InfoScale support for VMware vSphere and vSAN datastore with SCSI-3 enabled VMDK disks—VMware vSphere 7.0 and vSAN 6.7 U3/7.0
Description
VMware announced the General Availability of vSphere 7 on March 10th, 2020 and Veritas InfoScale is committed to provide support for the VMware major and update releases.
To support VMware vSphere 7 with Veritas InfoScale 7.4.2, several scenarios were tested along with the traditionally supported use-cases. The following table describes the qualification scenarios and the test results for these scenarios.
Use-cases supported with InfoScale 7.4.2
| Qualification scenario | Qualification test results (success) |
|---|---|
| Install and configure InfoScale Guest cluster | Successfully installed and configured InfoScale Enterprise using Common Product Installer (CPI) |
| Export VMDKs with MWF/RDM-P to all 3 Guests in sharing mode | Successfully configured VMDKs on VMFS datastore or RDM-P mapping files stored on VMFS datastore |
| Configure disk based NON SCSI3-PR server-based fencing using VMDKs with MWF or Disk-based SCSI-3 fencing using RDM-P disks | Successfully configured fencing using Common Product Installer (CPI) |
| Configure VCS VMwareDisk agent to provide HA for VMDK or RDM-P disks assigned to a single VM in the InfoScale cluster | Successfully configured VCS VMwareDisk agent using VCS Application Configuration Wizard along with Application agent, for example, Oracle |
| Install and configure of Oracle database on CFS and VxFS mounts | Successfully installed and configured application-based HA for the Oracle database |
| Configure VCS agent for Oracle with the fast failover option | Successfully configured VCS agent for Oracle with fast failover option to reduce the time required for failover and failback |
| Fail over and fail back of Oracle service group using the VCS agent | Successfully tested failover and failback of VCS agent for Oracle service while database workload is running |
| Simulate network split-brain | Successfully simulated the VCS cluster failure scenario by disabling LLT (cluster interconnects) and checking whether the database service fails over to an available node |
| Virtual machine live migration (host vMotion operations) | Successfully performed live migration of a virtual machine that is a part of an InfoScale cluster and verified that no failure occurred in the cluster |
| ESXi hypervisor node failure | Successfully configured VMware HA and tested the hypervisor node failure scenario; verified that the hosted virtual machine comes online on another hypervisor node, the VMDK disks are available and the virtual machine joins the InfoScale cluster |
VMware also added support for SCSI-3 Persistent Reservations (SCSI-3 PR) on VMFS datastore. For details, refer to the article at: https://core.vmware.com/resource/vsphere-7-rdm-shared-vmdk-migration/#sec1-sub2.
Additionally, SCSI-3 support was introduced in vSAN datastore with vSAN 6.7 U3. For details, refer to the article at: https://blogs.vmware.com/virtualblocks/2019/08/23/vsan67-u3-wsfc-shared-disksupport/.
After the VMware announcement, Veritas carried out the qualification process for these capabilities with InfoScale. It was observed that the key SCSI3-PGR functionality used by InfoScale is not supported by VMware in the current versions. Hence, currently, InfoScale does not support the use of the SCSI3-PGR-based functionality for VMDKs.
The following table lists the scenarios where the roadblocks were observed.
Use-cases not supported with InfoScale 7.4.2
| Qualification scenario | Qualification test results (roadblocks) |
|---|---|
Configure SCSI-3 disk-based fencing using VMDK disks on VMFS 6.0 datastores on vSphere 7.0 (Clustered VMDK support) |
Using the vxfentsthdw utility, verified that a VMDK disk is supported for a fencing configuration. The following errors was encountered:
The OS native SCSI-3 commands also failed on such VMDK disks with the following error:
This issue is being tracked with VMware through the DCPN Engineering request 00068904. |
| Configure SCSI-3 disk-based fencing using VMDK disks on vSAN 6.7 U3 and later datastores | Using the vxfentsthdw utility, verified that a VMDK disk is supported for a fencing configuration. The following error was encountered:
The OS native SCSI-3 commands also failed on such VMDK disks with the following error:
This issue is being tracked with VMware through the DCPN Engineering request 00068904. |
Veritas is working with VMware to get a resolution for these defects and to announce the relevant support after another qualification cycle.
Reference: Veritas InfoScale 7.4.2 Virtualization Guide - Linux on ESXi
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