I had a problem with creating PersistenBufferFile on AlmaLinux, SeLinux kept blocking me, to fix this problem I had to create a separate policy for the Buffer file.

Steps to reproduce:

1. Config:

   BufferSize=1024
   EnablePersistentBuffer=1
   PersistentBufferPeriod=1h
   PersistentBufferFile=/var/lib/zabbix/buffer.db
   

2. Selinux labels:

   system_u:object_r:zabbix_var_lib_t:s0 /var/lib/zabbix/buffer.db
   

   Result:

   Cannot prepare result cache: remove /var/lib/zabbix/buffer.db: permission denied.
   Cannot prepare result cache: remove /var/lib/zabbix/buffer.db: no such file or directory.
   

   Expected:

Fix:

module zabbix_buffer_fix 1.0;

require {
        type zabbix_agent_t;
        type zabbix_var_lib_t;
        class file \{ create lock open read unlink write };
        class dir \{ add_name remove_name write };
}

#============= zabbix_agent_t ==============

allow zabbix_agent_t zabbix_var_lib_t:dir \{ add_name remove_name write };

allow zabbix_agent_t zabbix_var_lib_t:file \{ lock open read unlink write };
allow zabbix_agent_t zabbix_var_lib_t:file create;