


Kubernetes provisions new volumes as persistent independent disks to freely attach and detach the volume on any node in the cluster, and for Datrium DVX each persistent volume is an independent VMDK.

As a consequence, it is not possible to backup volumes that use VMware snapshots, and VMware recommends stopping the application utilizing the PV, cloning the PV, restarting the application.

Datrium can uniquely address Kubernetes persistent volumes backup and replication with native non-disruptive snapshots that have zero impact on volumes and applications usability or performance.

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