Não monta "/vagrant" na AWS

Tive que fazer duas alterações em relação ao exercício da aula 6 para subir a máquina na AWS:

1. incluí uma tag ws.region = 'us-west-2' que não constava no roteiro
2. usei uma máquina Ubuntu 16.04 LTS 64 bits, pois não havia 32 bits disponível

Com isso a máquina subiu, porém a pasta /vagrant não está aparecendo na VM.

Mensagem que aparece quando faço um vagrant up --provider=aws:

$ vagrant up --provider=aws
Bringing machine 'web' up with 'aws' provider...
==> web: Warning! The AWS provider doesn't support any of the Vagrant
==> web: high-level network configurations (`config.vm.network`). They
==> web: will be silently ignored.
==> web: Launching an instance with the following settings...
==> web:  -- Type: m3.medium
==> web:  -- AMI: ami-db710fa3
==> web:  -- Region: us-west-2
==> web:  -- Keypair: devops
==> web:  -- Security Groups: ["devops"]
==> web:  -- Block Device Mapping: []
==> web:  -- Terminate On Shutdown: false
==> web:  -- Monitoring: false
==> web:  -- EBS optimized: false
==> web:  -- Source Destination check: 
==> web:  -- Assigning a public IP address in a VPC: false
==> web:  -- VPC tenancy specification: default
==> web: Waiting for instance to become "ready"...
==> web: Waiting for SSH to become available...
==> web: Machine is booted and ready for use!
No host IP was given to the Vagrant core NFS helper. This is
an internal error that should be reported as a bug.

Este é meu Vagrantfile:

Vagrant.configure("2") do |config|

  config.vm.box = "ubuntu_aws"
  config.vm.box_url = "https://github.com/mitchellh/vagrant-aws/raw/master/dummy.box"

  config.vm.provider :aws do |aws, override|
     aws.access_key_id = "(omiti)"
     aws.secret_access_key = "(omiti)"
     aws.region = 'us-west-2'

     aws.keypair_name = "devops"
     aws.ami = "ami-db710fa3"
     aws.security_groups = ['devops']

     override.ssh.username = "ubuntu"
     override.ssh.private_key_path = "devops.pem"

  end

  config.vm.define :web do |web_config|
     web_config.vm.network "private_network", ip: "192.168.50.10"

     web_config.vm.provider :aws do |aws|
        aws.tags = { 'Name' => 'MusicJungle (vagrant)'}
     end

     web_config.vm.provision "puppet" do |puppet|
        puppet.manifest_file = "web.pp"
     end
   end

end