Deployment

IBM Spectrum Scale DAS requires a dedicated and compact Red Hat OpenShift cluster. Compact Red Hat OpenShift clusters are three-node clusters in which each Red Hat OpenShift node acts as a combined master and worker node.

The Red Hat OpenShift cluster must be dedicated to IBM Spectrum Scale DAS. You must not have other application pods on the same Red Hat OpenShift cluster. S3 applications must run on collocated and separate servers (same layer 2 network) running any operating system or any Kubernetes platform.

IBM Spectrum Scale DAS requires the Red Hat OpenShift cluster to be configured with IBM Spectrum Scale container native and IBM Spectrum Scale Container Storage Interface. The IBM Spectrum Scale container native cluster imports (remotely mounts) one IBM Spectrum Scale file system that is provided by a collocated IBM Spectrum Scale storage cluster. The IBM Spectrum Scale file system must be configured with NFSv4 ACLs. The storage cluster must be based on IBM Elastic Storage Systems (ESS).

IBM Spectrum Scale DAS includes an embedded license for Red Hat OpenShift Data Foundation the SKU MCT4201 Red Hat Cloud Data Federation for IBM Spectrum Scale. IBM Spectrum Scale DAS installs and configures the supported version of Red Hat OpenShift Data Foundation. The use of Red Hat OpenShift Data Foundation is limited to the integration in IBM Spectrum Scale. The use of Red Hat OpenShift Data Foundation features that are not configured by IBM Spectrum Scale DAS is not supported.

To improve scaling and performance of S3 object access, IBM Spectrum Scale DAS supports deployments on compact Red Hat OpenShift clusters that, in addition to the default Red Hat OpenShift network, are configured with high-speed Ethernet. For more information on configuring multiple networks for Red Hat OpenShift, see Red Hat OpenShift documentation.

Built on Red Hat OpenShift Container Platform and IBM Spectrum Scale, IBM Spectrum Scale DAS is resilient against infrastructure outages such as failures of Red Hat OpenShift Container Platform nodes and storage failures. IBM Spectrum Scale DAS uses the MetalLB feature of Red Hat OpenShift Container Platform to provide high-availability and load distribution of S3 object access.

For more information on deployment, see Planning and Deployment architecture.