Installation
IBM Storage Scale is a clustered file system that provides concurrent access to a single file system or set of file systems from multiple nodes. The nodes can be SAN attached, network attached, a mixture of SAN attached, and network attached, or in a shared-nothing cluster configuration.
IBM Storage Scale in containers requires an IBM Storage Scale storage cluster outside the Red Hat Openshift Container Platform (RHOCP). In this case IBM Storage Scale Container Native (CNSA) acts as client cluster and remotely mounts file systems that are owned by other IBM Storage Scale clusters.
Deployment considerations
Before you start with the installation and configuration of IBM Storage Scale CNSA consider the following:
The RHOCP cluster requires a minimum of three control plane nodes and three compute nodes, with a maximum of 128 compute nodes.
Ensure that all the cluster nodes can communicate with each other using the host network and provide for a sufficient network bandwidth respectively.
In addition, ensure that your DNS is configured properly so that all the compute nodes can resolve the IBM Storage Scale storage cluster nodes. If you can’t change the DNS, add all storage cluster nodes to the /etc/hosts files to allow hostname resolution.
Red Hat Enterprise Linux CoreOS (RHCOS) restricts new file system mounts to the /mnt subtree. IBM Storage Scale can mount any file system below /mnt on the Red Hat OpenShift cluster regardless of the default mount point defined on the storage cluster.