Quobyte CSI

Quobyte CSI is the implementation of Container Storage Interface (CSI). Quobyte CSI enables easy integration of Quobyte Storage into Kubernetes. Current Quobyte CSI driver supports the following functionality

• Dynamic Volume Create
• Volume Delete
• Pre-provisioned volumes (Delete policy does not apply to these volumes)
• Volume Expansion (Only dynamically provisioned volumes can be expanded)
  • Quobyte supports volumes with unlimited size, expanding an unlimited sized volume restricts the volume size to expanded size.
• Volume snapshots

Select Quobyte CSI Driver Release

1. Choose a Quobyte CSI release from available releases

2. Follow the instructions specific to that release

Index

• Requirements
• Deploy Quobyte clients
  • Quobyte 2.x
  • Quobyte 3.x
• Deploy Quobyte CSI
• Quobyte Version Compatibility
• Snapshotter Setup (required only if snapshots are enabled)
• Usage Examples
  • Use Quobyte volumes in Kubernetes
    • Dynamic volume provisioning
    • Use existing volumes
  • Volume Snapshots
    • Dynamic Snapshots
    • Pre-provisioned Snapshots
  • Shared Volumes
• Update Quobyte CSI or Client
  • Update Quobyte CSI Driver
  • Update Quobyte Client
    • Application pod recovery
• Harden Access with Quobyte Access Keys (requires Quobyte 3.1 or later)
• Uninstall Quobyte CSI
• Quobyte Client Upgrade Example
• Multi-cluster setup
• Collect Quobyte CSI logs
• Run e2e tests on kind cluster

Requirements

• Requires Helm and kubectl
• Requires at least Kubernetes v1.22
• Quobyte installation with reachable registry and api services from the Kubernetes nodes and pods
• Quobyte client with mount path as <values.clientMountPoint>/mounts. Please see Deploy Quobyte clients for Quobyte client installation instructions.
  • To use Quobyte access keys, the Quobyte client (requires Quobyte version 3.0 or above) should be deployed with --enable-access-contexts. Additionally, the metadata cache (global policy) should be disabled.
• If you have load balancer for Quobyte API, the load balancer must be configured with sticky sessions.
• Requires additional setup to use volume snapshots

Deploy Quobyte CSI Driver

Note: Quobyte CSI driver automatically deletes all the application pods with stale Quobyte CSI volumes and leaves the new pod creation to kubernetes. To reschedule a new pod automatically by k8s, applications should be deployed with Deployment/ReplicaSet/StatefulSets but not as a plain Pod.

1. Add quobyte-csi-driver helm repository to your helm repos

   helm repo add quobyte-csi-driver https://quobyte.github.io/quobyte-csi-driver/helm

   If the quobyte-csi-driver helm repo already exists in your helm repositories, you should update the repo to get the new Quobyte CSI Driver releases. Update the repo

   helm repo update quobyte-csi-driver

2. List all available Quobyte CSI versions

   helm search repo quobyte-csi-driver/quobyte-csi-driver -l

3. List all customization options for Quobyte CSI driver

   helm show values quobyte-csi/quobyte-csi [--version <chart-version>] # or use other "show <subcommands>"

4. Edit Quobyte CSI driver configuration (./quobyte-csi-driver/values.yaml) and configure CSI driver with Quobyte API, other required information.

5. (optional) generate driver deployment .yaml and verify the configuration.

   helm template ./quobyte-csi-driver --debug > csi-driver.yaml

6. Deploy the Quobyte CSI driver with customizations

   # Deploys helm chart with name "quobyte-csi".
   # Please change quobyte-csi as required
   helm install quobyte-csi quobyte-csi-driver/quobyte-csi-driver [--version <chart-version>]
     \ --set quobyte.apiURL="<your-api-url>" ....

   or

   helm install quobyte-csi quobyte-csi-driver/quobyte-csi-driver [--version <chart-version>]
     \ -f <your-customized-values.yaml> [--set quobyte.apiURL="<your-api-url>" .. other overrides]

7. Verify the status of Quobyte CSI driver pods

   Deploying Quobyte CSI driver should create a CSIDriver object with your csiProvisionerName (this may take few seconds)

   CSI_PROVISIONER="<YOUR-csiProvisionerName>"
   kubectl get CSIDriver | grep ^${CSI_PROVISIONER}

   The Quobyte CSI driver is ready for use, if you see quobyte-csi-controller-x pod running on any one node and quobyte-csi-node-xxxxx running on every node of the Kubernetes cluster.

   CSI_PROVISIONER=$(echo $CSI_PROVISIONER | tr "." "-")
   kubectl -n kube-system get po -owide | grep ^quobyte-csi-.*-${CSI_PROVISIONER}

8. Make sure your CSI driver is running against the expected Quobyte API endpoint

   kubectl -n kube-system exec -it \
   "$(kubectl get po -n kube-system | grep -m 1 ^quobyte-csi-node-$CSI_PROVISIONER \
   |  cut -f 1 -d' ')" -c quobyte-csi-driver -- env | grep QUOBYTE_API_URL

   The above command should print your Quobyte API endpoint. Otherwise, uninstall Quobyte CSI driver and install again with the correct Quobyte API URL.

Examples

Note: k8s storage class is immutable. Do not delete existing definitions, such a deletion could cause issues for existing PV/PVCs.

Use Quobyte volumes in Kubernetes

Note: This section uses example/ deployment files for demonstration. These should be modified with your deployment configurations such as namespace, quobyte registry, Quobyte API user credentials etc.

We use quobyte namespace for the examples. Create the namespace

kubectl create ns quobyte

Quobyte requires a secret to authenticate volume create and delete requests. Create this secret with your Quobyte API login credentials (Kubernetes requires base64 encoding for secret data which can be obtained with the command echo -n "value" | base64). Please encode your user name, password (and optionally access key information) in base64 and update example/quobyte-admin-credentials.yaml. If provided, access key ensures only authorized user can access the tenant and volumes (users must be restricted to their own namespace in k8s cluster).

kubectl create -f example/quobyte-admin-credentials.yaml

Create a storage class with the provisioner set to csi.quobyte.com along with other configuration parameters. You could create multiple storage classes by varying parameters such as quobyteTenant etc.

kubectl create -f example/StorageClass.yaml

Dynamic volume provisioning

Creating a PVC referencing the storage class created in the previous step would provision dynamic volume. The secret csi.storage.k8s.io/provisioner-secret-name from the namespace csi.storage.k8s.io/provisioner-secret-namespace in the referenced StorageClass will be used to authenticate volume creation and deletion.

1. Create PVC to trigger dynamic provisioning

   kubectl create -f example/pvc-dynamic-provision.yaml

2. Mount the PVC in a pod as shown in the following example

   kubectl create -f example/nginx-demo-pod-with-dynamic-vol.yaml

3. Wait for the pod to be in running state

   kubectl get po -w | grep 'nginx-dynamic-vol'

4. Once the pod is running, copy the index file to the deployed nginx pod

   kubectl cp example/index.html nginx-dynamic-vol:/tmp
   kubectl exec -it nginx-dynamic-vol -- mv /tmp/index.html /usr/share/nginx/html/
   kubectl exec -it nginx-dynamic-vol -- chown -R nginx:nginx /usr/share/nginx/html/

5. Access the home page served by nginx pod from the command line

   curl http://$(kubectl get pods nginx-dynamic-vol -o yaml | grep ' podIP:' | awk '{print $2}'):80

   Above command should retrieve the Quobyte CSI welcome page (in raw html format). If encountered error, see if you need to forward your local port to pod.

   NOTE: Depending on your cluster setup (for example, kind clusters), you may need to forward your local port to container to access the nginx pod port. In such case, you could use

   kubectl port-forward nginx-dynamic-vol 8086:80

and then try curl localhost:8086

Use existing volumes

Quobyte CSI requires the volume UUID to be passed on to the PV as VolumeHandle

• Quobyte-csi supports both volume name and UUID
  • To use Volume Name VolumeHandle should be of the format <Tenant_Name/UUID>|<Volume_Name> and nodePublishSecretRef with Quobyte API login credentials should be specified as shown in the example PV example/pv-existing-vol.yaml
  • To use Volume UUID VolumeHandle can be |<Volume_UUID>.

In order to use the pre-provisioned test volume belonging to the tenant My Tenant, user needs to create a PV with volumeHandle: My Tenant|test as shown in the example PV.

1. Edit example/pv-existing-vol.yaml and point it to the the pre-provisioned volume in Quobyte storage through volumeHandle. Create the PV with pre-provisioned volume.

   kubectl create -f example/pv-existing-vol.yaml

2. Create a PVC that matches the storage requirements with the above PV (make sure both PV and PVC refer to the same storage class). The created PVC will automatically binds to the PV.

   kubectl create -f example/pvc-existing-vol.yaml

3. Create a pod referring the PVC as shown in the below example

   kubectl create -f example/nginx-demo-pod-with-existing-vol.yaml

4. Wait for the pod to be in running state

   kubectl get po -w | grep 'nginx-existing-vol'

5. Once the pod is running, copy the index file to the deployed nginx pod

   kubectl cp example/index.html nginx-existing-vol:/tmp
   kubectl exec -it nginx-existing-vol -- mv /tmp/index.html /usr/share/nginx/html/
   kubectl exec -it nginx-existing-vol -- chown -R nginx:nginx /usr/share/nginx/html/

6. Access the home page served by nginx pod from the command line

   curl http://$(kubectl get pods nginx-existing-vol -o yaml | grep ' podIP:' | awk '{print $2}'):80

   Above command should retrieve the Quobyte CSI welcome page (in raw html format). If encountered error, see if you need to forward your local port to pod.

   NOTE: Depending on your cluster setup (for example, kind clusters), you may need to forward your local port to container to access the nginx pod port. In such case, you could use

   kubectl port-forward nginx-dynamic-vol 8086:80

and then try curl localhost:8086

Volume snapshots

Snapshot Requirements

1. Quobyte CSI Driver is deployed with enableSnapshots: true

2. Snapshotter setup

Dynamic Snapshots

1. Provision a PVC for a Quobyte volume by following the instructions

2. Populate backing volume with nginx index file

   VOLUME="<Quobyte-Volume>" # volume for which snapshot will be taken
   wget https://raw.githubusercontent.com/quobyte/quobyte-csi/master/example/index.html -P <values.clientMountPoint>/mounts/$VOLUME

3. Create volume snapshot secrets

   Our examples use same secret in all the places wherever secret is required. Please create and configure secrets as per your requirements.

   kubectl create -f example/quobyte-admin-credentials.yaml

4. Create volume snapshot class

   kubectl create -f example/volume-snapshot-class.yaml

5. Create dynamic volume snapshot

   kubectl create -f example/volume-snapshot-dynamic-provision.yaml

   The above command should create required volumesnapshotcontent object dynamically

6. (optional) verify created volumesnapshot and volumesnapshotcontent objects

   kubectl get volumesnapshot
   kubectl get volumesnapshotcontent

7. Restore snapshot and create PVC

   kubectl create -f example/restore-snapshot-pvc-dynamic-provision.yaml

   This should create a PVC and a PV for the restored snapshot

8. Create pod with restored snapshot

   kubectl create -f example/nginx-demo-pod-with-dynamic-snapshot-vol.yaml

Pre-provisioned Snapshots

1. Create volume snapshot class

   kubectl create -f example/volume-snapshot-class.yaml

2. Create volume snapshot secrets

   Our examples use same secret in all the places wherever secret is required. Please create and configure secrets as per your requirements.

   kubectl create -f example/quobyte-admin-credentials.yaml

3. Create VolumeSnapshotContent object for pre-provisioned volume with required configuration

   kubectl create -f example/volume-snapshot-content-pre-provisioned.yaml

4. Create VolumeSnapshot object by adjusting the example snapshot object

   name and namespace must match volumeSnapshotRef details from the step 2

   kubectl create -f example/volume-snapshot-pre-provisioned.yaml

5. (optional) verify created volumesnapshot and volumesnapshotcontent objects

   kubectl get volumesnapshot
   kubectl get volumesnapshotcontent

6. Restore snapshot

   kubectl create -f example/restore-snapshot-pvc-pre-provisioned.yaml

7. Create pod with restored snapshot

   kubectl create -f example/nginx-demo-pod-with-pre-provisioned-snapshot-vol.yaml

Uninstall Quobyte CSI

1. Delete Quobyte CSI containers and corresponding RBAC

   List available helm charts

   helm list

   Delete intended chart

   helm delete <Quobyte-CSI-chart-name>

Snapshotter Setup

Install Snapshotter

The below setup is required once per k8s cluster

  kubectl create -f quobyte-csi-driver/k8s-snapshot-crd.yaml
  kubectl create -f quobyte-csi-driver/k8s-snapshot-controller.yaml

Remove Snapshotter

  kubectl delete -f quobyte-csi-driver/k8s-snapshot-controller.yaml
  kubectl delete -f quobyte-csi-driver/k8s-snapshot-crd.yaml