k8s multinode cluster Vagrantfile file

Vagrantfile

all_hosts = [
    {
        vagrant_hostname: "master",
        full_hostname: "amachine.virtual.machine",
        vmbox: "fedora/31-cloud-base",
        vmbox_version: "31.20191023.0",
        ip: "10.0.0.10",
        memory: 2048,
        cpus: 1
    },
    {
        vagrant_hostname: "worker1",
        full_hostname: "another.virtual.machine",
        vmbox: "fedora/31-cloud-base",
        vmbox_version: "31.20191023.0",
        ip: "10.0.0.12",
        memory: 2048,
        cpus: 1
    },
]

# individual machine names must be mentioned is below command line in
# order to bring machines. (due to autostart: false)
# vagrant up amachine anotherMachine
Vagrant.configure("2") do |config|
    #config.vm.box = "fedora/31-cloud-base"
    #config.vm.box_version = "31.20191023.0"

    all_hosts.each do |host|
        config.vm.define host[:vagrant_hostname], autostart: false do |this_host|
            this_host.vm.network :private_network, ip: host[:ip]
            this_host.vm.hostname = host[:full_hostname]
            this_host.vm.box = host[:vmbox]
            this_host.vm.box_version = host[:vmbox_version]

            this_host.vm.provider "virtualbox" do |m|
                m.memory = host[:memory]
                m.cpus = host[:cpus]
            end
        end
    end
    # config.vm.synced_folder ".", "/vagrant", type: "nfs"
    config.vm.provision :shell, privileged: true, inline: $install_docker
    config.vm.provision :shell, privileged: true, inline: $install_k8s

end

$install_docker = <<-DOCKER
echo "=====================Installing Docker ========================="
dnf -y install dnf-plugins-core
dnf config-manager --add-repo https://download.docker.com/linux/fedora/docker-ce.repo
dnf -y install docker-ce docker-ce-cli containerd.io
dnf -y install grubby
grubby --update-kernel=ALL --args="systemd.unified_cgroup_hierarchy=0"
systemctl start docker
systemctl enable docker
DOCKER

$install_k8s = <<-K8S
echo "=====================Installing K8S ========================="
update-alternatives --set iptables /usr/sbin/iptables-legacy

cat <<EOF > /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl --system

cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
EOF

# Set SELinux in permissive mode (effectively disabling it)
setenforce 0
sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config

yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes
systemctl enable --now kubelet
K8S