XEN Orchestra JSON-RPC automation questions

IvanK

Hello.

We already have VM deploy tool written in powershell 5. And now we need to add there support for XCP-NG.
REST API does not provide neither clone nor methods for change VM properties (but name and description, so I had to use websockets.

But I face several issues:

When I call vm.clone method I can see in corresponding task that it fails with “SR_BACKEND_FAILURE_1200(, Invalid argument, )” error, never mind that sr is not needed for clone. here is reference from our XCP about this method:

"vm.clone": {
  "params": {
    "id": {
      "type": "string"
    },
    "name": {
      "type": "string"
    },
    "full_copy": {
      "type": "boolean"
    }
  }
},

I tried to use parameters with SR or without - does not matter - it didn't work, same as I tried to use parameters like

VM = vm_id
    name_label = "NEW_VM_BY_API"
    name_description = "NEW_VM_BY_API"
    snapshot = "false"
    full_copy = "true"
    sr = sr_id

it also did not help.

What correct parameters should be to run vm.clone method via websocket json_rpc?

I was able sucecssfully call method vm.copy with parameters

$vm_copy = @{
    vm = vm_id
    name = "NEW_VM_BY_API"
    sr = 'sr_id'
}

and it worked, but how can I track process programmaticaly and how it finished?

there're no methods for tasks, but task.cancel or task.destroy. I can query xo.getAllObjects with filter "task", but it returns only pending tasks and just failed ones (and for single copy task there're two tasks in output. very similar) As soon as task completes succesfully - it disappears from getAllObjects. And even if it fails - it also disappeares from there but after some time. Why there're no info about successfully completed tasks? Where can I found those logs?

I can see more failed tasks in REST output in /rest/v0/tasks (no sign of successfull ones either), but I cannot find correspondence between task GUID in json_rpc and task id that some type of base_encode in REST so it is very hard to determine that deploy completed successfully
I can query each failed task in /rest/v0/tasks/GUID in cycles to find mine, but it sounds awful. And if one task failed for the first time and I will do restart - it will find in REST old failed tasks with the same info, so I need to rely on something else. Timestamps?

Not very convenient for sure.

I feel that I am missing something and hope that you can help me automating my deploys on XCP-NG platform using powershell 5.

all methods I have I received using ws call method 'system.getMethodsInfo'

Here powershell code for websocket queries if you like:

function Call-XOJsonRpc
{
    param(
        [string]$uri,
        [string]$username,
        [string]$password,
        [string]$method,
        [hashtable]$parameters = @{}
    )
    $ct = [System.Threading.CancellationToken]::None
    $client = [System.Net.WebSockets.ClientWebSocket]::new()

    try {
        # Connect to WebSocket
        $client.ConnectAsync([System.Uri]$uri, $ct).Wait()
        Write-Host "Connected to XO WebSocket"

        function Send-JsonRpc {
            param (
                [string]$method,
                [hashtable]$params = @{},
                [int]$id
            )

            $json = @{
                jsonrpc = "2.0"
                method  = $method
                params  = $params
                id      = $id
            } | ConvertTo-Json -Depth 5 -Compress

            $bytes = [System.Text.Encoding]::UTF8.GetBytes($json)
            $segment = [System.ArraySegment[byte]]::new($bytes)
            $client.SendAsync($segment, [System.Net.WebSockets.WebSocketMessageType]::Text, $true, $ct).wait()
        }

        function Receive-JsonRpc {
            $buffer = New-Object byte[] 8192
            $segment = [System.ArraySegment[byte]]::new($buffer)
            $textBuilder = New-Object System.Text.StringBuilder

            do {
                $result = $client.ReceiveAsync($segment, $ct).Result
                $chunk = [System.Text.Encoding]::UTF8.GetString($buffer, 0, $result.Count)
                $null = $textBuilder.Append($chunk)
            } while (-not $result.EndOfMessage)

            return $textBuilder.ToString()
        }

        # 2. session.signIn
        Send-JsonRpc -method "session.signIn" -params @{ username = $username; password = $password } -id 1
        $loginResponse = Receive-JsonRpc | ConvertFrom-Json
        if ($loginResponse.error) {
            throw "Login failed: $($loginResponse.error.message)"
        }

        Write-Host "Logged in to XO WebSocket successfully"

        Send-JsonRpc -method $method -id 2 -params $parameters 
        $objResponse = (Receive-JsonRpc).tolower()| ConvertFrom-Json

        return $objResponse

    } catch {
        Write-Error "Error: $_"
    } finally {
        if ($client.State -eq [System.Net.WebSockets.WebSocketState]::Open) {
            
            $result = $client.CloseAsync([System.Net.WebSockets.WebSocketCloseStatus]::Empty, "", $ct)
            Start-Sleep -Seconds 5
            if ($client.State -eq [System.Net.WebSockets.WebSocketState]::Open)
            {
                throw "Cannot close websocket connection"
            }
        }
        $client.Dispose()
    }

}

example

$username = "yourusername"
$password = 'yourpassword'

$task_info = @{
    filter = @{
        type = "task"
    }
}

$result_tasks = Call-XOJsonRpc -uri 'ws://URL/api/' -username $username  -password $password -method "xo.getAllObjects" -parameters $task_info

output like:

($result_tasks.result.PSObject.Properties.Value |ForEach-Object { $_ | ConvertTo-Json -Depth 5 })|ConvertFrom-Json

olivierlambert

Ping @Team-DevOps