Is it possible to install CentOS on a pre-allocated RAID (md)?

Question

linux

Hello
Sir, please help me with the problem. I want to install CentOS on a software RAID 1 (md), but the CentOS 7.3 installer offers me some wild configuration - it creates a RAID array for each created mount point. Let's say the RAID is built from 2 disks and I create /var as RAID1 - the installer will create two LVM partitions on each disk and build RAID1 from them. And so with each section, but in the end I have 4-5 arrays.
There is no such problem in the Debian installer - I created a RAID of the desired configuration, pulled LVM over it, partitioned LVM into partitions and mounted them. As a result - one array, one VG and a lot of LVM, everything is as it should be.
Anaconda, on the other hand, if I create a RAID in advance using mdadm, it simply does not allow it to be used, displaying it, but marking all the fields in gray.

Answer 1

https://wiki.centos.org/HowTos/ManualInstall