Warning: This is the point of no return. Once the disks are wiped, the node must be rebuilt.
All commands in this section must be run on the node being rebuilt (unless otherwise indicated). These commands can be done from the ConMan console window.
Only follow the steps in the section for the node type that is being rebuilt:
Unmount the etcd volume and remove the volume group.
NOTE: etcd should already be stopped as part of the “Prepare Master Node” steps.
/run/lib-etcd
vgremove -f etcdvg0-ETCDK8S
Unmount the SDU mountpoint and remove the volume group.
umount /var/lib/sdu
vgremove -f metalvg0-CRAYSDU
Wipe the drives
mdisks=$(lsblk -l -o SIZE,NAME,TYPE,TRAN | grep -E '(sata|nvme|sas)' | sort -h | awk ' {print "/dev/" $2}')
wipefs --all --force $mdisks
Stop containerd and wipe drives.
systemctl stop containerd.service
Unmount partitions.
umount /var/lib/kubelet
umount /run/lib-containerd
umount /run/containerd
Wipe Drives
wipefs --all --force /dev/sd* /dev/disk/by-label/*
Stop running OSDs on the node being wiped
ncn-s# systemctl stop ceph-osd.target
Make sure the OSDs (if any) are not running after running the first command.
ncn-s# ls -1 /dev/sd* /dev/disk/by-label/*
ncn-s# vgremove -f --select 'vg_name=~ceph*'
Unmount and remove the metalvg0 volume group
umount /etc/ceph
umount /var/lib/ceph
umount /var/lib/containers
vgremove -f metalvg0
Wipe the disks and RAIDs.
wipefs --all --force /dev/sd* /dev/disk/by-label/*