failover dns

failover_dns.ps1

#run on med7 dc (local)

$zonename = "healthcare.local"
$ip_table = @{
    M7FS = "10.1.100.30";
    M7KDM = "10.1.100.7";
    M7DTS = "10.1.100.6";
    M7KESM = "10.1.100.8";
    TS2 = "10.1.100.37";
    M7APP = "10.1.100.5";
    M7DB = "10.1.100.4"
}

$orig_table = @{
    M7FS = "10.1.1.30";
    M7KDM = "10.1.1.7";
    M7DTS = "10.1.1.6;";
    M7KESM = "10.1.1.8";
    TS2 = "10.1.1.37";
    M7APP = "10.1.1.5";
    M7DB = "10.1.1.4"
}


&"/Users/nshores/Scripts/azure/azure-docs-powershell-samples/azure-migrate/migrate-at-scale-with-site-recovery/asr_testmigration.ps1 -CsvFilePath input_template.csv"


#update
foreach ($key in $ip_table.keys){
    $OldObj = Get-DnsServerResourceRecord -Name $key -ZoneName $zonename
    write-host "Old Object : $($oldobj.hostname) $($oldobj.RecordData.IPv4Address)"
    $NewObj = $OldObj.Clone()
    $newobj.RecordData.IPv4Address = "$($ip_table.$key)"
    write-host "New Object : $($newobj.hostname) $($newobj.RecordData.IPv4Address)"
    Set-DnsServerResourceRecord -NewInputObject $NewObj -OldInputObject $OldObj -ZoneName $zonename -PassThru

}

    #replicate dns
    Invoke-Command -ComputerName "m7-az-dc" -ScriptBlock {
        & 'C:\Windows\System32\repadmin.exe' /syncall
    }

#rollback
foreach ($key in $orig_table.keys){
    $OldObj = Get-DnsServerResourceRecord -Name $key -ZoneName $zonename
    write-host "Old Object : $($oldobj.hostname) $($oldobj.RecordData.IPv4Address)"
    $NewObj = $OldObj.Clone()
    $newobj.RecordData.IPv4Address = "$($ip_table.$key)"
    write-host "New Object : $($newobj.hostname) $($newobj.RecordData.IPv4Address)"
    Set-DnsServerResourceRecord -NewInputObject $NewObj -OldInputObject $OldObj -ZoneName $zonename -PassThru
}


    #replicate dns
    Invoke-Command -ComputerName "m7-az-dc" -ScriptBlock {
        & 'C:\Windows\System32\repadmin.exe' /syncall
    }