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 /configuration/sample-config 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.