fixup! Adds support for cold migration to drain script

Author: jovial

etc/kayobe/ansible/nova-compute-drain.yml

@@ -9,3 +9,4 @@
   tasks:
     - include_role:
         name: nova-compute-drain
+      run_once: true

etc/kayobe/ansible/roles/nova-compute-drain/tasks/cold-migrate.yml

@@ -34,6 +34,5 @@
   delegate_to: "{{ nova_compute_drain_delegate_host }}"
   vars:
     ansible_host: "{{ hostvars[nova_compute_drain_delegate_host].ansible_host }}"
-    instance_uuid: "{{ item.ID | default }}"
   rescue:
     - meta: noop

etc/kayobe/ansible/roles/nova-compute-drain/tasks/live-migrate.yml

@@ -11,7 +11,6 @@
   delegate_to: "{{ nova_compute_drain_delegate_host }}"
   environment: "{{ openstack_auth_env }}"
   vars:
-    instance_uuid: "{{ item.ID | default }}"
     ansible_host: "{{ hostvars[nova_compute_drain_delegate_host].ansible_host }}"
   register: result
   failed_when:

etc/kayobe/ansible/roles/nova-compute-drain/tasks/main.yml

@@ -0,0 +1,33 @@
+---
+- include_tasks:
+    name: setup.yml
+
+- include_tasks:
+    name: instance-info.yml
+
+- include_tasks:
+    name: live-migrate.yml
+  loop: "{{ nova_compute_drain_instance_info | selectattr('Status', 'equalto', 'ACTIVE') | list }}"
+  loop_control:
+    label: "{{ item.ID | default }}"
+  vars:
+    instance_uuid: "{{ item.ID | default }}"
+
+- include_tasks:
+    name: cold-migrate.yml
+  loop: "{{ nova_compute_drain_instance_info | selectattr('Status', 'equalto', 'SHUTOFF') | list }}"
+  loop_control:
+    label: "{{ item.ID | default }}"
+  vars:
+    instance_uuid: "{{ item.ID | default }}"
+
+- include_tasks:
+    name: instance-info.yml
+
+- name: Fail if there are instances still on the host
+  fail:
+    msg: >
+      Instances still on {{ inventory_hostname }}: {{ instances.stdout | from_json }}
+  when:
+    - nova_compute_migration_fatal | bool
+    - nova_compute_drain_instance_info | length > 0

etc/kayobe/ansible/roles/nova-compute-drain/tasks/setup.yml

@@ -8,7 +8,6 @@
       - setuptools
     state: latest
     virtualenv_command: /usr/bin/python3.6 -m venv
-  run_once: true
   delegate_to: "{{ nova_compute_drain_delegate_host }}"
   vars:
     # NOTE: Without this, the delegate ansible_host variable will not
@@ -21,7 +20,6 @@
     name:
       - python-openstackclient
     extra_args: "{% if pip_upper_constraints_file %}-c {{ pip_upper_constraints_file }}{% endif %}"
-  run_once: true
   delegate_to: "{{ nova_compute_drain_delegate_host }}"
   vars:
     # NOTE: Without this, the delegate's ansible_host variable will not