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jgroen_43244's avatar
jgroen_43244
Icon for Nimbostratus rankNimbostratus
Sep 27, 2013
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How to create a new node and it add it to a pool as disabled.

I am trying to create a new node and add it to a pool as disabled. Currently, I cannot find anything in the API that will allow me to do that.

 

I can create and add it as enabled using LocalLB::Pool.add_member_v2, and then disable it right after that, but I don't want it to ever be enabled.

 

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iControl
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  • travis_94010's avatar
    travis_94010
    Oct 01, 2013

    It sounds like you're running into an issue with your node names. I'm guessing your error is that the address specified already matches an existing node?

    When a node is created with

    LocalLB::Pool::add_member_v2()

    The name of the created node (if it doesn't already exist) is the same as the IP address you gave it.

    So when you create the node with

    LocalLB::NodeAddressV2::create()

    Just pass the IP address as the name as well. That way, you can create it, disable it with

    LocalLB::NodeAddressV2::set_session_enabled_state

    as stated by the others, and then add it to the pool you want. You won't run into the issue I'm guessing you have. The last call will match the specified AddressPorts to the existing nodes.

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  • mhite_60883's avatar
    mhite_60883
    Icon for Cirrocumulus rankCirrocumulus
    Sep 27, 2013

    It's a tricky one. I would say to just ensure the host fails health check, but even if the host would fail health check, there is a period of time before it gets marked as down. In the small window, traffic is sent to the node.

     

    Will be interested to hear what suggestion other folks have.

     

  • StephanManthey's avatar
    StephanManthey
    Icon for MVP rankMVP
    Sep 27, 2013
    modify ltm pool pool_web members add { 10.131.131.105:80 { session user-disabled state user-down } }
  • StephanManthey's avatar
    StephanManthey
    Icon for MVP rankMVP
    Sep 27, 2013

    Yes, it´s tmsh. I´ve never touched iControl by now, sorry for ignoring the tags to your request.

    How about crafting a node (parent object to pool member) first, marking it as state down: 

    LocalLB::NodeAddressV2::set_session_enabled_state

    And create the poolmember afterwards. It´s a workaround as I don´t see a method in the API to define options during poolmember definition.

  • travis_94010's avatar
    travis_94010
    Icon for Nimbostratus rankNimbostratus
    Oct 01, 2013

    It sounds like you're running into an issue with your node names. I'm guessing your error is that the address specified already matches an existing node?

    When a node is created with

    LocalLB::Pool::add_member_v2()

    The name of the created node (if it doesn't already exist) is the same as the IP address you gave it.

    So when you create the node with

    LocalLB::NodeAddressV2::create()

    Just pass the IP address as the name as well. That way, you can create it, disable it with

    LocalLB::NodeAddressV2::set_session_enabled_state

    as stated by the others, and then add it to the pool you want. You won't run into the issue I'm guessing you have. The last call will match the specified AddressPorts to the existing nodes.