Vagrantfile for building Docker images and converting them to Singularity

Vagrantfile

# -*- mode: ruby -*-
# vi: set ft=ruby :

Vagrant.configure("2") do |config|
  # EPEL has a fairly recent Singularity, no need to build from source
  # Geerling's box uses LVM, so its root filesystem can be expanded
  config.vm.box = "geerlingguy/centos7"
  config.vm.hostname = "docker-singularity"

  # VM specs (200 GB required for Vitis-AI build, others may need more or less)
  config.disksize.size = '200GB'
  config.vm.provider "virtualbox" do |vb|
    vb.cpus = "4"
    vb.memory = "16384"
  end

  # Expand root partition, get Docker and Singularity runnning
  config.vm.provision "bootstrap", type: "shell", inline: <<-SHELL
    yum -q -y update
    yum -q -y install epel-release yum-utils
    yum -q -y install cloud-utils-growpart
    growpart /dev/sda 2
    pvresize /dev/sda2
    lvextend /dev/centos/root -l +100%FREE
    xfs_growfs /
    yum -q -y install singularity
    yum-config-manager --add-repo https://download.docker.com/linux/centos/docker-ce.repo
    yum -q -y install docker-ce docker-ce-cli containerd.io
    systemctl start docker && systemctl enable docker
  SHELL

  # Build Docker container and convert to Singularity
  # https://stackoverflow.com/a/60316979
  config.vm.provision "build", type: "shell", inline: <<-SHELL
    ( cd /vagrant/ && \
      docker build -t local/xfemm -f Dockerfile.xfemm . && \
      singularity build --force xfemm.sif docker-daemon://local/xfemm:latest )
  SHELL
end