Set Email notificions on vCenter Alarm definitions

One of the task when configuring a vCenter is to setup the alarm notifications. But to configure 268 alarms by hand…. well it is just a scary task when you do it via the gui / webclient.
In short I created this script that you can find on my github.

The full story

Continue reading “Set Email notificions on vCenter Alarm definitions”

Issue 2 – bypassing the fingerprint cache message when using PLINK

This article is part of a series of articles about issues I encountered during implementation of a vSphere stretched cluster based on vSphere 6.7 U1.
You can find the introduction article here

Issue 2

For some configuration settings I need SSH access to the host.  I use plink.exe to execute instructions through the SSH session. One issue, the first time when you connect with plink you get a message about storing the fingerprint ID in the cache. Normally you would accept this when using putty. But now this is going to be a challenge.
On some other blogs I found the solution. You echo the ‘Y’ which results in storing the ID in the cache.
In my code I now  call plink two times. The first time to accept the fingerprint, the second time to execute the command.
Why two times ? Well, I can’t assume that the fingerprint ID is already known.
The first plink instruction is a simple exit, we only want to check if we can logon.

$credential=get-credential
$plink="d:\plink.exe $hostname -l "+ $credential.username + " -pw " + $credential.getnetworkcredential().password
$command="ls"
invoke-expression ("echo Y | " + $plink +  " -ssh exit")
invoke-expression ($plink + " "+ $command)

Issue 1 – changing root password

This article is part of a series of articles about issues I encountered during implementation of a vSphere stretched cluster based on vSphere 6.7 U1.
You can find the introduction article here

Issue

All the hosts are delivered with 6.5 U2 pre-installed, and they have their own root password. For the implementation we want to have just one general root account password. So after adding all the hosts to the cluster I want to change the root password with powercli. But I tripped over a bug in get-esxcli (thanks to this thread ). The ‘&’ character is not correctly being interpreted when using get-esxli.
The script I wrote checks if the new password contains that character and will kindly ask to change it. After succesfull validation of the password it will apply it to all selected esxi hosts.
I

#-- select one or more hosts
[array]$esxiHosts=get-vmhost | select name | sort | out-gridview -Title "Select one or more ESXi Hosts"-OutputMode Multiple
if ($esxiHosts.count -eq 0) {
write-host "No host(s) selected, will exit." -foregroundcolor yellow
exit
}
#-- ask for root password and validate it agains known bug
Do {
$newCredential = Get-Credential -Username root -Message "Enter the password for the ESXi root account."
$isValid=$true
if ($newCredential.getNetworkCredential().Password -imatch "[\&]") {
$isValid=$false
write-host"Password contains character & which get-esxcli can't handle (bug)..... please consider a different password." -foregroundcolor yellow
}
}
until ($isValid)

#-- change root password for all selected esxi hosts
foreach ($esxiHost in $esxiHosts) {
$esxiHost=get-vmhost -Name -$esxiHost.name
$esxiCli=get-esxcli -v2 -vmhost $esxiHost
$arguments=$esxcli.system.account.set.createArgs()
$arguments.id=$newCredential.UserName
$arguments.password=$newCredential.GetNetworkCredential().password
$arguments.passwordconfirmation=$arguments.password
try {$esxcli.system.account.set.Invoke($arguments)}
catch{write-host "Setting password failed for " $esxiHost.name -ForegroundColor Yellow}
}

Issues I encountered with a stretched cluster implementation on 6.7 U1

At the moment I’m busy with a stretched cluster implementation based on vSphere 6.7 U1. Most of the configuration is straight forward. But I encounter some snags.
So this post is about these snags, and how I solved them.

For configuring 16 hosts I use a lot of powerCLI. Why ? Well I have some issues with host profiles, and not the time (yet) to figure out what is going on.
Edit: I found out what the issue is, I’ll explain it in Issue 3.

I encountered the following issues

Powershell script template

To make live a bit easier when writing powershell scripts, it is a good idea to have some kind of a script template.

Why ?

By using a template you don’t have to worry about the standard stuff you always put in a script. And you can also have some customs functions already available. It is a good starting point for writing the script you want.
And it helps you to standardize you scripting. Which makes it in the end easier to maintain etc… Continue reading “Powershell script template”

import-PowerCLI

For my work I use PowerCLI a lot, but I don’t like the shell that is available when installing PowerCLI. I just want to start PowerShell (mostly through PowerShell ISE) and load with one command the PowerCLI modules and/or snapins and not be limited.

Before PowerCLI 6.5, PowerCLI was a mix of powershell snappins and modules. To support older PowerCLI versions, the script will check if there are vmware powershell snappins registered. And will load them.
Powershell modules will have precedence over the snappins. Continue reading “import-PowerCLI”