Tag Archives: DRS

PowerCLI: Document the ESX Hostname of the vCenter VM


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I was reading Duncan Epping his post: http://www.yellow-bricks.com/2009/10/09/best-practices-running-vcenter-virtual-vsphere/ about Running vCenter virtual. The most of the steps described, you only have to do once but step 5 needs to be documented once in a while

5. Write a procedure to boot the vCenter / AD / DNS / SQL manually in case of a complete power outage occurs.

Nobody likes to document this thing so we will let PowerCLI do this job for us.

First you need to now the VMs. In most cases this will be your Domain Controller, Database Server and of course the vCenter VM.

$vms =  Get-VM "DC01", "DB01", "VC01" | Sort Name
$vms | Select Name, @{N="Cluster";E={Get-Cluster -VM $_}}, `
@{N="VMHost";E={Get-VMHost -VM $_}} 

The one-liner above will return the VM name, Cluster Name and ESX Host name:

 image

Now you are able to document where your VMs are. But you still need to put this information somewhere. So I created a simple script which will export the information displayed above to a CSV file. The script will also remove files older than 7 days.

You can change the variable if you want.

$now = Get-Date
$days = "7"
$targetFolder = "C:\vCenter"

if (Test-Path $targetFolder)
{
    Write-Host $targetFolder "Already exists"
}
else
{
    New-Item $targetFolder -type directory
    Write-Host $targetFolder "Created"
}

$lastWrite = $now.AddDays(-$days)
$files = get-childitem $targetFolder -include *.csv -recurse `
    | Where {$_.LastWriteTime -le "$lastWrite"} 

if (($files | Measure-Object).count -gt 0){
foreach ($file in $files)
{write-host "Deleting File $File" -foregroundcolor "Red"; `
    Remove-Item $file | out-null}
}

$filename = "C:\vCenter\" + (Get-Date -format  'yyyy-MM-dd hh-mm-ss') + '.csv'
$vms =  Get-VM "DC01", "DB01", "VC01" | Sort Name 
$vms | Select Name, @{N="Cluster";E={Get-Cluster -VM $_}}, `
@{N="VMHost";E={Get-VMHost -VM $_}} | `
Export-Csv -NoTypeInformation $filename

The script will generate a CSV file:

image

The CSV file will look like this:

"Name","Cluster","VMHost"

"DB01","Cluster_01","esx1.ict-freak.local"

"DC01","Cluster_01","esx1.ict-freak.local"

"VC01","Cluster_01","esx1.ict-freak.local"

You can schedule this script on a VM that runs on another cluster or maybe better, schedule the script on a physical box. If you want to know how to schedule a Powershell/CLI script, go check out this post from Alan Renouf: http://www.virtu-al.net/2009/07/10/running-a-powercli-scheduled-task/

Now you are able to track the most important VMs in your environment.

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PowerCLI: Export, Import and Create DRS Rules v2


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In my first post about this subject, I showed a script create by the PowerCLI Master @LucD. A couple of minutes later Hugo Peeters posted a comment why I did not used the object-oriented approach of Powershell. He also posted an example. So in this post I will show you the other way by using Export/Import-CliXml.

First we start with the export part. The following one-liner will export all the DRS Rules to a XML file:

# Export DRS
Get-Cluster -Name "Cluster_01" | Get-DrsRule | `
Export-CliXml 'C:\scripts\drs.xml'

The XML file look like this:

<?xml version="1.0" encoding="utf-16"?>
<Objs Version="1.1.0.1" xmlns="http://schemas.microsoft.com/powershell/2004/04">
  <Obj RefId="0">
    <TN RefId="0">
      <T>VMware.VimAutomation.Client20.DrsVMAffinityRuleImpl</T>
      <T>System.Object</T>
    </TN>
    <ToString>VMware.VimAutomation.Client20.DrsVMAffinityRuleImpl</ToString>
    <Props>
      <S N="Name">production</S>
      <B N="Enabled">true</B>
      <S N="ClusterId">ClusterComputeResource-domain-c7</S>
      <B N="KeepTogether">true</B>
      <Obj N="VMIds" RefId="1">
        <TN RefId="1">
          <T>System.String[]</T>
          <T>System.Array</T>
          <T>System.Object</T>
        </TN>
        <LST>
          <S>VirtualMachine-vm-23</S>
          <S>VirtualMachine-vm-27</S>
          <S>VirtualMachine-vm-29</S>
          <S>VirtualMachine-vm-33</S>
        </LST>
      </Obj>
    </Props>
  </Obj>
</Objs>

The next one-liner will import the XML file, which we earlier created with the export one-liner. After the import, the one-liner will create a DRS rule:

# Import DRS
ForEach ($rule in (Import-CliXml 'C:\scripts\drs.xml')){
    New-DrsRule -Cluster (Get-Cluster -Name "Cluster_01") `
    -Name $rule.Name -Enabled $rule.Enabled `
    -KeepTogether $rule.KeepTogether `
    -VM (Get-VM -Id $rule.VmIds)}

 

If you want to see the DRS Rules for a cluster via the PowerCLI, You can run the following one-liner:

# DRS Rules One-Liner
Get-DrsRule -Cluster (Get-Cluster -Name Cluster_01) `
| Sort Name | Select Name, @{N="Enabled";E={$_.Enabled}}, `
@{N="KeepTogether";E={$_.KeepTogether}},`
@{N="Virtual Machines";E={$_.VMIds | % { Get-VM -Id $_ | `
% {$_.Name} }}} 

The following output will be generated:

Name Enabled KeepTogether Virtual Machines
appliances False False Nagios, vMA
production True True DC01,VC01,MC01,MAIL01

Before you can create a XML file with your new rules, you need to get the ID’s of the Cluster and the VM. You can get these ID’s via the following one-liner:

Get-VM | Sort Name | Select Name, `
@{N="VM ID";E={$_.Id}}, `
@{N="Cluster Name";E={Get-Cluster -VM $_}}, `
@{N="Cluster ID";E={Get-Cluster -VM $_ | % {$_.Id}}} | fl *

The output will look like this.

image

or you can export it to a CSV file:

Get-VM | Sort Name | Select Name, `
@{N="VM ID";E={$_.Id}}, `
@{N="Cluster Name";E={Get-Cluster -VM $_}}, `
@{N="Cluster ID";E={Get-Cluster -VM $_ | % {$_.Id}}} | `
Export-CSV -NoTypeInformation "D:\scripts\ps\vmids.csv"

 

Now you have to create a XML file. You can use a file, you created with the export DRS one-liner and change the following lines:

image

When you’re done with the XML file, you can run the Import DRS one-liner to import your new Rules. When you open the Cluster properties you will see that the new rule is added:

image

PowerCLI: Export, Import and Create DRS Rules


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I was trying to create a DRS Rule creation script but after a short search on the PowerCLI communities, I found some excellent stuff from @LucD. These are two scripts for Exporting and importing DRS rules.

To export your DRS-Rules, you can run the next script. The only thing you have to change is <cluster-name> to your cluster name.

#DRS-export-rules.PS1
$outfile = "C:\rules.txt" Remove-Item $outfile $clusterName = <cluster-name> $rules = get-cluster -Name $clusterName | Get-DrsRule foreach($rule in $rules){ $line = (Get-View -Id $rule.ClusterId).Name $line += ("," + $rule.Name + "," + $rule.Enabled + "," + $rule.KeepTogether) foreach($vmId in $rule.VMIds){ $line += ("," + (Get-View -Id $vmId).Name) } $line | Out-File -Append $outfile }

 

The import script looks like this:

#DRS-import-rules.PS1

$file = "C:\rules.txt"
$rules = Get-Content $file

foreach($rule in $rules){
  $ruleArr = $rule.Split(",")
  if($ruleArr[2] -eq "True"){$rEnabled = $true} else {$rEnabled = $false}
  if($ruleArr[3] -eq "True"){$rTogether = $true} else {$rTogether = $false}
  get-cluster $ruleArr[0] | `
    New-DrsRule -Name $ruleArr[1] -Enabled $rEnabled `
    -KeepTogether $rTogether `
    -VM (Get-VM -Name ($ruleArr[4..($ruleArr.Count - 1)])) 
}

 

If you want to create a new DRS-Rules, you only have to create your own rules.txt file like this:

<cluster-name>True,True,<vmname>,<vmname2>,<vmname3>

<cluster-name>,False,True,<vmname>,<vmname2>

Now run the Import DRS-Rules script and in a blink of an eye, the new rules are created.

 

Source: http://communities.vmware.com/thread/195733?start=10&tstart=0

VMware: ESX 3.5 Update 3 VM’s spontaneously reboot


Verschillende blogs melden deze bug al eerder. Bij deze plaats ik ook nog even een post.

Ivo schrijft het volgende op zijn blog: http://www.ivobeerens.nl

We disabled in HA the option “Virtual Machine Monitoring” and set DRS to manual.  The problem with Virtual Machine monitoring is:

The Virtual Machine heartbeats are being dropped which is triggered by VMotion and the VM gets reset by the HA feature as it thinks it has gone offline. Since the feature is now off it should be safe to turn on DRS again.

There are more people who have this problem, read the following post on the VMware forum, 3.5U3 – any guinea pigs yet?.

I made a support request @ VMware. The told me today that 20 November patch 10 for VMware 3.5 Update 3 will be released. Patch 10 fixes SOME random reboot problems in Update 3. I hope it resolves this nasty issue.

 

Bron: http://www.ivobeerens.nl/?p=180

Movie: VMware Distributed Power Mgmt (DPM)


VMware heeft een filmpje op Youtube geplaatst over het gebruik van DRS in samenwerking met DPM. Het gaat hier om een four-node cluster waar een simulatie op draait van een 8 uur durende werkdag. Tijdens deze test wordt het stroomverbruik gemeten bij full load maar ook als de servers in standby staan.

Ik zou zeggen: pak de popcorn erbij en check the movie!

VMware: DRS Performance and Best Practices Paper Posted


VMware Infrastructure 3 provides a set of distributed infrastructure services that make the entire IT environment more serviceable, available, and efficient. Working with VMware ESX 3, VMware VirtualCenter 2, and VMware VMotion, VMware Distributed Resource Scheduler (DRS) dynamically allocates resources to enforce resource management policies while balancing resource usage across multiple ESX hosts. This performance study focuses on understanding the effectiveness and scalability of DRS algorithms. It identifies various scenarios in which you can benefit from DRS and explains how to configure your environment to take best advantage of DRS.

Download de pdf hier: http://www.vmware.com/files/pdf/drs_performance_best_practices_wp.pdf