This is a quick blog post on rebooting ESXi hosts in a cluster by migrating VMs off the hosts, putting the host into maintenance mode, rebooting the hosts, checking host is up, then removing the host from maintenance mode and looping through the same process again for all the hosts in the given cluster. There are many scenarios this task can be handy for example keeping up with regular reboot cycle on a scheduled task, adding or removing storage from the hosts, changing a setting for all hosts in the cluster, applying driver settings etc.…
This loops through all hosts in the cluster and below is the script block
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 | Param([Parameter(Mandatory=$true,ValueFromPipeline=$true)][string[]]$Cluster)$ClusterName = "*$Cluster*"## Start-TranscriptStart-Transcript -Path C:\Temp\hostreboot-transcript.txt## Set Connection String$cred = Get-Credential$vCenters = "lab-vc01.lab.local", "lab-vc02.lab.local"Connect-VIServer -Server $vCenters -Credential $cred## Set Parameters## Param([Parameter(Mandatory=$true,ValueFromPipeline=$true)][string[]]$Cluster)## Param([Parameter(Mandatory=$true)][String]$Cluster)Get-Cluster $ClusterNameif((Get-Cluster $ClusterName).count -gt 1){Write-Host "Please Specify Less Than 1 Cluster"## if the cluster name specified matches more than 1 cluster, the operation will be abortedexit}else { write host "$ClusterName is not more than 1 Cluster"}## Grab host lists and save in txt file - make sure you have enough permission to write into dir(Get-Cluster $ClusterName |Get-VMHost).Name | Out-File C:\lab\LabHostReboot.txt cd c:\lab\Get-Content .\LabHostReboot.txt | %{ $Server = $_; Write-Host -ForegroundColor Green "$Server" Write-Host -ForegroundColor Yellow "`tServer Is Entering Maintenance Mode" Set-VMHost $Server -State maintenance -Evacuate | Out-Null Write-Host -ForegroundColor Yellow -NoNewline "`tServer is Rebooting" Restart-VMHost $Server -Confirm:$false | Out-Null ## Wait 5 mins from reboot to check connection state of the Host do { sleep 2 $ServerState = (Get-VMHost $Server).ConnectionState Write-Host -ForegroundColor Yellow -NoNewline "." } while ($ServerState -ne "NotResponding") Write-Host -ForegroundColor Yellow -NoNewline "(Server is powered down)" ## Another 5 mins wait post reboot to make sure server is up and in MM do { sleep 2 $ServerState = (Get-VMHost $Server).ConnectionState Write-Host -ForegroundColor Yellow -NoNewline "`." } while ($ServerState -ne "Maintenance") Write-Host -ForegroundColor Yellow "(Server is Powered Up)" ## Set connection state to connected post reboot Write-Host -ForegroundColor Yellow "`tServer Exiting Maintenance Mode" Set-VMHost $Server -State Connected | Out-Null Write-Host -ForegroundColor Yellow "`tHost Reboot Cycle Done!" Write-Host ""}Stop-Transcript |
Good script. Was looking to do this very thing this morning and this is exactly what I was trying to do.
I am glad you found it useful. Enjoy and share the love to the community