Get a VM with a specific version of the kubectl client.

Vagrantfile.kubectl.version

# encoding: utf-8
# -*- mode: ruby -*-
# vi: set ft=ruby :

#put <<FYI
# create a virtualbox vm with the latest version of kubectl
# vagrant up 
# create a virtualbox vm with a specific version of kubectl
# KUBECTL_VER=v1.9.7 vagrant up 
#FYI

# Box / OS
VAGRANT_BOX = 'minimal/xenial64'

if( ENV['KUBECTL_VER'] == nil)
  SUFFIX = 'v-latest'
else 
  SUFFIX = ENV['KUBECTL_VER'].dup.gsub!(/[\.]/, '-').to_s
end

# kubectl version
## Uncomment for the latest version
ENV['KUBECTL_VER'] = '$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)'

# VM Name with kubectl version suffix
VM_NAME = 'kubectl-' + SUFFIX
# VM User — 'vagrant' for simplification across local vms
VM_USER = 'vagrant'

# passthrough some environment variables from the host to the guest machine
# when the shell starts with the install script, it will load environment variables from /etc/profile.d/*.sh
$set_environment_variables = <<SCRIPT
tee "/etc/profile.d/vagrantvars.sh" > "/dev/null" <<EOF  
# The kubectl version
export KUBECTL_VER=#{ENV['KUBECTL_VER']}
EOF
SCRIPT


Vagrant.configure(2) do |config|
  # Vagrant box from Hashicorp
  config.vm.box = VAGRANT_BOX
  
  #use the default 'insecure' key
  # this simplifies repackaging the box later 
  # and for a non-server, non-public, local machine this is fine
  config.ssh.insert_key = false

  # Actual machine name
  config.vm.hostname = VM_NAME
  # Set VM name in Virtualbox
  config.vm.provider "virtualbox" do |v|
    v.name = VM_NAME
    v.memory = 2048
  end
  #DHCP — comment this out if planning on using NAT instead
  config.vm.network "private_network", type: "dhcp"

  # Disable default Vagrant folder, use a unique path per project
  config.vm.synced_folder '.', '/home/' + VM_USER + '/host_' + VM_NAME

  # Put the environment 
  config.vm.provision "shell", inline: $set_environment_variables, run: "always"

  # Install kubectl
  config.vm.provision "shell", inline: <<-SHELL
	  curl -LO https://storage.googleapis.com/kubernetes-release/release/$KUBECTL_VER/bin/linux/amd64/kubectl
    chmod +x ./kubectl
	  sudo mv ./kubectl /usr/local/bin/kubectl
  SHELL
end

Vagrantfile to:
create a virtualbox vm with the latest version of kubectl
vagrant up
create a virtualbox vm with a specific version of kubectl
KUBECTL_VER=v1.9.7 vagrant up

If you halt and up again, you can specify a different version. If you halt and don't specify any version, you will get latest