--- application_stack: components: database: - id: database1 host: host1 - id: database2 host: host2 app_server: - id: app_server1 host: host3 database: - database1 - database2 - id: app_server2 host: host4 database: - database2 web_server: - id: web_server1 host: host1 database: - database1 - database2 app_server: - app_server1 - app_server2 - id: web_server2 host: host2 database: - database1 app_server: - app_server2 load_balancer: - id: load_balancer1 host: host1 web_server: - web_server1 - id: load_balancer2 host: host1 web_server: - web_server2 frontend: - load_balancer1