Troubleshooting vSAN components using PowerShell (PowerCLI) involves identifying and resolving issues related to vSAN objects, disk groups, and components. Here are some common vSAN component troubleshooting steps along with PowerShell examples:

Step 1: Connect to vCenter Server First, open PowerShell with PowerCLI and connect to the vCenter Server using the Connect-VIServer cmdlet. Replace Your_vCenter_Server, Your_Username, and Your_Password with appropriate values.

# Connect to vCenter Server
Connect-VIServer -Server Your_vCenter_Server -User Your_Username -Password Your_Password

Step 2: Check vSAN Cluster Status Verify the overall status of the vSAN cluster to ensure that it is healthy. The Get-Cluster cmdlet can be used to retrieve cluster information, including vSAN status.

# Get vSAN Cluster Status
$vsanCluster = Get-Cluster -Name Your_vSAN_Cluster_Name
$vsanCluster | Select Name, VsanEnabled, VsanHealth

Step 3: Check Disk Group Health Use the Get-VsanDiskGroup cmdlet to retrieve information about vSAN disk groups and verify their health status.

# Get vSAN Disk Groups and Health Status
$vsanDiskGroups = Get-VsanDiskGroup -Cluster $vsanCluster
$vsanDiskGroups | Select Name, State, Health

Step 4: Check Component Health Verify the health status of vSAN components using the Get-VsanComponent cmdlet.

# Get vSAN Components and Health Status
$vsanComponents = $vsanCluster | Get-VsanComponent
$vsanComponents | Select Uuid, IsActive, State, Owner

Step 5: Check vSAN Objects Health Retrieve vSAN object information and verify the health status of vSAN objects using the Get-VsanObject cmdlet.

# Get vSAN Objects and Health Status
$vsanObjects = $vsanCluster | Get-VsanObject
$vsanObjects | Select Uuid, Health, Components

Step 6: Check vSAN Disk Health Ensure that individual vSAN disks are in good health using the Get-VsanDisk cmdlet.

# Get vSAN Disks and Health Status
$vsanDisks = Get-VsanDisk -Cluster $vsanCluster
$vsanDisks | Select DeviceName, Health, IsSsd

Step 7: Check vSAN Datastore Status Verify the vSAN datastore status using the Get-Datastore cmdlet.

# Get vSAN Datastores and Health Status
$vsanDatastores = Get-Datastore -Location $vsanCluster
$vsanDatastores | Select Name, Type, CapacityGB, FreeSpaceGB, ExtensionData.Summary.VsanDatastoreConfigInfo.Enabled

Step 8: Check vSAN Events and Alerts Retrieve vSAN events and alerts to identify any potential issues.

# Get vSAN Events
$vsanEvents = Get-VIEvent -Entity $vsanCluster -MaxSamples 100 | Where-Object { $_.FullFormattedMessage -match "vSAN" }
$vsanEvents | Select CreatedTime, FullFormattedMessage

Step 9: Review vSAN Health Checks Inspect vSAN health checks to identify specific issues affecting vSAN components.

# Get vSAN Health Checks
$vsanHealthChecks = Get-VsanClusterHealth -Cluster $vsanCluster
$vsanHealthChecks | Select CheckId, Result, Message

Step 10: Disconnect from vCenter Server Finally, disconnect from the vCenter Server when you have completed troubleshooting.

# Disconnect from vCenter Server
Disconnect-VIServer -Server Your_vCenter_Server -Confirm:$false

These PowerShell examples demonstrate how to use PowerCLI cmdlets to retrieve important information about vSAN components and verify their health status. When troubleshooting vSAN, it’s essential to pay attention to health checks, events, and alerts to identify and resolve issues effectively. Always exercise caution and ensure you have appropriate permissions before running PowerShell scripts in a production environment.