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  1. OpenShift Virtualization
  2. CNV-49918

[Abandoned] Source-load balancing for overlay networks

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    • Resolution: Won't Do
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    • CNV Network
    • balance-slb-overlay
    • 77
    • Hide
      • Active-active bonding can be configured without a need to configure physical switch (enable EtherChannel)
      • This bonding is equally balancing traffic originating from different VMs connected through an overlay network managed by OVN Kubernetes
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      Active-active bonding can be configured without a need to configure physical switch (enable EtherChannel) This bonding is equally balancing traffic originating from different VMs connected through an overlay network managed by OVN Kubernetes
    • To Do

      Abandoned

      After writing this, I don't think there is a usecase for it. The reason to always send VM's traffic from the same port is that if we did not do that, the physical switch would be confused about whereabouts of the VM. In case of overlay, the VM traffic is not visible to the switch, so there is nothing to be confused about.

      The real motivation for port-based-hash seems to be performance of hash calculation.

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      Goal

      Support active-active bonding without a need to configure physical switches, while evenly balancing network overlay traffic.

      User Stories

      • As an admin, configuring bonding in active-active mode, unable to reconfigure physical switch, supporting infrastructure for many VMs connected through overlay networks,
        I want traffic of these VMs to be spread equally within the ports of the bonding.

      Non-Requirements

      • <List of things not included in this epic, to alleviate any doubt raised during the grooming process.>

      Notes

      • Customers coming from VMware are used to having bond active-active bond modes that do not require switch-side configuration:
      • With basic bridge+VLAN networking, the two modes described above produce the same result. However, when overlay networking is used, all the traffic is tunneled from br-ex, and so MAC+VLAN hashing is not a good fit.

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          upstream roadmap issue Sub-task New Normal Unassigned
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          downstream documentation merged Sub-task New Normal Unassigned

              Unassigned Unassigned
              phoracek@redhat.com Petr Horacek
              Nir Rozen Nir Rozen
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                Created:
                Updated:
                Resolved: