= persica cluster =

This is a cluster of three identical nodes, named `persica1/2/3`

 * Alma Linux 9.1 x64
 * Dell Optiplex 9020 Micro
  * Intel Core i5-4590T @ 2.00 GHz
  * 16gb DDR3-1600
  * 128gb SSD

<<TableOfContents>>

== k8s notes ==

 * Make a simple 3-node cluster
 * Single-node control plane will run externally, on illustrious
 * Use kubeadm to build the cluster: https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/
 * Selected containerd as the container runtime
 * Will use Flannel as the networking plugin
 * Allocated IPs:
  * persica1 / 192.168.1.31
  * persica2 / 192.168.1.32
  * persica3 / 192.168.1.33
 * Ingress: undecided so far
 * Cgroup driver: let's use systemd
 * k8s version: whatever is latest right now (2023-04-04)

== Build notes ==

 * Full UEFI mode
 * PXE boot for kickstart install
 * tftpd-hpa running on illustrious
  * Upstream repo mirror: https://repo.almalinux.org/almalinux/9/BaseOS/x86_64/os/EFI/BOOT/
 * kickstart file served from `/data/www/illustrious/ks`: https://illustrious.thighhighs.top/ks/persica1.ks.cfg
 * KS references:
  * Reference manual: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/9/html/performing_an_advanced_rhel_9_installation/kickstart-commands-and-options-reference_installing-rhel-as-an-experienced-user#keyboard-required_kickstart-commands-for-system-configuration
  * Generator tool: https://access.redhat.com/labs/kickstartconfig/

This was useful for figuring out the TFTP stuff for the first time. Paths are hardcoded into the `grubx64.efi` binary, meaning HDD and PXE versions aren't the same. Make sure you put all the grub stuff in a `grub/` directory. Check the `$prefix` to see where it's searching: https://askubuntu.com/questions/1183487/grub2-efi-boot-via-pxe-load-config-file-automatically

I should ansible'ise everything. Can I start with this?
{{{
AlmaLinux 9 - AppStream                                                                                                                                                                          3.0 MB/s | 3.1 kB     00:00
Importing GPG key 0xB86B3716:
 Userid     : "AlmaLinux OS 9 <packager@almalinux.org>"
 Fingerprint: BF18 AC28 7617 8908 D6E7 1267 D36C B86C B86B 3716
 From       : /etc/pki/rpm-gpg/RPM-GPG-KEY-AlmaLinux-9
Is this ok [y/N]: y
Key imported successfully
}}}