#cloud-config
# Let cloud-init set hostname from Proxmox “Hostname” field.
preserve_hostname: false
manage_etc_hosts: true
timezone: America/Chicago

ssh_pwauth: false        # => PasswordAuthentication no
disable_root: true       # => PermitRootLogin no

users:
  - name: admin
    gecos: Admin
    groups: [sudo]
    shell: /bin/bash
    sudo: ALL=(ALL) NOPASSWD:ALL
    lock_passwd: true
    ssh_authorized_keys:
      - ssh-ed25519 ifhdiodfsuahadosif;hadso;ihn test@test
      - ssh-ed25519 ifhdiodfsuahadosif;hadso;ihn test@test

# Prep Steps:
bootcmd:
  - mkdir -p /etc/apt/keyrings
  - mkdir -p /etc/systemd/journald.conf.d
  - mkdir -p /usr/share/keyrings

# import docker key
write_files:
  - path: /usr/share/keyrings/docker.asc
    owner: root:root
    permissions: '0644'
    content: |
      -----BEGIN PGP PUBLIC KEY BLOCK-----

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      -----END PGP PUBLIC KEY BLOCK-----

  - path: /etc/docker/daemon.json
    permissions: '0644'
    content: |
      {
        "max-concurrent-downloads": 24,
        "max-concurrent-uploads": 8
      }
      
  # Unattended Upgrades
  - path: /etc/apt/apt.conf.d/20auto-upgrades
    owner: root:root
    permissions: '0644'
    content: |
      APT::Periodic::Update-Package-Lists "1";
      APT::Periodic::Unattended-Upgrade "1";
      APT::Periodic::AutocleanInterval "7";

  # unattended-upgrades policy
  - path: /etc/apt/apt.conf.d/52unattended-upgrades-local
    owner: root:root
    permissions: '0644'
    content: |
      Unattended-Upgrade::Origins-Pattern {
        "origin=Debian,codename=${distro_codename}-security,label=Debian-Security";
        "origin=Debian,codename=${distro_codename},label=Debian-Security";
      };
      Unattended-Upgrade::Remove-Unused-Dependencies "true";
      Unattended-Upgrade::Automatic-Reboot "false";
      Unattended-Upgrade::Automatic-Reboot-WithUsers "false";
      Unattended-Upgrade::MinimalSteps "true";

# Create a docker-compose file where you want it to live
  - path: /home/admin/apps/docker-compose.yml
    permissions: '0644'
    content: |

  # Create swap
  - path: /etc/systemd/zram-generator.conf
    owner: root:root
    permissions: '0644'
    content: |
      [zram0]
      zram-size = min(ram / 2, 512)
      compression-algorithm = zstd
      swap-priority = 150

  - path: /etc/sysctl.d/99-cloud-tuning.conf
    owner: root:root
    permissions: '0644'
    content: |
      vm.swappiness = 10

# --- APT & packages ---
package_update: true
package_upgrade: true

apt:
  sources:
    docker.list:
      source: deb [arch=amd64 signed-by=/usr/share/keyrings/docker.asc] https://download.docker.com/linux/debian trixie stable

packages:
  - qemu-guest-agent
  - cloud-guest-utils
  - systemd-zram-generator
  - docker-ce
  - docker-ce-cli
  - containerd.io
  - docker-buildx-plugin
  - docker-compose-plugin

# Grow root disk if the template disk is expanded later
growpart:
  mode: auto
resize_rootfs: true

runcmd:
  # admin user setup
  - install -d -o admin -g admin /home/admin/apps
  - chown -R admin:admin /home/admin
  - chmod 700 /home/admin
  - chown -R admin:admin /home/admin/.ssh || true
  - usermod -aG docker admin
  # sys reload
  - systemctl daemon-reload
  - systemctl enable --now qemu-guest-agent
  - systemctl enable --now dev-zram0.swap
  - systemctl start systemd-zram-setup@zram0.service || true
  - sysctl -p /etc/sysctl.d/99-cloud-tuning.conf || sysctl --system
  - systemctl enable --now docker
  - systemctl enable --now unattended-upgrades
  - systemctl reload ssh || systemctl restart ssh
  # housekeeping
  - apt -y autoremove --purge
  - apt -y autoclean
  - apt -y clean  
  
power_state:
  mode: poweroff            # or reboot / halt
  message: "cloud-init complete; shutting down for templating"
  delay: "+1"