Set-AzAksCluster upgrade AKS Cluster - azure-aks

Question

Trying to get/print the current version of Aks cluster and checking which Kubernetes upgrade releases are available in the region where my AKS cluster resides and upgrading my AKS cluster. Below is my script where unable to upgrade from 1.23.12 to 1.24.3,hence its going to downgrading version(1.23.8). Hope you can assist me with a problem trying to execute a script block. Thanks in Advance
Param
(
[Parameter(Mandatory=$true)]
[String]
$AKSName,
[Parameter(Mandatory=$true)]
[String]
$SubscriptionID
)
Connect-AzAccount -Identity > $null
Set-AzContext -SubscriptionId $SubscriptionID > $null
$AKsResourceGroup= Get-AzResource -Name $AKSName | foreach {$_.ResourceGroupName}
$AKsLocation= Get-AzResource -Name $AKSName | foreach {$_.Location}
#Check Current Version Of Cluster
$CurrentVersion = Get-AzAksCluster -ResourceGroupName $AKsResourceGroup -Name $AKSName | select -ExpandProperty KubernetesVersion -WarningAction Ignore #> $null
"The CurrentVersion is $CurrentVersion" | ConvertTo-Json
#Check the availability versions to upgrade
$Versions = Get-AzAksVersion -Location $AKsLocation | where-Object {($_.OrchestratorVersion -gt $CurrentVersion) -and ($_.IsPreview -ne 'True')} | foreach {$_.OrchestratorVersion} -WarningAction Ignore
"These are the available versions $Versions" | ConvertTo-Json
$attempt3 =$versions.Replace(' ', ' , ')
$attempt3=$attempt3.replace(' " ' , " ")
$attempt3=$attempt3.replace(" ' "," ")
#for upgrading the latest version
$finalversion=$attempt3.Split(",")[0]
#AKS Upgrade
Set-AzAksCluster -ResourceGroupName $AKsResourceGroup -Name $AKSName -KubernetesVersion $finalversion -WarningAction Ignore > $null
#To check the status of AKS
Get-AzAksCluster -ResourceGroupName $AKsResourceGroup -Name $AKSName | Format-Table -Property Name, Location, KubernetesVersion, ProvisioningState
``
output:
"The CurrentVersion is 1.23.12"
"These are the available versions 1.23.8 1.24.3 1.24.6"
**Downgrading Kubernetes version 1.23.12 to 1.23.8 is not allowed. Available upgrades: 1.24.3,1.24.6.**

Answer 1

I tried to upgrade the AKS cluster version in my environment and got the below results
I have followed the below steps to upgrade the AKS cluster version
$RG-name= Get-AzResource -Name $AKSName | foreach {$_.ResourceGroupName}
$AKsLocation= Get-AzResource -Name $AKSName | foreach {$_.Location}
$CurrentVersion = Get-AzAksCluster -ResourceGroupName $RG-name -Name $AKSName | select -ExpandProperty KubernetesVersion -WarningAction Ignore #> $null
"The CurrentVersion is $CurrentVersion" | ConvertTo-Json
To check what are versions available in the cluster
$Version = Get-AzAksVersion -Location $AKsLocation | where-Object {($_.OrchestratorVersion -gt $CurrentVersion) -and ($_.IsPreview -ne 'True')} | foreach {$_.OrchestratorVersion} -WarningAction Ignore
"These are the available versions $Versions" | ConvertTo-Json
To Upgrade the version I have followed the below commands
$final =$version.Replace(' ', ' , ')
$final=$final.replace(' " ' , " ")
$final=$final.replace(" ' "," ")
#for upgrading the latest version
$finalversion=final.Split(",")[1]
#AKS Upgrade
Set-AzAksCluster -ResourceGroupName $RG-name -Name $AKSName -KubernetesVersion $finalversion -WarningAction Ignore > $null
When I check the below command I am able to see the updated version
Get-AzAksCluster -ResourceGroupName $RG-name -Name $AKSName | Format-Table -Property Name, Location, KubernetesVersion, ProvisioningState
Note:
We will get the upgraded version based on the available versions, I have used the split function split[1] because I need the next version of my current version if we need 1.24.6 version we have to use split[2] array function.