同时在所有主机上重新启动计算机

Question

I have an idea about restarting all of host/VMs in my inventory. I created some short script which restarting one by one of hosts. But it's take to long time. How can i do that all hosts to be restarted at the same time?

My code:

foreach ($host in $hosts) {
    Restart-Computer -ComputerName $host -Wait
    Write-Host "$host restarted "
}

Answer 1

Restart-Computer will accept multiple entries for ComputerName so you can perform the restart on more than one host at a time.

Using this you can initiate the restart in batches, say three at a time, this will significantly decrease the time it takes without adding too much load on the VM Cluster/Host.

$hosts = @("server01","server02","server03","server04","server05","server06","server07","server08","server09","server10")

[int]$batches = 3 #number of computers to restart in each 'batch'
[int]$skip = 0

do {
    $selected_hosts = $hosts | Select-Object -First $batches -Skip $skip

    Restart-Computer -ComputerName $selected_hosts -Wait -WhatIf
    Write-Host "$selected_hosts restarted"

    $skip = $skip + $batches
}
while ($selected_hosts)

Note: Remove -WhatIf when you're ready to run the script live, with this in place Restart-Computer will just write to Console informing you what it would do and not actually performing the restart.

Answer 2

is it a good idea ?? - Restart-Computer -asJob Or maybe are better solutions ??

$j = Restart-Computer -ComputerName "Server01", "Server02" -AsJob
PS C:\> $Results = $j | Receive-Job
PS C:\> $Results

Answer 3

Can you try WMI to reboot the servers. I found one such method on social.technet.microsoft Forum.

$server = get-content c:\Servers.txt

(gwmi -Class Win32_OperatingSystem -ComputerName $server).Win32Shutdown(6)
If ($?) {
Write-Host "$server successfully rebooted"
}Else{
Write-Host "Could not reboot $server"
}

You can find other methods also like using a batch file. Check out this link.