第3章 Deploying OpenShift Container Storage on Red Hat OpenStack Platform in external mode

Red Hat OpenShift Container Storage can use an externally hosted Red Hat Ceph Storage (RHCS) cluster as the storage provider on Red Hat OpenStack Platform. See Planning your deployment for more information.

For instructions regarding how to install a RHCS 4 cluster, see Installation guide.

Follow these steps to deploy OpenShift Container Storage in external mode:

3.1. Installing Red Hat OpenShift Container Storage Operator

You can install Red Hat OpenShift Container Storage Operator using the Red Hat OpenShift Container Platform Operator Hub.

Prerequisites

  • Access to an OpenShift Container Platform cluster using an account with cluster-admin and Operator installation permissions.
  • You have at least three worker nodes in the Red Hat OpenShift Container Platform cluster.
  • For additional resource requirements, see Planning your deployment.
注記
  • When you need to override the cluster-wide default node selector for OpenShift Container Storage, you can use the following command in command line interface to specify a blank node selector for the openshift-storage namespace (create openshift-storage namespace in this case):

    $ oc annotate namespace openshift-storage openshift.io/node-selector=
  • Taint a node as infra to ensure only Red Hat OpenShift Container Storage resources are scheduled on that node. This helps you save on subscription costs. For more information, see How to use dedicated worker nodes for Red Hat OpenShift Container Storage chapter in Managing and Allocating Storage Resources guide.

Procedure

  1. Navigate in the web console to the click Operators → OperatorHub.
  2. Scroll or type a keyword into the Filter by keyword box to search for OpenShift Container Storage Operator.
  3. Click Install on the OpenShift Container Storage operator page.
  4. On the Install Operator page, the following required options are selected by default:

    1. Update Channel as stable-4.8.
    2. Installation Mode as A specific namespace on the cluster.
    3. Installed Namespace as Operator recommended namespace openshift-storage. If Namespace openshift-storage does not exist, it will be created during the operator installation.
    4. Select Approval Strategy as Automatic or Manual.
    5. Click Install.

      If you select Automatic updates, then the Operator Lifecycle Manager (OLM) automatically upgrades the running instance of your Operator without any intervention.

      If you selected Manual updates, then the OLM creates an update request. As a cluster administrator, you must then manually approve that update request to have the Operator updated to the new version.

Verification steps

Verify that the OpenShift Container Storage Operator shows a green tick indicating successful installation.

Next steps

  • Create an OpenShift Container Storage cluster.

For information, see Creating an OpenShift Container Storage Cluster service for external mode.