csi

CSI Local Driver setup

I've spec'd out my NUC with a 1TB Western Digital SATA SSD, which gets assigned the device /dev/sda. I use Ignition to partition, create filesystems, and mount the device.

Manual Disk partitioning

To manually create the disk partitions and mount them, you can run:

# Partition disk manually
sudo parted -s -a opt --script /dev/sda \
    mklabel gpt \
    mkpart primary 0 10G \
    mkpart primary 10G 20G \
    mkpart primary 20G 35G \
    mkpart primary 35G 50G \
    mkpart primary 50G 75G \
    mkpart primary 75G 100G \
    mkpart primary 100G 150G \
    mkpart primary 150G 200G \
    mkpart primary 200G 250G \
    mkpart primary 250G 350G \
    mkpart primary 350G 500G \
    mkpart primary 500G 1000G \
    align-check min 1 

for i in {1..12} ; do
  # Create file system
  sudo mkfs -t ext4 /dev/sda$i
  # Create mount points
  sudo mkdir -p /mnt/csi-local-storage/p$i
  # mount partition
  sudo mount /dev/sda$i /mnt/csi-local-storage/p$i
done

# TODO: add to mtab/fstab

Install the Kubernetes CSI local static provisioner

You can read the K8s blog post for a full explanation and walk-through, but basically to get local persistent Kubernetes volumes, you have to:

• Create a StorageClass for local disks
• Mount your disks into a directory on the host filesystem
• Run the provisioner as a DaemonSet and specify the mount directory

Do all that, and the provisioner will create Kubernetes Persistent Volumes (PVs) that can be claimed by Persistent Volume Claims (PVCs) for pods.

To setup the provisioner, run:

git clone --depth=1 https://github.com/kubernetes-sigs/sig-storage-local-static-provisioner.git
# I use my own values here, you can use yours
helm template csi-local-provisioner \
    --namespace kube-system \
    ./sig-storage-local-static-provisioner/helm/provisioner \
    --values local-values.yaml > local-volume-provisioner.generated.yaml
kubectl apply -f local-volume-provisioner.generated.yaml