Allow deployment of Undercloud (VM) without direct access to the underlying virthost.

This commit adds a playbook (based on baremetal-undercloud) calling
a generic baremetal provisioning script to deploy a Undercloud VM.
Such script should return when the Undercloud VM is accessible via ssh.
Afterwards the playbook resumes the expected workflow of inventory generation,
repositories setup etc.

Change-Id: Iea00c2a54e10d725b2ab9ee6ce5d71c64a460c02

playbooks/baremetal-undercloud-minimal.yml

@@ -0,0 +1,96 @@
+---
+- name: Provision undercloud by directly calling provisioning script
+  hosts: localhost
+  pre_tasks:
+    - name: Provision script execution
+      shell: >
+        set -o pipefail &&
+        {{ baremetal_provisioning_script }} 2>&1 | tee
+        "{{ local_working_dir }}/baremetal_provision.log"
+      when: step_provide_undercloud|bool
+
+    - name: Add the undercloud VM to the inventory
+      add_host:
+        name: "{{ undercloud_eth0_ip }}"
+        groups: undercloud
+        ansible_user: "root"
+        ansible_private_key_file: "{{ ansible_private_key_file_location | default('') }}"
+        ansible_ssh_common_args: '-o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no'
+
+    - name: Copy the private key to the expected location
+      copy:
+        src: "{{ ansible_private_key_file_location }}"
+        dest: "{{ local_working_dir }}/id_rsa_undercloud"
+        mode: 0600
+
+- name: Inventory the undercloud
+  hosts: localhost
+  gather_facts: true
+  vars:
+    inventory: undercloud
+  roles:
+    - tripleo-inventory
+
+- name: Setup repositories
+  hosts: undercloud
+  gather_facts: true
+  roles:
+    - repo-setup
+  tags:
+    - undercloud-repo-setup
+
+- name: Install packages
+  hosts: undercloud
+  gather_facts: false
+  roles:
+    - baremetal-undercloud/packages
+  tags:
+    - undercloud-pkgs-install
+
+# Small playbook with logic for when to build images or not.
+# The logic there can be completely overridden by setting the
+# to_build variable.
+- include: to-build-or-not-to-build.yml
+
+- name: Run DLRN gate role and install repo
+  hosts: undercloud
+  vars:
+    artg_compressed_gating_repo: "${HOME}/gating_repo.tar.gz"
+    artg_repos_dir: "{{ repo_clone_dir|default('/opt/stack/new') }}"
+    ib_create_web_repo: "{{ to_build|bool }}"
+  roles:
+    - {role: build-test-packages, when: build_test_packages|default(false)|bool}
+    - {role: install-built-repo, when: compressed_gating_repo is defined}
+  tags:
+    - build
+
+- name: Get images for quickstart
+  hosts: undercloud
+  gather_facts: false
+  vars:
+    ib_repo_image_inject: "{{ not to_build|bool }}"
+    ib_repo_run_live: false
+    modify_image_vc_ram: 4096
+    modify_image_vc_cpu: 4
+    modify_image_vc_verbose: true
+  roles:
+    - {role: fetch-images,
+       when: not to_build|bool}
+    - {role: repo-setup,
+       repo_inject_image_path: "$HOME/overcloud-full.qcow2",
+       repo_run_live: false,
+       when: not to_build|bool}
+    - {role: repo-setup,
+       repo_inject_image_path: "$HOME/ironic-python-agent.initramfs",
+       repo_run_live: false,
+       initramfs_image: true,
+       libguestfs_mode: false,
+       when: not to_build|bool}
+    - {role: install-built-repo,
+       ib_repo_image_path: "$HOME/overcloud-full.qcow2",
+       when: compressed_gating_repo is defined and not to_build|bool}
+    - {role: install-built-repo,
+       ib_repo_image_path: "$HOME/ironic-python-agent.initramfs",
+       initramfs_image: true,
+       libguestfs_mode: false,
+       when: compressed_gating_repo is defined and not to_build|bool}