NFS Provisioner Role

The nfs-provisioner role will configure a Qubinode device to use NFS for OpenShift persistant storage. It configures the Kubernetes NFS-Client Provisioner and setup up the OpenShift internal registry to use a NFS backed PVC.

The nfs-provisioner configure the Qubinode as NFS server.

Requirements

This role is intended to be executed on a Qubinode.

Understanding OpenShift Persistent Storage Types

Access Mode	CLI Abbreviation	Description
ReadWriteOnce	RWO	The volume can be mounted as read-write by a single node.
ReadOnlyMany	ROX	The volume can be mounted as read-only by many nodes.
ReadWriteMany	RWX	The volume can be mounted as read-write by many nodes.

Supported Access modes For PVs

Volume Plug-in	ReadWriteOnce	ReadOnlyMany	ReadWriteMany targetserver
AWS EBS	✔️	❌	❌
Azure File	✔️	✔️	✔️
Azure Disk	✔️	❌	❌
Cinder	✔️	❌	❌
Fibre Channel	✔️	✔️	❌
GCE Persistent Disk	✔️	❌	❌
HostPath	✔️	❌	❌
iSCSI	✔️	✔️	❌
Local volume	✔️	❌	❌
NFS	✔️	✔️	✔️
VMware vSphere	✔️	❌	❌

Role Variables

Type	Description	Default Value
use_token	Using login token to connect to OpenShift Cluster.	true
provision_nfs_server	Install and configure nfs server packages	true
nfs_server_directory_path	Set Directory path of nfs storage	/exports
provision_nfs_client_provisoner	Configure the nfs-provisioner container on OpenShift	true
configure_registry	Configure Registry with nfs-provisioner storage	false
nfs_server_ip	Set the ip address of the nfs server	192.168.1.2
registry_pvc_size	Configure the default size of regisitry	100Gi
kubeconfig_dir location of auth/kubeconfig	"/home/qubi/qubinode-installer/ocp4"
nfs_project_namespace	OpenShift Project name for the nfs-provisioner	nfs-provisioner
nfs_provisioner_rbac_object_file	default path of yaml file	"/usr/local/src/nfs-provisioner-rbac.yaml"
nfs_provisioner_deploy_loc	default path of yaml file	"/usr/local/src/nfs-provisioner-deployment.yaml"
nfs_provisioner_sc_object_file	default path of yaml file	"/usr/local/src/nfs-provisioner-sc.yaml"
storage_class_name	default storage class name	nfs-storage-provisioner
nfs_registry_pvc_object_file	default path of yaml file	"/usr/local/src/registry-pvc.yaml"
delete_deployment	delete the deployment and project for nfs-provisioner	false
insecure_skip_tls_verify	Skip insecure tls verify	true

Dependencies

• Ansible
• OpenShift cli

Example Playbook

Example using token to deploy to nfs-provisioner OpenShift

- hosts: localhost
  become: yes
  vars:
    use_token: true
    provision_nfs_server: true
    nfs_server_directory_path: /export
    provision_nfs_provisoner: true
    configure_registry: true
    nfs_server_ip:  changeme
    registry_pvc_size: 100Gi
    storage_class_result: true
    openshift_token: 1234567890
    openshift_url: https://master.example.com:6443 #https://master.example.com for openshift 3
    openshift_version: ocp4
    project_namespace: nfs-provisioner
    set_as_default: true
    delete_deployment: false
    insecure_skip_tls_verify: true
  roles:
  - nfs-provisioner-role

Example using kubeconfig to deploy to nfs-provisioner OpenShift

    - hosts: targetserver
      become: yes
      vars:
        provision_nfs_server: true
        nfs_server_directory_path: /export
        provision_nfs_client_provisoner: true
        configure_registry: false
        nfs_server_ip:  changeme
        registry_pvc_size: 100Gi
        storage_class_result: true
        kubeconfig_dir: "/home/qubi/qubinode-installer/ocp4"
        openshift_version: ocp4
        nfs_project_namespace: nfs-provisioner
        delete_deployment: false
        insecure_skip_tls_verify: true
      roles:
      - nfs-provisioner-role

License

GPLv3

Author Information

This role was created in 2019 by Tosin Akinosho