Creating a Kubernetes Persistent Volume

A Persistent Volume (PV) is used to store a pod's logs, product files, and more while setting up OMEnvironment through Sterling Order Management System Operator. A PV can either be dynamically allocated by the cloud platform based on storage classes or it can be configured manually.

1. Create a Kubernetes PV with access mode as ReadWriteMany and a minimum of 10 GB hard disk space, as illustrated in the following <sample_pv_file>.yaml example.

   Ensure that the PV storage is accessible by all the containers across the cluster and the owner group of the PersistenceVolume directory has write access, and the owner group ID is specified in the storage.securityContext.fsGroup parameter of the OMEnvironment custom resource.

   kind: PersistentVolume
   apiVersion: v1
   metadata:
     name: '<Release-name>-pv-oms'
   spec:
     capacity:
       storage: 10Gi
     accessModes:
       - ReadWriteMany
     storageClassName: default

   For more information about Persistent Volume, see Persistent Volumes in Kubernetes.
2. Pass the name for the Persistent Volume Claim (PVC) as a value to the storage.name parameter of OMEnvironment. If the PVC exists with that name, it is reused, else it is created. Ensure that the specification of persistent volume matches the parameters of storage spec of OMEnvironment.
3. Run the following command.

   oc create -f <sample_pv_file>.yaml -n <namespace>
   

   A Persistent Volume based on the values that are configured in the <sample_pv_file>.yaml is created.