dc-deployments-automation/roles/fetch_backups/tasks/main.yml

---

# This role will attempt to fetch and load the backup manifest from a
# remote HTTP or S3 URL. On successful completion the contents of JSON
# or YAML document will be in the var `atl_backup_manifest`.

- block:

    - name: Ensure temp directory is present
      file:
        path: "{{ atl_installer_temp }}"
        state: directory
        mode: 0750
        owner: "{{ atl_product_user }}"
        group: "{{ atl_product_user }}"
      changed_when: false  # For Molecule idempotence check

    - name: Parse the manifest URL
      set_fact:
        atl_backup_manifest_url: "{{ atl_backup_manifest_url | urlsplit }}"

    - name: Extract manifest file information
      set_fact:
        atl_backup_manifest_bucket: "{{ atl_backup_manifest_url.hostname }}"
        atl_backup_manifest_path: "{{ atl_backup_manifest_url.path }}"
        atl_backup_manifest_dest: "{{ atl_installer_temp }}/{{ atl_backup_manifest_url.path | basename }}"

    - name: Fetch the manifest from S3
      aws_s3:
        mode: get
        overwrite: different
        bucket: "{{ atl_backup_manifest_bucket }}"
        object: "{{ atl_backup_manifest_path }}"
        dest: "{{ atl_backup_manifest_dest }}"
      when: atl_backup_manifest_url.scheme == 's3'

    - name: Fetch the manifest from remote host
      get_url:
        url: "{{ atl_backup_manifest_url }}"
        dest: "{{ atl_backup_manifest_dest }}"
      when: atl_backup_manifest_url.scheme != 's3'

    # FIXME: The manifest format is still undecided; everything
    # referencing this variable should be considered a placeholder.
    - name: Load parameters from manifest
      include_vars:
        file: "{{ atl_backup_manifest_dest }}"
        name: atl_backup_manifest

    - name: Define the DB and home dump destinations
      set_fact:
        atl_backup_db_dest: "{{ atl_installer_temp }}/{{ atl_backup_manifest.db_dump | basename }}"
        atl_backup_home_dest: "{{ atl_installer_temp }}/{{ atl_backup_manifest.shared_home_dump | basename }}"

    # FIXME: Here we fetch the backups. However we may wish to stream
    # these directly from S3 to the target DB/FS to avoid requiring
    # disk-space for the intermediate files.
    - name: Fetch DB backup from S3
      aws_s3:
        mode: get
        overwrite: different
        bucket: "{{ atl_backup_manifest.db_dump | urlsplit('hostname') }}"
        object: "{{ atl_backup_manifest.db_dump | urlsplit('path') }}"
        dest: "{{ atl_backup_db_dest }}"

    - name: Fetch Home backup from S3
      aws_s3:
        mode: get
        overwrite: different
        bucket: "{{ atl_backup_manifest.shared_home_dump | urlsplit('hostname') }}"
        object: "{{ atl_backup_manifest.shared_home_dump | urlsplit('path') }}"
        dest: "{{ atl_backup_home_dest }}"

    - name: Install distro-specific restore support packages
      include_tasks: "{{ ansible_distribution|lower }}.yml"

  when: atl_backup_manifest_url is defined and atl_backup_manifest_url != ''