...
vim kud/hosting_providers/baremetal/aio.sh
Specifically... specifically, the only change for this guide's dual-node deployment is to add the worker node details to the [all] and [kube-node] groups, as follows:
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vim kud/hosting_providers/vagrant/installer.sh
The ... specifically, the following lines (near the end of the file) can be commented, as such:
...