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Deployment Guide—Dell EMC Ready Stack for Red Hat OpenShift Container Platform 4.6
Provisioning Storage
Introduction Prerequisites Unity XT storage PowerMax storage PowerScale storage OpenShift Container storage

Prerequisites

  • Ensure that:

    • OpenShift cluster 4.6 is running with multiple compute nodes that are running RHCOS or Red Hat Enterprise Linux 7.9.

    Note: Red Hat does not support running Red Hat Enterprise Linux 8.x on a compute node.

    • Dell EMC PowerMax, PowerScale, and Unity storage systems are properly configured.
    • FC switches are configured with proper zoning and compute nodes, and PowerMax or Unity storage systems are accessible to each other.
    • PowerMax is configured for iSCSI or FC; Unity is configured for iSCSI, FC, and NFS; PowerScale storage systems are configured for NFS.

    Multipath configuration

    Follow these steps:

    1. Obtain base64 content of the multipath.conf file:

    [core@csah multipathd]$ echo 'defaults {

    user_friendly_names yes

    find_multipaths yes

    }

    blacklist {

    }' | base64 -w0

    1. Create a machine config YAML file and specify the base64 contents in the file by following the steps in this sample file in GitHub. As user core in the CSAH node, run:

    [core@csah multipathd]$ oc create -f <machine config YAML>

    Note: The preceding machine configuration applies only to compute nodes. After the machine configuration file is created, every compute node is rebooted one at a time after the configuration is applied.

    Installing the CSI Operator

    The Dell CSI Operator for OpenShift is available in the operator hub.

    Note: Install the Dell CSI Operator before you install any of the CSI drivers for the installed storage system.

    To install the CSI Operator:

    1. Log in to the console using the kubeadmin username and password that are provided in the /home/core/openshift/auth/kubeadmin-password directory.
    2. Create a project in the CLI or from the OpenShift Console.

    [core@csah ~]$ oc new-project dell-csi-operators

    1. Go to Operators > OperatorHub and type Dell in the Filter by keyword search option.
    2. Select DELL EMC CSI Operator and click Install, as shown in the following figure:

    Figure 13.               CSI Operator Installation

    1. Specify the namespace and select “A specific namespace on the cluster” under Installation Mode. Click Install.

    The Subscription page opens, as shown in the following figure:

    Figure 14.               CSI Operator Subscription

    1. Validate the CSI Operator installation by running:

    [core@csah ~]$ oc get pods -n dell-openshift-operators

    NAME                            READY   STATUS    RESTARTS   AGE

    csi-operator-7bfc7fd59c-8q4hs   1/1     Running   0          4m3s

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Unity XT storage