In VMware PowerCLI, you can use the Set-ScsiLunPath cmdlet to modify the configuration of paths for a specific SCSI LUN. To modify paths for multiple LUNs, you can use a loop to iterate through the LUNs and apply the necessary changes. Here’s an example script that demonstrates how to set paths for multiple LUNs using PowerCLI:

# Connect to your vCenter Server
Connect-VIServer -Server YourVCenterServer -User YourUsername -Password YourPassword

# Get the ESXi hosts where the LUNs are presented
$ESXiHosts = Get-VMHost -Name "ESXiHostName1", "ESXiHostName2"  # Add ESXi host names

# Define the list of SCSI LUN IDs and paths to configure
$LUNPaths = @{
    "naa.6006016055502500d900000000000000" = "vmhba1:C0:T0:L0",
    "naa.6006016055502500d900000000000001" = "vmhba1:C0:T0:L1"
    # Add more LUN IDs and paths as needed
}

# Loop through ESXi hosts
foreach ($ESXiHost in $ESXiHosts) {
    # Get the list of LUNs for the host
    $LUNs = Get-ScsiLun -VMHost $ESXiHost

    # Loop through LUNs and set paths
    foreach ($LUN in $LUNs) {
        $LUNId = $LUN.CanonicalName

        if ($LUNPaths.ContainsKey($LUNId)) {
            $Path = $LUNPaths[$LUNId]
            Set-ScsiLunPath -ScsiLun $LUN -Path $Path -Confirm:$false
            Write-Host "Path set for LUN $($LUN.CanonicalName) on $($ESXiHost.Name)"
        } else {
            Write-Host "Path not configured for LUN $($LUN.CanonicalName) on $($ESXiHost.Name)"
        }
    }
}

# Disconnect from the vCenter Server
Disconnect-VIServer -Server * -Confirm:$false

Replace YourVCenterServer, YourUsername, YourPassword, ESXiHostName1, ESXiHostName2, and the example LUN IDs and paths with your actual vCenter Server details, ESXi host names, and the desired LUN configurations.

In this script:

1. Connect to the vCenter Server using Connect-VIServer.
2. Get the list of ESXi hosts using Get-VMHost.
3. Define the LUN IDs and paths in the $LUNPaths hash table.
4. Loop through ESXi hosts and retrieve the list of LUNs using Get-ScsiLun.
5. Loop through LUNs, check if a path is defined in the $LUNPaths hash table, and use Set-ScsiLunPath to set the path.
6. Disconnect from the vCenter Server using Disconnect-VIServer.

To remove snapshots from all VMs that have more than two snapshots using VMware PowerCLI (PowerShell module for managing VMware environments), you can use the following PowerShell script as a starting point:

# Connect to your vCenter Server
Connect-VIServer -Server YourVCenterServer -User YourUsername -Password YourPassword

# Get all VMs with more than two snapshots
$VMs = Get-VM | Where-Object { $_.ExtensionData.Snapshot.RootSnapshotList.Count -gt 2 }

# Loop through VMs and remove snapshots
foreach ($VM in $VMs) {
    $Snapshots = $VM | Get-Snapshot
    $Snapshots | Sort-Object -Property Created -Descending | Select-Object -Skip 2 | Remove-Snapshot -Confirm:$false
    Write-Host "Snapshots removed from $($VM.Name)"
}

# Disconnect from the vCenter Server
Disconnect-VIServer -Server * -Confirm:$false

Please note the following points about this script:

1. Replace YourVCenterServer, YourUsername, and YourPassword with your actual vCenter Server details.
2. The script retrieves all VMs with more than two snapshots using Get-VM and filters them using Where-Object.
3. The snapshots are sorted by their creation date in descending order, and the two most recent snapshots are skipped (to retain the two most recent snapshots).
4. The -Confirm:$false parameter is used with Remove-Snapshot to avoid confirmation prompts for each snapshot removal.

Before running this script, make sure you have VMware PowerCLI installed and that you are using it in a controlled environment, as removing snapshots can impact VMs and their data. Test the script on a smaller scale or non-production environment to ensure it behaves as expected.

Always ensure you have backups and a proper understanding of the impact of snapshot removal on your VMs before performing such operations in a production environment.

Install VMware PowerCLI: If you haven’t installed PowerCLI already, you can download and install it from the PowerShell Gallery. Open a PowerShell session with Administrator privileges and run the following command:

Install-Module -Name VMware.PowerCLI

Connect to vCenter: Connect to your vCenter server using PowerCLI. Replace “vcenter_server” with the IP or FQDN of your vCenter server and enter your vCenter credentials when prompted:

Connect-VIServer -Server vcenter_server

Get a List of ESXi Hosts: Run the following command to retrieve a list of all ESXi hosts managed by the vCenter server:

$esxiHosts = Get-VMHost

Install VAAI Plugin on Each ESXi Host: Loop through each ESXi host and install the VAAI plugin using the “esxcli” command. Replace “esxi_username” and “esxi_password” with the ESXi host’s root credentials:

foreach ($esxiHost in $esxiHosts) {
    $esxiConnection = Connect-VIServer -Server $esxiHost -User esxi_username -Password esxi_password
    if ($esxiConnection) {
        $esxiHostName = $esxiHost.Name
        Write-Host "Installing VAAI plugin on $esxiHostName..."
        $installScript = "esxcli software vib install -v /path/to/vaaipackage.vib --no-sig-check"
        Invoke-SSHCommand -SSHHost $esxiHostName -SSHUser esxi_username -SSHPassword esxi_password -SSHCommand $installScript
    }
}

Make sure to replace “/path/to/vaaipackage.vib” with the actual path to the VAAI plugin file (e.g., “esxcli software vib install -v /vmfs/volumes/datastore1/vaaipackage.vib –no-sig-check”).

5. Disconnect from vCenter: Finally, disconnect from the vCenter server when the installation process is complete:

Disconnect-VIServer -Server $esxiHosts.Server -Force -Confirm:$false

Re-IP’ing ESXi hosts in vCenter using a PowerShell script involves several steps and should be handled with caution, as it can disrupt the virtualized environment. The following script assumes you have VMware PowerCLI installed and connected to your vCenter server.

Before running the script, ensure you have a backup of your current configuration, and understand the implications of re-IP’ing your ESXi hosts.

# Connect to vCenter server
Connect-VIServer -Server YOUR_VCENTER_SERVER -User YOUR_USERNAME -Password YOUR_PASSWORD

# Define the old and new IP addresses
$oldIP = "OLD_IP_ADDRESS"
$newIP = "NEW_IP_ADDRESS"
$subnetMask = "NEW_SUBNET_MASK"
$gateway = "NEW_GATEWAY"

# Retrieve all ESXi hosts managed by vCenter
$esxiHosts = Get-VMHost

# Reconfigure network settings for each ESXi host
foreach ($esxiHost in $esxiHosts) {
    Write-Host "Reconfiguring network settings for $($esxiHost.Name)..."
    $esxiHostNic = Get-VMHostNetworkAdapter -VMHost $esxiHost | Where-Object { $_.Type -eq "Management" }

    # Set new IP address, subnet mask, and gateway
    $esxiHostNic | Set-VMHostNetworkAdapter -IP $newIP -SubnetMask $subnetMask -Gateway $gateway -Confirm:$false

    # Test the new connection and make sure it is responding
    if (Test-Connection -ComputerName $newIP -Count 1 -Quiet) {
        Write-Host "ESXi host $($esxiHost.Name) has been reconfigured successfully."
    } else {
        Write-Host "Failed to reconfigure ESXi host $($esxiHost.Name). Please verify the new network settings manually."
    }
}

# Disconnect from vCenter server
Disconnect-VIServer -Server $null

Replace the placeholders YOUR_VCENTER_SERVER, YOUR_USERNAME, YOUR_PASSWORD, OLD_IP_ADDRESS, NEW_IP_ADDRESS, NEW_SUBNET_MASK, and NEW_GATEWAY with appropriate values.

This script will loop through all ESXi hosts managed by vCenter, reconfigure the network settings for the management interface with the new IP address, subnet mask, and gateway, and then test the new connection to ensure it is responsive.

Again, exercise extreme caution when using this script, and always have a backup and a rollback plan ready before making any changes to your production environment.

1. Install VMware PowerCLI: If you haven’t installed VMware PowerCLI yet, download and install it from the official VMware website: https://code.vmware.com/web/dp/tool/vmware-powercli/12.5.0
2. Connect to vCenter Server: Open PowerShell or PowerShell ISE and connect to your vCenter Server using the Connect-VIServer cmdlet. Replace 'YOUR_VCENTER_SERVER' with the IP address or FQDN of your vCenter Server:

Connect-VIServer -Server 'YOUR_VCENTER_SERVER' -User 'YOUR_USERNAME' -Password 'YOUR_PASSWORD'

Generate the report for tasks: You can use the Get-VIEvent cmdlet in PowerCLI to retrieve events and filter them based on the task type (e.g., backup, clone, snapshot, etc.). Here’s a PowerShell script to generate the report:

# Define the output file path for the report
$outputFile = "C:\Path\To\Your\Report.txt"

# Get all VMs
$vms = Get-VM

# Initialize an empty array to store the events
$taskEvents = @()

# Get events for each VM and filter the ones related to tasks (backup, clone, snapshot, etc.)
foreach ($vm in $vms) {
    $events = Get-VIEvent -Entity $vm | Where-Object { $_.GetType().Name -match "TaskEvent" }
    $taskEvents += $events
}

# Generate a report and write it to the output file
$report = @()

foreach ($event in $taskEvents) {
    $vmName = $event.Vm.Name
    $eventType = $event.GetType().Name
    $eventFullType = $event.GetType().FullName
    $eventCreated = $event.CreatedTime
    $eventUserName = $event.UserName
    $eventFullData = $event | Format-List | Out-String

    $reportLine = @"
VM Name: $vmName
Event Type: $eventType
Event Full Type: $eventFullType
Event Created: $eventCreated
Event User Name: $eventUserName
Event Details:
$eventFullData
"@

    $report += $reportLine
}

# Save the report to the output file
$report | Out-File -FilePath $outputFile

# Display success message
Write-Host "Report generated successfully. Check $outputFile for the report."

Disconnect from vCenter Server: After generating the report, it’s a good practice to disconnect from the vCenter Server using the Disconnect-VIServer cmdlet:

Disconnect-VIServer -Server 'YOUR_VCENTER_SERVER' -Force -Confirm:$false

Please make sure to replace 'YOUR_VCENTER_SERVER', 'YOUR_USERNAME', and 'YOUR_PASSWORD' in the script with your vCenter server details. Additionally, modify the $outputFile variable to specify the path and filename for the generated report. The script will search for task-related events for each VM, extract relevant details, and save the report to the specified output file.