validate.yml

- name: Perform pre-deployment validations
  hosts: localhost
  gather_facts: yes
  any_errors_fatal: true
  tasks:

      - name: "Install/Upgrade are mutually exclusive"
        fail:
            msg: "Options '--deploy' and '--upgrade' and '--ocupdate' are mutually exclusive"
        when:
            - ( install.deploy|default('') and install.upgrade|default('')) or
              ( install.deploy|default('') and install.ocupdate|default(False)) or
              ( install.upgrade|default('') and install.ocupdate|default(False))

      - name: validate storage nodes
        fail:
            msg: "To many storage nodes to discover storage backend. Provide --storage-backend cli option with the backend to use. "
        when:
            - install.deploy|default('')
            - not (install.storage|default({})).backend|default(False)
            - "'swift' in groups"
            - "'ceph' in groups"

      - name: set default storage config file location
        set_fact:
          install_storage_config_file: "vars/storage/config/{{ install.storage.config }}.yml"

      - when:
          - install.deploy|default('')
          - install.storage.external
        block:
          - name: validate storage-config option is provided
            fail:
                msg: "The --storage-config cli option should be provided for external storage backend when --storage-external is used. "
            when:
                - install.storage.config == 'internal'

          - name: download storage config file
            get_url:
              url: "{{ install.storage.config }}"
              dest: ./storage-config.yml.tmp
              force: yes
            when: install.storage.config is match("http[s]?://.*")

          - name: lookup for external storage config
            set_fact:
              install_storage_config_file: "{{ lookup('first_found', findme) }}"
            vars:
              findme:
              - ./storage-config.yml.tmp
              - "{{ install.storage.config }}"
              - "vars/storage/config/{{ install.storage.config }}.yml"

      - debug: msg="install_storage_config_file set to {{ install_storage_config_file }}"

- name: Perform pre-deployment validations on undercloud
  hosts: undercloud
  gather_facts: no
  any_errors_fatal: true
  tasks:

      - name: validate and copy environment plan file
        include_tasks: tasks/environment_plan.yml
        when: (install.environment|default({})).plan|default(false)