Ceph集群增加Mon时出错：

admin_socket: exception getting command descriptions: [Errno 2] No such file or directory
INFO:ceph-create-keys:ceph-mon admin socket not ready yet.
admin_socket: exception getting command descriptions: [Errno 2] No such file or directory
INFO:ceph-create-keys:ceph-mon admin socket not ready yet.

手动起一下
root@pve01://etc/pve/priv# /usr/bin/ceph-mon -f --cluster ceph --id pve01 --setuser ceph --setgroup ceph
2020-10-20 17:46:42.194667 7fb035114100 -1 error: monitor data filesystem reached concerning levels of available storage space (available: 4% 4.46GiB)
you may adjust 'mon data avail crit' to a lower value to make this go away (default: 5%)

看到原因了，，
mon 所在服务器，硬盘容量要求大于5%，，这个机器的根要满了，，删掉20g数据后，，启动正常