To host NFS and NFS subdir external provisioner

Purpose

Perform these procedures to:

  • Configure the NFS server

  • Automatically provision existing NFS servers to support dynamic provisioning of Kubernetes persistent volumes (PVs) through PVCs on an NSP cluster node

See RWX storage class example and RWO storage class example for examples of values.yaml for RWX and RXO storage classes.

Steps
Configure NFS Server
 
1 

Create a RHEL instance.

2 

If the nfs-utils package is not installed, enter the following command:

# yum install nfs-utils ↵

3 

Enter the following commands:

# sudo mkdir -p /nsp/nfs/data ↵

# sudo chown root:root /nsp/nfs/data ↵

# sudo chmod 777 /nsp/nfs/data ↵

4 

Open the following file using a plain-text editor such as vi:

/etc/exports

5 

Add the following line:

/nsp/nfs/data     *(rw,sync,no_root_squash,no_all_squash) 

6 

Enter the following command:

exportfs -rv ↵

7 

Enter the following commands to start NFS service:

  1. Enter the following command:

    # sudo systemctl start nfs-server ↵

  2. Enter the following command:

    # sudo systemctl enable nfs-server ↵

  3. Enter the following command:

    # sudo firewall-cmd --permanent --add-service=nfs ↵

  4. Enter the following command:

    # sudo firewall-cmd --reload ↵

  5. Enter the following command:

    # sudo systemctl status nfs-server ↵

  6. Enter the following command:

    # showmount -e localhost ↵

Deploy dynamic NFS provisioning in Kubernetes on an NSP cluster node
 
8 

Log in as the root user to NSP cluster member node1.

9 

Navigate to a temporary directory:

# cd tmp_dir ↵

where tmp_dir is the name of the temporary directory, for example, /opt/nsp.

10 

Enter the following command:

# mkdir -p tmp_dir/nfs-subdir-external-provisioner ↵

11 

Enter the following command:

# cd tmp_dir/nfs-subdir-external-provisioner ↵

12 

Enter the following command:

# git clone https://github.com/kubernetes-sigs/nfs-subdir-external-provisioner.git ↵

13 

Enter the following command:

# cd nfs-subdir-external-provisioner/charts/nfs-subdir-external-provisioner/ ↵

14 

Enter the following commands on node1 to create the storage classes:

  1. Create the rwx storage class:

    1. Update values.yaml; see RWX storage class example.

    2. Enter the following command:

      # helm install nfs-subdir-external-provisioner-rwx . ↵

  2. Create the rwo storage class:

    1. Update values.yaml; see RWO storage class example.

    2. Enter the following command:

      # helm install nfs-subdir-external-provisioner-rwo . ↵

15 

Enter the following command on the node where nfs-subdir-external-provisione is scheduled:

# nerdctl pull registry.k8s.io/sig-storage/nfs-subdir-external-provisioner:v4.0.2 ↵

16 

Provision the following storage classes in nsp-config.yml before installing NSP.

# kubectl get sc ↵

NAME            PROVISIONER     RECLAIMPOLICY  VOLUMEBINDINGMODE  ALLOWVOLUMEEXPANSION  AGE

nfs-client-rwo  nfs-client-rwo  Delete         Immediate          true                  88m

nfs-client-rwx  nfs-client-rwx  Delete         Immediate          true                  83m

17 

Install NSP after the pod is up and running on the NSP cluster node.

#kubectl get pods -A | grep nfs ↵

default  nfs-subdir-external-provisioner-rwo-6bf9557478-ljfqt  1/1  Running  0  78m

default  nfs-subdir-external-provisioner-rwx-d5695df57-4z4q8   1/1  Running  0  73m

End of steps