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What happens if you messed up with CSV Volumes? Solution: Repair-VMConfig
Posted in Virtual Machine Manager, Windows Powershell, Windows Server | No Comment | 1,946 views | 08/06/2014 21:56
Your Hyper-V storage environment crashed and you restored it from a backup or volume snapshot or you want to restore all virtual machines to the Disaster Center via Storage Replication. You added new storage luns into Failover Cluster but CSV names are changed. In that case you may not be able to import Virtual Machines into Hyper-V quickly due to incorrect virtual disk paths.
This script will check all Virtual Machine configs and shows you which configuration is not correct.
Then you can fix it manually or you can fix it via this script.
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| function Repair-VMConfig {
<#
.SYNOPSIS
Function to repair Virtual Machine config after CSV volume path changes.
You should put a volume identifier into CSV volumes to be able to use this script.
Simply put a Volume1.CSV into Volume1 as a volume identifier.
.DESCRIPTION
In some cases, CSV volume names could be changed. So you may not start your virtual machines due to incorrect virtual disk paths.
This function is written to fix this issue. It finds all Virtual Machines configuration problems and shows you as a output.
If you use ApplyChanges switch, it stops all Hyper-V Management Services in all Cluster Nodes, backups VM configs and fix incorrect VM virtual disk paths. Restarts Hyper-V Management Services after changes.
You should put a volume identifier into CSV volumes to be able to use this script. Simply put a Volume1.CSV into Volume1 as a volume identifier.
.PARAMETER WhatIf
Display what would happen if you would run the function with given parameters.
.PARAMETER Confirm
Prompts for confirmation for each operation. Allow user to specify Yes/No to all option to stop prompting.
.EXAMPLE
Repair-VMConfig
Just shows VM configuration problems and do not take any action unless you add -ApplyChanges switch.
.EXAMPLE
Repair-VMConfig -ApplyChanges
Stops all Hyper-V Management Services in all Cluster Nodes, backups VM configs and fix incorrect VM virtual disk paths. Restarts Hyper-V Management Services after changes.
.INPUTS
ApplyChanges switch to apply changes on Virtual Machines.
.OUTPUTS
None
.NOTES
Author: Yusuf Ozturk
Website: http://www.yusufozturk.info
Email: ysfozy@gmail.com
Date created: 07-June-2014
Last modified: 08-June-2014
Version: 1.2
.LINK
http://www.yusufozturk.info
http://twitter.com/yusufozturk
#>
[CmdletBinding(SupportsShouldProcess = $true)]
param (
# Do you confirm changes on Virtual Machines?
[Parameter(
Mandatory = $false,
HelpMessage = 'Do you confirm changes on Virtual Machines?')]
[switch]$ApplyChanges = $false,
# Debug Mode
[Parameter(
Mandatory = $false,
HelpMessage = 'Debug Mode')]
[switch]$DebugMode = $false
)
if ($ApplyChanges -eq $True)
{
# Get Cluster Node List
$ClusterNodes = Get-Cluster | Get-ClusterNode
foreach ($ClusterNode in $ClusterNodes)
{
# Stop Hyper-V Management Service
Invoke-Command -ComputerName $ClusterNode -ScriptBlock {
Set-Service "vmms" -StartupType Disabled
Stop-Service "vmms"
}
}
}
# Read All CSV Directories
$CSVVolumes = Get-ChildItem "C:\ClusterStorage"
foreach ($CSVVolume in $CSVVolumes)
{
# Informational Output
Write-Host " "
Write-Host " "
Write-Host "Working on $CSVVolume .." -ForegroundColor Cyan
Write-Host " "
# CSV Volume Name
$CSVVolumeName = $CSVVolume.Name
# Read All VM Config Files
$VMConfigs = Get-ChildItem "C:\ClusterStorage\$CSVVolumeName" -Filter "*.xml" -Recurse
foreach ($VMConfig in $VMConfigs)
{
# Set Replace VM Config Identifier
$ReplaceVMConfig = "0"
# Get VM Config Full Path
$VMConfigPath = $VMConfig.FullName
if ($ApplyChanges -eq $True)
{
# VM Config Backup Name
$VMConfigBackupPath = $VMConfigPath + ".backup"
# Backup Old VM Config
$BackupVMConfig = Copy-Item -Path $VMConfigPath -Destination $VMConfigBackupPath
}
# Informational Output
Write-Host " "
Write-Host "Working on $VMConfigPath .." -ForegroundColor Yellow
# CSV Volume Regex Pattern
$Pattern = '<pathname type="string">(.*?)</pathname>'
# Get VM Config Content
$VMConfigContent = Get-Content "$VMConfigPath"
# Get CSV Volume Name
$RegexResults = $VMConfigContent -match $Pattern
foreach ($RegexResult in $RegexResults)
{
# Search for Virtual Disks
$RegexSearch = [string]$RegexResult -match $Pattern
# Get Virtual Disk Path
$VHDPath = $Null;
$VHDPath = $Matches[1]
if ($VHDPath)
{
# Check VHD Path
$TestVHDPath = $Null;
$TestVHDPath = Test-Path "$VHDPath"
if (!$TestVHDPath)
{
Write-Host "Error: $VHDPath" -ForegroundColor Red
# CSV Volume Pattern
$CSVPattern = "volume\d{1,2}"
# Search for CSV Volume Name
$RegexSearch = [string]$RegexResult -match $CSVPattern
# Get CSV Volume Name
$CSVName = $Null;
$CSVName = $Matches[0]
if ($CSVName -like "Volume*")
{
# Get CSV Volume Filter
$CSVVolumeFilter = "*" + $CSVName + ".CSV"
# Find CSV Directory
$GetCSVDirectory = $Null;
$GetCSVDirectory = (Get-ChildItem "C:\ClusterStorage" -Filter "$CSVVolumeFilter" -Recurse).Directory.FullName
if ($GetCSVDirectory -ne $Null)
{
# Get Config Content
$ConfigContent = Get-Content -Path "$VMConfigPath"
# Get New CSV Volume
$NewCSVVolume = $GetCSVDirectory.Split("\")[-1]
# Check CSV Volume
if ($NewCSVVolume -like "Volume*")
{
$NewCSVVolume = "TEMPORARY_VOLUME" + $NewCSVVolume.Substring("0,6")
if ($ApplyChanges -eq $True)
{
# Replace CSV Volume
$Regex = New-Object Text.RegularExpressions.Regex $CSVName, "None"
$NewConfigContent = $Regex.Replace($ConfigContent, $NewCSVVolume)
# Save Changes on Config
Set-Content -Value "$NewConfigContent" -Path "$VMConfigPath" -Encoding "BigEndianUnicode"
# Set Replace VM Config Identifier
$ReplaceVMConfig = "1"
}
}
else
{
Write-Host "Error: Could not get volume name of $VHDPath" -ForegroundColor Red
}
}
else
{
Write-Host "Error: Could not find any volume identifier for $CSVName" -ForegroundColor Red
}
}
else
{
Write-Host "Error: $VHDPath is not on a CSV Volume" -ForegroundColor Red
}
}
else
{
Write-Host "OK: $VHDPath" -ForegroundColor Green
}
}
}
if ($ApplyChanges -eq $True)
{
if ($ReplaceVMConfig -eq "1")
{
# Get Config Content
$ConfigContent = Get-Content -Path "$VMConfigPath"
# CSV Volume Prefix
$CSVVolumePrefix = "Volume"
# Replace CSV Volume
$Regex = New-Object Text.RegularExpressions.Regex "TEMPORARY_VOLUME", "None"
$NewConfigContent = $Regex.Replace($ConfigContent, $CSVVolumePrefix)
# Save Changes on Config
Set-Content -Value "$NewConfigContent" -Path "$VMConfigPath" -Encoding "BigEndianUnicode"
}
}
}
}
if ($ApplyChanges -eq $True)
{
foreach ($ClusterNode in $ClusterNodes)
{
# Start Hyper-V Management Service
Invoke-Command -ComputerName $ClusterNode -ScriptBlock {
Set-Service "vmms" -StartupType Automatic
Start-Service "vmms"
}
}
}
} |
function Repair-VMConfig {
<#
.SYNOPSIS
Function to repair Virtual Machine config after CSV volume path changes.
You should put a volume identifier into CSV volumes to be able to use this script.
Simply put a Volume1.CSV into Volume1 as a volume identifier.
.DESCRIPTION
In some cases, CSV volume names could be changed. So you may not start your virtual machines due to incorrect virtual disk paths.
This function is written to fix this issue. It finds all Virtual Machines configuration problems and shows you as a output.
If you use ApplyChanges switch, it stops all Hyper-V Management Services in all Cluster Nodes, backups VM configs and fix incorrect VM virtual disk paths. Restarts Hyper-V Management Services after changes.
You should put a volume identifier into CSV volumes to be able to use this script. Simply put a Volume1.CSV into Volume1 as a volume identifier.
.PARAMETER WhatIf
Display what would happen if you would run the function with given parameters.
.PARAMETER Confirm
Prompts for confirmation for each operation. Allow user to specify Yes/No to all option to stop prompting.
.EXAMPLE
Repair-VMConfig
Just shows VM configuration problems and do not take any action unless you add -ApplyChanges switch.
.EXAMPLE
Repair-VMConfig -ApplyChanges
Stops all Hyper-V Management Services in all Cluster Nodes, backups VM configs and fix incorrect VM virtual disk paths. Restarts Hyper-V Management Services after changes.
.INPUTS
ApplyChanges switch to apply changes on Virtual Machines.
.OUTPUTS
None
.NOTES
Author: Yusuf Ozturk
Website: http://www.yusufozturk.info
Email: ysfozy@gmail.com
Date created: 07-June-2014
Last modified: 08-June-2014
Version: 1.2
.LINK
http://www.yusufozturk.info
http://twitter.com/yusufozturk
#>
[CmdletBinding(SupportsShouldProcess = $true)]
param (
# Do you confirm changes on Virtual Machines?
[Parameter(
Mandatory = $false,
HelpMessage = 'Do you confirm changes on Virtual Machines?')]
[switch]$ApplyChanges = $false,
# Debug Mode
[Parameter(
Mandatory = $false,
HelpMessage = 'Debug Mode')]
[switch]$DebugMode = $false
)
if ($ApplyChanges -eq $True)
{
# Get Cluster Node List
$ClusterNodes = Get-Cluster | Get-ClusterNode
foreach ($ClusterNode in $ClusterNodes)
{
# Stop Hyper-V Management Service
Invoke-Command -ComputerName $ClusterNode -ScriptBlock {
Set-Service "vmms" -StartupType Disabled
Stop-Service "vmms"
}
}
}
# Read All CSV Directories
$CSVVolumes = Get-ChildItem "C:\ClusterStorage"
foreach ($CSVVolume in $CSVVolumes)
{
# Informational Output
Write-Host " "
Write-Host " "
Write-Host "Working on $CSVVolume .." -ForegroundColor Cyan
Write-Host " "
# CSV Volume Name
$CSVVolumeName = $CSVVolume.Name
# Read All VM Config Files
$VMConfigs = Get-ChildItem "C:\ClusterStorage\$CSVVolumeName" -Filter "*.xml" -Recurse
foreach ($VMConfig in $VMConfigs)
{
# Set Replace VM Config Identifier
$ReplaceVMConfig = "0"
# Get VM Config Full Path
$VMConfigPath = $VMConfig.FullName
if ($ApplyChanges -eq $True)
{
# VM Config Backup Name
$VMConfigBackupPath = $VMConfigPath + ".backup"
# Backup Old VM Config
$BackupVMConfig = Copy-Item -Path $VMConfigPath -Destination $VMConfigBackupPath
}
# Informational Output
Write-Host " "
Write-Host "Working on $VMConfigPath .." -ForegroundColor Yellow
# CSV Volume Regex Pattern
$Pattern = '<pathname type="string">(.*?)</pathname>'
# Get VM Config Content
$VMConfigContent = Get-Content "$VMConfigPath"
# Get CSV Volume Name
$RegexResults = $VMConfigContent -match $Pattern
foreach ($RegexResult in $RegexResults)
{
# Search for Virtual Disks
$RegexSearch = [string]$RegexResult -match $Pattern
# Get Virtual Disk Path
$VHDPath = $Null;
$VHDPath = $Matches[1]
if ($VHDPath)
{
# Check VHD Path
$TestVHDPath = $Null;
$TestVHDPath = Test-Path "$VHDPath"
if (!$TestVHDPath)
{
Write-Host "Error: $VHDPath" -ForegroundColor Red
# CSV Volume Pattern
$CSVPattern = "volume\d{1,2}"
# Search for CSV Volume Name
$RegexSearch = [string]$RegexResult -match $CSVPattern
# Get CSV Volume Name
$CSVName = $Null;
$CSVName = $Matches[0]
if ($CSVName -like "Volume*")
{
# Get CSV Volume Filter
$CSVVolumeFilter = "*" + $CSVName + ".CSV"
# Find CSV Directory
$GetCSVDirectory = $Null;
$GetCSVDirectory = (Get-ChildItem "C:\ClusterStorage" -Filter "$CSVVolumeFilter" -Recurse).Directory.FullName
if ($GetCSVDirectory -ne $Null)
{
# Get Config Content
$ConfigContent = Get-Content -Path "$VMConfigPath"
# Get New CSV Volume
$NewCSVVolume = $GetCSVDirectory.Split("\")[-1]
# Check CSV Volume
if ($NewCSVVolume -like "Volume*")
{
$NewCSVVolume = "TEMPORARY_VOLUME" + $NewCSVVolume.Substring("0,6")
if ($ApplyChanges -eq $True)
{
# Replace CSV Volume
$Regex = New-Object Text.RegularExpressions.Regex $CSVName, "None"
$NewConfigContent = $Regex.Replace($ConfigContent, $NewCSVVolume)
# Save Changes on Config
Set-Content -Value "$NewConfigContent" -Path "$VMConfigPath" -Encoding "BigEndianUnicode"
# Set Replace VM Config Identifier
$ReplaceVMConfig = "1"
}
}
else
{
Write-Host "Error: Could not get volume name of $VHDPath" -ForegroundColor Red
}
}
else
{
Write-Host "Error: Could not find any volume identifier for $CSVName" -ForegroundColor Red
}
}
else
{
Write-Host "Error: $VHDPath is not on a CSV Volume" -ForegroundColor Red
}
}
else
{
Write-Host "OK: $VHDPath" -ForegroundColor Green
}
}
}
if ($ApplyChanges -eq $True)
{
if ($ReplaceVMConfig -eq "1")
{
# Get Config Content
$ConfigContent = Get-Content -Path "$VMConfigPath"
# CSV Volume Prefix
$CSVVolumePrefix = "Volume"
# Replace CSV Volume
$Regex = New-Object Text.RegularExpressions.Regex "TEMPORARY_VOLUME", "None"
$NewConfigContent = $Regex.Replace($ConfigContent, $CSVVolumePrefix)
# Save Changes on Config
Set-Content -Value "$NewConfigContent" -Path "$VMConfigPath" -Encoding "BigEndianUnicode"
}
}
}
}
if ($ApplyChanges -eq $True)
{
foreach ($ClusterNode in $ClusterNodes)
{
# Start Hyper-V Management Service
Invoke-Command -ComputerName $ClusterNode -ScriptBlock {
Set-Service "vmms" -StartupType Automatic
Start-Service "vmms"
}
}
}
} You should add -ApplyChanges switch in order to confirm changes on virtual machine configs. That will backup all VM configs before modification. Also that will stop and start all Hyper-V Management Services in all cluster nodes due to changes on VM configs.
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