How to fix selinux so that it correctly places contexts for /usr/local/?

Question

System administration

I deployed a VM from the CentOS 7 distribution, installed Nagios on it, in the process of debugging errors I found that nagios was installed in /usr/local, and the context of the nagios files was unconfined_u:object_r:usr_t - i.e. default for hosting (inherited from /usr/local?). Well, as a result, sending commands to Nagiosu from the web muzzle does not work. The analysis showed, among other things, the absence of the /etc/selinux/targeted/contexts/files/file_contexts.local file (there is file_contexts nearby, apparently from other directories). What to treat?