sunbeam-multi-node.yml

name: Sunbeam Multi-node

on:
  # Runs on pushes targeting the default branch
  push:
    branches: ["act"]

  # Allows you to run this workflow manually from the Actions tab
  workflow_dispatch:
    inputs:
      workaround:
        description: 'Apply a workaround'
        required: true
        default: true
        type: boolean
      hardware_profile:
        description: 'Specs for each machine'
        required: true
        default: minimal
        type: choice
        options:
          - minimal
          - minimal-with-cpu-overcommit
          - tutorial
          - allowance

permissions:
  contents: read

env:
  COLUMNS: 160  # default: 80
  DEBIAN_FRONTEND: noninteractive

defaults:
  run:
    shell: bash -ex {0}

jobs:
  sunbeam-multi-node-tutorial:
    name: Sunbeam Multi-node Tutorial
    runs-on: [ubuntu-24.04]
    steps:
      - uses: actions/checkout@v4
      - name: Check machine specs
        run: |
          systemd-detect-virt || true
          lscpu
          free -h
          lsblk
          lsblk -f
          cat /etc/os-release
          ip -br a
          ip r
          resolvectl --no-pager
      # TODO: check if greenfield or brownfield first
      - name: Install prerequisites
        if: ${{ !env.ACT }}
        run: |
          sudo apt-get update
          sudo apt-get install -y uvtool j2cli
      - name: Download a VM image
        if: ${{ !env.ACT }}
        run: |
          sg libvirt 'uvt-simplestreams-libvirt sync release=noble arch=amd64'
          sg libvirt 'uvt-simplestreams-libvirt query'
      - name: Prepare SSH, virtual network bridge, and virtual machines
        if: ${{ !env.ACT }}
        run: |
          # SSH
          ssh-keygen -t ed25519 -f ~/.ssh/id_ed25519 -N ''
          cat <<EOF | tee -a ~/.ssh/config
          Host sunbeam-machine-1
              User ubuntu
              Hostname 192.168.124.11
          Host sunbeam-machine-2
              User ubuntu
              Hostname 192.168.124.12
          Host sunbeam-machine-3
              User ubuntu
              Hostname 192.168.124.13
          EOF

          # bridge
          sg libvirt 'virsh -c qemu:///system net-define /dev/stdin <<EOF
          <network>
            <name>sunbeam-virbr0</name>
            <bridge name="sunbeam-virbr0" stp="off"/>
            <forward mode="nat"/>
            <ip address="192.168.124.1" netmask="255.255.255.0" />
          </network>
          EOF
          '
          sg libvirt 'virsh -c qemu:///system net-autostart sunbeam-virbr0'
          sg libvirt 'virsh -c qemu:///system net-start sunbeam-virbr0'
      - name: Clean up previous virtual machines
        if: ${{ env.ACT }}
        run: |
          for i in {1..3}; do
              # FIXME: the requirement of FQDN is not documented well in each tutorial
              sg libvirt "uvt-kvm destroy 'sunbeam-machine-${i}.localdomain'" || true
          done
      - name: Prepare virtual machines
        run: |
          for i in {1..3}; do
              sg libvirt "uvt-kvm create \
                  --machine-type q35 \
                  --cpu '4' \
                  --host-passthrough \
                  --memory '$((16 * 1024))' \
                  --disk '128' \
                  --ephemeral-disk '128' \
                  --ephemeral-disk '128' \
                  --unsafe-caching \
                  --bridge sunbeam-virbr0 \
                  --network-config /dev/stdin \
                  --ssh-public-key-file ~/.ssh/id_ed25519.pub \
                  --no-start \
                  sunbeam-machine-${i}.localdomain \
                  release=noble <<EOF
          network:
            version: 2
            ethernets:
              enp1s0:
                dhcp4: false
                dhcp6: false
                accept-ra: false
                addresses:
                  - 192.168.124.1${i}/24
                routes:
                  - to: default
                    via: 192.168.124.1
                nameservers:
                  addresses:
                    - 192.168.124.1
          EOF
          "
          done

          # secondary NIC
          for i in {1..3}; do
              sg libvirt "virsh -c qemu:///system attach-interface 'sunbeam-machine-${i}.localdomain' \
                  network sunbeam-virbr0 \
                  --model virtio --config
              "
          done

          for i in {1..3}; do
              sg libvirt "virsh -c qemu:///system start 'sunbeam-machine-${i}.localdomain'"
          done

          for i in {1..3}; do
              until ssh -oStrictHostKeyChecking=no "sunbeam-machine-${i}" -- 'cloud-init status --wait; ip -br a; lsblk'; do
                  sleep 5
              done
          done