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Chapter 2. Red Hat Gluster Storage Container Converged with OpenShift

Red Hat Gluster Storage Container Converged with OpenShift addresses the use-case where applications require both shared file storage and the flexibility of a converged infrastructure with compute and storage instances being scheduled and run from the same set of hardware.
This deployment delivers a hyper-converged solution, where the storage containers that host Red Hat Gluster Storage co-reside with the compute containers and serve out storage from the hosts that have local or direct attached storage to the compute containers. This solution integrates Red Hat Gluster Storage deployment and management with OpenShift services. As a result, persistent storage is delivered within an OpenShift pod that provides both compute and file storage.
Red Hat Gluster Storage Container Converged with OpenShift is built around three key technologies:
  • OpenShift provides the platform as a service (PaaS) infrastructure based on Kubernetes container management. Basic OpenShift architecture is built around multiple master systems where each system contains a set of nodes.
  • Red Hat Gluster Storage provides the containerized distributed storage based on Red Hat Gluster Storage 3.1.3 container. Each Red Hat Gluster Storage volume is composed of a collection of bricks, where each brick is the combination of a node and an export directory.
  • Heketi provides the Red Hat Gluster Storage volume life cycle management. It creates the Red Hat Gluster Storage volumes dynamically and supports multiple Red Hat Gluster Storage clusters.
The following list provides the administrators a solution workflow. The administrators can:
  • Create multiple persistent volumes (PV) and register these volumes with OpenShift.
  • Developers then submit a persistent volume claim (PVC).
  • A PV is identified and selected from a pool of available PVs and bound to the PVC.
  • The OpenShift pod then uses the PV for persistent storage.
Architecture - Red Hat Gluster Storage Container Converged with OpenShift

Figure 2.1. Architecture - Red Hat Gluster Storage Container Converged with OpenShift

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