Failed to open some config files: /etc/ironic/ironic.conf

 6. docker logs ironic_inspector
 …
 INFO:__main__:Kolla config strategy set to: COPY_ALWAYS
 INFO:__main__:Loading config file at /var/lib/kolla/config_files/config.json
 INFO:__main__:Validating config file
 INFO:__main__:Copying service configuration files
 INFO:__main__:Removing existing destination: /etc/ironic/ironic.conf
 INFO:__main__:Copying /var/lib/kolla/config_files/ironic.conf to /etc/ironic/ironic.conf
 INFO:__main__:Setting permissions for /etc/ironic/ironic.conf
 INFO:__main__:Writing out command to execute
 Running command: 'ironic-inspector --config-file /etc/ironic/ironic.conf'
 Traceback (most recent call last):
   File "/usr/bin/ironic-inspector", line 10, in <module>
     sys.exit(main())
   File "/usr/lib/python2.7/dist-packages/ironic_inspector/main.py", line 441, in main
     service.run(args, app)
   File "/usr/lib/python2.7/dist-packages/ironic_inspector/main.py", line 423, in run
     self.setup_logging(args)
   File "/usr/lib/python2.7/dist-packages/ironic_inspector/main.py", line 350, in setup_logging
     CONF(args, project='ironic-inspector')
   File "/usr/lib/python2.7/dist-packages/oslo_config/cfg.py", line 2167, in __call__
     self._namespace._files_permission_denied)
 oslo_config.cfg.ConfigFilesPermissionDeniedError: Failed to open some config files: /etc/ironic/ironic.conf

 7. (ironic-inspector)[root@os ironic]# ls -ld /etc/ironic*
 drwxr-xr-x 4 ironic ironic 4096 Aug 5 17:02 /etc/ironic
 drwxr-x--- 3 ironic-inspector ironic-inspector 4096 Aug 5 16:59 /etc/ironic-inspector

 8. ls -l /etc/ironic/
 total 80
 -rw------- 1 root root 1128 Aug 5 17:02 ironic.conf
 -rw-r--r-- 1 ironic ironic 65181 Aug 5 11:45 ironic.conf.sample
 -rw-r--r-- 1 ironic ironic 115 Aug 5 11:45 policy.json
 -rw-r--r-- 1 ironic ironic 995 Aug 5 11:45 rootwrap.conf
 drwxr-xr-x 2 ironic ironic 4096 Aug 5 11:45 rootwrap.d

 9. ironic_conductor for comparison:
 (ironic-conductor)[ironic@os /]$ ls -l /etc/ironic/
 total 80
 -rw------- 1 ironic ironic 963 Aug 5 15:45 ironic.conf
 -rw-r--r-- 1 ironic ironic 65181 Aug 5 11:45 ironic.conf.sample
 -rw-r--r-- 1 ironic ironic 115 Aug 5 11:45 policy.json
 -rw-r--r-- 1 ironic ironic 995 Aug 5 11:45 rootwrap.conf
 drwxr-xr-x 2 ironic ironic 4096 Aug 5 11:45 rootwrap.d

FIX (changing owner root->ironic):
root@os:/etc/kolla/ironic-inspector# cat config.json
{
    "command": "ironic-inspector --config-file /etc/ironic/ironic.conf",
    "config_files": [
        {
            "source": "/var/lib/kolla/config_files/ironic.conf",
            "dest": "/etc/ironic/ironic.conf",
            "owner": "ironic",
            "perm": "0600"
        }
    ]
}