Add Vagrant CI (#5487)

.gitlab-ci/vagrant.yml

@@ -14,3 +14,24 @@ molecule_tests:
     - python -m pip install -r tests/requirements.txt
   script:
     - ./tests/scripts/molecule_run.sh
+
+.vagrant:
+  extends: .testcases
+  variables:
+    CI_PLATFORM: "vagrant"
+    SSH_USER: "kubespray"
+    VAGRANT_DEFAULT_PROVIDER: "libvirt"
+  tags: [vagrant]
+  only: [/^pr-.*$/]
+  except: ['triggers']
+  image: quay.io/miouge/kubespray-vagrant
+  services: []
+  script:
+    - vagrant up
+  after_script:
+    - vagrant destroy --force
+
+vagrant_ubuntu18-flannel:
+  stage: deploy-part2
+  extends: .vagrant
+  when: on_success