# verifyIPLinux.ps1
# Deploy to: C:\CLISave\AssignIP\verifyIPLinux.ps1 on the vSphere Windows host
#
# Usage: powershell -ExecutionPolicy Bypass -NonInteractive -File verifyIPLinux.ps1 \
#            <vm_id> <ip> <vcenter_host> <vcenter_user> <vcenter_password> <guest_password>
#
# Checks that the IP is configured and the interface is UP inside the Linux guest.
# Output: SUCCESS | FAIL  (exactly one line)

param(
    [Parameter(Mandatory=$true)][string]$VmId,
    [Parameter(Mandatory=$true)][string]$Ip,
    [Parameter(Mandatory=$true)][string]$VCenterHost,
    [Parameter(Mandatory=$true)][string]$VCenterUser,
    [Parameter(Mandatory=$true)][string]$VCenterPassword,
    [Parameter(Mandatory=$true)][string]$GuestPassword
)

Set-StrictMode -Version Latest
$ErrorActionPreference = "Stop"

try {
    Import-Module VMware.VimAutomation.Core -ErrorAction Stop
    Set-PowerCLIConfiguration -InvalidCertificateAction Ignore -Confirm:$false | Out-Null
    Set-PowerCLIConfiguration -Scope User -ParticipateInCEIP $false -Confirm:$false | Out-Null

    Connect-VIServer -Server $VCenterHost -User $VCenterUser -Password $VCenterPassword -Force -ErrorAction Stop | Out-Null

    $vm = Get-VM -Id "VirtualMachine-$VmId" -ErrorAction Stop

    # Bash snippet: verify IP exists on an active (UP) interface
    $verifyScript = @"
#!/bin/bash
# Check the IP appears in 'ip a' output on an interface that is UP (state UP)
if ip a | grep -q '$Ip'; then
    IFACE=`$(ip -o addr show | awk '/$Ip/{print `$2}' | head -1)
    STATE=`$(cat /sys/class/net/`$IFACE/operstate 2>/dev/null || echo 'unknown')
    if [ "`$STATE" = "up" ] || [ "`$STATE" = "unknown" ]; then
        echo SUCCESS
        exit 0
    fi
fi
echo FAIL
exit 1
"@

    $result = Invoke-VMScript -VM $vm `
        -ScriptText $verifyScript `
        -GuestUser "root" `
        -GuestPassword $GuestPassword `
        -ScriptType Bash `
        -ErrorAction Stop

    if ($result.ScriptOutput -match "SUCCESS") {
        Write-Output "SUCCESS"
    } else {
        Write-Output "FAIL"
    }
} catch {
    Write-Output "FAIL"
} finally {
    Disconnect-VIServer -Confirm:$false -ErrorAction SilentlyContinue | Out-Null
}