---
- hosts: undercloud
  vars:
    metadata:
      name: Verify existence of deployment images
      description: >
        This validation checks that images bm-deploy-kernel and
        bm-deploy-ramdisk exist before deploying the overcloud,
        and that only one exists by that name.
      groups:
      - pre-deployment
      - pre-upgrade
    deploy_kernel_name: "bm-deploy-kernel"
    deploy_ramdisk_name: "bm-deploy-ramdisk"
  tasks:
  - name: Fetch deploy kernel by name
    set_fact:
      deploy_kernel_id: "{{ lookup('glance_images', 'name', ['{{ deploy_kernel_name }}'], wantlist=True) | map(attribute='id') | list }}"
  - name: Fetch deploy ramdisk by name
    set_fact:
      deploy_ramdisk_id: "{{ lookup('glance_images', 'name', ['{{ deploy_ramdisk_name }}'], wantlist=True) | map(attribute='id') | list }}"
  - name: Fail if image is not found
    fail: msg="No image with the name '{{ item.name }}' found - make sure you have uploaded boot images."
    failed_when: item.id | length < 1
    with_items:
      - { name: '{{deploy_kernel_name}}', id: '{{deploy_kernel_id}}' }
      - { name: '{{deploy_ramdisk_name}}', id: '{{deploy_ramdisk_id}}' }
  - name: Fail if there is more than one image
    fail: msg="Please make sure there is only one image named '{{ item.name }}' in glance."
    failed_when: item.id | length > 1
    with_items:
      - { name: '{{deploy_kernel_name}}', id: '{{deploy_kernel_id}}' }
      - { name: '{{deploy_ramdisk_name}}', id: '{{deploy_ramdisk_id}}' }