Installing the IBM Cloud Object Storage cluster add-on
The IBM Cloud Object Storage cluster add-on is available in Beta for allowlisted accounts only. To get added to the allowlist, contact support. For more information, see Requesting access to allowlisted features.
- Prerequisites
- The IBM Cloud Object Storage plug-in requires at least 0.2 vCPU and 128 MB of memory.
Understanding bucket creation and removal
- You can use an existing bucket by specifying the bucket name in your PVC.
- If you provide a bucket name and that bucket doesn't exist, then a bucket with that name is created.
- If you don't provide a bucket name, then a bucket with the naming convention
temp-xxx
is created. - Buckets are deleted based on reclaim policy defined in your storage class.
- If
reclaimPolicy: Delete
is set, the bucket is deleted when the PVC is deleted. - If
reclaimPolicy: Retain
is set, the bucket is retained even after the PVC is deleted.
- If
Enabling the IBM Cloud Object Storage add-on
Before you begin: Log in to your account. If applicable, target the appropriate resource group. Set the context for your cluster.
- List the add-ons and find the version you want to install.
Example outputibmcloud ks cluster addon versions
OK Name Version Supported Kubernetes Range Supported OpenShift Range Kubernetes Default OpenShift Default ibm-object-csi-driver 0.1 (default) >=1.30.0 >=4.15.0 - -
- Install the add-on.
ibmcloud ks cluster addon enable ibm-object-csi-driver --cluster CLUSTER [--version VERSION]
- Verify the installation.
ibmcloud ks cluster addon ls --cluster CLUSTER
OK Name Version Health State Health Status ibm-object-csi-driver 0.1 normal Addon Ready. For more info: http://ibm.biz/addon-state (H1500)
- List the available storage classes.
kubectl get sc | grep object
ibm-object-storage-smart-rclone cos.s3.csi.ibm.io Delete Immediate false 17h ibm-object-storage-smart-rclone-retain cos.s3.csi.ibm.io Retain Immediate false 17h ibm-object-storage-smart-s3fs cos.s3.csi.ibm.io Delete Immediate false 17h ibm-object-storage-smart-s3fs-retain cos.s3.csi.ibm.io Retain Immediate false 17h ibm-object-storage-standard-rclone cos.s3.csi.ibm.io Delete Immediate false 17h ibm-object-storage-standard-rclone-retain cos.s3.csi.ibm.io Retain Immediate false 17h ibm-object-storage-standard-s3fs cos.s3.csi.ibm.io Delete Immediate false 17h ibm-object-storage-standard-s3fs-retain cos.s3.csi.ibm.io Retain Immediate false 17h
Deploying an app that uses IBM Cloud Object Storage
Create a Kubernetes secret that contains your COS credentials.
-
Save the following configuration as a file called
secret.yaml
.apiVersion: v1 kind: Secret type: cos-s3-csi-driver metadata: name: cos-secret-1 # Name your secret. This same name is used for the PVC in the following steps. namespace: <namespace> # Specify the namespace where you want to create the secret. data: bucketName: <base64-encoded-bucket-name> apiKey: <base64-encoded-COS-Service-Instance-API-key> accessKey: <base64-encoded-HMAC-access-key> secretKey: <base64-encoded-HMAC-secret-key> stringData: # uid: "3000" # Optional: Provide a uid to run as non root user. This must match runAsUser in SecurityContext of pod spec. mountOptions: |
-
Encode the credentials that you retrieved in the previous section to base64. Repeat this command for each parameter.
echo -n "<value>" | base64
-
Update the configuration file with the base64 encoded values.
-
Create the secret.
kubectl apply -f secret.yaml
Create a PVC
-
Save the following configuration to a file called
pvc.yaml
.apiVersion: v1 kind: PersistentVolumeClaim metadata: name: cos-secret-1 # Give your PVC the same name as the secret you created in the previous step. namespace: <namespace> # The namespace where you want to create the PVC. spec: accessModes: - ReadWriteMany resources: requests: storage: 10Gi storageClassName: <storage_class_name> # The storage class you want to use.
-
Edit the configuration file values. Make sure to specify the same namespace where you created your secret. For a list of storage classes, see the Storage class reference.
-
Create the PVC.
kubectl apply -f pvc.yaml
Create a deployment
-
Save the following configuration to a file called
dep.yaml
.apiVersion: apps/v1 kind: Deployment metadata: name: <name> labels: app: <name> spec: replicas: 1 selector: matchLabels: app: <name> template: metadata: labels: app: <name> spec: containers: - name: app-frontend image: <image> # Enter your app image. imagePullPolicy: IfNotPresent volumeMounts: - mountPath: <path_you_want_to_mount_the_volume_on> # For example `/dev` name: cos-csi-volume volumes: - name: cos-csi-volume persistentVolumeClaim: claimName: <pvc_name> # Enter the name of the PVC you created earlier.
-
Create the deployment.
kubectl apply -f dep.yaml
Setting up autorecovery for stale volumes
When the connection is lost between the ibm-object-csi-driver
node server pods and application pods, you might see TransportEndpoint
connection errors. One possible case for this error is when patch updates are applied.
To help avoid the connection errors, set up autorecovery of stale volumes by completing the following steps.
-
Copy the following yaml and save it as a file called
stale.yaml
apiVersion: objectdriver.csi.ibm.com/v1alpha1 kind: RecoverStaleVolume metadata: labels: app.kubernetes.io/name: recoverstalevolume app.kubernetes.io/instance: recoverstalevolume-sample name: recoverstalevolume-sample namespace: default spec: logHistory: 200 data: - namespace: default # The namesapce where your app is deployed deployments: [<A comma separated list of all the apps you want to recover>]
-
Create the
RecoverStaleVolume
resource in your cluster.kubectl create -f stale.yaml
Example output
recoverstalevolume.objectdriver.csi.ibm.com/recoverstalevolume-sample created
-
Verify that the resource was created.
kubectl get recoverstalevolume
Example output
NAME AGE recoverstalevolume-sample 41s
-
If the issue persists, contact support. Open a support case. In the case details, be sure to include any relevant log files, error messages, or command outputs.
Verifying recovery by simulating an error
-
List your deployments.
kubectl get deploy -o wide
Example output
NAME READY UP-TO-DATE AVAILABLE AGE CONTAINERS IMAGES SELECTOR cos-csi-test-app 1/1 1 1 7h24m app-frontend rabbitmq app=cos-csi-test-app
-
List your app pods.
kubectl get pods -o wide
Example output
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES cos-csi-test-app-6b99bd8bf4-5lt7p 1/1 Running 0 7h24m 172.30.69.21 10.73.114.86 <none> <none>
-
List the pods in the
ibm-object-csi-operator
namespace.kubectl get pods -n ibm-object-csi-operator -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES ibm-object-csi-controller-d64df8f57-l6grj 3/3 Running 0 7h31m 172.30.69.19 10.73.114.86 <none> <none> ibm-object-csi-node-6d4x4 3/3 Running 0 7h31m 172.30.64.24 10.48.3.149 <none> <none> ibm-object-csi-node-gg5pj 3/3 Running 0 7h31m 172.30.116.13 10.93.120.14 <none> <none> ibm-object-csi-node-vk8jf 3/3 Running 0 7h31m 172.30.69.20 10.73.114.86 <none> <none> ibm-object-csi-operator-controller-manager-8544d4f798-llbf8 1/1 Running 0 7h37m 172.30.69.18 10.73.114.86 <none> <none>
-
Delete the
ibm-object-csi-node-xxx
pod in theibm-object-csi-operator
namespace.kubectl delete pod ibm-object-csi-node-vk8jf -n ibm-object-csi-operator
Example output
pod "ibm-object-csi-node-vk8jf" deleted
-
List the pods in the
ibm-object-csi-operator
namespace.kubectl get pods -n ibm-object-csi-operator -o wide
Example output
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES ibm-object-csi-controller-d64df8f57-l6grj 3/3 Running 0 7h37m 172.30.69.19 10.73.114.86 <none> <none> ibm-object-csi-node-6d4x4 3/3 Running 0 7h37m 172.30.64.24 10.48.3.149 <none> <none> ibm-object-csi-node-gg5pj 3/3 Running 0 7h37m 172.30.116.13 10.93.120.14 <none> <none> ibm-object-csi-node-kmn94 3/3 Running 0 8s 172.30.69.23 10.73.114.86 <none> <none> ibm-object-csi-operator-controller-manager-8544d4f798-llbf8 1/1 Running 0 7h43m 172.30.69.18 10.73.114.86 <none> <none>
-
Get the logs of the
ibm-object-csi-operator-controller-manager
to follow the app pod recovery. Note that the Operator deletes the app's pod so that they get restarted.2024-07-10T17:25:39Z INFO recoverstalevolume_controller Time to complete {"fetchVolumeStatsFromNodeServerPodLogs": 0.066584637} 2024-07-10T17:25:39Z INFO recoverstalevolume_controller Volume Stats from NodeServer Pod Logs {"Request.Namespace": "default", "Request.Name": "recoverstalevolume-sample", "volume-stas": {"pvc-9d12a2f5-09a9-4eb4-b1f5-2a727249ed2b":"transport endpoint is not connected "}} 2024-07-10T17:25:39Z INFO recoverstalevolume_controller Stale Volume Found {"Request.Namespace": "default", "Request.Name": "recoverstalevolume-sample", "volume": "pvc-9d12a2f5-09a9-4eb4-b1f5-2a727249ed2b"} 2024-07-10T17:25:39Z INFO recoverstalevolume_controller Pod using stale volume {"Request.Namespace": "default", "Request.Name": "recoverstalevolume-sample", "volume-name": "pvc-9d12a2f5-09a9-4eb4-b1f5-2a727249ed2b", "pod-name": "cos-csi-test-app-6b99bd8bf4-5lt7p"} 2024-07-10T17:25:39Z INFO recoverstalevolume_controller Pod deleted. {"Request.Namespace": "default", "Request.Name": "recoverstalevolume-sample"}
Disabling the IBM Cloud Object Storage add-on
- Run the following command to disable the add-on.
Example outputibmcloud ks cluster addon disable ibm-object-csi-driver --cluster CLUSTER
Data and resources that you created for the add-on might be deleted when the add-on is disabled. Continue? [y/N]> y Disabling add-on ibm-object-csi-driver for cluster XXX... OK
- Verify the add-on was removed.
ibmcloud ks cluster addon ls --cluster CLUSTER
Migrating from the Helm plug-in to the cluster add-on
-
Get the details of your PVCs and select one to migrate.
kubectl get pvc --all-namespaces -o custom-columns='NAMESPACE:.metadata.namespace,NAME:.metadata.name' | tail -n +2 | while read namespace pvc; do kubectl describe pvc "$pvc" -n "$namespace" | grep 'volume.kubernetes.io/storage-provisioner: ibm.io/ibmc-s3fs' > /dev/null ; if [ $? -eq 0 ]; then echo "PVC: $pvc in Namespace: $namespace uses ibm.io/ibmc-s3fs storage provisioner"; fi; done
Example output
PVC: pvc-test in Namespace: default uses ibm.io/ibmc-s3fs storage provisioner
-
Describe the PVC and get the bucket name.
kubectl describe pvc <pvc_name> | grep ibm.io/bucket:
Example output
ibm.io/bucket: test-s3
-
Create a secret that has the same name as your PVC.
apiVersion: v1 kind: Secret type: cos-s3-csi-driver metadata: name: test-s3 # Name your secret the same name your PVC namespace: default # Specify the namespace where you want to create the secret. In this example, the previous PVC and secret were in the default namespace. data: bucketName: <base64-encoded-bucket-name> apiKey: <base64-encoded-COS-Service-Instance-API-key> accessKey: <base64-encoded-HMAC-access-key> secretKey: <base64-encoded-HMAC-secret-key> stringData: # uid: "3000" # Optional: Provide a uid to run as non root user. This must match runAsUser in SecurityContext of pod spec. mountOptions: |
-
Find the storage class that was used in your PVC.
kubectl describe pvc <pvc_name> | grep StorageClass:
Example command for a PVC called
test-s3
.kubectl describe pvc test-s3 | grep StorageClass:
Example output
StorageClass: ibmc-s3fs-smart-perf-regional
-
Review the new storage classes that are available with the add-on and select a replacement class.
- If you used a
flex
class, choose one of the newsmart
classes. - If you used a
standard
classes, choose one of the newstandard
classes. - The
cold
andvault
classes are no longer available with the add-on; choose asmart
orstandard
class instead.
- If you used a
-
Review the details of your PVC.
kubectl describe pvc test-s3
Example output
Name: pvc-test Namespace: default StorageClass: ibmc-s3fs-smart-perf-regional Status: Bound Volume: pvc-c625474d-31f0-4929-bc3e-feace1fb42fb Labels: <none> Annotations: ibm.io/auto-create-bucket: true ibm.io/auto-delete-bucket: true ibm.io/bucket: bha-test-s23 ibm.io/secret-name: satstoragesecret pv.kubernetes.io/bind-completed: yes pv.kubernetes.io/bound-by-controller: yes volume.beta.kubernetes.io/storage-provisioner: ibm.io/ibmc-s3fs volume.kubernetes.io/storage-provisioner: ibm.io/ibmc-s3fs Finalizers: [kubernetes.io/pvc-protection] Capacity: 3Gi Access Modes: RWO VolumeMode: Filesystem Used By: test-pod Events: <none>
-
Create a replacement PVC that uses a new storage class and references the secret you created earlier.
apiVersion: v1 kind: PersistentVolumeClaim metadata: name: test-s3 # Enter the same name as the secret you created earlier. spec: accessModes: - ReadWriteOnce resources: requests: storage: 3Gi storageClassName: ibm-object-storage-smart-s3fs
-
Verify the PVC is
Bound
.kubectl get pvc
-
Get the details of your app.
kubectl get pods
-
Scale down your app to zero.
kubectl scale deployment --replicas=0 my-app
-
Create a replacement deployment that references the PVC you created in the previous step.
-
After the new deployment is running, you can delete the old deployment.
-
Repeat these steps for each PVC that you want to migrate.
IBM Cloud Object Storage cluster add-on storage classes
Name | Reclaim policy | Binding mode |
---|---|---|
ibm-object-storage-smart-rclone | Delete | Immediate |
ibm-object-storage-smart-rclone-retain | Retain | Immediate |
ibm-object-storage-smart-s3fs | Delete | Immediate |
ibm-object-storage-smart-s3fs-retain | Retain | Immediate |
ibm-object-storage-standard-rclone | Delete | Immediate |
ibm-object-storage-standard-rclone-retain | Retain | Immediate |
ibm-object-storage-standard-s3fs | Delete | Immediate |
ibm-object-storage-standard-s3fs-retain | Retain | Immediate |