[ceph-users] Questions on Ceph cluster without OS disks

Hello， Martin， I notice that Croit advocate the use of ceph cluster without OS disks, but with PXE boot. Do you use a NFS server to serve the root file system for each node? such as hosting configuration files, user and password, log files, etc. My question is, will the NFS server be a single point of failure? If the NFS server goes down, the network experience any outage, ceph nodes may not be able to write to the local file systems, possibly leading to service outage. How do you deal with the above potential issues in production? I am a bit worried... best regards, samuel huxiaoyu@horebdata.cn