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The_Y's avatar
The_Y
Icon for Cirrus rankCirrus
Mar 28, 2017

iControl Rest Add Vlans to VCMP guest

Hello All,

 

I have been working automating some of our L2 and L3 tasks and running into a an issue where I am unable to add the created vlans to VCMP Guest. I am using powershell to do that. My understanding is that because the vlans properties in the VCMP guest is not a sub-collection in the guest object then we'll have to query the vlans into a variable, add the new vlans to that variable and add that back to the guest

 

Get vlans current vlans from Guest 
$GuestVlans = Invoke-RestMethod "https://BigIPMgmtIP/mgmt/tm/vcmp/guest/GuestName" -Credential $creds -Method GET -ContentType application/json | select -ExpandProperty vlans``

Add new vlans to $GuestVlans
$GuestVlans += "Common/Newvlan1"
$GuestVlans += "Common/Newvlan2"

Invoke-RestMethod "https://BigIPMgmtIP/mgmt/tm/vcmp/guest/GuestName" -Credential $creds -Method PATCH -ContentType application/json -Body $GuestVlans

Add the vlans back seems not be working and I am getting the following error

Invoke-RestMethod : {"code":400,"message":"Found invalid JSON body in the request.","errorStack":[]}

I am new to this and trying to learn as much as I can so any of your help will be very welcomed.

 

Thank you

 

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  • connors_233630's avatar
    connors_233630
    Historic F5 Account
    Apr 06, 2017

    It looks like you are attempting to patch the contents of the vlans property, when the rest method expects a vcmp guest object. I think you need to stick $GuestVlans back into a guest-like object like (pseudocode) 

    {"vlans":$GuestVlans}
    , and that may do the trick.

    I'm also not certain about the way you are adding vlans, which looks like it will just result in one long string 

    "Common/OriginalVlanCommon/NewVlan1Common/NewVlan2"
    , but I'm not familiar enough with these powershell commands to be certain.

    • The_Y's avatar
      The_Y
      Icon for Cirrus rankCirrus
      Apr 07, 2017

      Good call. I 'll definitely give it a try. Thanks for the answer

       

  • Greg_Jewett's avatar
    Greg_Jewett
    Icon for Cirrus rankCirrus
    May 16, 2019

    All..

    If you are dumbfounded with the error "", then you are not alone. I just spent the last couple of days yelling at my computer and the F5 API.

     

    If you are using "Requests: HTTP for Humans" (https://2.python-requests.org/en/master/) module/library within Python to perform http requests to the API, and you are sending JSON objects as part of the data, then they must use the syntax:

    NOT:

    Example:

    Perform a "Config-Sync" with the API, and using "data=postData" you will receive

    {u'errorStack': [], u'message': u'Found invalid JSON body in the request.', u'code': 400, u'apiError': 1}

     

    Changing that to "json=postData", removes the error as it properly encodes the json data into the request.

    Hope this helps!