第3章 OpenShift Data Foundation operators

The odf-operator has a dependency on the ocs-operator package. It also manages the Subscription of the mcg-operator. In addition, the odf-operator bundle defines a second Deployment for the OpenShift Data Foundation external plugin for the OpenShift Console. This defines an nginx-based Pod that serves the necessary files to register and integrate OpenShift Data Foundation dashboards directly into the OpenShift Container Platform Console.

This diagram illustrates how odf-operator is integrated with the OpenShift Container Platform.

図3.1 OpenShift Data Foundation Operator

The odf-operator defines the following CRD:

The StorageSystem CRD represents an underlying storage system that provides data storage and services for OpenShift Container Platform. It triggers the operator to ensure the existence of a Subscription for a given Kind of storage system.

The ocs-operator creates the following CRs in response to the spec of a given StorageSystem.

The odf-operator does not provide any data storage or services itself. It exists as an integration and management layer for other storage systems.

High availability is not a primary requirement for the odf-operator Pod similar to most of the other operators. In general, there are no operations that require or benefit from process distribution. OpenShift Container Platform quickly spins up a replacement Pod whenever the current Pod becomes unavailable or is deleted.

The odf-operator comes with a ConfigMap of variables that can be used to modify the behavior of the operator.

To get an understanding of the OpenShift Data Foundation and troubleshoot issues, you can look at the following:

The odf-operator is required to be present as long as the OpenShift Data Foundation bundle remains installed. This is managed as part of OLM’s reconciliation of the OpenShift Data Foundation CSV. At least one instance of the pod should be in Ready state.

The operator operands such as CRDs should not affect the lifecycle of the operator. The creation and deletion of StorageSystems is an operation outside the operator’s control and must be initiated by the administrator or automated with the appropriate application programming interface (API) calls.