[Starlingx-discuss] multi-node AIO / PXE booting

Outback Dingo outbackdingo at gmail.com
Tue May 10 12:20:42 UTC 2022

On Tue, May 10, 2022 at 6:48 PM Pratik M. <pvmpublic at gmail.com> wrote:
> On Mon, May 9, 2022 at 4:01 PM Outback Dingo <outbackdingo at gmail.com> wrote:
> > can i deploy a duplex aio on 2-3 nodes? and worker/storage on 4 nodes
> Duplex AIO = Controller (and storage and workers) on 2 nodes. There is no 3-controller option in StarlingX. So typically you would get 2 controllers and 6 workers. Pl. see:
> https://docs.starlingx.io/deploy/index-deploy-da06a98b83b1.html

according to this document

Standard with Storage Cluster on Controller Nodes
A two node HA controller + storage node cluster, managing up to 200
worker nodes.

Standard with Storage Cluster on dedicated Storage Nodes
A two node HA controller node cluster with a 2-9 node Ceph storage
cluster, managing up to 200 worker nodes.

which basically says i cant even put storage on compute/worker nodes

> > so questions:
> > 1) can i boot all nodes from pxe server?
> In the standard/typical deployment, only controller-0 is PXE booted from an "external" PXE server. Other hosts PXE boot off the controller-0 on the cluster-internal mgmt/cluster network. The second link you refer to, is about PXE booting the controller-0.
> But, the first link you refer to, allows PXE booting ALL nodes from an external network. I haven't tried this but it seems supported. For e.g.
> https://docs.starlingx.io/developer_resources/stx_ipv6_deployment.html
> > 2) after booting installing the controller-0 node i can then pxe boot
> > install controller-1 node
> > 3) in this scenerio how does controller-0 discover controller-1 so i
> > can set the host  "system host-update 2 personality=controller"
> In the typical deployment, once controller-0 is up, it runs a DHCP and TFTP server on the internal mgmt/cluster network. The controller-1 and other worker nodes are supposed to be configured to network boot off the NIC connected to this internal network. When they boot, controller-0 will "discover" them and add them to the host inventory.
> https://docs.starlingx.io/planning/kubernetes/starlingx-boot-sequence-considerations.html
> https://docs.starlingx.io/planning/kubernetes/internal-management-network-planning.html#internal-management-network-planning
> > 4) does the same apply to workers
> Yes
> >
> > 5) if you have 6 fully configured server each with 24TB and 512Gb
> > memory, how would you deploy to get a full 6 nodes with storage and
> > compute?
> You want more storage than controllers can provide? Pl see if this helps:
> https://docs.starlingx.io/planning/kubernetes/storage-planning-storage-resources.html
> Thanks

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