[ceph-users] Failover with 2 nodes

Hi, I'm building a lab with virtual machines. I build a set up with only 2 nodes, 2 osd per nodes and I have a host that use mount.cephfs Each 2 ceph nodes runs services mon + mgr + mds and has cephadm command. If I stop a node, all commands hang. Can't use dashboard, can't use ceph -s or any ceph command, and my cephfs on the third host stop to respond too (ex: with ls command) All come back, when I power on the stopped node Why is there no failover ?? Thanks you 'Jof