Fedora CoreOS k3s ignition

README.md

Installing k3s on Fedora CoreOS

Use the templates to provision your k3s instances on Fedora CoreOS using ignition. This will install k3s-selinux with rpm-ostree.

ignition-bootstrap.yaml

variant: fcos
version: 1.5.0
systemd:
  units:
  - name: k3s-installer.service
    enabled: true
    contents: |
      [Unit]
      After=network-online.target
      Wants=network-online.target
      Before=systemd-user-sessions.service
      OnFailure=emergency.target
      OnFailureJobMode=replace-irreversibly
      ConditionPathExists=!/var/lib/rancher/k3s
      [Service]
      RemainAfterExit=yes
      Type=oneshot
      ExecStart=/usr/local/bin/run-k3s-installer
      ExecStartPost=/usr/bin/systemctl --no-block reboot
      StandardOutput=kmsg+console
      StandardError=kmsg+console
      [Install]
      WantedBy=multi-user.target
storage:
  files:
    - path: /usr/local/bin/run-k3s-installer
      mode: 0755
      contents:
        inline: |
          #!/usr/bin/env sh
          main() {
            export K3S_TOKEN=SECRET # Please replace this.
            curl -sfL https://get.k3s.io | sh - server --cluster-init
            return 0
          }
          main

ignition-control-plane.yaml

variant: fcos
version: 1.5.0
systemd:
  units:
  - name: k3s-installer.service
    enabled: true
    contents: |
      [Unit]
      After=network-online.target
      Wants=network-online.target
      Before=systemd-user-sessions.service
      OnFailure=emergency.target
      OnFailureJobMode=replace-irreversibly
      ConditionPathExists=!/var/lib/rancher/k3s
      [Service]
      RemainAfterExit=yes
      Type=oneshot
      ExecStart=/usr/local/bin/run-k3s-installer
      ExecStartPost=/usr/bin/systemctl --no-block reboot
      StandardOutput=kmsg+console
      StandardError=kmsg+console
      [Install]
      WantedBy=multi-user.target
storage:
  files:
    - path: /usr/local/bin/run-k3s-installer
      mode: 0755
      contents:
        inline: |
          #!/usr/bin/env sh
          main() {
            export K3S_TOKEN=SECRET # Please replace this.
            curl -sfL https://get.k3s.io | sh -s - server --server https://<ip or hostname of bootstrap>:6443 
            return 0
          }
          main

ignition-workers.yaml

variant: fcos
version: 1.5.0
systemd:
  units:
  - name: k3s-installer.service
    enabled: true
    contents: |
      [Unit]
      After=network-online.target
      Wants=network-online.target
      Before=systemd-user-sessions.service
      OnFailure=emergency.target
      OnFailureJobMode=replace-irreversibly
      ConditionPathExists=!/var/lib/rancher/k3s
      [Service]
      RemainAfterExit=yes
      Type=oneshot
      ExecStart=/usr/local/bin/run-k3s-installer
      ExecStartPost=/usr/bin/systemctl --no-block reboot
      StandardOutput=kmsg+console
      StandardError=kmsg+console
      [Install]
      WantedBy=multi-user.target
storage:
  files:
    - path: /usr/local/bin/run-k3s-installer
      mode: 0755
      contents:
        inline: |
          #!/usr/bin/env sh
          main() {
            export K3S_TOKEN=SECRET # Please replace this.
            curl -sfL https://get.k3s.io | sh -s - agent --server https://<ip or hostname of your kubernetes API>:6443 
            return 0
          }
          main