Ao tentar executar o vagrant up o building parece parar na parte do script:

apt-add-repository --yes --update ppa:ansible/ansible && \

Vagrantfile

      config.vm.define "ansible" do |ansible|
        ansible.vm.network "public_network", ip: "192.168.0.43", bridge: "wlp2s0"
        ansible.vm.provision "shell", inline: "apt-get update && apt-get install -y fish"
        ansible.vm.provision "shell",
          inline: "apt-get update && \
                   apt-get install -y software-properties-common && \
                   apt-add-repository --yes --update ppa:ansible/ansible && \
                   apt-get install -y ansible"
        ansible.vm.provision "shell",
          inline: "cp /vagrant/id_bionic >> /home/vagrant && chmod 600 /home/vagrant/id_bionic"
      end

Log do Linux

==> ansible: Running provisioner: shell...
    ansible: Running: inline script
    ansible: Hit:1 http://archive.ubuntu.com/ubuntu bionic InRelease
    ansible: Hit:2 http://archive.ubuntu.com/ubuntu bionic-updates InRelease
    ansible: Hit:3 http://archive.ubuntu.com/ubuntu bionic-backports InRelease
    ansible: Hit:4 http://security.ubuntu.com/ubuntu bionic-security InRelease
    ansible: Reading package lists...
    ansible: Reading package lists...
    ansible: Building dependency tree...
    ansible: 
    ansible: Reading state information...
    ansible: software-properties-common is already the newest version (0.96.24.32.11).
    ansible: software-properties-common set to manually installed.
    ansible: 0 upgraded, 0 newly installed, 0 to remove and 21 not upgraded.
    ansible: Error: retrieving gpg key timed out.
The SSH command responded with a non-zero exit status. Vagrant
assumes that this means the command failed. The output for this command
should be in the log above. Please read the output to determine what

Arquivo de Log completo

Já tentei inclusive executar o comando direto na CLI com sudo mas não recebo nenhum resultado.

sudo apt-add-repository --yes --update ppa:ansible/ansible

A barra do CLI até pisca as vezes, mas sem resultado.

vagrant@ubuntu-bionic ~> sudo apt-add-repository --yes --update ppa:ansible/ansible

CLI do linux

Após executar o comando sudo apt-get install -y ansible direto no CLI consigo visualizar a versão do ansible normalmente.

vagrant@ubuntu-bionic ~> sudo apt-get install -y ansible
vagrant@ubuntu-bionic ~> ansible-playbook --version
ansible-playbook 2.5.1
  config file = /etc/ansible/ansible.cfg
  configured module search path = [u'/home/vagrant/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /usr/lib/python2.7/dist-packages/ansible
  executable location = /usr/bin/ansible-playbook
  python version = 2.7.15+ (default, Oct  7 2019, 17:39:04) [GCC 7.4.0]
vagrant@ubuntu-bionic ~> 

Pergunta

Eu preciso realmente executar a linha apt-add-repository --yes --update ppa:ansible/ansible para conseguir utilizar o ansible? O que isso prejudica? Alias, para que serve essa linha?