[ceph-users] New cephadm install, OSD down after a few hours

Hello, I'm new to ceph and setting up my first cluster and playing around with it. I followed the steps in cephadm guide ( https://docs.ceph.com/en/latest/cephadm/install/) Here is my implementation of the instructions, from a Ubuntu Server 20.04.1 install: sudo apt-get update && sudo apt-get dist-upgrade -y sudo apt-get install curl git nano docker docker-compose docker.io attr ntp bash-completion -y sudo usermod -aG docker $USER curl --silent --remote-name --location https://github.com/ceph/ceph/raw/octopus/src/cephadm/cephadm chmod +x cephadm sudo ./cephadm add-repo --release octopus sudo ./cephadm install sudo mkdir -p /etc/ceph sudo cephadm install ceph-common ceph sudo cephadm bootstrap --mon-ip <IP> ceph orch daemon add server-node1:/dev/sda ceph orch daemon add server-node1:/dev/sdc ceph orch daemon add server-node1:/dev/sdd ceph orch daemon add server-node1:/dev/sde ceph orch daemon add server-node1:/dev/sdf Then I log into the ceph dashboard, change password, click around. Take a break... ...HOURS Later... My OSDs are down. I notice this in ceph-volume.log: [ceph_volume.main][INFO ] Running command: ceph-volume lvm deactivate 1 7a0fb8df-2d12-4e96-9def-5b2c195f6af4 So I run: ceph-volume lvm activate --all And my OSDs are back and 'cephadm ls' shows them as legacy. However, running 'cephadm adopt --style legacy --name osd.0' causes the osd to go down again. What is going on? PS: The only two other issues I in the logs see are /usr/bin/docker:stderr Error: No such object: ceph-<ID>-osd.0 and [ceph_volume.util.system][INFO ] /var/lib/ceph/osd/ceph-0 does not appear to be a tmpfs mount Jie