第2章 Architecture of OpenShift Data Foundation
Red Hat OpenShift Data Foundation provides services for, and can run internally from the Red Hat OpenShift Container Platform.
図2.1 Red Hat OpenShift Data Foundation architecture
Red Hat OpenShift Data Foundation supports deployment into Red Hat OpenShift Container Platform clusters deployed on installer-provisioned or user-provisioned infrastructure.
For details about these two approaches, see OpenShift Container Platform - Installation process.
To know more about interoperability of components for Red Hat OpenShift Data Foundation and Red Hat OpenShift Container Platform, see Red Hat OpenShift Data Foundation Supportability and Interoperability Checker.
For information about the architecture and lifecycle of OpenShift Container Platform, see OpenShift Container Platform architecture.
For IBM Power, see OpenShift Container Platform - Installation process.
2.1. About operators
Red Hat OpenShift Data Foundation comprises of three main operators, which codify administrative tasks and custom resources so that you can easily automate the task and resource characteristics. Administrators define the desired end state of the cluster, and the OpenShift Data Foundation operators ensure the cluster is either in that state, or approaching that state, with minimal administrator intervention.
OpenShift Data Foundation operator
A meta-operator that draws on other operators in specific tested ways to codify and enforce the recommendations and requirements of a supported Red Hat OpenShift Data Foundation deployment. The rook-ceph and noobaa operators provide the storage cluster resource that wraps these resources.
Rook-ceph operator
This operator automates the packaging, deployment, management, upgrading, and scaling of persistent storage and file, block, and object services. It creates block and file storage classes for all environments, and creates an object storage class and services Object Bucket Claims (OBCs) made against it in on-premises environments.
Additionally, for internal mode clusters, it provides the ceph cluster resource, which manages the deployments and services representing the following:
- Object Storage Daemons (OSDs)
- Monitors (MONs)
- Manager (MGR)
- Metadata servers (MDS)
- RADOS Object Gateways (RGWs) on-premises only
Multicloud Object Gateway operator
This operator automates the packaging, deployment, management, upgrading, and scaling of the Multicloud Object Gateway (MCG) object service. It creates an object storage class and services the OBCs made against it.
Additionally, it provides the NooBaa cluster resource, which manages the deployments and services for NooBaa core, database, and endpoint.
OpenShift Data Foundation’s default configuration for MCG is optimized for low resource consumption and not performance. If you plan to use MCG often, see information about increasing resource limits in the knowledebase article Performance tuning guide for Multicloud Object Gateway.
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