StarWind Virtual SAN: Configuration Guide for Red Hat Virtualization (RHV) [KVM], VSAN Deployed as a Controller VM (CVM) using PowerShell CLI

Annotation

Relevant Products

StarWind Virtual SAN (VSAN)

Purpose

This document serves as a comprehensive configuration guide for deploying StarWind Virtual SAN (VSAN) in a Red Hat Virtualization environment. The configuration involves deploying VSAN as a Controller Virtual Machine (CVM) and creating HA devices using PowerShell CLI. It also provides step-by-step instructions for the deployment and configuration of the StarWind Virtual SAN CVM.

Audience

This document is intended for IT professionals, system administrators, and virtualization specialists.

Expected Result

The expected result is the successful deployment and configuration of StarWind Virtual SAN as a Controller Virtual Machine (CVM) in the Red Hat Virtualization [KVM] environment.

Introduction to StarWind Virtual SAN CVM

StarWind Virtual SAN Controller Virtual Machine (CVM) comes as a prepackaged Linux Virtual Machine (VM) to be deployed on any industry-standard hypervisor. It creates a VM-centric and high-performing storage pool for a VM cluster.
This guide describes the deployment and configuration process of the StarWind Virtual SAN CVM.

StarWind VSAN System Requirements

Prior to installing StarWind Virtual SAN, please make sure that the system meets the requirements, which are available via the following link:
https://www.starwindsoftware.com/system-requirements

Recommended RAID settings for HDD and SSD disks:
https://knowledgebase.starwindsoftware.com/guidance/recommended-raid-settings-for-hdd-and-ssd-disks/

Please read StarWind Virtual SAN Best Practices document for additional information:
https://www.starwindsoftware.com/resource-library/starwind-virtual-san-best-practices

Pre-configuring the KVM Hosts

The diagram below illustrates the network and storage configuration of the solution:

1. Make sure that a oVirt engine is installed on a separate host.

2. Deploy oVirt on each server and add them to oVirt engine.

3. Define at least 2x network interfaces on each node that will be used for the Synchronization and iSCSI/StarWind heartbeat traffic. Do not use ISCSI/Heartbeat and Synchronization channels

over the same physical link. Synchronization and iSCSI/Heartbeat links can be connected either via redundant switches or directly between the nodes (see diagram above).

4. Separate Logical Networks should be created for iSCSI and Synchronization traffic based on the selected before iSCSI and Synchronization interfaces. Using oVirt engine Netowrking page create two Logical Networks: one for the iSCSI/StarWind Heartbeat channel (iSCSI) and another one for the Synchronization channel (Sync).

5. Add physical NIC to Logical network on each host and configure static IP addresses. In this document, the 172.16.10.x subnet is used for iSCSI/StarWind heartbeat traffic, while 172.16.20.x subnet is used for the Synchronization traffic.

NOTE: In case NIC supports SR-IOV, enable it for the best performance. Contact support for additional details.

Enabling Multipath Support

8. Connect to server via ssh.

9. Create file /etc/multipath/conf.d/starwind.conf with the following content:

10. Restart multipathd service.

11. Repeat the same procedure on the other server.

Creating NFS share

1. Make sure that each host has free storage to create NFS share.

2. Enable nfs server and rpcbind services.

3. Create directory for NFS share.

4. Change rights and owner of the share to KVM

5. Add NFS share to /etc/exports file.

6. Restart NFS server service.

7. Check that share has been exported.

8. Add firewall rules for NFS.

Deploying Starwind Virtual SAN CVM

1. Download StarWind VSAN CVM KVM: VSAN by StarWind: Overview 

2. Extract the VM StarWindCVM.ova file from the downloaded archive.

3. Upload StarWindCVM.ova file to the oVirt Host via any SFTP client.

4. Change owner of the StarWindCVM.ova.

5. Login to oVirt and open Compute -> Virtual Machines page. Choose Import.

6. Specify path to .ova file and choose VM to import. Click Next.

7. Verify VM settings and configure networks. Click OK.

8. Repeat all the steps from this section on other oVirt hosts.

Configuring StarWind Virtual SAN VM settings

1. Open the VM console and check the IP address received via DHCP (or which was assigned manually).

Another alternative is to log into the VM via console and assign static IP using nmcli if there is no DHCP.

2. Now, open the web browser and enter the IP address of the VM. Log into the VM using the following default credentials:  

• Username: user  
• Password: rds123RDS  
• NOTE: Make sure to check the “Reuse my password for privileged tasks” box.

3. After a successful login, click Accounts on the left sidebar. 

4. Select a user and click Set Password.  

5. On the left sidebar, click Networking. 

Here, the Management IP address of the StarWind Virtual SAN Virtual Machine can be configured, as well as IP addresses for iSCSI and Synchronization networks. In case the Network interface is inactive, click on the interface, turn it on, and set it to Connect automatically.

6. Click on Automatic (DHCP) to set the IP address (DNS and gateway – for Management).

7. The result should look like in the picture below:

NOTE: It is recommended to set MTU to 9000 on interfaces dedicated for iSCSI and Synchronization traffic. Change Automatic to 9000, if required. 

8. Alternatively, log into the VM via the oVirt console and assign a static IP address by editing the configuration file of the interface located by the following path: /etc/sysconfig/network-scripts  

9.Open the file corresponding to the Management interface using a text editor, for example: sudo nano /etc/sysconfig/network-scripts/ifcfg-eth0  

10.

1. Edit the file:  

• Change the line BOOTPROTO=dhcp to: BOOTPROTO=static  
• Add the IP settings needed to the file:  
• IPADDR=192.168.12.10  
• NETMASK=255.255.255.0  
• GATEWAY=192.168.12.1  
• DNS1=192.168.1.1  

11. Restart the interface using the following cmdlet: sudo ifdown eth0, sudo ifup eth0, or restart the VM. 

12. Change the Host Name from the System tab by clicking on it:  

13. Change System time and NTP settings if required:

14. Repeat the steps above on each StarWind VSAN VM.  

Configuring StarWind Management Components

1. Install StarWind Management Console on each server or on a separate workstation with Windows OS (Windows 7 or higher, Windows Server 2008 R2 and higher) using the installer available here.
NOTE: StarWind Management Console and PowerShell Management Library components are required.

2. Open StarWind InstallLicense.ps1 script with PowerShell ISE as administrator. It can be found here:
C:\Program Files\StarWind Software\StarWind\StarWindX\Samples\powershell\InstallLicense.ps1
Type the IP address of StarWind Virtual SAN VM and credentials of StarWind Virtual SAN service (defaults login: root, password: starwind).
Add the path to the license key.
3. After the license key is applied, StarWind devices can be created.
NOTE: In order to manage StarWind Virtual SAN service (e.g. create ImageFile devices, VTL devices, etc.), StarWindX PowerShell library can be used. StarWind Management Console can be used to monitor StarWind Virtual SAN Service.

Creating StarWind HA LUNs using PowerShell

1. Open PowerShell ISE as Administrator.

2.  Open StarWindX sample CreateHA_2.ps1 using PowerShell ISE. It can be found here:
C:\Program Files\StarWind Software\StarWind\StarWindX\Samples\

2.  Configure script parameters according to the following example:

Detailed explanation of script parameters:

-addr, -addr2 — partner nodes IP address.
Format: string. Default value: 192.168.0.1, 192.168.0.1
allowed values: localhost, IP-address
-port, -port2 — local and partner node port.
Format: string. Default value: 3261
-user, -user2 — local and partner node user name.
Format: string. Default value: root
-password, -password2 — local and partner node user password.
Format: string. Default value: starwind

#common
-initMethod –
Format: string. Default value: Clear
-size – set size for HA-devcie (MB)
Format: integer. Default value: 12
-sectorSize – set sector size for HA-device
Format: integer. Default value: 512
allowed values: 512, 4096
-failover – set type failover strategy
Format: integer. Default value: 0 (Heartbeat)
allowed values: 0, 1 (Node Majority)
-bmpType – set bitmap type, is set for both partners at once
Format: integer. Default value: 1 (RAM)
allowed values: 1, 2 (DISK)
-bmpStrategy – set journal strategy, is set for both partners at once
Format: integer. Default value: 0
allowed values: 0, 1 – Best Performance (Failure), 2 – Fast Recovery (Continuous)

#primary node
-imagePath – set path to store the device file
Format: string. Default value: My computer\C\starwind”. For Linux the following format should be used: “VSA Storage\mnt\mount_point”
-imageName – set name device
Format: string. Default value: masterImg21
-createImage – set create image file
Format: boolean. Default value: true
-targetAlias – set alias for target
Format: string. Default value: targetha21
-poolName – set storage pool
Format: string. Default value: pool1
-aluaOptimized – set Alua Optimized
Format: boolean. Default value: true
-cacheMode – set type L1 cache (optional parameter)
Format: string. Default value: wb
allowed values: none, wb, wt
-cacheSize – set size for L1 cache in MB (optional parameter)
Format: integer. Default value: 128
allowed values: 1 and more
-syncInterface – set sync channel IP-address from partner node
Format: string. Default value: “#p2={0}:3260”
-hbInterface – set heartbeat channel IP-address from partner node
Format: string. Default value: “”
-createTarget – set creating target
Format: string. Default value: true
Even if you do not specify the parameter -createTarget, the target will be created automatically.
If the parameter is set as -createTarget $false, then an attempt will be made to create the device with existing targets, the names of which are specified in the -targetAlias (targets must already be created)
-bmpFolderPath – set path to save bitmap file
Format: string.

#secondary node
-imagePath2 – set path to store the device file
Format: string. Default value: “My computer\C\starwind”. For Linux the following format should be used: “VSA Storage\mnt\mount_point”
-imageName2 – set name device
Format: string. Default value: masterImg21
-createImage2 – set create image file
Format: boolean. Default value: true
-targetAlias2 – set alias for targetFormat: string.
Default value: targetha22
-poolName2 – set storage pool
Format: string. Default value: pool1
-aluaOptimized2 – set Alua Optimized
Format: boolean. Default value: true
-cacheMode2 – set type L1 cache (optional parameter)
Format: string. Default value: wb
allowed values: wb, wt
-cacheSize2 – set size for L1 cache in MB (optional parameter)
Format: integer. Default value: 128
allowed values: 1 and more
-syncInterface2 – set sync channel IP-address from partner node
Format: string. Default value: “#p1={0}:3260”
-hbInterface2 – set heartbeat channel IP-address from partner node
Format: string. Default value: “”
-createTarget2 – set creating target
Format: string. Default value: true
Even if you do not specify the parameter -createTarget, the target will be created automatically.If the parameter is set as -createTarget $false, then an attempt will be made to create the device with existing targets, the names of which are specified in the -targetAlias (targets must already be created)
-bmpFolderPath2 – set path to save bitmap file
Format: string.

Selecting the Failover Strategy

StarWind provides 2 options for configuring a failover strategy:

Heartbeat

The Heartbeat failover strategy allows avoiding the “split-brain” scenario when the HA cluster nodes are unable to synchronize but continue to accept write commands from the initiators independently. It can occur when all synchronization and heartbeat channels disconnect simultaneously, and the partner nodes do not respond to the node’s requests. As a result, StarWind service assumes the partner nodes to be offline and continues operations on a single-node mode using data written to it.
If at least one heartbeat link is online, StarWind services can communicate with each other via this link. The device with the lowest priority will be marked as not synchronized and get subsequently blocked for the further read and write operations until the synchronization channel resumption. At the same time, the partner device on the synchronized node flushes data from the cache to the disk to preserve data integrity in case the node goes down unexpectedly. It is recommended to assign more independent heartbeat channels during the replica creation to improve system stability and avoid the “split-brain” issue.
With the heartbeat failover strategy, the storage cluster will continue working with only one StarWind node available.

Node Majority

The Node Majority failover strategy ensures the synchronization connection without any additional heartbeat links. The failure-handling process occurs when the node has detected the absence of the connection with the partner.
The main requirement for keeping the node operational is an active connection with more than half of the HA device’s nodes. Calculation of the available partners is based on their “votes”.
In case of a two-node HA storage, all nodes will be disconnected if there is a problem on the node itself, or in communication between them. Therefore, the Node Majority failover strategy requires the addition of the third Witness node or file share (SMB) which participates in the nodes count for the majority, but neither contains data on it nor is involved in processing clients’ requests. In case an HA device is replicated between 3 nodes, no Witness node is required.
With Node Majority failover strategy, failure of only one node can be tolerated. If two nodes fail, the third node will also become unavailable to clients’ requests.
Please select the required option:

Provisioning StarWind HA Storage to Hosts

1. Login to Engine and open Storage -> Domain. Click New Domain.

2. Choose Storage Type – iSCSI, Host and Name of Storage Domain. Discover targets via iSCSI links, which were previously configured. Click Login All.
3. Add LUN from each iSCSI target. Click OK.

4. Storage Domain will be added to the list of Domain and can be used as a storage for VMs.

5. Login to each host and verify that multipathing policy has been applied using the following command.

Conclusion

By following the outlined steps and recommendations, IT professionals can get highly-avaialble StarWind storage for their Red Hat-based virtualization environment. StarWind Virtual SAN CVM provides a reliable solution for creating a high-performing storage pool, contributing to the efficiency and effectiveness of Red Hat Virtualization deployments.