Hub Storage

OpenShift Storage - Persistent Storage using LVMS

After installing the SNO hub cluster, configure storage before installing ACM. These examples are for environments without existing external storage on the hub node.

Install LVM Storage Operator

1. Go to Ecosystem -> Software Catalog -> filter for "LVM Storage" -> click the tile
2. Click Install
3. Leave all the defaults and click Install
4. Wait for the Operator to install

Label the node as a storage node only if you are installing OpenShift Data Foundation (see the optional section below). LVM Storage does not use this label.

Create LVM Storage

1. Go to Ecosystem -> Installed Operators -> click "LVM Storage"
2. Click on the "LVMCluster" tab and then click "Create LVMCluster"

3. Switch to YAML view and update the path for your data disk:

   apiVersion: lvm.topolvm.io/v1alpha1
   kind: LVMCluster
   metadata:
     name: local-storage-lvm-cluster
     namespace: openshift-storage
   spec:
     storage:
       deviceClasses:
         - name: local-storage
           default: true
           fstype: xfs
           deviceSelector:
             paths:
               - /dev/nvme0n1
           thinPoolConfig:
             name: thin-pool-1
             sizePercent: 90
             overprovisionRatio: 10
             chunkSizeCalculationPolicy: Static
             metadataSizeCalculationPolicy: Host
   

4. Click Create

OPTIONAL - Install OpenShift Data Foundation - Object Storage

OpenShift Data Foundation Documentation

This is only needed if you are planning to use ODF as part of your OPP subscription. ODF is used here specifically for object storage required by MultiCluster Observability. If your storage provider does not offer object storage, you can deploy MinIO instead. See Using MinIO.

Label the hub node for ODF before creating the StorageCluster:

oc label node {{ node_name }} cluster.ocs.openshift.io/openshift-storage=

1. Go to Ecosystem -> Software Catalog -> filter for "OpenShift Data Foundation" -> click the tile
2. Click Install
3. Leave all the defaults and click Install
4. Wait for the Operator to install
5. Go to Ecosystem -> Installed Operators -> click "OpenShift Data Foundation"
6. Click on the "StorageCluster" tab and then click "Create StorageCluster"

7. Switch to YAML view and paste:

   apiVersion: ocs.openshift.io/v1
   kind: StorageCluster
   metadata:
     name: mcog-storagecluster
     namespace: openshift-storage
   spec:
     arbiter: {}
     encryption:
       keyRotation:
         schedule: '@weekly'
       kms: {}
     externalStorage: {}
     managedResources:
       cephObjectStoreUsers: {}
       cephCluster: {}
       cephBlockPools: {}
       cephNonResilientPools: {}
       cephObjectStores: {}
       cephFilesystems: {}
       cephRBDMirror: {}
       cephToolbox: {}
       cephDashboard: {}
       cephConfig: {}
     multiCloudGateway:
       dbStorageClassName: lvms-local-storage
       reconcileStrategy: standalone
     resourceProfile: balanced
   

8. Click Create

Verify

oc get lvmcluster -n openshift-storage
oc get storagecluster -n openshift-storage
oc get storageclass
oc get pods -n openshift-storage

Ensure the LVM StorageClass is set as default:

oc get storageclass | grep default