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New to KubeDB? Please start here.

SingleStore Volume Expansion

This guide will show you how to use KubeDB Ops-manager operator to expand the volume of a SingleStore.

Before You Begin

  • At first, you need to have a Kubernetes cluster, and the kubectl command-line tool must be configured to communicate with your cluster.

  • You must have a StorageClass that supports volume expansion.

  • Install KubeDB Provisioner and Ops-manager operator in your cluster following the steps here.

  • You should be familiar with the following KubeDB concepts:

To keep everything isolated, we are going to use a separate namespace called demo throughout this tutorial.

$ kubectl create ns demo
namespace/demo created

Expand Volume of SingleStore

Here, we are going to deploy a SingleStore cluster using a supported version by KubeDB operator. Then we are going to apply SingleStoreOpsRequest to expand its volume. The process of expanding SingleStore standalone is same as SingleStore cluster.

Create SingleStore License Secret

We need SingleStore License to create SingleStore Database. So, Ensure that you have acquired a license and then simply pass the license by secret.

$ kubectl create secret generic -n demo license-secret \
                --from-literal=username=license \
                --from-literal=password='your-license-set-here'
secret/license-secret created

Prepare SingleStore Database

At first verify that your cluster has a storage class, that supports volume expansion. Let’s check,

$ kubectl get storageClass
NAME                   PROVISIONER             RECLAIMPOLICY   VOLUMEBINDINGMODE      ALLOWVOLUMEEXPANSION   AGE
local-path (default)   rancher.io/local-path   Delete          WaitForFirstConsumer   false                  6d2h
longhorn (default)     driver.longhorn.io      Delete          Immediate              true                   3d21h
longhorn-static        driver.longhorn.io      Delete          Immediate              true                   42m

Here, we will use longhorn storageClass for this tuitorial.

Now, we are going to deploy a SingleStore database of 3 replicas with version 8.7.10.

Deploy SingleStore

In this section, we are going to deploy a SingleStore Cluster with 1GB volume for aggregator nodes and 10GB volume for leaf nodes. Then, in the next section we will expand its volume to 2GB using SingleStoreOpsRequest CRD. Below is the YAML of the SingleStore CR that we are going to create,

apiVersion: kubedb.com/v1alpha2
kind: Singlestore
metadata:
  name: sample-sdb
  namespace: demo
spec:
  version: "8.7.10"
  topology:
    aggregator:
      replicas: 1
      podTemplate:
        spec:
          containers:
          - name: singlestore
            resources:
              limits:
                memory: "2Gi"
                cpu: "600m"
              requests:
                memory: "2Gi"
                cpu: "600m"
      storage:
        storageClassName: "longhorn"
        accessModes:
        - ReadWriteOnce
        resources:
          requests:
            storage: 1Gi
    leaf:
      replicas: 2
      podTemplate:
        spec:
          containers:
            - name: singlestore
              resources:
                limits:
                  memory: "2Gi"
                  cpu: "600m"
                requests:
                  memory: "2Gi"
                  cpu: "600m"                      
      storage:
        storageClassName: "longhorn"
        accessModes:
          - ReadWriteOnce
        resources:
          requests:
            storage: 10Gi
  licenseSecret:
    name: license-secret
  storageType: Durable
  deletionPolicy: WipeOut

Let’s create the SingleStore CR we have shown above,

$ kubectl create -f https://github.com/kubedb/docs/raw/v2024.9.30/docs/guides/singlestore/volume-expansion/volume-expansion/example/sample-sdb.yaml
singlestore.kubedb.com/sample-sdb created

Now, wait until sample-sdb has status Ready. i.e,

$ kubectl get sdb -n demo
NAME         TYPE                  VERSION   STATUS   AGE
sample-sdb   kubedb.com/v1alpha2   8.7.10    Ready    4m25s

Let’s check volume size from petset, and from the persistent volume,

$ kubectl get petset -n demo sample-sdb-aggregator -o json | jq '.spec.volumeClaimTemplates[].spec.resources.requests.storage'
"1Gi"

$ kubectl get petset -n demo sample-sdb-leaf -o json | jq '.spec.volumeClaimTemplates[].spec.resources.requests.storage'
"10Gi"

$ kubectl get pv -n demo
NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                               STORAGECLASS   VOLUMEATTRIBUTESCLASS   REASON   AGE
pvc-41cb892c-99fc-4211-a8c2-4e6f8a16c661   10Gi       RWO            Delete           Bound    demo/data-sample-sdb-leaf-0         longhorn       <unset>                          90s
pvc-6e241724-6577-408e-b8de-9569d7d785c4   10Gi       RWO            Delete           Bound    demo/data-sample-sdb-leaf-1         longhorn       <unset>                          75s
pvc-95ecc525-540b-4496-bf14-bfac901d73c4   1Gi        RWO            Delete           Bound    demo/data-sample-sdb-aggregator-0   longhorn       <unset>                          94s

You can see the aggregator petset has 1GB storage, and the capacity of all the aggregator persistent volumes are also 1GB.

You can see the leaf petset has 10GB storage, and the capacity of all the leaf persistent volumes are also 10GB.

We are now ready to apply the SingleStoreOpsRequest CR to expand the volume of this database.

Volume Expansion

Here, we are going to expand the volume of the SingleStore cluster.

Create SingleStoreOpsRequest

In order to expand the volume of the database, we have to create a SingleStoreOpsRequest CR with our desired volume size. Below is the YAML of the SingleStoreOpsRequest CR that we are going to create,

apiVersion: ops.kubedb.com/v1alpha1
kind: SinglestoreOpsRequest
metadata:
  name: sdb-offline-vol-expansion
  namespace: demo
spec:
  type: VolumeExpansion
  databaseRef:
    name: sample-sdb
  volumeExpansion:
    mode: "Offline"
    aggregator: 2Gi
    leaf: 11Gi

Here,

  • spec.databaseRef.name specifies that we are performing volume expansion operation on sample-sdb database.
  • spec.type specifies that we are performing VolumeExpansion on our database.
  • spec.volumeExpansion.aggregator and spec.volumeExpansion.leaf specifies the desired volume size for aggregator and leaf nodes.
  • spec.volumeExpansion.mode specifies the desired volume expansion mode (Online or Offline). Storageclass longhorn supports Offline volume expansion.

Note: If the Storageclass you are using doesn’t support Online Volume Expansion, Try offline volume expansion by using spec.volumeExpansion.mode:"Offline".

Let’s create the SingleStoreOpsRequest CR we have shown above,

$ kubectl apply -f https://github.com/kubedb/docs/raw/v2024.9.30/docs/guides/singlestore/volume-expansion/volume-expansion/example/sdb-offline-volume-expansion.yaml
singlestoreopsrequest.ops.kubedb.com/sdb-offline-vol-expansion created

Verify SingleStore volume expanded successfully

If everything goes well, KubeDB Ops-manager operator will update the volume size of SingleStore object and related PetSets and Persistent Volumes.

Let’s wait for SingleStoreOpsRequest to be Successful. Run the following command to watch SingleStoreOpsRequest CR,

$ kubectl get singlestoreopsrequest -n demo
NAME                        TYPE              STATUS       AGE
sdb-offline-vol-expansion   VolumeExpansion   Successful   13m

We can see from the above output that the SingleStoreOpsRequest has succeeded. If we describe the SingleStoreOpsRequest we will get an overview of the steps that were followed to expand the volume of the database.

$ kubectl describe sdbops -n demo sdb-offline-vol-expansion 
Name:         sdb-offline-vol-expansion
Namespace:    demo
Labels:       <none>
Annotations:  <none>
API Version:  ops.kubedb.com/v1alpha1
Kind:         SinglestoreOpsRequest
Metadata:
  Creation Timestamp:  2024-10-15T08:49:11Z
  Generation:          1
  Resource Version:    12476
  UID:                 a0e2f1c3-a6b7-4993-a012-2823c3a2675b
Spec:
  Apply:  IfReady
  Database Ref:
    Name:  sample-sdb
  Type:    VolumeExpansion
  Volume Expansion:
    Aggregator:  2Gi
    Leaf:        11Gi
    Mode:        Offline
Status:
  Conditions:
    Last Transition Time:  2024-10-15T08:49:11Z
    Message:               Singlestore ops-request has started to expand volume of singlestore nodes.
    Observed Generation:   1
    Reason:                VolumeExpansion
    Status:                True
    Type:                  VolumeExpansion
    Last Transition Time:  2024-10-15T08:49:17Z
    Message:               Successfully paused database
    Observed Generation:   1
    Reason:                DatabasePauseSucceeded
    Status:                True
    Type:                  DatabasePauseSucceeded
    Last Transition Time:  2024-10-15T08:49:42Z
    Message:               successfully deleted the petSets with orphan propagation policy
    Observed Generation:   1
    Reason:                OrphanPetSetPods
    Status:                True
    Type:                  OrphanPetSetPods
    Last Transition Time:  2024-10-15T08:49:22Z
    Message:               get pet set; ConditionStatus:True
    Observed Generation:   1
    Status:                True
    Type:                  GetPetSet
    Last Transition Time:  2024-10-15T08:49:22Z
    Message:               delete pet set; ConditionStatus:True
    Observed Generation:   1
    Status:                True
    Type:                  DeletePetSet
    Last Transition Time:  2024-10-15T08:51:07Z
    Message:               successfully updated Aggregator node PVC sizes
    Observed Generation:   1
    Reason:                UpdateAggregatorNodePVCs
    Status:                True
    Type:                  UpdateAggregatorNodePVCs
    Last Transition Time:  2024-10-15T08:53:32Z
    Message:               get pod; ConditionStatus:True
    Observed Generation:   1
    Status:                True
    Type:                  GetPod
    Last Transition Time:  2024-10-15T08:49:47Z
    Message:               is ops req patch; ConditionStatus:True
    Observed Generation:   1
    Status:                True
    Type:                  IsOpsReqPatch
    Last Transition Time:  2024-10-15T08:49:47Z
    Message:               delete pod; ConditionStatus:True
    Observed Generation:   1
    Status:                True
    Type:                  DeletePod
    Last Transition Time:  2024-10-15T08:50:22Z
    Message:               get pvc; ConditionStatus:True
    Observed Generation:   1
    Status:                True
    Type:                  GetPvc
    Last Transition Time:  2024-10-15T08:50:22Z
    Message:               is pvc patch; ConditionStatus:True
    Observed Generation:   1
    Status:                True
    Type:                  IsPvcPatch
    Last Transition Time:  2024-10-15T08:53:52Z
    Message:               compare storage; ConditionStatus:True
    Observed Generation:   1
    Status:                True
    Type:                  CompareStorage
    Last Transition Time:  2024-10-15T08:50:42Z
    Message:               create pod; ConditionStatus:True
    Observed Generation:   1
    Status:                True
    Type:                  CreatePod
    Last Transition Time:  2024-10-15T08:50:47Z
    Message:               is running single store; ConditionStatus:False
    Observed Generation:   1
    Status:                False
    Type:                  IsRunningSingleStore
    Last Transition Time:  2024-10-15T08:54:32Z
    Message:               successfully updated Leaf node PVC sizes
    Observed Generation:   1
    Reason:                UpdateLeafNodePVCs
    Status:                True
    Type:                  UpdateLeafNodePVCs
    Last Transition Time:  2024-10-15T08:54:43Z
    Message:               successfully reconciled the Singlestore resources
    Observed Generation:   1
    Reason:                UpdatePetSets
    Status:                True
    Type:                  UpdatePetSets
    Last Transition Time:  2024-10-15T08:54:48Z
    Message:               PetSet is recreated
    Observed Generation:   1
    Reason:                ReadyPetSets
    Status:                True
    Type:                  ReadyPetSets
    Last Transition Time:  2024-10-15T08:54:48Z
    Message:               Successfully completed volumeExpansion for Singlestore
    Observed Generation:   1
    Reason:                Successful
    Status:                True
    Type:                  Successful
  Observed Generation:     1
  Phase:                   Successful
Events:
  Type     Reason                                          Age    From                         Message
  ----     ------                                          ----   ----                         -------
  Normal   Starting                                        14m    KubeDB Ops-manager Operator  Start processing for SinglestoreOpsRequest: demo/sdb-offline-vol-expansion
  Normal   Starting                                        14m    KubeDB Ops-manager Operator  Pausing Singlestore database: demo/sample-sdb
  Normal   Successful                                      14m    KubeDB Ops-manager Operator  Successfully paused Singlestore database: demo/sample-sdb for SinglestoreOpsRequest: sdb-offline-vol-expansion
  Warning  get pet set; ConditionStatus:True               14m    KubeDB Ops-manager Operator  get pet set; ConditionStatus:True
  Warning  delete pet set; ConditionStatus:True            14m    KubeDB Ops-manager Operator  delete pet set; ConditionStatus:True
  Warning  get pet set; ConditionStatus:True               14m    KubeDB Ops-manager Operator  get pet set; ConditionStatus:True
  Warning  get pet set; ConditionStatus:True               14m    KubeDB Ops-manager Operator  get pet set; ConditionStatus:True
  Warning  delete pet set; ConditionStatus:True            14m    KubeDB Ops-manager Operator  delete pet set; ConditionStatus:True
  Warning  get pet set; ConditionStatus:True               14m    KubeDB Ops-manager Operator  get pet set; ConditionStatus:True
  Normal   OrphanPetSetPods                                13m    KubeDB Ops-manager Operator  successfully deleted the petSets with orphan propagation policy
  Warning  get pod; ConditionStatus:True                   13m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  is ops req patch; ConditionStatus:True          13m    KubeDB Ops-manager Operator  is ops req patch; ConditionStatus:True
  Warning  delete pod; ConditionStatus:True                13m    KubeDB Ops-manager Operator  delete pod; ConditionStatus:True
  Warning  get pod; ConditionStatus:False                  13m    KubeDB Ops-manager Operator  get pod; ConditionStatus:False
  Warning  get pod; ConditionStatus:True                   13m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pvc; ConditionStatus:True                   13m    KubeDB Ops-manager Operator  get pvc; ConditionStatus:True
  Warning  is pvc patch; ConditionStatus:True              13m    KubeDB Ops-manager Operator  is pvc patch; ConditionStatus:True
  Warning  compare storage; ConditionStatus:False          13m    KubeDB Ops-manager Operator  compare storage; ConditionStatus:False
  Warning  get pod; ConditionStatus:True                   13m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pvc; ConditionStatus:True                   13m    KubeDB Ops-manager Operator  get pvc; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   13m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pvc; ConditionStatus:True                   13m    KubeDB Ops-manager Operator  get pvc; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   13m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pvc; ConditionStatus:True                   13m    KubeDB Ops-manager Operator  get pvc; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   12m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pvc; ConditionStatus:True                   12m    KubeDB Ops-manager Operator  get pvc; ConditionStatus:True
  Warning  compare storage; ConditionStatus:True           12m    KubeDB Ops-manager Operator  compare storage; ConditionStatus:True
  Warning  create pod; ConditionStatus:True                12m    KubeDB Ops-manager Operator  create pod; ConditionStatus:True
  Warning  is ops req patch; ConditionStatus:True          12m    KubeDB Ops-manager Operator  is ops req patch; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   12m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  is running single store; ConditionStatus:False  12m    KubeDB Ops-manager Operator  is running single store; ConditionStatus:False
  Warning  get pod; ConditionStatus:True                   12m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   12m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   12m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Normal   UpdateAggregatorNodePVCs                        12m    KubeDB Ops-manager Operator  successfully updated Aggregator node PVC sizes
  Warning  get pod; ConditionStatus:True                   12m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  is ops req patch; ConditionStatus:True          12m    KubeDB Ops-manager Operator  is ops req patch; ConditionStatus:True
  Warning  delete pod; ConditionStatus:True                12m    KubeDB Ops-manager Operator  delete pod; ConditionStatus:True
  Warning  get pod; ConditionStatus:False                  12m    KubeDB Ops-manager Operator  get pod; ConditionStatus:False
  Warning  get pod; ConditionStatus:True                   11m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pvc; ConditionStatus:True                   11m    KubeDB Ops-manager Operator  get pvc; ConditionStatus:True
  Warning  is pvc patch; ConditionStatus:True              11m    KubeDB Ops-manager Operator  is pvc patch; ConditionStatus:True
  Warning  compare storage; ConditionStatus:False          11m    KubeDB Ops-manager Operator  compare storage; ConditionStatus:False
  Warning  get pod; ConditionStatus:True                   11m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pvc; ConditionStatus:True                   11m    KubeDB Ops-manager Operator  get pvc; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   11m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pvc; ConditionStatus:True                   11m    KubeDB Ops-manager Operator  get pvc; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   11m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pvc; ConditionStatus:True                   11m    KubeDB Ops-manager Operator  get pvc; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   11m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pvc; ConditionStatus:True                   11m    KubeDB Ops-manager Operator  get pvc; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   11m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pvc; ConditionStatus:True                   11m    KubeDB Ops-manager Operator  get pvc; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   11m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pvc; ConditionStatus:True                   11m    KubeDB Ops-manager Operator  get pvc; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   11m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pvc; ConditionStatus:True                   11m    KubeDB Ops-manager Operator  get pvc; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   11m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pvc; ConditionStatus:True                   11m    KubeDB Ops-manager Operator  get pvc; ConditionStatus:True
  Warning  compare storage; ConditionStatus:True           11m    KubeDB Ops-manager Operator  compare storage; ConditionStatus:True
  Warning  create pod; ConditionStatus:True                11m    KubeDB Ops-manager Operator  create pod; ConditionStatus:True
  Warning  is ops req patch; ConditionStatus:True          11m    KubeDB Ops-manager Operator  is ops req patch; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   11m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  is running single store; ConditionStatus:False  11m    KubeDB Ops-manager Operator  is running single store; ConditionStatus:False
  Warning  get pod; ConditionStatus:True                   11m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   10m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   10m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   10m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   10m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  is ops req patch; ConditionStatus:True          10m    KubeDB Ops-manager Operator  is ops req patch; ConditionStatus:True
  Warning  delete pod; ConditionStatus:True                10m    KubeDB Ops-manager Operator  delete pod; ConditionStatus:True
  Warning  get pod; ConditionStatus:False                  10m    KubeDB Ops-manager Operator  get pod; ConditionStatus:False
  Warning  get pod; ConditionStatus:True                   10m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pvc; ConditionStatus:True                   10m    KubeDB Ops-manager Operator  get pvc; ConditionStatus:True
  Warning  is pvc patch; ConditionStatus:True              10m    KubeDB Ops-manager Operator  is pvc patch; ConditionStatus:True
  Warning  compare storage; ConditionStatus:False          10m    KubeDB Ops-manager Operator  compare storage; ConditionStatus:False
  Warning  get pod; ConditionStatus:True                   10m    KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pvc; ConditionStatus:True                   10m    KubeDB Ops-manager Operator  get pvc; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   9m55s  KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pvc; ConditionStatus:True                   9m55s  KubeDB Ops-manager Operator  get pvc; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   9m50s  KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pvc; ConditionStatus:True                   9m50s  KubeDB Ops-manager Operator  get pvc; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   9m45s  KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pvc; ConditionStatus:True                   9m45s  KubeDB Ops-manager Operator  get pvc; ConditionStatus:True
  Warning  compare storage; ConditionStatus:True           9m45s  KubeDB Ops-manager Operator  compare storage; ConditionStatus:True
  Warning  create pod; ConditionStatus:True                9m45s  KubeDB Ops-manager Operator  create pod; ConditionStatus:True
  Warning  is ops req patch; ConditionStatus:True          9m45s  KubeDB Ops-manager Operator  is ops req patch; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   9m40s  KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   9m35s  KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   9m30s  KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   9m25s  KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   9m20s  KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   9m15s  KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Warning  get pod; ConditionStatus:True                   9m10s  KubeDB Ops-manager Operator  get pod; ConditionStatus:True
  Normal   UpdateLeafNodePVCs                              9m5s   KubeDB Ops-manager Operator  successfully updated Leaf node PVC sizes
  Normal   UpdatePetSets                                   8m54s  KubeDB Ops-manager Operator  successfully reconciled the Singlestore resources
  Warning  get pet set; ConditionStatus:True               8m49s  KubeDB Ops-manager Operator  get pet set; ConditionStatus:True
  Warning  get pet set; ConditionStatus:True               8m49s  KubeDB Ops-manager Operator  get pet set; ConditionStatus:True
  Normal   ReadyPetSets                                    8m49s  KubeDB Ops-manager Operator  PetSet is recreated
  Normal   Starting                                        8m49s  KubeDB Ops-manager Operator  Resuming Singlestore database: demo/sample-sdb
  Normal   Successful                                      8m49s  KubeDB Ops-manager Operator  Successfully resumed Singlestore database: demo/sample-sdb for SinglestoreOpsRequest: sdb-offline-vol-expansion

Now, we are going to verify from the Petset, and the Persistent Volumes whether the volume of the database has expanded to meet the desired state, Let’s check,

$ kubectl get petset -n demo sample-sdb-aggregator -o json | jq '.spec.volumeClaimTemplates[].spec.resources.requests.storage'
"2Gi"
$ kubectl get petset -n demo sample-sdb-leaf -o json | jq '.spec.volumeClaimTemplates[].spec.resources.requests.storage'
"11Gi"


$ kubectl get pv -n demo
NAME                                       CAPACITY   ACCESS MODES   RECLAIM POLICY   STATUS   CLAIM                               STORAGECLASS   VOLUMEATTRIBUTESCLASS   REASON   AGE
pvc-0a4b35e6-988e-4088-ae41-852ad82c5800   2Gi        RWO            Delete           Bound    demo/data-sample-sdb-aggregator-0   longhorn       <unset>                          22m
pvc-f6df5743-2bb1-4705-a2f7-be6cf7cdd7f1   11Gi       RWO            Delete           Bound    demo/data-sample-sdb-leaf-0         longhorn       <unset>                          22m
pvc-f8fee59d-74dc-46ac-9973-ff1701a6837b   11Gi       RWO            Delete           Bound    demo/data-sample-sdb-leaf-1         longhorn       <unset>                          19m

The above output verifies that we have successfully expanded the volume of the SingleStore database.

Cleaning Up

To clean up the Kubernetes resources created by this tutorial, run:

$ kubectl delete sdb -n demo sample-sdb
$ kubectl delete singlestoreopsrequest -n demo sdb-offline-volume-expansion

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