ironic/doc/source/install/include/common-configure.rst

The Bare Metal service is configured via its configuration file. This file is typically located at /etc/ironic/ironic.conf.

Although some configuration options are mentioned here, it is recommended that you review all the available options so that the Bare Metal service is configured for your needs.

It is possible to set up an ironic-api and an ironic-conductor services on the same host or different hosts. Users also can add new ironic-conductor hosts to deal with an increasing number of bare metal nodes. But the additional ironic-conductor services should be at the same version as that of existing ironic-conductor services.