AzStackHci.EnvironmentChecker

1.2100.2405.201

Obs/bin/ObsDep/content/Powershell/Common/StorageHelpers.psm1

                                <###################################################

 #                                                 #

 #  Copyright (c) Microsoft. All rights reserved.  #

 #                                                 #

 ##################################################>

Import-Module $PSScriptRoot\Tracer.psm1 -DisableNameChecking

Import-Module $PSScriptRoot\ClusterHelpers.psm1 -DisableNameChecking

<#

 .Synopsis

  A helper funtion to convert a unprocessed share path (e.g. '{Infrastructure_2}\CloudMedia\Images\en-us') to its absolute file path.

  By default, it will convert to the local path for a cluster node to access locally.

    e.g. C:\ClusterStorage\Infrastructure_2\Shares\SU1_Infrastructure_2\CloudMedia\Images\en-us.

    e.g. \\v-host1\C$\ClusterStorage\Infrastructure_2\Shares\SU1_Infrastructure_2\CloudMedia\Images\en-us.

    If the $FromNoneClusterNode switch parameter is on, it will convert to the administrative share to the a cluster node for a none cluster machine to access remotely.

#>

function Get-SharePath {

    Param(

        [Parameter(Mandatory = $True)]

        [CloudEngine.Configurations.EceInterfaceParameters]

        $Parameters,

        [Parameter(Mandatory = $True)]

        [AllowEmptyString()]

        [string]

        $UnprocessedPath,

        [Parameter(Mandatory = $True)]

        [string]

        $ClusterName,

        [Parameter(Mandatory = $False)]

        [switch]

        $UseCurrentVersion,

        [Parameter(Mandatory = $False)]

        [switch]

        $FromNoneClusterNode

    )

    # Add support for optionally writing {LatestVersion} string in to the library share paths

    $escapedLatestVersionPattern = [regex]::escape("{LatestVersion}")

    if ($UnprocessedPath -Match $escapedLatestVersionPattern)

    {

        Import-Module $PSScriptRoot\..\Roles\Common\RoleHelpers.psm1 -DisableNameChecking -Verbose:$false | Out-Null

        # Calculate the latest version from input parameters

        $version = Get-InProgressUpdateVersion -Parameters $Parameters

        if ($UseCurrentVersion -or ($version -eq $null))

        {

            $version = ([string]($Parameters.Roles["Cloud"].PublicConfiguration.PublicInfo.Version)).Trim()

        }

        $UnprocessedPath = $UnprocessedPath -replace $escapedLatestVersionPattern, $version

    }

    if ($UnprocessedPath -NotMatch "{.*}")

    {

        throw [System.ArgumentException] "Invalid path input: replace token not found. Path: $UnprocessedPath"

    }

    $replaceToken = [regex]::match($UnprocessedPath,'{([^}]*)}').Groups[1].Value

    # If path contains {DefaultLocalShare} or {DefaultClusterShare}, we need to look up cloud role for getting the defaults

    if ($replaceToken -eq "DefaultLocalShare")

    {

        $sharePath = $Parameters.Roles["Cloud"].PublicConfiguration.PublicInfo.DefaultInfraStorageLocations.DefaultLocalShare

    }

    elseif ($replaceToken -eq "DefaultClusterShare")

    {

        $replaceToken = $Parameters.Roles["Cloud"].PublicConfiguration.PublicInfo.DefaultInfraStorageLocations.DefaultClusterShare

        $sharePath = Get-ClusterShare -Parameters $Parameters -ClusterName $ClusterName -ShareType $replaceToken

    }

    else

    {

        $sharePath = Get-ClusterShare -Parameters $Parameters -ClusterName $ClusterName -ShareType $replaceToken

    }

    if ($FromNoneClusterNode)

    {

        $activeNode = Get-ActiveClusterNodes -Parameters $Parameters -ClusterName $ClusterName | select -First 1

        $sharePath = $sharePath -replace 'C:', "\\$activeNode\c$"

    }

    $result = $UnprocessedPath -replace "{[^}]*}", $sharePath

    Trace-Execution "Get-SharePath: $UnprocessedPath -> $result"

    return $result

}

function Get-SharePathVersions {

    Param(

        [Parameter(Mandatory = $True)]

        [CloudEngine.Configurations.EceInterfaceParameters]

        $Parameters,

        [Parameter(Mandatory = $True)]

        [AllowEmptyString()]

        [string]

        $UnprocessedPath,

        [Parameter(Mandatory = $True)]

        [string]

        $ClusterName

    )

    $result = [System.Collections.ArrayList]::new()

    $escapedLatestVersionPattern = [regex]::escape("{LatestVersion}")

    if ($UnprocessedPath -Match $escapedLatestVersionPattern)

    {

        if ($UnprocessedPath -NotMatch "{.*}")

        {

            throw [System.ArgumentException] "Invalid path input: replace token not found. Path: $UnprocessedPath"

        }

        $replaceToken = [regex]::match($UnprocessedPath,'{([^}]*)}').Groups[1].Value

        # If path contains {DefaultLocalShare} or {DefaultClusterShare}, we need to look up cloud role for getting the defaults

        if ($replaceToken -eq "DefaultLocalShare")

        {

            $sharePath = $Parameters.Roles["Cloud"].PublicConfiguration.PublicInfo.DefaultInfraStorageLocations.DefaultLocalShare

        }

        elseif ($replaceToken -eq "DefaultClusterShare")

        {

            $replaceToken = $Parameters.Roles["Cloud"].PublicConfiguration.PublicInfo.DefaultInfraStorageLocations.DefaultClusterShare

            $sharePath = Get-ClusterShare -Parameters $Parameters -ClusterName $ClusterName -ShareType $replaceToken

        }

        else

        {

            $sharePath = Get-ClusterShare -Parameters $Parameters -ClusterName $ClusterName -ShareType $replaceToken

        }

        $basePath = $UnprocessedPath.Substring(0,$UnprocessedPath.IndexOf($escapedLatestVersionPattern))

        $basePath = $basePath -replace "{[^}]*}", $sharePath

        $versionFolders = Get-ChildItem -Path $basePath | where {$_.Name -match '\d+(?:\.\d+)+'} | where {$_.Name -notmatch '\s+'}

        foreach($versionFolder in $versionFolders){

            $UnprocessedPath = $UnprocessedPath

            $path = $UnprocessedPath -replace $escapedLatestVersionPattern, $versionFolder.Name -replace "{[^}]*}", $sharePath

            $result.Add($path) | Out-Null

        }

    }

    return $result

}

<#

 .Synopsis

  Return the local path for an cluster shared infrastructure volume

#>

Function Get-ClusterShare {

    Param(

        [Parameter(Mandatory = $True)]

        [CloudEngine.Configurations.EceInterfaceParameters]

        $Parameters,

        [Parameter(Mandatory = $True)]

        [string]

        $ClusterName,

        [Parameter(Mandatory = $True)]

        [ValidateSet("Infrastructure", "Infrastructure_2", "Infrastructure_3")]

        [string]

        $ShareType

    )

    $storageServerPrefix = $Parameters.Roles["Cluster"].PublicConfiguration.Clusters.Node | Where-Object Name -eq $ClusterName | Select-Object -ExpandProperty StorageServerPrefix

    $shareObject = $Parameters.Roles["Storage"].PublicConfiguration.PublicInfo.Shares.Share | Where-Object Type -eq $ShareType

    if (-not $shareObject)

    {

        throw [System.ArgumentException] "Invalid input: the cluster $ClusterName storage role contains no configuration for a share of type $ShareType."

    }

    $volumeName = $shareObject.Name

    $shareName = "${storageServerPrefix}_$($shareObject.Name)"

    $fullLocalPath = "C:\ClusterStorage\$volumeName\Shares\$shareName"

    return $fullLocalPath

}

function Test-LocalHostHasClusterStoragePath

{

    [CmdletBinding()]

    param(

        [Parameter(Mandatory = $true)]

        [CloudEngine.Configurations.EceInterfaceParameters]

        $Parameters

    )

    $ErrorActionPreference = "Stop"

    Trace-Execution "Testing for presence of local CSV path on this node."

    Test-Path "C:\ClusterStorage"

}

function Get-LocalCsvPathFromSharePath

{

    [CmdletBinding()]

    param(

        [Parameter(Mandatory = $true)]

        [CloudEngine.Configurations.EceInterfaceParameters]

        $Parameters,

        [Parameter(Mandatory = $true)]

        [string]

        $UNCSharePath,

        [Parameter(Mandatory = $false)]

        [string]

        $ClusterName

    )

    $ErrorActionPreference = "Stop"

    Trace-Execution "Getting local CSV path for share path $UNCSharePath on cluster $ClusterName."

    $pathParts = $UNCSharePath.Split("\")

    # Share path will look like \\SU1FileServer\SU1_Infrastructure_2\CloudMedia\WindowsUpdates\1.0.170925.1

    $smbShareName = $pathParts[3]

    if (-not $ClusterName)

    {

        $ClusterName = Get-ManagementClusterName $Parameters

    }

    $smbShare = Invoke-Command -ComputerName $ClusterName -ScriptBlock { Get-SmbShare | where Name -eq $using:smbShareName }

    if (-not $smbShare)

    {

        throw "An SMB share with the name '$smbShareName' could not be found on $ClusterName."

    }

    Trace-Execution "Found SMB share $smbShareName with local CSV path $($smbShare.Path)."

    return (Join-Path $smbShare.Path ($pathParts[4..$pathParts.Count] -join "\"))

}

<#

 .Synopsis

  Returns the name of the management cluster

#>

function Get-ManagementClusterName

{

    [CmdletBinding()]

    param

    (

        [Parameter(Mandatory = $true)]

        [CloudEngine.Configurations.EceInterfaceParameters]

        $Parameters

    )

    $ErrorActionPreference = "Stop"

    $publicInfo = $Parameters.Roles["Cluster"].PublicConfiguration

    $clusterName = $publicInfo.Clusters.Node | ? IsManagementCluster -eq "true" | Select-Object -ExpandProperty "Name"

    return $clusterName

}

<#

 .Synopsis

  Returns the host names of the management cluster

#>

function Get-ManagementClusterNodes

{

    [CmdletBinding()]

    param

    (

        [Parameter(Mandatory = $true)]

        [CloudEngine.Configurations.EceInterfaceParameters]

        $Parameters

    )

    $ErrorActionPreference = "Stop"

    $managementClusterName = Get-ManagementClusterName $Parameters

    $physicalMachinesRole = $Parameters.Roles["BareMetal"].PublicConfiguration

    $hostNames = @($physicalMachinesRole.Nodes.Node | ? RefClusterId -eq $managementClusterName | % Name)

    return $hostNames

}

<#

 .Synopsis

  Returns the RefClusterId of the Node

#>

function Get-NodeRefClusterId

{

    [CmdletBinding()]

    param

    (

        [Parameter(Mandatory = $true)]

        [CloudEngine.Configurations.EceInterfaceParameters]

        $Parameters,

        [Parameter(Mandatory = $true)]

        [string]

        $RoleName,

        [Parameter(Mandatory = $true)]

        [string]

        $NodeName

    )

    $ErrorActionPreference = "Stop"

    $node = $Parameters.Roles[$RoleName].PublicConfiguration.Nodes.Node | ? Name -ieq $NodeName

    $clusterName = $node.RefClusterId

    return $clusterName

}

<#

 .Synopsis

  Returns the RefNodeId of the Node

#>

function Get-NodeRefNodeId

{

    [CmdletBinding()]

    param

    (

        [Parameter(Mandatory = $true)]

        [CloudEngine.Configurations.EceInterfaceParameters]

        $Parameters,

        [Parameter(Mandatory = $true)]

        [string]

        $RoleName,

        [Parameter(Mandatory = $true)]

        [string]

        $NodeName

    )

    $ErrorActionPreference = "Stop"

    $node = $Parameters.Roles[$RoleName].PublicConfiguration.Nodes.Node | ? Name -ieq $NodeName

    return $node.RefNodeId

}

<#

 .Synopsis

  A replacement for Test-Path:

  1. differentiate file non-existence vs unexpected situlation such as location not accessible / share unavailability

     this cmdlet will return False on file non-existence; and throw the insider exception on other unexpected situlation

  2. optional retry feature, so that less random error will occure with logic like `if (-not test-path $Path) { throw "not found"}`

#>

function Test-PathStrict

{

    [CmdletBinding()]

    param(

        [Parameter(Mandatory = $true)]

        [string[]]

        $Path,

        [Parameter(Mandatory=$false)]

        [ValidateSet("Any", "Container", "Leaf")]

        [string] $PathType = 'Any',

        [Parameter(Mandatory=$false)]

        [UInt32] $RetryCount = 0,

        [Parameter(Mandatory=$false)]

        [UInt32] $RetryIntervalInSeconds = 60,

        [Parameter(Mandatory=$false)]

        [switch] $NoRetryOnItemNotFound = $false

    )

    $ErrorActionPreference = "Stop"

    $unexpectedException = $null

    for ($i = 0; $i -le $RetryCount; $i += 1) {

        if ($i -gt 0) {

            Start-Sleep -Seconds $RetryIntervalInSeconds

        }

        try {

            $r = dir -Path $Path

            if ($PathType -ieq 'Leaf') {

                if ($r.GetType().Name -ne 'FileInfo') {

                    throw "Path exists for $Path, however PathType not match (expected: Leaf, actual: Container)"

                }

            } elseif ($PathType -ieq 'Container') {

                if ($r.GetType().Name -eq 'FileInfo') {

                    throw "Path exists for $Path, however PathType not match (expected: Container, actual: Leaf)"

                }

            }

            return $true

        }

        catch {

            # `dir` will throw a single ItemNotFoundException when the folder/file doesn't exists but filesystem/smb-share is accessible & well connected

            # otherwise, UnauthorizedAccessException or other exception will be thrown together with ItemNotFoundException

            if ($_.length -eq 1 -and $_[0].Exception.GetType().Name -eq 'ItemNotFoundException') {

                if ($NoRetryOnItemNotFound) {

                    return $false

                }

                $unexpectedException = $null

            } else {

                $unexpectedException = $_

            }

        }

    }

    if ($unexpectedException -ne $null) {

        throw $unexpectedException;

    }

    return $false

}

<#

 .Synopsis

  A safe replacement for Test-Path, compare to Test-PathStrict:

  1. it doesn't retry on ItemNotFound

  2. during unexpected situlation (transient SMB connection issue), it by-default retry once after 60 seconds; then if the exception doesn't recover, it do the actual throwing

#>

function Test-PathSafe

{

    [CmdletBinding()]

    param(

        [Parameter(Mandatory = $true)]

        [string[]]

        $Path,

        [Parameter(Mandatory=$false)]

        [ValidateSet("Any", "Container", "Leaf")]

        [string] $PathType = 'Any',

        [Parameter(Mandatory=$false)]

        [UInt32] $RetryCount = 1,

        [Parameter(Mandatory=$false)]

        [UInt32] $RetryIntervalInSeconds = 60

    )

    $ErrorActionPreference = "Stop"

    return (Test-PathStrict -Path $Path -PathType $PathType -RetryCount $RetryCount -RetryIntervalInSeconds $RetryIntervalInSeconds -NoRetryOnItemNotFound)

}

Export-ModuleMember -Function Get-ClusterShare

Export-ModuleMember -Function Get-LocalCsvPathFromSharePath

Export-ModuleMember -Function Test-LocalHostHasClusterStoragePath

Export-ModuleMember -Function Get-ManagementClusterName

Export-ModuleMember -Function Get-ManagementClusterNodes

Export-ModuleMember -Function Get-NodeRefClusterId

Export-ModuleMember -Function Get-NodeRefNodeId

Export-ModuleMember -Function Get-SharePath

Export-ModuleMember -Function Get-SharePathVersions 

Export-ModuleMember -Function Test-PathSafe

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