I don't know anything about DAOS so I can't comment on that. Have you had this working in the past and it stopped working, or are you trying to get it running now? Either way, CentOS 7 was initially released in 2014, and goes EOL at the end of the month. What you *might* be seeing is that C7 doesn't support the infrastructure needed for DAOS. This would probably be better answered in a forum dedicated to DAOS. In any case, given the short support lifetime of C7, I'd recommend you consider moving to something more recent, like CentOS 9 or one of the other RHEL 9 based distros. I hear good things about Rocky Linux. Or move to Ubuntu or Debian.
"A little song, a little dance, a little seltzer down your pants" Chuckles the clown