Requirements

• iSCSI Client

  sudo dnf install iscsi-initiator-utils -y
  sudo systemctl enable --now iscsid
  systemctl status iscsid
  

• Setup Hugepages

  echo 1024 | sudo tee /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages
  echo vm.nr_hugepages = 1024 | sudo tee -a /etc/sysctl.conf
  

• Label Nodes

  kubectl label node alex-cloud-sn-1 openebs.io/engine=mayastor &&
  kubectl label node alex-cloud-sn-2 openebs.io/engine=mayastor &&
  kubectl label node alex-cloud-sn-3 openebs.io/engine=mayastor
  

• Opened Ports

  sudo firewall-cmd --zone=public --permanent --add-port=10124/tcp
  sudo firewall-cmd --zone=public --permanent --add-port=8420/tcp
  sudo firewall-cmd --zone=public --permanent --add-port=4421/tcp
  sudo firewall-cmd --reload
  

• ZFS Installed

  dnf install <https://zfsonlinux.org/epel/zfs-release-2-2$>(rpm --eval "%{dist}").noarch.rpm -y
  dnf install zfs -y
  
  /sbin/modprobe zfs
  echo zfs > /etc/modules-load.d/zfs.conf
  

• NVMe-TCP installed

  dnf install nvme-cli kernel-modules-extra -y &&
  modprobe nvme-tcp
  
  echo nvme-tcp > /etc/modules-load.d/nvme.conf
  

The targeted device has to be ext4!

mkfs.ext4 /dev/sda2

Remove CRD

kubectl delete crd lvmnodes.local.openebs.io &&
kubectl delete crd lvmsnapshots.local.openebs.io &&
kubectl delete crd lvmvolumes.local.openebs.io &&
kubectl delete crd zfsbackups.zfs.openebs.io &&
kubectl delete crd zfsnodes.zfs.openebs.io &&
kubectl delete crd zfsrestores.zfs.openebs.io &&
kubectl delete crd zfssnapshots.zfs.openebs.io &&
kubectl delete crd zfsvolumes.zfs.openebs.io &&
kubectl delete crd volumesnapshotclasses.snapshot.storage.k8s.io &&
kubectl delete crd volumesnapshotcontents.snapshot.storage.k8s.io &&
kubectl delete crd volumesnapshots.snapshot.storage.k8s.io

Optimize

echo vm.swappiness=10 | sudo tee -a /etc/sysctl.conf
echo net.ipv4.tcp_tso_win_divisor=16 | sudo tee -a /etc/sysctl.conf
sudo sysctl -p

Delete volumes manually