Configure multistore for a single Image service API instance

You can configure the Image service (glance) with multiple storage back ends.

Before you begin

  • You have planned networking for storage to ensure connectivity between the storage back ends, the control plane, and the Compute nodes on the data plane. For more information, see Required data center networks.

About this task

To configure multiple back ends for a single Image service API (glanceAPI) instance, you set the enabled_backends parameter with key-value pairs. The key is the identifier for the store and the value is the type of store. The following values are valid:

  • file
  • http
  • rbd
  • swift
  • cinder
  • s3

Procedure

  1. Open your OpenStackControlPlane CR file, openstack_control_plane.yaml, and add the parameters to the glance template to configure the back ends. In the following example, there are two Ceph RBD stores and one Object Storage service (swift) store: 
    ...
spec:
  glance:
    template:
      customServiceConfig: |
        [DEFAULT]
        debug=True
        enabled_backends = ceph-0:rbd,ceph-1:rbd,swift-0:swift
...
  2. Specify the back end to use as the default back end. In the following example, the default back end is ceph-1: 
    ...
      customServiceConfig: |
        [DEFAULT]
        debug=True
        enabled_backends = ceph-0:rbd,ceph-1:rbd,swift-0:swift
        [glance_store]
        default_backend = ceph-1
...
  3. Add the configuration for each back end type you want to use:
    • Add the configuration for the first Ceph RBD store, ceph-0: 
      ...
      customServiceConfig: |
        [DEFAULT]
        ...
        [ceph-0]
        rbd_store_ceph_conf = /etc/ceph/ceph-0.conf
        store_description = "RBD backend"
        rbd_store_pool = images
        rbd_store_user = openstack
...
    • Add the configuration for the second Ceph RBD store, ceph-1: 
      ...
      customServiceConfig: |
        [DEFAULT]
        ...
        [ceph-0]
        ...
        [ceph-1]
        rbd_store_ceph_conf = /etc/ceph/ceph-1.conf
        store_description = "RBD backend 1"
        rbd_store_pool = images
        rbd_store_user = openstack
...
    • Add the configuration for the Object Storage service store, swift-0: 
      ...
      customServiceConfig: |
        [DEFAULT]
        ...
        [ceph-0]
        ...
        [ceph-1]
        ...
        [swift-0]
        swift_store_create_container_on_put = True
        swift_store_auth_version = 3
        swift_store_auth_address = {{ .KeystoneInternalURL }}
        swift_store_key = {{ .ServicePassword }}
        swift_store_user = service:glance
        swift_store_endpoint_type = internalURL
...
  4. Update the control plane: 
    $ oc apply -f openstack_control_plane.yaml -n openstack
  5. Wait until RHOCP creates the resources related to the OpenStackControlPlane CR. Run the following command to check the status: 
    $ oc get openstackcontrolplane -n openstack

    The OpenStackControlPlane resources are created when the status is "Setup complete".

    Tip
    Append the -w option to the end of the get command to track deployment progress.