---
# A second instance of webapp, from the same payload.
#
# Demonstrates stack_src, stack_dest and stack_env together: one set of compose
# files, deployed twice to the same host under different directories with
# different settings. This is much better than a forked copy of the payload,
# which drifts the first time someone fixes a bug in only one of them.
#
# Staging deliberately has no backup-and-migrate phase. It is rebuilt from the
# same images and its data is disposable, so the whole two-phase apparatus in
# webapp.yml would be ceremony here.
- name: Deploy webapp staging
  hosts: app
  gather_facts: false
  tags: [webapp-staging]

  roles:
    - role: compose_stack
      vars:
        stack_name: webapp-staging
        # The same payload as the production instance.
        stack_src: "{{ repo_root }}/server/app/webapp"
        # ...deployed somewhere else. Without this, stack_dest would default to
        # {{ stack_root }}/webapp-staging, which happens to be right here, but
        # spelling it out is what makes the pairing with stack_src obvious.
        stack_dest: "{{ stack_root }}/webapp-staging"
        stack_networks:
          - proxy-net
        stack_files:
          - docker-compose.yml
        # Per-instance settings, merged into the compose environment on top of
        # PWD. The compose file reads these; nothing in the payload knows which
        # instance it is.
        stack_env:
          COMPOSE_PROJECT_NAME: webapp-staging