user-data.yaml

#cloud-config

ssh_import_id:
  - lp:arif-ali

byobu_by_default: enable

timezone: "Europe/London"

# Allow ssh passwords
ssh_pwauth: True

## Update apt database and upgrade packages on first boot
package_update: true
package_upgrade: true

users:
  - default
  - name: virsh
    lock_passwd: false
    passwd: $6$SVOxUrhz9mNyscUJ$hKF0RMY1nkGC3BpiozpaznE3AWerd8Ac8AlV9YEpLx50bLw5zweFCuTEEdS04McJNlaIqA.E4HiPuaIYGMzlH/
    shell: "/bin/rbash"
    ssh_import_id:
      - lp:arif-ali

## Install additional packages on first boot
packages:
  - virtinst
  - jq
  - ksmtuned
  - openvswitch-switch

snap:
  commands:
    - ['install', 'maas']

## Write arbitrary files to the file-system (including binaries!)
write_files:
  - path: /root/initial_setup.sh
    content: |
      #!/bin/bash

      git clone https://github.com/arif-ali/maas-autobuilder.git /root/maas-autobuilder
      cd /root/maas-autobuilder/configs
      ln -sf ${HOSTNAME}.config hypervisor.config

      cd ../
      chmod +x manage-vm-nodes.sh
      ./manage-vm-nodes.sh -c
    permissions: '0755'
    owner: root:root
  - path: /root/install_kvm.sh
    content: |
      #!/bin/bash

      series=$(lsb_release -c -s)

      if [[ $series == "bionic" ]] ; then
          pkgs="qemu-kvm libvirt-bin qemu-efi"
      else
          pkgs="libvirt-daemon-system libvirt-clients"
      fi

      apt -y update
      apt -y install $pkgs

      mkdir -p /home/virsh/bin
      ln -s /usr/bin/virsh /home/virsh/bin/virsh
      sh -c echo "PATH=/home/virsh/bin" >> /home/virsh/.bashrc

      systemctl restart sshd

      usermod -a -G libvirt,libvirt-qemu virsh
    permissions: '0755'
    owner: root:root
  - path: /etc/ssh/sshd_config.d/90-virsh-user.conf
    content: |
      Match user virsh
          X11Forwarding no
          AllowTcpForwarding no
          PermitTTY no
          ForceCommand nc -q 0 -U /var/run/libvirt/libvirt-sock
    owner: root:root
  - path: /root/wipe_disk.sh
    content: |
      #!/bin/bash

      dd if=/dev/zero of=/dev/sda bs=1M count=1000
    permissions: '0755'
    owner: root:root
  - path: /etc/netplan/99-custom.yaml
    content: |
      network:
        version: 2
        ethernets:
          enp1s0:
             wakeonlan: true
             link-local: []
          enp2s0:
             wakeonlan: true
             link-local: []
          enp3s0:
             wakeonlan: true
             link-local: []
    permissions: '0644'
    owner: root:root
  - path: /etc/sysctl.d/99-custom.conf
    content: |
      kernel.softlockup_all_cpu_backtrace=1
    permissions: '0644'
    owner: root:root

# Runs any command that we need to run post install
runcmd:
  - [ "/root/install_kvm.sh" ]
  - [ "rm", "/root/install_kvm.sh" ]
  - [ "/root/initial_setup.sh" ]
  - [ "rm", "/root/initial_setup.sh" ]
  - [ "netplan", "apply" ]
  - [ "sysctl", "-p", "--system"]