microos-k3s-cloud-init.yaml

#cloud-config
users:
- name: rancher
  sudo: ALL=(ALL) NOPASSWD:ALL
  groups: users, sudo
  ssh_authorized_keys:
    - ssh-ed25519 [...]
zypper:
  repos:
    - id: rancher-k3s-common-stable
      name: Rancher K3s Common (Stable)
      baseurl: https://rpm.rancher.io/k3s/stable/common/microos/noarch
      enabled: 1
      gpgcheck: 1
      repo_gpgcheck: 0
      gpgkey: https://rpm.rancher.io/public.key
write_files:
  - path: /etc/rancher/k3s/config.yaml
    content: |
      protect-kernel-defaults: "true"
  - path: /etc/sysctl.d/90-kubelet.conf
    content: |
      vm.panic_on_oom=0
      vm.overcommit_memory=1
      kernel.panic=10
      kernel.panic_on_oops=1
      kernel.keys.root_maxbytes=25000000
  - path: /etc/sysctl.d/90-k3s-net.conf
    content: |
      net.ipv4.conf.all.forwarding=1
      net.ipv6.conf.all.forwarding=1
  - path: /tmp/install
    content: |
      zypper refresh
      zypper dup -y
      zypper install -y qemu-guest-agent nano htop container-selinux k3s-selinux open-iscsi nfs-client
      systemctl enable --now qemu-guest-agent
      sed -i "s/GRUB_TIMEOUT=10/GRUB_TIMEOUT=1/g" /etc/default/grub
      grub2-mkconfig > /boot/grub2/grub.cfg
growpart:
  mode: auto
  devices: ['/', '/var']
runcmd:
  - transactional-update run sh -c "$(cat /tmp/install)"
  - curl -sfL https://get.k3s.io | INSTALL_K3S_SKIP_START=true INSTALL_K3S_SKIP_SELINUX_RPM=true sh -
  - reboot