app.wsgi script is deprecated for long in ironic in favor of ironic-api-wsgi script, the deprecated script is now removed in [1]. Let's use ironic-api-wsgi script as a wsgi_script_source path. [1] https://review.opendev.org/#/c/668515/ Change-Id: I08016ca7b82e6987a341ffb8e3c0e5bfc872e46f