Add a Ceph cluster

After you add machines to your new bare metal cluster as described in Add a machine to bare metal managed cluster, create a Ceph cluster on top of this managed cluster using the Mirantis Container Cloud web UI.

For an advanced configuration through the KaaSCephCluster CR, see Ceph advanced configuration. To configure Ceph Controller through Kubernetes templates to manage Ceph nodes resources, see Enable Ceph tolerations and resources management.

The procedure below enables you to create a Ceph cluster with minimum three Ceph nodes that provides persistent volumes to the Kubernetes workloads in the managed cluster.

To create a Ceph cluster in the managed cluster:

  1. Log in to the Container Cloud web UI with the m:kaas:namespace@operator or m:kaas:namespace@writer permissions.

  2. Switch to the required project using the Switch Project action icon located on top of the main left-side navigation panel.

  3. In the Clusters tab, click the required cluster name. The Cluster page with the Machines and Ceph clusters lists opens.

  4. In the Ceph Clusters block, click Create Cluster.

  5. Configure the Ceph cluster in the Create New Ceph Cluster wizard that opens:

    Create new Ceph cluster

    Section

    Parameter name

    Description

    General settings

    Name

    The Ceph cluster name.

    Cluster Network

    Replication network for Ceph OSDs. Must contain the CIDR definition and match the corresponding values of the cluster Subnet object or the environment network values. For configuration examples, see the descriptions of managed-ns_Subnet_storage YAML files in :ref: e2example1.

    Public Network

    Public network for Ceph data. Must contain the CIDR definition and match the corresponding values of the cluster Subnet object or the environment network values. For configuration examples, see the descriptions of managed-ns_Subnet_storage YAML files in :ref: e2example1.

    Enable OSDs LCM

    Select to enable LCM for Ceph OSDs.

    Machines / Machine #1-3

    Select machine

    Select the name of the Kubernetes machine that will host the corresponding Ceph node in the Ceph cluster.

    Manager, Monitor

    Select the required Ceph services to install on the Ceph node.

    Devices

    Select the disk that Ceph will use.

    Warning

    Do not select the device for system services, for example, sda.

    Warning

    A Ceph cluster does not support removable devices that are hosts with hotplug functionality enabled. To use devices as Ceph OSD data devices, make them non-removable or disable the hotplug functionality.

    Enable Object Storage

    Select to enable the single-instance RGW Object Storage.

  6. To add more Ceph nodes to the new Ceph cluster, click + next to any Ceph Machine title in the Machines tab. Configure a Ceph node as required.

    Warning

    Do not add more than 3 Manager and/or Monitor services to the Ceph cluster.

  7. After you add and configure all nodes in your Ceph cluster, click Create.

Once done, verify your Ceph cluster as described in Verify Ceph.

See also

Specify placement of Ceph cluster daemons