Forum Discussion

Julio_Navarro's avatar
Julio_Navarro
Icon for Cirrostratus rankCirrostratus
Jul 18, 2019
Solved

Using an asynchronous task | Creating UCS File

Hi,

I am trying the following REST URL to create a task to generate a UCS File:

Method: Post
URI: mgmt/tm/task/sys/ucs/
Body: { "command": "save",    "name": "UCS01" }

So, I get back:

{
  "_taskId": 1563464422689504,
  "_taskState": "STARTED",
  "_taskTimeInStateMs": 0,
  "_taskResultLink": "https://localhost/mgmt/tm/task/sys/ucs/1563464422689504/result?ver=12.1.3.4",
  "selfLink": "https://localhost/mgmt/tm/task/sys/ucs/1563464422689504?ver=12.1.3.4"
}

Now, when I do check the status:

Method: Get
URI: /mgmt/tm/task/sys/ucs/1563464422689504

I gel back:

{
  "selfLink": "https://localhost/mgmt/tm/task/sys/ucs/1563464422689504?ver=12.1.3.4",
  "_taskId": 1563464422689504,
  "_taskState": "COMPLETED",
  "_taskTimeInStateMs": 5000,
  "_taskResultLink": "https://localhost/mgmt/tm/task/sys/ucs/1563464422689504/result?ver=12.1.3.4"
}

When I go to /var/local/ucs, I don't see the UCS created.

** Maybe I am missing something. Please advise **

----------- If I don't use the "task" option, then it will worked. But I would like to use the task option to take advantage of asynchronous tasks ----

Thank you

  •  ; to close the loop on this one, it appears that you the part that was missing in your request is the -X PUT request, to set the state to 'VALIDATING'

     

    # curl -k -u admin:admin -H 'Content-Type: application/json' -X PUT -d '{"_taskState":"VALIDATING"}' https://localhost/mgmt/tm/task/sys/ucs/1563478591515657?ver=12.1.3.4
    {
        "code":202,
        "message":"Task will execute asynchronously.",
        "errorStack":[]
    }

    That is the request which is necessary to cause any task to begin processing. Until then, the task is waiting for any number of additional tasks to be added together.

6 Replies

  • Hi,

    Tested on v15.0.0 looks OK for me.

    What BIG-IP version are you trying to?

    curl -k -u admin:admin  -X POST -H 'Content-Type: application/json'  -d '{ "command": "save", "name": "UCS01" }' https://localhost/mgmt/tm/task/sys/ucs
     
    {
      "_taskId": 1563470408202544,
      "_taskState": "STARTED",
      "_taskTimeInStateMs": 0,
      "_taskResultLink": "https://localhost/mgmt/tm/task/sys/ucs/1563470408202544/result?ver=15.0.0",
      "selfLink": "https://localhost/mgmt/tm/task/sys/ucs/1563470408202544?ver=15.0.0"
    }
    curl -k -u admin:admin -H 'Content-Type: application/json' -X PUT -d '{"_taskState":"VALIDATING"}' https://localhost/mgmt/tm/task/sys/ucs/1563470408202544
     
    {
      "code": 202,
      "message": "Task will execute asynchronously.",
      "errorStack": []
    }
    curl -k -u admin:admin  https://localhost/mgmt/tm/task/sys/ucs/1563470408202544
     
    {
      "selfLink": "https://localhost/mgmt/tm/task/sys/ucs/1563470408202544?ver=15.0.0",
      "_taskId": 1563470408202544,
      "_taskState": "COMPLETED",
      "_taskTimeInStateMs": 13000,
      "_taskResultLink": "https://localhost/mgmt/tm/task/sys/ucs/1563470408202544/result?ver=15.0.0"
    }
    # ls -la /var/local/ucs
    total 484520
    drwxr-xr-x. 3 root root      4096 Jul 18 14:29 .
    drwxr-xr-x. 9 root root      4096 Jun 28 12:23 ..
    -rw-r--r--. 1 root root 195341011 Jun 28 12:23 config.ucs
    -r--r--r--. 1 root root       114 May 10 05:57 cs_backup_rotate.conf
    drwxr-xr-x. 2 root root      4096 Jun 28 12:43 tmp
    -rw-r--r--. 1 root root 300789664 Jul 18 14:15 UCS01.ucs
     

     

     

     

      • cjunior's avatar
        cjunior
        Icon for Nacreous rankNacreous

        Buddy, It works for me on v12.1.3.4.

        # curl -k -u admin:admin  -X POST -H 'Content-Type: application/json'  -d '{ "command": "save", "name": "UCS01" }' https://localhost/mgmt/tm/task/sys/ucs
        {
            "_taskId":1563478591515657,
            "_taskState":"STARTED",
            "_taskTimeInStateMs":0,
            "_taskResultLink":"https://localhost/mgmt/tm/task/sys/ucs/1563478591515657/result?ver=12.1.3.4",
            "selfLink":"https://localhost/mgmt/tm/task/sys/ucs/1563478591515657?ver=12.1.3.4"
        }
         
        # curl -k -u admin:admin -H 'Content-Type: application/json' -X PUT -d '{"_taskState":"VALIDATING"}' https://localhost/mgmt/tm/task/sys/ucs/1563478591515657?ver=12.1.3.4
        {
            "code":202,
            "message":"Task will execute asynchronously.",
            "errorStack":[]
        }
         
        # curl -k -u admin:admin  https://localhost/mgmt/tm/task/sys/ucs/1563478591515657?ver=12.1.3.4
        {
            "selfLink":"https://localhost/mgmt/tm/task/sys/ucs/1563478591515657?ver=12.1.3.4",
            "_taskId":1563478591515657,
            "_taskState":"COMPLETED",
            "_taskTimeInStateMs":10000,
            "_taskResultLink":"https://localhost/mgmt/tm/task/sys/ucs/1563478591515657/result?ver=12.1.3.4"
        }
         
         
        # ls -la /var/local/ucs
        total 3976
        drwxr-xr-x. 3 root root    4096 2019-07-18 12:37 .
        drwxr-xr-x. 9 root root    4096 2019-07-18 12:20 ..
        -r--r--r--. 1 root root     114 2018-04-10 13:52 cs_backup_rotate.conf
        drwxr-xr-x. 2 root root    4096 2019-07-18 12:22 tmp
        -rw-r--r--. 1 root root 4049809 2019-07-18 12:37 UCS01.ucs

        So, if you can save UCS from another way, we can't confirm issues during save the file.

        It sounds strange to me ğŸ˜ž

  •  ; to close the loop on this one, it appears that you the part that was missing in your request is the -X PUT request, to set the state to 'VALIDATING'

     

    # curl -k -u admin:admin -H 'Content-Type: application/json' -X PUT -d '{"_taskState":"VALIDATING"}' https://localhost/mgmt/tm/task/sys/ucs/1563478591515657?ver=12.1.3.4
    {
        "code":202,
        "message":"Task will execute asynchronously.",
        "errorStack":[]
    }

    That is the request which is necessary to cause any task to begin processing. Until then, the task is waiting for any number of additional tasks to be added together.

    • Roman_Melekh's avatar
      Roman_Melekh
      Icon for Altocumulus rankAltocumulus

      Hello

      It looks like I need somebody's help to determine what could be wrong with my script.

      I am re-writing all the logic using PowerShell, but the idea is the same - to create a task, to start the task, to check if the task state is COMPLETED and then to download the result.

      Here is what I am facing:

      step1, to create a task:

      _taskId            : 1684506387897122
      _taskState         : STARTED
      _taskTimeInStateMs : 0
      _taskResultLink    : https://localhost/mgmt/tm/task/sys/ucs/1684506387897122/result?ver=16.1.3.4
      selfLink           : https://localhost/mgmt/tm/task/sys/ucs/1684506387897122?ver=16.1.3.4

      step2, to start the task

      code       : 202
      message    : Task will execute asynchronously.
      errorStack : {}

      step3, getting status (the request hags for ~30 seconds):

      Invoke-RestMethod : {"code":400,"message":"remoteSender:10.0.3.138, method:GET ","referer":"10.0.3.138","restOperationId":15296221,"kind":":resterrorresponse"}

      If I request status for the 2nd time, I can get (sometimes) task COMPLETED, or I can get a "Task not found" error. My question is why do sometimes tasks disappear?