We just had to restart sssd on a large number of machines because we had a period of DNS
failure. We’re using IPA as the backend. Faiures occurred on Centos 7 and 8 and Ubuntu
18.
I don’t necessarily expect everything to work when DNS is dead, but I did expect it t
recover.
For the moment we’re adding entries to /etc/hosts on all of our systems for the IPA
servers and our main file servers. Unfortunately DNS is run by the campus, so it’s not
under our control.