Note: The code from this repository has been migrated to https://github.com/openebs/jiva-operator

jiva-csi

Overview

Jiva CSI driver implements the csi-spec for the provision and deprovision of the OpenEBS Jiva volumes on kubernetes.

Jiva CSI driver comprises of 2 components:

• A controller component launched as a StatefulSet, implementing the CSI controller services. The Control Plane services are responsible for creating/deleting the required OpenEBS Volume.
• A node component that runs as a DaemonSet, implementing the CSI node services. The node component is responsible for performing the iSCSI connection management and connecting to the OpenEBS Volume.

Quick Start

Prerequisites

1. Kubernetes version 1.14 or higher
2. OpenEBS Version 1.5 or higher installed. The steps to install OpenEBS are here
3. jiva-operator must be installed. The steps to install jiva-operator is here
4. iSCSI initiator utils installed on all the worker nodes
5. You have access to install RBAC components into kube-system namespace. The Jiva CSI driver components are installed in kube-system namespace to allow them to be flagged as system critical components.

Installation

Run following commands to proceed with the installation:

• For Ubuntu 16.04.

  kubectl apply -f https://raw.githubusercontent.com/openebs/jiva-csi/master/deploy/jiva-csi-ubuntu-16.04.yaml
  

• For Ubuntu 18.04

  kubectl apply -f https://raw.githubusercontent.com/openebs/jiva-csi/master/deploy/jiva-csi.yaml
  

Verify that the Jiva CSI Components are installed.

$ kubectl get pods -n kube-system -l role=openebs-csi
NAME                            READY   STATUS    RESTARTS   AGE
openebs-jiva-csi-controller-0   4/4     Running   0          6m14s
openebs-jiva-csi-node-56t5g     2/2     Running   0          6m13s

Provision a Jiva volume

1. Create Jiva volume policy to set various policies for creating jiva volume. Though this is optional as there are already some default values are set for some field like replicaSC, replicationFactor etc with default value openebs-hostpath and 3 respectively. A sample jiva volume policy CR looks like:

    apiVersion: openebs.io/v1alpha1
    kind: JivaVolumePolicy
    metadata:
      name: example-jivavolumepolicy
      namespace: openebs
    spec:
      replicaSC: openebs-hostpath
      enableBufio: false
      autoScaling: false
      target:
        # monitor: false
        replicationFactor: 1
        # auxResources:
        # tolerations:
        # resources:
        # affinity:
        # nodeSelector:
        # priorityClassName:
      # replica:
        # tolerations:
        # resources:
        # affinity:
        # nodeSelector:
        # priorityClassName:
   

2. Create a Storage Class to dynamically provision volumes using jiva-csi driver. A sample storage class looks like:

   apiVersion: storage.k8s.io/v1
   kind: StorageClass
   metadata:
     name: openebs-jiva-csi-sc
   provisioner: jiva.csi.openebs.io
   parameters:
     cas-type: "jiva"
     policy: "example-jivavolumepolicy"
   

3. Create PVC by specifying the above Storage Class in the PVC spec

   kind: PersistentVolumeClaim
   apiVersion: v1
   metadata:
     name: jiva-csi-demo
   spec:
     storageClassName: openebs-jiva-csi-sc
     accessModes:
       - ReadWriteOnce
     resources:
       requests:
         storage: 4Gi
   

4. Deploy your application by specifying the PVC name

   apiVersion: apps/v1
   kind: Deployment
   metadata:
     name: fio
   spec:
     selector:
       matchLabels:
         name: fio
     replicas: 1
     strategy:
       type: Recreate
       rollingUpdate: null
     template:
       metadata:
         labels:
           name: fio
       spec:
         nodeName: gke-utkarsh-csi-default-pool-953ba289-rt9l
         containers:
         - name: perfrunner
           image: openebs/tests-fio
           command: ["/bin/bash"]
           args: ["-c", "while true ;do sleep 50; done"]
           volumeMounts:
         - mountPath: /datadir
           name: fio-vol
         volumes:
         - name: fio-vol
           persistentVolumeClaim:
             claimName: jiva-csi-demo