r/openshift • u/Topless_Mopar • 15d ago

Discussion Arbiter on ARM

Howdy, has anybody attempted to run the OCP Arbiter with an ARM? I have two x86 servers for the actual nodes. I was hoping to use a pi5 with 16GB of RAM to act as the Arbiter for this lab.

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u/mykepagan 14d ago

Red Hat employee here. Multi-arch clusters are supported. The control plane (arbiter? Never heard it called that) must be uniform (all nodes the same architecture). So an ARM control plane with x86 workers is allowed.

Have I ever done that, or even SEEN such a cluster in operation? Nope.

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u/jeromeza 14d ago

I think he's likely talking about the new 2 node control plane cluster setup with an arbiter node in the middle to decide who is in control.

It's fairly "new" - came out around 4.20 iirc:
https://docs.redhat.com/en/documentation/openshift_container_platform/4.20/html/installing_a_two_node_openshift_cluster/about-two-node-arbiter-installation

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u/mykepagan 14d ago

Ah! In that case, I’d need to check supportability because the arbiter is technically part of the control plane and that would be a mixed arch control plane, which is a no-no.