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fix: better error message in windows CSE when API server can't be contacted #7828

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fix: better error message in windows CSE when API server can't be contacted #7828

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d426ca1
better error
timmy-wright Feb 9, 2026
c55fcd3
log to event
timmy-wright Feb 9, 2026
d1b6d85
better last exception
timmy-wright Feb 9, 2026
da4cc14
Update staging/cse/windows/kubernetesfunc.ps1
timmy-wright Feb 10, 2026
2866611
pr feedback
timmy-wright Feb 13, 2026
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12 changes: 9 additions & 3 deletions staging/cse/windows/kubernetesfunc.ps1
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Original file line number Diff line number Diff line change
Expand Up @@ -182,6 +182,7 @@ function Check-APIServerConnectivity {
)
Logs-To-Event -TaskName "AKS.WindowsCSE.CheckAPIServerConnectivity" -TaskMessage "Start to check API server connectivity."
$retryCount=0
$lastExceptionMessage=$null

do {
$retryString="${retryCount}/${MaxRetryCount}"
Expand All @@ -201,17 +202,22 @@ function Check-APIServerConnectivity {
}
$tcpClient.Close()
} catch [System.AggregateException] {
Write-Log "Retry ${retryString}: Failed to connect to API server $MasterIP. AggregateException: " + $_.Exception.ToString()
Logs-To-Event -TaskName "AKS.WindowsCSE.CheckAPIServerConnectivity" -TaskMessage "Retry ${retryString}: Failed to connect to API server $MasterIP. AggregateException: " + $_.Exception.ToString()
$lastExceptionMessage = $_.Exception.ToString()
} catch {
Write-Log "Retry ${retryString}: Failed to connect to API server $MasterIP. Error: $_"
Logs-To-Event -TaskName "AKS.WindowsCSE.CheckAPIServerConnectivity" -TaskMessage "Retry ${retryString}: Failed to connect to API server $MasterIP. Error: $_"
$lastExceptionMessage = "$_"
}

$retryCount++
Write-Log "Retry ${retryString}: Sleep $RetryInterval and then retry to connect to API server"
Sleep $RetryInterval
} while ($retryCount -lt $MaxRetryCount)

Set-ExitCode -ExitCode $global:WINDOWS_CSE_ERROR_CHECK_API_SERVER_CONNECTIVITY -ErrorMessage "Failed to connect to API server $MasterIP after $retryCount retries"
# Normalize any CR/LF in the exception message to spaces to keep ErrorMessage single-line.
$lastExceptionMessage = $lastExceptionMessage -replace "(`r|`n)+", " "

Set-ExitCode -ExitCode $global:WINDOWS_CSE_ERROR_CHECK_API_SERVER_CONNECTIVITY -ErrorMessage "Failed to connect to API server $MasterIP after $retryCount retries. Last exception: $lastExceptionMessage"
}

function Get-CACertificates {
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