Deploying OpenShift Container Storage using Amazon Web Services

Red Hat OpenShift Container Storage 4.6

How to install and set up OpenShift Container Storage on OpenShift Container Platform AWS Clusters

Red Hat Storage Documentation Team

Abstract

Read this document for instructions on installing Red Hat OpenShift Container Storage 4.6 using Amazon Web Services for local or cloud storage.

Preface

Red Hat OpenShift Container Storage 4.6 supports deployment on existing Red Hat OpenShift Container Platform (RHOCP) AWS clusters in connected or disconnected environments along with out-of-the-box support for proxy environments.

Note

Only internal Openshift Container Storage clusters are supported on AWS. See Planning your deployment for more information about deployment requirements.

To deploy OpenShift Container Storage in internal mode, follow the appropriate deployment process for your environment:

Chapter 1. Deploy using dynamic storage devices

Deploying OpenShift Container Storage on OpenShift Container Platform using dynamic storage devices provided by AWS EBS (type: gp2) provides you with the option to create internal cluster resources. This will result in the internal provisioning of the base services, which helps to make additional storage classes available to applications.

Note

Only internal Openshift Container Storage clusters are supported on AWS. See Planning your deployment for more information about deployment requirements.

  1. For Red Hat Enterprise Linux based hosts for worker nodes in a user provisioned infrastructure (UPI), enable the container access to the underlying file system. Follow the instructions on enable file system access for containers on Red Hat Enterprise Linux based nodes.

    Note

    Skip this step for Red Hat Enterprise Linux CoreOS (RHCOS).

  2. Install the Red Hat OpenShift Container Storage Operator.
  3. Create the OpenShift Container Storage Cluster Service.

1.1. Enabling file system access for containers on Red Hat Enterprise Linux based nodes

Deploying OpenShift Container Storage on an OpenShift Container Platform with worker nodes on a Red Hat Enterprise Linux base in a user provisioned infrastructure (UPI) does not automatically provide container access to the underlying Ceph file system.

Note

This process is not necessary for hosts based on Red Hat Enterprise Linux CoreOS.

Procedure

Perform the following steps on each node in your cluster.

  1. Log in to the Red Hat Enterprise Linux based node and open a terminal.
  2. Verify that the node has access to the rhel-7-server-extras-rpms repository.

    # subscription-manager repos --list-enabled | grep rhel-7-server

    If you do not see both rhel-7-server-rpms and rhel-7-server-extras-rpms in the output, or if there is no output, run the following commands to enable each repository.

    # subscription-manager repos --enable=rhel-7-server-rpms
    # subscription-manager repos --enable=rhel-7-server-extras-rpms
  3. Install the required packages.

    # yum install -y policycoreutils container-selinux
  4. Persistently enable container use of the Ceph file system in SELinux.

    # setsebool -P container_use_cephfs on

1.2. 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. For information about the hardware and software requirements, see Planning your deployment.

Prerequisites

  • You must be logged into the OpenShift Container Platform (RHOCP) cluster.
  • You must have at least three worker nodes in the RHOCP cluster.
Note
  • 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:

    $ 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. Click Operators → OperatorHub in the left pane of the OpenShift Web Console.
  2. Use Filter by keyword text box or the filter list to search for OpenShift Container Storage from the list of operators.
  3. Click OpenShift Container Storage.
  4. On the OpenShift Container Storage operator page, click Install.
  5. On the Install Operator page, ensure the following options are selected by default::

    1. Update Channel as stable-4.6
    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 Enable operator recommended cluster monitoring on this namespace checkbox as this is required for cluster monitoring.
    5. Select Approval Strategy as Automatic or Manual. Approval Strategy is set to Automatic by default.

      • Approval Strategy as Automatic.

        Note

        When you select the Approval Strategy as Automatic, approval is not required either during fresh installation or when updating to the latest version of OpenShift Container Storage.

        1. Click Install
        2. Wait for the install to initiate. This may take up to 20 minutes.
        3. Click Operators → Installed Operators
        4. Ensure the Project is openshift-storage. By default, the Project is openshift-storage.
        5. Wait for the Status of OpenShift Container Storage to change to Succeeded.
      • Approval Strategy as Manual.

        Note

        When you select the Approval Strategy as Manual, approval is required during fresh installation or when updating to the latest version of OpenShift Container Storage.

        1. Click Install
        2. On the Manual approval required page, you can either click Approve or View Installed Operators in namespace openshift-storage to install the operator.

          Important

          Before you click either of the options, wait for a few minutes on the Manual approval required page until the install plan gets loaded in the window.

          Important

          If you choose to click Approve, you must review the install plan before you proceed.

          • If you click Approve.

            • Wait for a few minutes while the OpenShift Container Storage Operator is getting installed.
            • On the Installed operator - ready for use page, click View Operator.
            • Ensure the Project is openshift-storage. By default, the Project is openshift-storage.
            • Click Operators → Installed Operators
            • Wait for the Status of OpenShift Container Storage to change to Succeeded.
          • If you click View Installed Operators in namespace openshift-storage .

            • On the Installed Operators page, click ocs-operator.
            • On the Subscription Details page, click the Install Plan link.
            • On the InstallPlan Details page, click Preview Install Plan.
            • Review the install plan and click Approve.
            • Wait for the Status of the Components to change from Unknown to either Created or Present.
            • Click Operators → Installed Operators
            • Ensure the Project is openshift-storage. By default, the Project is openshift-storage.
            • Wait for the Status of OpenShift Container Storage to change to Succeeded.

Verification steps

  • Verify that OpenShift Container Storage Operator shows a green tick indicating successful installation.
  • Click View Installed Operators in namespace openshift-storage link to verify that OpenShift Container Storage Operator shows the Status as Succeeded on the Installed Operators dashboard.

1.3. Creating an OpenShift Container Storage Cluster Service in internal mode

Use this procedure to create an OpenShift Container Storage Cluster Service after you install the OpenShift Container Storage operator.

Prerequisites

Procedure

  1. Click Operators → Installed Operators to view all the installed operators.

    Ensure that the Project selected is openshift-storage.

    Figure 1.1. OpenShift Container Storage Operator page

    Screenshot of OpenShift Container Storage operator dashboard.
  2. Click OpenShift Container Storage.

    Figure 1.2. Details tab of OpenShift Container Storage

    Screenshot of selected operator details tab.
  3. Click Create Instance link of Storage Cluster.

    Figure 1.3. Create Storage Cluster page

    Screenshot of Create Cluster Service page where you can select mode of deployment.
  4. On the Create Storage Cluster page, ensure that the following options are selected:

    1. In the Select Mode section, Internal mode is selected by default.
    2. Storage Class is set by default to gp2 for AWS.
    3. Select OpenShift Container Storage Service Capacity from drop down list.

      Note

      Once you select the initial storage capacity, cluster expansion will only be performed using the selected usable capacity (times 3 of raw storage).

    4. (Optional) In the Encryption section, set the toggle to Enabled to enable data encryption on the cluster.
    5. In the Nodes section, select at least three worker nodes from the available list for the use of OpenShift Container Storage service.

      For cloud platforms with multiple availability zones, ensure that the Nodes are spread across different Locations/availability zones.

      Note

      To find specific worker nodes in the cluster, you can filter nodes on the basis of Name or Label.

      • Name allows you to search by name of the node
      • Label allows you to search by selecting the predefined label

      If the nodes selected do not match the OpenShift Container Storage cluster requirement of an aggregated 30 CPUs and 72 GiB of RAM, a minimal cluster will be deployed. For minimum starting node requirements, see Resource requirements section in Planning guide.

  5. Click Create.

    The Create button is enabled only after you select three nodes. A new storage cluster with three storage devices will be created, one per selected node. The default configuration uses a replication factor of 3.

Verification steps

  1. Verify that the final Status of the installed storage cluster shows as Phase: Ready with a green tick mark.

    • Click Operators → Installed Operators → Storage Cluster link to view the storage cluster installation status.
    • Alternatively, when you are on the Operator Details tab, you can click on the Storage Cluster tab to view the status.
  2. To verify that all components for OpenShift Container Storage are successfully installed, see Verifying your OpenShift Container Storage installation.

Chapter 2. Deploying using local storage devices

Deploying OpenShift Container Storage on OpenShift Container Platform using local storage devices provides you with the option to create internal cluster resources. This will result in the internal provisioning of the base services, which helps to make additional storage classes available to applications.

Use this section to deploy OpenShift Container Storage on Amazon EC2 storage optimized I3 where OpenShift Container Platform is already installed.

Important

Installing OpenShift Container Storage on Amazon EC2 storage optimized I3 instances using the Local Storage Operator is a Technology Preview feature. Technology Preview features are not supported with Red Hat production service level agreements (SLAs) and might not be functionally complete. Red Hat does not recommend using them in production. These features provide early access to upcoming product features, enabling customers to test functionality and provide feedback during the development process. Red Hat OpenShift Container Storage deployment assumes a new cluster, without any application or other workload running on the 3 worker nodes. Applications should run on additional worker nodes.

2.1. Overview of deploying with internal local storage

To deploy Red Hat OpenShift Container Storage using local storage, follow these steps:

2.2. Requirements for installing OpenShift Container Storage using local storage devices

  • You must upgrade to a latest version of OpenShift Container Platform 4.6 before deploying OpenShift Container Storage 4.6. For information, see Updating OpenShift Container Platform clusters guide.
  • The Local Storage Operator version must match the Red Hat OpenShift Container Platform version in order to have the Local Storage Operator fully supported with Red Hat OpenShift Container Storage. The Local Storage Operator does not get upgraded when Red Hat OpenShift Container Platform is upgraded.
  • You must have at least three OpenShift Container Platform worker nodes in the cluster with locally attached storage devices on each of them.

    • Each of the three selected nodes must have at least one raw block device available to be used by OpenShift Container Storage.
    • The devices you use must be empty; the disks must not include physical volumes (PVs), volume groups (VGs), or logical volumes (LVs) remaining on the disk.
  • For minimum starting node requirements, see Resource requirements section in Planning guide.
  • You must have a minimum of three labeled nodes.

    • Ensure that the Nodes are spread across different Locations/Availability Zones for a multiple availability zones platform.
    • Each node that has local storage devices to be used by OpenShift Container Storage must have a specific label to deploy OpenShift Container Storage pods. To label the nodes, use the following command:

      $ oc label nodes <NodeNames> cluster.ocs.openshift.io/openshift-storage=''

2.3. Enabling file system access for containers on Red Hat Enterprise Linux based nodes

Deploying OpenShift Container Storage on an OpenShift Container Platform with worker nodes on a Red Hat Enterprise Linux base in a user provisioned infrastructure (UPI) does not automatically provide container access to the underlying Ceph file system.

Note

This process is not necessary for hosts based on Red Hat Enterprise Linux CoreOS.

Procedure

Perform the following steps on each node in your cluster.

  1. Log in to the Red Hat Enterprise Linux based node and open a terminal.
  2. Verify that the node has access to the rhel-7-server-extras-rpms repository.

    # subscription-manager repos --list-enabled | grep rhel-7-server

    If you do not see both rhel-7-server-rpms and rhel-7-server-extras-rpms in the output, or if there is no output, run the following commands to enable each repository.

    # subscription-manager repos --enable=rhel-7-server-rpms
    # subscription-manager repos --enable=rhel-7-server-extras-rpms
  3. Install the required packages.

    # yum install -y policycoreutils container-selinux
  4. Persistently enable container use of the Ceph file system in SELinux.

    # setsebool -P container_use_cephfs on

2.4. 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. For information about the hardware and software requirements, see Planning your deployment.

Prerequisites

  • You must be logged into the OpenShift Container Platform (RHOCP) cluster.
  • You must have at least three worker nodes in the RHOCP cluster.
Note
  • 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:

    $ 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. Click Operators → OperatorHub in the left pane of the OpenShift Web Console.
  2. Use Filter by keyword text box or the filter list to search for OpenShift Container Storage from the list of operators.
  3. Click OpenShift Container Storage.
  4. On the OpenShift Container Storage operator page, click Install.
  5. On the Install Operator page, ensure the following options are selected by default::

    1. Update Channel as stable-4.6
    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 Enable operator recommended cluster monitoring on this namespace checkbox as this is required for cluster monitoring.
    5. Select Approval Strategy as Automatic or Manual. Approval Strategy is set to Automatic by default.

      • Approval Strategy as Automatic.

        Note

        When you select the Approval Strategy as Automatic, approval is not required either during fresh installation or when updating to the latest version of OpenShift Container Storage.

        1. Click Install
        2. Wait for the install to initiate. This may take up to 20 minutes.
        3. Click Operators → Installed Operators
        4. Ensure the Project is openshift-storage. By default, the Project is openshift-storage.
        5. Wait for the Status of OpenShift Container Storage to change to Succeeded.
      • Approval Strategy as Manual.

        Note

        When you select the Approval Strategy as Manual, approval is required during fresh installation or when updating to the latest version of OpenShift Container Storage.

        1. Click Install
        2. On the Manual approval required page, you can either click Approve or View Installed Operators in namespace openshift-storage to install the operator.

          Important

          Before you click either of the options, wait for a few minutes on the Manual approval required page until the install plan gets loaded in the window.

          Important

          If you choose to click Approve, you must review the install plan before you proceed.

          • If you click Approve.

            • Wait for a few minutes while the OpenShift Container Storage Operator is getting installed.
            • On the Installed operator - ready for use page, click View Operator.
            • Ensure the Project is openshift-storage. By default, the Project is openshift-storage.
            • Click Operators → Installed Operators
            • Wait for the Status of OpenShift Container Storage to change to Succeeded.
          • If you click View Installed Operators in namespace openshift-storage .

            • On the Installed Operators page, click ocs-operator.
            • On the Subscription Details page, click the Install Plan link.
            • On the InstallPlan Details page, click Preview Install Plan.
            • Review the install plan and click Approve.
            • Wait for the Status of the Components to change from Unknown to either Created or Present.
            • Click Operators → Installed Operators
            • Ensure the Project is openshift-storage. By default, the Project is openshift-storage.
            • Wait for the Status of OpenShift Container Storage to change to Succeeded.

Verification steps

  • Verify that OpenShift Container Storage Operator shows a green tick indicating successful installation.
  • Click View Installed Operators in namespace openshift-storage link to verify that OpenShift Container Storage Operator shows the Status as Succeeded on the Installed Operators dashboard.

2.5. Installing Local Storage Operator

Use this procedure to install the Local Storage Operator from the Operator Hub before creating OpenShift Container Storage clusters on local storage devices.

Procedure

  1. Log in to the OpenShift Web Console.
  2. Click Operators → OperatorHub.
  3. Search for Local Storage Operator from the list of operators and click on it.
  4. Click Install.

    Figure 2.1. Install Operator page

    Screenshot of Install Operator page.
  5. Set the following options on the Install Operator page:

    1. Update Channel as 4.6
    2. Installation Mode as A specific namespace on the cluster
    3. Installed Namespace as Operator recommended namespace openshift-local-storage.
    4. Approval Strategy as Automatic
  6. Click Install.
  7. Verify that the Local Storage Operator shows the Status as Succeeded.

2.6. Finding available storage devices

Use this procedure to identify the device names for each of the three or more nodes that you have labeled with the OpenShift Container Storage label cluster.ocs.openshift.io/openshift-storage='' before creating PVs.

Procedure

  1. List and verify the name of the nodes with the OpenShift Container Storage label.

    $ oc get nodes -l cluster.ocs.openshift.io/openshift-storage=

    Example output:

    NAME                                        STATUS   ROLES    AGE     VERSION
    ip-10-0-135-71.us-east-2.compute.internal    Ready    worker   6h45m   v1.16.2
    ip-10-0-145-125.us-east-2.compute.internal   Ready    worker   6h45m   v1.16.2
    ip-10-0-160-91.us-east-2.compute.internal    Ready    worker   6h45m   v1.16.2
  2. Log in to each node that is used for OpenShift Container Storage resources and find the unique by-id device name for each available raw block device.

    $ oc debug node/<node name>

    Example output:

    $ oc debug node/ip-10-0-135-71.us-east-2.compute.internal
    Starting pod/ip-10-0-135-71us-east-2computeinternal-debug ...
    To use host binaries, run `chroot /host`
    Pod IP: 10.0.135.71
    If you don't see a command prompt, try pressing enter.
    sh-4.2# chroot /host
    sh-4.4# lsblk
    NAME                         MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
    xvda                         202:0    0   120G  0 disk
    |-xvda1                      202:1    0   384M  0 part /boot
    |-xvda2                      202:2    0   127M  0 part /boot/efi
    |-xvda3                      202:3    0     1M  0 part
    `-xvda4                      202:4    0 119.5G  0 part
      `-coreos-luks-root-nocrypt 253:0    0 119.5G  0 dm   /sysroot
    nvme0n1                      259:0    0   2.3T  0 disk
    nvme1n1                      259:1    0   2.3T  0 disk

    In this example, for the selected node, the local devices available are nvme0n1 and nvme1n1.

  3. Identify the unique ID for each of the devices selected in Step 2.

    sh-4.4#  ls -l /dev/disk/by-id/ | grep Storage
    lrwxrwxrwx. 1 root root 13 Mar 17 16:24 nvme-Amazon_EC2_NVMe_Instance_Storage_AWS10382E5D7441494EC -> ../../nvme0n1
    lrwxrwxrwx. 1 root root 13 Mar 17 16:24 nvme-Amazon_EC2_NVMe_Instance_Storage_AWS60382E5D7441494EC -> ../../nvme1n1

    In the example above, the IDs for the two local devices are

    • nvme0n1: nvme-Amazon_EC2_NVMe_Instance_Storage_AWS10382E5D7441494EC
    • nvme1n1: nvme-Amazon_EC2_NVMe_Instance_Storage_AWS60382E5D7441494EC
  4. Repeat the above step to identify the device ID for all the other nodes that have the storage devices to be used by OpenShift Container Storage. See this Knowledge Base article for more details.

2.7. Creating OpenShift Container Storage cluster on Amazon EC2 storage optimized - i3en.2xlarge instance type

Use this procedure to create OpenShift Container Storage cluster on Amazon EC2 (storage optimized - i3en.2xlarge instance type) infrastructure, which will:

  1. Create PVs by using the LocalVolume CR
  2. Create a new StorageClass

The Amazon EC2 storage optimized - i3en.2xlarge instance type includes two non-volatile memory express (NVMe) disks. The example in this procedure illustrates the use of both the disks that the instance type comes with.

When you are using the ephemeral storage of Amazon EC2 I3

  • Use three availability zones to decrease the risk of losing all the data.
  • Limit the number of users with ec2:StopInstances permissions to avoid instance shutdown by mistake.
Warning

It is not recommended to use ephemeral storage of Amazon EC2 I3 for OpenShift Container Storage persistent data, because stopping all the three nodes can cause data loss.

It is recommended to use ephemeral storage of Amazon EC2 I3 only in following scenarios:

  • Cloud burst where data is copied from another location for a specific data crunching, which is limited in time
  • Development or testing environment
Important

Installing OpenShift Container Storage on Amazon EC2 storage optimized - i3en.2xlarge instance using local storage operator is a Technology Preview feature. Technology Preview features are not supported with Red Hat production service level agreements (SLAs) and might not be functionally complete. Red Hat does not recommend using them in production. These features provide early access to upcoming product features, enabling customers to test functionality and provide feedback during the development process.

Prerequisites

  • Ensure that all the requirements in the Requirements for installing OpenShift Container Storage using local storage devices section are met.
  • Verify your OpenShift Container Platform worker nodes are labeled for OpenShift Container Storage, which is used as the nodeSelector.

    oc get nodes -l cluster.ocs.openshift.io/openshift-storage -o jsonpath='{range .items[*]}{.metadata.name}{"\n"}'

    Example output:

    ip-10-0-135-71.us-east-2.compute.internal
    ip-10-0-145-125.us-east-2.compute.internal
    ip-10-0-160-91.us-east-2.compute.internal

Procedure

  1. Create local persistent volumes (PVs) on the storage nodes using LocalVolume custom resource (CR).

    Example of LocalVolume CR local-storage-block.yaml using OpenShift Storage Container label as node selector and by-id device identifier:

    apiVersion: local.storage.openshift.io/v1
    kind: LocalVolume
    metadata:
      name: local-block
      namespace: openshift-local-storage
      labels:
        app: ocs-storagecluster
    spec:
      tolerations:
      - key: "node.ocs.openshift.io/storage"
        value: "true"
        effect: NoSchedule
      nodeSelector:
        nodeSelectorTerms:
          - matchExpressions:
              - key: cluster.ocs.openshift.io/openshift-storage
                operator: In
                values:
                  - ''
      storageClassDevices:
        - storageClassName: localblock
          volumeMode: Block
          devicePaths:
            - /dev/disk/by-id/nvme-Amazon_EC2_NVMe_Instance_Storage_AWS10382E5D7441494EC   # <-- modify this line
            - /dev/disk/by-id/nvme-Amazon_EC2_NVMe_Instance_Storage_AWS1F45C01D7E84FE3E9   # <-- modify this line
            - /dev/disk/by-id/nvme-Amazon_EC2_NVMe_Instance_Storage_AWS136BC945B4ECB9AE4   # <-- modify this line
            - /dev/disk/by-id/nvme-Amazon_EC2_NVMe_Instance_Storage_AWS10382E5D7441464EP   # <-- modify this line
            - /dev/disk/by-id/nvme-Amazon_EC2_NVMe_Instance_Storage_AWS1F45C01D7E84F43E7   # <-- modify this line
            - /dev/disk/by-id/nvme-Amazon_EC2_NVMe_Instance_Storage_AWS136BC945B4ECB9AE8   # <-- modify this line

    Each Amazon EC2 I3 instance has two disks and this example uses both disks on each node.

  2. Create the LocalVolume CR.

    $ oc create -f local-storage-block.yaml

    Example output:

    localvolume.local.storage.openshift.io/local-block created
  3. Check if the pods are created.

    $ oc -n openshift-local-storage get pods
  4. Check if the PVs are created.

    You must see a new PV for each of the local storage devices on the three worker nodes. Refer to the example in the Finding available storage devices section that shows two available storage devices per worker node with a size 2.3 TiB for each node.

    $ oc get pv

    Example output:

    NAME               CAPACITY ACCESS MODES  RECLAIM POLICY STATUS       CLAIM     STORAGECLASS  REASON   AGE
    local-pv-1a46bc79  2328Gi   RWO           Delete         Available              localblock             14m
    local-pv-429d90ee  2328Gi   RWO           Delete         Available              localblock             14m
    local-pv-4d0a62e3  2328Gi   RWO           Delete         Available              localblock             14m
    local-pv-55c05d76  2328Gi   RWO           Delete         Available              localblock             14m
    local-pv-5c7b0990  2328Gi   RWO           Delete         Available              localblock             14m
    local-pv-a6b283b   2328Gi   RWO           Delete         Available              localblock             14m
  5. Check for the new StorageClass that is now present when the LocalVolume CR is created. This StorageClass is used to provide the StorageCluster PVCs in the following steps.

    $ oc get sc | grep localblock

    Example output:

    NAME            PROVISIONER                    RECLAIMPOLICY
    VOLUMEBINDINGMODE ALLOWVOLUMEEXPANSION     AGE
    localblock      kubernetes.io/no-provisioner   Delete
    WaitForFirstConsumer  false                15m
  6. Create the StorageCluster CR that uses the localblock StorageClass to consume the PVs created by the Local Storage Operator.

    Example of StorageCluster CR ocs-cluster-service.yaml using monDataDirHostPath and localblock StorageClass.

    apiVersion: ocs.openshift.io/v1
    kind: StorageCluster
    metadata:
      name: ocs-storagecluster
      namespace: openshift-storage
    spec:
      manageNodes: false
      resources:
        mds:
          limits:
            cpu: 3
            memory: 8Gi
          requests:
            cpu: 1
            memory: 8Gi
      monDataDirHostPath: /var/lib/rook
      storageDeviceSets:
        - count: 2
          dataPVCTemplate:
            spec:
              accessModes:
                - ReadWriteOnce
              resources:
                requests:
                  storage: 2328Gi
              storageClassName: localblock
              volumeMode: Block
          name: ocs-deviceset
          placement: {}
          portable: false
          replica: 3
          resources:
            limits:
              cpu: 2
              memory: 5Gi
            requests:
              cpu: 1
              memory: 5Gi
    Important

    To ensure that the OSDs have a guaranteed size across the nodes, the storage size for storageDeviceSets must be specified as less than or equal to the size of the PVs created on the nodes.

  7. Create StorageCluster CR.

    $ oc create -f ocs-cluster-service.yaml

    Example output

    storagecluster.ocs.openshift.io/ocs-cluster-service created

Chapter 3. Verifying OpenShift Container Storage deployment for internal mode

Use this section to verify that OpenShift Container Storage is deployed correctly.

3.1. Verifying the state of the pods

To determine if OpenShift Container storage is deployed successfully, you can verify that the pods are in Running state.

Procedure

  1. Click Workloads → Pods from the left pane of the OpenShift Web Console.
  2. Select openshift-storage from the Project drop down list.

    For more information on the expected number of pods for each component and how it varies depending on the number of nodes, see Table 3.1, “Pods corresponding to OpenShift Container storage cluster”.

  3. Verify that the following pods are in running and completed state by clicking on the Running and the Completed tabs:

    Table 3.1. Pods corresponding to OpenShift Container storage cluster

    ComponentCorresponding pods

    OpenShift Container Storage Operator

    • ocs-operator-* (1 pod on any worker node)
    • ocs-metrics-exporter-*

    Rook-ceph Operator

    rook-ceph-operator-*

    (1 pod on any worker node)

    Multicloud Object Gateway

    • noobaa-operator-* (1 pod on any worker node)
    • noobaa-core-* (1 pod on any storage node)
    • nooba-db-* (1 pod on any storage node)
    • noobaa-endpoint-* (1 pod on any storage node)

    MON

    rook-ceph-mon-*

    (3 pods distributed across storage nodes)

    MGR

    rook-ceph-mgr-*

    (1 pod on any storage node)

    MDS

    rook-ceph-mds-ocs-storagecluster-cephfilesystem-*

    (2 pods distributed across storage nodes)

    CSI

    • cephfs

      • csi-cephfsplugin-* (1 pod on each worker node)
      • csi-cephfsplugin-provisioner-* (2 pods distributed across storage nodes)
    • rbd

      • csi-rbdplugin-* (1 pod on each worker node)
      • csi-rbdplugin-provisioner-* (2 pods distributed across storage nodes)

    rook-ceph-crashcollector

    rook-ceph-crashcollector-*

    (1 pod on each storage node)

    OSD

    • rook-ceph-osd-* (1 pod for each device)
    • rook-ceph-osd-prepare-ocs-deviceset-* (1 pod for each device)

3.2. Verifying the OpenShift Container Storage cluster is healthy

  • Click Home → Overview from the left pane of the OpenShift Web Console and click Persistent Storage tab.
  • In the Status card, verify that OCS Cluster and Data Resiliency has a green tick mark as shown in the following image:

    Figure 3.1. Health status card in Persistent Storage Overview Dashboard

    Screenshot of Health card in persistent storage dashboard
  • In the Details card, verify that the cluster information is displayed as follows:

    Service Name
    OpenShift Container Storage
    Cluster Name
    ocs-storagecluster
    Provider
    AWS
    Mode
    Internal
    Version
    ocs-operator-4.6.0

For more information on the health of OpenShift Container Storage cluster using the persistent storage dashboard, see Monitoring OpenShift Container Storage.

3.3. Verifying the Multicloud Object Gateway is healthy

  • Click Home → Overview from the left pane of the OpenShift Web Console and click the Object Service tab.
  • In the Status card, verify that both Object Service and Data Resiliency are in Ready state (green tick).

    Figure 3.2. Health status card in Object Service Overview Dashboard

    Screenshot of Health card in object service dashboard
  • In the Details card, verify that the MCG information is displayed as follows:

    Service Name
    OpenShift Container Storage
    System Name
    Multicloud Object Gateway
    Provider
    AWS
    Version
    ocs-operator-4.6.0

For more information on the health of the OpenShift Container Storage cluster using the object service dashboard, see Monitoring OpenShift Container Storage.

3.4. Verifying that the OpenShift Container Storage specific storage classes exist

To verify the storage classes exists in the cluster:

  • Click Storage → Storage Classes from the left pane of the OpenShift Web Console.
  • Verify that the following storage classes are created with the OpenShift Container Storage cluster creation:

    • ocs-storagecluster-ceph-rbd
    • ocs-storagecluster-cephfs
    • openshift-storage.noobaa.io

Chapter 4. Uninstalling OpenShift Container Storage

4.1. Uninstalling OpenShift Container Storage in Internal mode

Use the steps in this section to uninstall OpenShift Container Storage.

Uninstall Annotations

Annotations on the Storage Cluster are used to change the behavior of the uninstall process. To define the uninstall behavior, the following two annotations have been introduced in the storage cluster:

  • uninstall.ocs.openshift.io/cleanup-policy: delete
  • uninstall.ocs.openshift.io/mode: graceful

The below table provides information on the different values that can used with these annotations:

Table 4.1. uninstall.ocs.openshift.io uninstall annotations descriptions

AnnotationValueDefaultBehavior

cleanup-policy

delete

Yes

Rook cleans up the physical drives and the DataDirHostPath

cleanup-policy

retain

No

Rook does not clean up the physical drives and the DataDirHostPath

mode

graceful

Yes

Rook and NooBaa pauses the uninstall process until the PVCs and the OBCs are removed by the administrator/user

mode

forced

No

Rook and NooBaa proceeds with uninstall even if PVCs/OBCs provisioned using Rook and NooBaa exist respectively.

You can change the cleanup policy or the uninstall mode by editing the value of the annotation by using the following commands:

$ oc annotate storagecluster ocs-storagecluster uninstall.ocs.openshift.io/cleanup-policy="retain" --overwrite
storagecluster.ocs.openshift.io/ocs-storagecluster annotated
$ oc annotate storagecluster ocs-storagecluster uninstall.ocs.openshift.io/mode="forced" --overwrite
storagecluster.ocs.openshift.io/ocs-storagecluster annotated

Prerequisites

  • Ensure that the OpenShift Container Storage cluster is in a healthy state. The uninstall process can fail when some of the pods are not terminated successfully due to insufficient resources or nodes. In case the cluster is in an unhealthy state, contact Red Hat Customer Support before uninstalling OpenShift Container Storage.
  • Ensure that applications are not consuming persistent volume claims (PVCs) or object bucket claims (OBCs) using the storage classes provided by OpenShift Container Storage.
  • If any custom resources (such as custom storage classes, cephblockpools) were created by the admin, they must be deleted by the admin after removing the resources which consumed them.

Procedure

  1. Delete the volume snapshots that are using OpenShift Container Storage.

    1. List the volume snapshots from all the namespaces.

      $ oc get volumesnapshot --all-namespaces
    2. From the output of the previous command, identify and delete the volume snapshots that are using OpenShift Container Storage.

      $ oc delete volumesnapshot <VOLUME-SNAPSHOT-NAME> -n <NAMESPACE>
  2. Delete PVCs and OBCs that are using OpenShift Container Storage.

    In the default uninstall mode (graceful), the uninstaller waits till all the PVCs and OBCs that use OpenShift Container Storage are deleted.

    If you wish to delete the Storage Cluster without deleting the PVCs beforehand, you may set the uninstall mode annotation to "forced" and skip this step. Doing so will result in orphan PVCs and OBCs in the system.

    1. Delete OpenShift Container Platform monitoring stack PVCs using OpenShift Container Storage.

      See Section 4.2, “Removing monitoring stack from OpenShift Container Storage”

    2. Delete OpenShift Container Platform Registry PVCs using OpenShift Container Storage.

      See Section 4.3, “Removing OpenShift Container Platform registry from OpenShift Container Storage”

    3. Delete OpenShift Container Platform logging PVCs using OpenShift Container Storage.

      See Section 4.4, “Removing the cluster logging operator from OpenShift Container Storage”

    4. Delete other PVCs and OBCs provisioned using OpenShift Container Storage.

      • Given below is a sample script to identify the PVCs and OBCs provisioned using OpenShift Container Storage. The script ignores the PVCs that are used internally by Openshift Container Storage.

        #!/bin/bash
        
        RBD_PROVISIONER="openshift-storage.rbd.csi.ceph.com"
        CEPHFS_PROVISIONER="openshift-storage.cephfs.csi.ceph.com"
        NOOBAA_PROVISIONER="openshift-storage.noobaa.io/obc"
        RGW_PROVISIONER="openshift-storage.ceph.rook.io/bucket"
        
        NOOBAA_DB_PVC="noobaa-db"
        NOOBAA_BACKINGSTORE_PVC="noobaa-default-backing-store-noobaa-pvc"
        
        # Find all the OCS StorageClasses
        OCS_STORAGECLASSES=$(oc get storageclasses | grep -e "$RBD_PROVISIONER" -e "$CEPHFS_PROVISIONER" -e "$NOOBAA_PROVISIONER" -e "$RGW_PROVISIONER" | awk '{print $1}')
        
        # List PVCs in each of the StorageClasses
        for SC in $OCS_STORAGECLASSES
        do
                echo "======================================================================"
                echo "$SC StorageClass PVCs and OBCs"
                echo "======================================================================"
                oc get pvc  --all-namespaces --no-headers 2>/dev/null | grep $SC | grep -v -e "$NOOBAA_DB_PVC" -e "$NOOBAA_BACKINGSTORE_PVC"
                oc get obc  --all-namespaces --no-headers 2>/dev/null | grep $SC
                echo
        done
        Note

        Omit RGW_PROVISIONER for cloud platforms.

      • Delete the OBCs.

        $ oc delete obc <obc name> -n <project name>
      • Delete the PVCs.

        $ oc delete pvc <pvc name> -n <project-name>
        Note

        Ensure that you have removed any custom backing stores, bucket classes, etc., created in the cluster.

  3. Delete the Storage Cluster object and wait for the removal of the associated resources.

    $ oc delete -n openshift-storage storagecluster --all --wait=true
  4. Check for cleanup pods if the uninstall.ocs.openshift.io/cleanup-policy was set to delete(default) and ensure that their status is Completed.

    $ oc get pods -n openshift-storage | grep -i cleanup
    NAME                                READY   STATUS      RESTARTS   AGE
    cluster-cleanup-job-<xx>        	0/1     Completed   0          8m35s
    cluster-cleanup-job-<yy>     		0/1     Completed   0          8m35s
    cluster-cleanup-job-<zz>     		0/1     Completed   0          8m35s
  5. Confirm that the directory /var/lib/rook is now empty. This directory will be empty only if the uninstall.ocs.openshift.io/cleanup-policy annotation was set to delete(default).

    $ for i in $(oc get node -l cluster.ocs.openshift.io/openshift-storage= -o jsonpath='{ .items[*].metadata.name }'); do oc debug node/${i} -- chroot /host  ls -l /var/lib/rook; done
  6. If encryption was enabled at the time of install, remove dm-crypt managed device-mapper mapping from OSD devices on all the OpenShift Container Storage nodes.

    1. Create a debug pod and chroot to the host on the storage node.

      $ oc debug node/<node name>
      $ chroot /host
    2. Get Device names and make note of the OpenShift Container Storage devices.

      $ dmsetup ls
      ocs-deviceset-0-data-0-57snx-block-dmcrypt (253:1)
    3. Remove the mapped device.

      $ cryptsetup luksClose --debug --verbose ocs-deviceset-0-data-0-57snx-block-dmcrypt

      If the above command gets stuck due to insufficient privileges, run the following commands:

      • Press CTRL+Z to exit the above command.
      • Find PID of the cryptsetup process which was stuck.

        $ ps

        Example output:

        PID     TTY    TIME     CMD
        778825   ?     00:00:00 cryptsetup

        Take a note of the PID number to kill. In this example, PID is 778825.

      • Terminate the process using kill command.

        $ kill -9 <PID>
      • Verify that the device name is removed.

        $ dmsetup ls
  7. Delete the namespace and wait till the deletion is complete. You will need to switch to another project if openshift-storage is the active project.

    For example:

    $ oc project default
    $ oc delete project openshift-storage --wait=true --timeout=5m

    The project is deleted if the following command returns a NotFound error.

    $ oc get project openshift-storage
    Note

    While uninstalling OpenShift Container Storage, if namespace is not deleted completely and remains in Terminating state, perform the steps in Troubleshooting and deleting remaining resources during Uninstall to identify objects that are blocking the namespace from being terminated.

  8. Delete local storage operator configurations if you have deployed OpenShift Container Storage using local storage devices. See Removing local storage operator configurations.
  9. Unlabel the storage nodes.

    $ oc label nodes  --all cluster.ocs.openshift.io/openshift-storage-
    $ oc label nodes  --all topology.rook.io/rack-
  10. Remove the OpenShift Container Storage taint if the nodes were tainted.

    $ oc adm taint nodes --all node.ocs.openshift.io/storage-
  11. Confirm all PVs provisioned using OpenShift Container Storage are deleted. If there is any PV left in the Released state, delete it.

    $ oc get pv
    $ oc delete pv <pv name>
  12. Delete the Multicloud Object Gateway storageclass.

    $ oc delete storageclass openshift-storage.noobaa.io --wait=true --timeout=5m
  13. Remove CustomResourceDefinitions.

    $ oc delete crd backingstores.noobaa.io bucketclasses.noobaa.io cephblockpools.ceph.rook.io cephclusters.ceph.rook.io cephfilesystems.ceph.rook.io cephnfses.ceph.rook.io cephobjectstores.ceph.rook.io cephobjectstoreusers.ceph.rook.io noobaas.noobaa.io ocsinitializations.ocs.openshift.io storageclusters.ocs.openshift.io cephclients.ceph.rook.io cephobjectrealms.ceph.rook.io cephobjectzonegroups.ceph.rook.io cephobjectzones.ceph.rook.io cephrbdmirrors.ceph.rook.io --wait=true --timeout=5m
  14. To ensure that OpenShift Container Storage is uninstalled completely, on the OpenShift Container Platform Web Console,

    1. Click Home → Overview to access the dashboard.
    2. Verify that the Persistent Storage and Object Service tabs no longer appear next to the Cluster tab.

4.1.1. Removing local storage operator configurations

Use the instructions in this section only if you have deployed OpenShift Container Storage using local storage devices.

Note

For OpenShift Container Storage deployments only using localvolume resources, go directly to step 8.

Procedure

  1. Identify the LocalVolumeSet and the corresponding StorageClassName being used by OpenShift Container Storage.
  2. Set the variable SC to the StorageClass providing the LocalVolumeSet.

    $ export SC="<StorageClassName>"
  3. Delete the LocalVolumeSet.

    $ oc delete localvolumesets.local.storage.openshift.io <name-of-volumeset> -n openshift-local-storage
  4. Delete the local storage PVs for the given StorageClassName.

    $ oc get pv | grep $SC | awk '{print $1}'| xargs oc delete pv
  5. Delete the StorageClassName.

    $ oc delete sc $SC
  6. Delete the symlinks created by the LocalVolumeSet.

    [[ ! -z $SC ]] && for i in $(oc get node -l cluster.ocs.openshift.io/openshift-storage= -o jsonpath='{ .items[*].metadata.name }'); do oc debug node/${i} -- chroot /host rm -rfv /mnt/local-storage/${SC}/; done
  7. Delete LocalVolumeDiscovery.

    $ oc delete localvolumediscovery.local.storage.openshift.io/auto-discover-devices -n openshift-local-storage
  8. Removing LocalVolume resources (if any).

    Use the following steps to remove the LocalVolume resources that were used to provision PVs in the current or previous OpenShift Container Storage version. Also, ensure that these resources are not being used by other tenants on the cluster.

    For each of the local volumes, do the following:

    1. Identify the LocalVolume and the corresponding StorageClassName being used by OpenShift Container Storage.
    2. Set the variable LV to the name of the LocalVolume and variable SC to the name of the StorageClass

      For example:

      $ LV=local-block
      $ SC=localblock
    3. Delete the local volume resource.

      $ oc delete localvolume -n local-storage --wait=true $LV
    4. Delete the remaining PVs and StorageClasses if they exist.

      $ oc delete pv -l storage.openshift.com/local-volume-owner-name=${LV} --wait --timeout=5m
      $ oc delete storageclass $SC --wait --timeout=5m
    5. Clean up the artifacts from the storage nodes for that resource.

      $ [[ ! -z $SC ]] && for i in $(oc get node -l cluster.ocs.openshift.io/openshift-storage= -o jsonpath='{ .items[*].metadata.name }'); do oc debug node/${i} -- chroot /host rm -rfv /mnt/local-storage/${SC}/; done

      Example output:

      Starting pod/node-xxx-debug ...
      To use host binaries, run `chroot /host`
      removed '/mnt/local-storage/localblock/nvme2n1'
      removed directory '/mnt/local-storage/localblock'
      
      Removing debug pod ...
      Starting pod/node-yyy-debug ...
      To use host binaries, run `chroot /host`
      removed '/mnt/local-storage/localblock/nvme2n1'
      removed directory '/mnt/local-storage/localblock'
      
      Removing debug pod ...
      Starting pod/node-zzz-debug ...
      To use host binaries, run `chroot /host`
      removed '/mnt/local-storage/localblock/nvme2n1'
      removed directory '/mnt/local-storage/localblock'
      
      Removing debug pod ...

4.2. Removing monitoring stack from OpenShift Container Storage

Use this section to clean up the monitoring stack from OpenShift Container Storage.

The PVCs that are created as a part of configuring the monitoring stack are in the openshift-monitoring namespace.

Prerequisites

Procedure

  1. List the pods and PVCs that are currently running in the openshift-monitoring namespace.

    $ oc get pod,pvc -n openshift-monitoring
    NAME                           READY   STATUS    RESTARTS   AGE
    pod/alertmanager-main-0         3/3     Running   0          8d
    pod/alertmanager-main-1         3/3     Running   0          8d
    pod/alertmanager-main-2         3/3     Running   0          8d
    pod/cluster-monitoring-
    operator-84457656d-pkrxm        1/1     Running   0          8d
    pod/grafana-79ccf6689f-2ll28    2/2     Running   0          8d
    pod/kube-state-metrics-
    7d86fb966-rvd9w                 3/3     Running   0          8d
    pod/node-exporter-25894         2/2     Running   0          8d
    pod/node-exporter-4dsd7         2/2     Running   0          8d
    pod/node-exporter-6p4zc         2/2     Running   0          8d
    pod/node-exporter-jbjvg         2/2     Running   0          8d
    pod/node-exporter-jj4t5         2/2     Running   0          6d18h
    pod/node-exporter-k856s         2/2     Running   0          6d18h
    pod/node-exporter-rf8gn         2/2     Running   0          8d
    pod/node-exporter-rmb5m         2/2     Running   0          6d18h
    pod/node-exporter-zj7kx         2/2     Running   0          8d
    pod/openshift-state-metrics-
    59dbd4f654-4clng                3/3     Running   0          8d
    pod/prometheus-adapter-
    5df5865596-k8dzn                1/1     Running   0          7d23h
    pod/prometheus-adapter-
    5df5865596-n2gj9                1/1     Running   0          7d23h
    pod/prometheus-k8s-0            6/6     Running   1          8d
    pod/prometheus-k8s-1            6/6     Running   1          8d
    pod/prometheus-operator-
    55cfb858c9-c4zd9                1/1     Running   0          6d21h
    pod/telemeter-client-
    78fc8fc97d-2rgfp                3/3     Running   0          8d
    
    NAME                                                              STATUS   VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS                  AGE
    persistentvolumeclaim/my-alertmanager-claim-alertmanager-main-0   Bound    pvc-0d519c4f-15a5-11ea-baa0-026d231574aa   40Gi       RWO            ocs-storagecluster-ceph-rbd   8d
    persistentvolumeclaim/my-alertmanager-claim-alertmanager-main-1   Bound    pvc-0d5a9825-15a5-11ea-baa0-026d231574aa   40Gi       RWO            ocs-storagecluster-ceph-rbd   8d
    persistentvolumeclaim/my-alertmanager-claim-alertmanager-main-2   Bound    pvc-0d6413dc-15a5-11ea-baa0-026d231574aa   40Gi       RWO            ocs-storagecluster-ceph-rbd   8d
    persistentvolumeclaim/my-prometheus-claim-prometheus-k8s-0        Bound    pvc-0b7c19b0-15a5-11ea-baa0-026d231574aa   40Gi       RWO            ocs-storagecluster-ceph-rbd   8d
    persistentvolumeclaim/my-prometheus-claim-prometheus-k8s-1        Bound    pvc-0b8aed3f-15a5-11ea-baa0-026d231574aa   40Gi       RWO            ocs-storagecluster-ceph-rbd   8d
  2. Edit the monitoring configmap.

    $ oc -n openshift-monitoring edit configmap cluster-monitoring-config
  3. Remove any config sections that reference the OpenShift Container Storage storage classes as shown in the following example and save it.

    Before editing

    .
    .
    .
    apiVersion: v1
    data:
      config.yaml: |
        alertmanagerMain:
          volumeClaimTemplate:
            metadata:
              name: my-alertmanager-claim
            spec:
              resources:
                requests:
                  storage: 40Gi
              storageClassName: ocs-storagecluster-ceph-rbd
        prometheusK8s:
          volumeClaimTemplate:
            metadata:
              name: my-prometheus-claim
            spec:
              resources:
                requests:
                  storage: 40Gi
              storageClassName: ocs-storagecluster-ceph-rbd
    kind: ConfigMap
    metadata:
      creationTimestamp: "2019-12-02T07:47:29Z"
      name: cluster-monitoring-config
      namespace: openshift-monitoring
      resourceVersion: "22110"
      selfLink: /api/v1/namespaces/openshift-monitoring/configmaps/cluster-monitoring-config
      uid: fd6d988b-14d7-11ea-84ff-066035b9efa8
    .
    .
    .

    After editing

    .
    .
    .
    apiVersion: v1
    data:
      config.yaml: |
    kind: ConfigMap
    metadata:
      creationTimestamp: "2019-11-21T13:07:05Z"
      name: cluster-monitoring-config
      namespace: openshift-monitoring
      resourceVersion: "404352"
      selfLink: /api/v1/namespaces/openshift-monitoring/configmaps/cluster-monitoring-config
      uid: d12c796a-0c5f-11ea-9832-063cd735b81c
    .
    .
    .

    In this example, alertmanagerMain and prometheusK8s monitoring components are using the OpenShift Container Storage PVCs.

  4. Delete relevant PVCs. Make sure you delete all the PVCs that are consuming the storage classes.

    $ oc delete -n openshift-monitoring pvc <pvc-name> --wait=true --timeout=5m

4.3. Removing OpenShift Container Platform registry from OpenShift Container Storage

Use this section to clean up OpenShift Container Platform registry from OpenShift Container Storage. If you want to configure an alternative storage, see image registry

The PVCs that are created as a part of configuring OpenShift Container Platform registry are in the openshift-image-registry namespace.

Prerequisites

  • The image registry should have been configured to use an OpenShift Container Storage PVC.

Procedure

  1. Edit the configs.imageregistry.operator.openshift.io object and remove the content in the storage section.

    $ oc edit configs.imageregistry.operator.openshift.io

    Before editing

    .
    .
    .
    storage:
        pvc:
            claim: registry-cephfs-rwx-pvc
    .
    .
    .

    After editing

    .
    .
    .
    storage:
    .
    .
    .

    In this example, the PVC is called registry-cephfs-rwx-pvc, which is now safe to delete.

  2. Delete the PVC.

    $ oc delete pvc <pvc-name> -n openshift-image-registry --wait=true --timeout=5m

4.4. Removing the cluster logging operator from OpenShift Container Storage

Use this section to clean up the cluster logging operator from OpenShift Container Storage.

The PVCs that are created as a part of configuring cluster logging operator are in the openshift-logging namespace.

Prerequisites

  • The cluster logging instance should have been configured to use OpenShift Container Storage PVCs.

Procedure

  1. Remove the ClusterLogging instance in the namespace.

    $ oc delete clusterlogging instance -n openshift-logging --wait=true --timeout=5m

    The PVCs in the openshift-logging namespace are now safe to delete.

  2. Delete PVCs.

    $ oc delete pvc <pvc-name> -n openshift-logging --wait=true --timeout=5m