6 Replies Latest reply: Sep 25, 2013 11:41 PM by jiangong RSS

How can I convert a single-node cluster to an HA pair cluster?

jiangong NetApp Employee Novice
Currently Being Moderated

Hi, all

I configured a single-node cluster simulator the other day, but now I want to convert it to an HA pair cluster by joining another node, could someone tell me how?

I have searched some documents, but could not find related doc.

And if it is supported with physical nodes?

  • Re: How can I convert a single-node cluster to an HA pair cluster?
    venkat3 NetApp Employee Cyclist
    Currently Being Moderated

    Hi JianGong Dai,

     

    HA is not supported in simulators

     

    >And if it is supported with physical nodes?

    HA is supported on physical nodes

     

    please see the documentation here -- http://support.netapp.com/knowledge/docs/simulate_ontap/Simulate_ONTAP_8.2_Installation_and_Setup_Guide.pdf

     

    check page 6

     

    -Srinivas

    • Re: How can I convert a single-node cluster to an HA pair cluster?
      jiangong NetApp Employee Novice
      Currently Being Moderated

      Hi, Venkat

      Thank you for your response.

      I know simulator doesn't support HA features, but my point is that how can I convert a single-node cluster to be part of an HA pair cluster with physical node?

      Is there any documentation covering this?

      I searched the KB, but could not find something related.

      • Re: How can I convert a single-node cluster to an HA pair cluster?
        venkat3 NetApp Employee Cyclist
        Currently Being Moderated

        Hi JianGong Dai,

         

        >how can I convert a single-node cluster to be part of an HA pair cluster with physical node?

        >Is there any documentation covering this?

        >I searched the KB, but could not find something related.

         

        i am curious to know the usecase here.

         

         

        >can I convert a single-node cluster to be part of an HA pair cluster with physical node?

        This is not supported either.(actually not possible to do )

         

        In a HA pair need to see the disk-shelf of there partners

        For example. say i have a physical HA pairs A and B.Each of these nodes when part of HA can view partner disks (they are cabled such that)

        In an event of failure of controller A the partner B takeover all the disks of partner A

         

        Since in a simulator (simulated ontap) we don't have an ability to achieve this . i say this is not supported

        so you cannot pair a vsim with physical node to create an HA

         

         

        -Srinivas

        • Re: How can I convert a single-node cluster to an HA pair cluster?
          jiangong NetApp Employee Novice
          Currently Being Moderated

          Hi, Venkat

          Many thanks in advance for your comments.

          I am sorry I didn't make myself understood correctly, but I certainly know we cannot pair a vsim with a physical node to create an HA.

          Now let me make it clearly: assume that I got a FAS2240A, and I use one controller to create a single-node cluster, and just leave the other controller not configured(but with 8.2 cDOT image installed). Now I want to convert the single-node cluster to pair the unused controller to create an HA pair cluster. what is the specific conversion processes?

          Thank you.

          • Re: How can I convert a single-node cluster to an HA pair cluster?
            venkat3 NetApp Employee Cyclist
            Currently Being Moderated

            Hi JianGong Dai,

             

            I guess you incorrectly posted it to SIMULATOR page. But thats ok.

            This question is more on the physical ontap front.

            Aah i read the subject line -- which clearly states your point.

             

            well i will try and answer this one.(though i may be incorrect -- request you to check and post a similar query on ontap community page)

            also i would try and find an answer myself because this looks like an interesting scenario too

             

            my answer:

            If you buy two physical nodes i would ideally configure both (will not try to have a single node)

            Since you have tried to create a single node cluster only . I would ideally bring up the second node with same ontap version

            I will have to connect the disk shelf appropriately for HA (as mentioned in my above post)

            I would need an interconnect cable running between these clusters nodes

             

            i will make the second node up and join the first node (making it a 2 node cluster)

            after this on for HA i will have to enable storage failover on each nodes

             

            storage failover modify -node nodeA -enabled true

            storage failover modify -node nodeB -enabled true.

            storage failover show (would show me both nodes connected)

             

            -Srinivas

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