With Cloud Relay and the /rest/v1/licenses API endpoint, how does the relay determine which server the licenses is bound to?

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Luke McFadden

• October 26, 2022 03:25

Ideally, I'd like to not specify a licenseBlock, but I'm trying to determine how the relay selects which server it will use for licenses.

For example:

/rest/v1/system/info returns two servers for one system.

    "servers": [

        "{f016e6a3-9ba2-c67d-3c23-654148d74009}",

        "{355614c2-40e3-acc2-6136-cea6a53bc1c9}"

    ]

 

How can I determine which server will be used?

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  Andrey Terentyev

  • October 27, 2022 18:36

  Hi,

  how the relay selects which server it will use for licenses.

  Relay does not select, it just forwards requests to a Server in the system.

  How can I determine which server will be used?

  The licenseBlock stores HWID, which can be searched in what the /ec2/getHardwareIdsOfServers returns.

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  Luke McFadden

  • October 27, 2022 18:54

   it just forwards requests to a Server in the system.

  So in a 5 server system, how is it deciding?  Randomly?  Or in some order?  The request without a licenseBlock is still binding to a hardwareId.

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  Andrey Terentyev

  • November 02, 2022 12:37
  • Edited

  hi,

  Here is what I figured out, but have not tested.

  If you want to send an API call to a certain server you should add a special header to your HTTP request:

  X-server-guid: <server_id>

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  Luke McFadden

  • November 02, 2022 15:17

  Thanks Andrey Terentyev

  In testing, this is working.  It returns a 503 if the server is offline it seems.  

  Related, is there currently any /cdb/ endpoint that will return the server ID's for a system?  I know I can use the relay call to /rest/v1/servers, but curious if I could pull server ID's from the cloud.

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  Andrey Terentyev

  • November 02, 2022 16:03

  Hi,

  Related, is there currently any /cdb/ endpoint that will return the server ID's for a system?

  No, there is none of it.

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