openqa/worker: do createhdds on ppc worker

This is needed to create the ppc virt-install images (has to be
done on a machine of compatible arch).

roles/openqa/worker/tasks/createhdds.yml

@@ -0,0 +1,41 @@
+# Required vars
+# (none)
+
+- name: Install required packages
+  dnf: name={{ item }} state=present
+  with_items:
+  - libvirt-python3
+  - python3-libguestfs
+  - python3-fedfind
+  tags:
+  - packages
+
+- name: Check out createhdds
+  git:
+    repo: https://pagure.io/fedora-qa/createhdds.git
+    dest: /root/createhdds
+
+- name: Set up createhdds cron job
+  copy: src=createhdds dest=/etc/cron.daily/createhdds owner=root group=root mode=0755
+
+- name: Check if any hard disk images need (re)building
+  command: "/root/createhdds/createhdds.py check"
+  args:
+    chdir: /var/lib/openqa/share/factory/hdd/fixed
+  register: diskcheck
+  failed_when: "1 != 1"
+  changed_when: "1 != 1"
+  check_mode: no
+
+- name: Ensure libvirt is running if needed to create images
+  service: name=libvirtd enabled=yes state=started
+  when: "diskcheck.rc > 1"
+
+# > 1 is not a typo; check exits with 1 if all images are present but some
+# are outdated, and 2 if any images are missing. We only want to handle
+# outright *missing* images here in the playbook (to handle the case of
+# first deployment). Outdated images are handled by the daily cron run.
+- name: Create hard disk images (this may take a long time!)
+  command: "/etc/cron.daily/createhdds"
+  when: "diskcheck.rc > 1"
+  ignore_errors: yes

roles/openqa/worker/tasks/main.yml

@@ -49,6 +49,9 @@
   tags:
   - config
 
+- include: createhdds.yml
+  when: "inventory_hostname in groups['openqa-hdds-workers']"
+
 - name: Enable and start worker services
   service: name=openqa-worker@{{ item }} enabled=yes state=started
   with_sequence: "count={{ openqa_workers }}"